Tapped Delay Line (TDL) channel model. More...
#include <itpp/comm/channel.h>
Public Member Functions | |
TDL_Channel (const vec &avg_power_dB="0", const ivec &delay_prof="0") | |
Default constructor. More... | |
TDL_Channel (const Channel_Specification &channel_spec, double sampling_time) | |
Constructor with defined Channel_Specification. Delay profile will be discretized with sampling_time in seconds. More... | |
virtual | ~TDL_Channel () |
Destructor. More... | |
void | set_channel_profile (const vec &avg_power_dB, const ivec &delay_prof) |
Set both average power profile in dB and power delay profile in samples. More... | |
void | set_channel_profile_uniform (int no_taps) |
Set channel profile to uniform with no_taps taps. More... | |
void | set_channel_profile_exponential (int no_taps) |
Set channel profile to exponential with no_taps taps. More... | |
void | set_channel_profile (const Channel_Specification &channel_spec, double sampling_time) |
Set channel profile using Channel_Specification. Delay profile will be discretized with sampling_time in seconds. More... | |
void | set_correlated_method (CORRELATED_METHOD method) |
Set the fading generation method to method. More... | |
void | set_fading_type (FADING_TYPE fading_type) |
Set fading type to one of Independent, Static or Correlated. More... | |
void | set_norm_doppler (double norm_doppler) |
Set normalized Doppler rate. A Correlated fading type will be used. More... | |
void | set_LOS (const vec &relative_power, const vec &relative_doppler="") |
Set LOS parameters for each tap. LOS Doppler will be set to 0.7 by default. More... | |
void | set_LOS_power (const vec &relative_power) |
Set LOS power for each tap. LOS Doppler will be set to 0.7 by default. More... | |
void | set_LOS_doppler (const vec &relative_doppler) |
Set LOS doppler for each tap. A Correlated fading type will be used. More... | |
void | set_doppler_spectrum (const DOPPLER_SPECTRUM *tap_spectrum) |
Set doppler spectrum for each tap in the channel profile. Rice_MEDS method will be used. More... | |
void | set_doppler_spectrum (int tap_number, DOPPLER_SPECTRUM tap_spectrum) |
Set doppler spectrum of tap tap_number. Rice_MEDS method will be used. More... | |
void | set_no_frequencies (int no_freq) |
Set number of sine frequencies. Rice_MEDS method will be used. More... | |
void | set_time_offset (int offset) |
Set fading generators' time offset in samples. A Correlated fading type will be used. More... | |
void | shift_time_offset (int no_samples) |
Shift fading generators' time offset. A Correlated fading type will be used. More... | |
void | set_filter_length (int filter_length) |
Set fading generator filter length. FIR method will be used. More... | |
int | taps () const |
Return the number of channel taps. More... | |
void | get_channel_profile (vec &avg_power_dB, ivec &delay_prof) const |
Get both average power profile in dB and power delay profile in samples. More... | |
vec | get_avg_power_dB () const |
Return power profile in dB. More... | |
ivec | get_delay_prof () const |
Return delay profile in samples. More... | |
CORRELATED_METHOD | get_correlated_method () const |
Return fading generation method. More... | |
FADING_TYPE | get_fading_type () const |
Return fading type. More... | |
double | get_norm_doppler () const |
Return normalized doppler rate. More... | |
vec | get_LOS_power () const |
Get relative power (Rice factor) for each tap. More... | |
vec | get_LOS_doppler () const |
Get relative Doppler (to the maximum Doppler) for each tap. More... | |
double | get_LOS_power (int tap_number) const |
Get relative power (Rice factor) for tap tap_number. More... | |
double | get_LOS_doppler (int tap_number) const |
Get relative Doppler (to the maximum Doppler) for tap tap_number. More... | |
int | get_no_frequencies () const |
Get the minimum number of frequencies used in Rice MEDS fading generator. More... | |
double | get_time_offset () const |
Get fading generators' time ofset. More... | |
double | calc_mean_excess_delay () const |
Calculate mean excess delay in samples. More... | |
double | calc_rms_delay_spread () const |
Calculate RMS delay spread in samples. More... | |
void | init () |
Initialize all fading generators. Automatically invoked in generate() or filter() functions. More... | |
void | generate (int no_samples, Array< cvec > &channel_coeff) |
Generate no_samples values of the channel. More... | |
void | generate (int no_samples, cmat &channel_coeff) |
Generate no_samples values of the channel. Returns the matrix with one tap per column. More... | |
void | filter_known_channel (const cvec &input, cvec &output, const Array< cvec > &channel_coeff) |
Filter the input with the known channel values channel_coeff (e.g. from the generate function) More... | |
void | filter_known_channel (const cvec &input, cvec &output, const cmat &channel_coeff) |
Filter the input with the known channel values channel_coeff (e.g. from the generate function) More... | |
void | filter (const cvec &input, cvec &output, Array< cvec > &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
void | filter (const cvec &input, cvec &output, cmat &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
cvec | filter (const cvec &input, Array< cvec > &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
cvec | filter (const cvec &input, cmat &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
void | filter (const cvec &input, cvec &output) |
Generate channel coefficients and filter the input. Only return the output. More... | |
cvec | filter (const cvec &input) |
Generate channel coefficients and filter the input. Only return output. More... | |
void | operator() (const cvec &input, cvec &output, Array< cvec > &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
void | operator() (const cvec &input, cvec &output, cmat &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
cvec | operator() (const cvec &input, Array< cvec > &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
cvec | operator() (const cvec &input, cmat &channel_coeff) |
Generate channel coefficients and filter the input. Return output and channel coefficients. More... | |
cvec | operator() (const cvec &input) |
Generate channel coefficients and filter the input. Only return output. More... | |
void | calc_impulse_response (const Array< cvec > &channel_coeff, Array< cvec > &impulse_response) |
Calculate impulse-response on the supplied channel coefficients (produced by the generate() function) More... | |
void | calc_frequency_response (const Array< cvec > &channel_coeff, Array< cvec > &frequency_response, const int fft_size) |
Calculate frequency-response on the supplied channel coefficients (produced by the generate() function) More... | |
void | calc_frequency_response (const cmat &channel_coeff, cmat &frequency_response, const int fft_size) |
Calculate frequency-response on the supplied channel coefficients (produced by the generate() function) More... | |
double | get_sampling_time () const |
Return channel sampling time (used for discretization) More... | |
Protected Member Functions | |
void | discretize (const vec &delay_profile) |
Discretize the delay profile with discrete_Ts (Ts). All taps within ((i-0.5)Ts,(i+0.5)Ts] belong to the ith discrete tap. More... | |
Protected Attributes | |
bool | init_flag |
Channel ready to produce data. More... | |
vec | a_prof |
Average amplitude of each tap. More... | |
ivec | d_prof |
Delay in samples for each tap. More... | |
vec | los_power |
Relative power for each Rice component. More... | |
vec | los_dopp |
Relative LOS Doppler for each Rice component. More... | |
int | N_taps |
Number of taps. More... | |
double | n_dopp |
Normalized Doppler of the correlated fading. More... | |
FADING_TYPE | fading_type |
Fading type: Independent (default), Static or Correlated. More... | |
CORRELATED_METHOD | method |
Correlated fading generation method: Rice_MEDS (default), IFFT or FIR. More... | |
Array< DOPPLER_SPECTRUM > | tap_doppler_spectrum |
Doppler spectrum for each tap. More... | |
Array< Fading_Generator * > | fading_gen |
Fading generators for each tap. More... | |
int | filter_length |
Filter length of FIR fading generator. More... | |
int | nrof_freq |
Number of sine frequencies in the Rice MEDS fading generator. More... | |
double | discrete_Ts |
Sampling time of discretization. More... | |
Tapped Delay Line (TDL) channel model.
A time invariant (or at least wide-sense stationary) channel have an impulse response that can be modeled as:
where is the number of channel taps,
is the average amplitude at delay
, and
is the channel phase of the
channel tap. The average power profile, and delay profile are defined as:
and
respectively. We assume without loss of generality that and
.
To initialize the channel profile the following parameters should be defined:
In the case of correlated channel, the correlation in time is decided by the normalized Doppler frequency and Doppler spectrum. The normalized Doppler frequency is calculated as , where
is the maximum Doppler frequency and
is the sample duration.
Two main types of generation methods exist: the filter method and Rice method. In the filter method the correlated fading process is generated with a filtering of the complex Gaussian process to achieve a given Doppler spectrum (Jakes by default). Currently there are two filter implementations:
The preferred method for generating the correlated fading process is the Rice method that approximate the fading process as a sum of sinusoids. Currently there is only one implementation, the Rice Method of Exact Doppler Spread (Rice_MEDS), which is also the default choice.
To summarize, the currently supported correlated fading generation methods are:
Beside the above described correlated methods, two additional fading generators exists: the Independent_Fading_Generator and Static_Fading_Generator ones. Their names are self-explanatory. The only optional parameter of these two generators is a relative_power of the LOS component.
Example: Simulation of WCDMA
References:
itpp::TDL_Channel::TDL_Channel | ( | const vec & | avg_power_dB = "0" , |
const ivec & | delay_prof = "0" |
||
) |
Default constructor.
Definition at line 851 of file channel.cpp.
References set_channel_profile(), set_LOS(), itpp::Array< T >::set_size(), tap_doppler_spectrum, and itpp::zeros().
itpp::TDL_Channel::TDL_Channel | ( | const Channel_Specification & | channel_spec, |
double | sampling_time | ||
) |
Constructor with defined Channel_Specification. Delay profile will be discretized with sampling_time in seconds.
Definition at line 865 of file channel.cpp.
References itpp::Channel_Specification::get_doppler_spectrum(), set_channel_profile(), and tap_doppler_spectrum.
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void itpp::TDL_Channel::set_channel_profile | ( | const vec & | avg_power_dB, |
const ivec & | delay_prof | ||
) |
Set both average power profile in dB and power delay profile in samples.
Definition at line 887 of file channel.cpp.
References a_prof, d_prof, init_flag, it_assert, itpp::min(), N_taps, itpp::norm(), itpp::pow(), set_LOS(), itpp::Array< T >::set_size(), tap_doppler_spectrum, and itpp::zeros().
Referenced by set_channel_profile_exponential(), set_channel_profile_uniform(), and TDL_Channel().
void itpp::TDL_Channel::set_channel_profile_uniform | ( | int | no_taps | ) |
Set channel profile to uniform with no_taps taps.
Definition at line 917 of file channel.cpp.
References it_assert, set_channel_profile(), and itpp::zeros().
void itpp::TDL_Channel::set_channel_profile_exponential | ( | int | no_taps | ) |
Set channel profile to exponential with no_taps taps.
Definition at line 929 of file channel.cpp.
References itpp::dB(), itpp::exp(), it_assert, and set_channel_profile().
void itpp::TDL_Channel::set_channel_profile | ( | const Channel_Specification & | channel_spec, |
double | sampling_time | ||
) |
Set channel profile using Channel_Specification. Delay profile will be discretized with sampling_time in seconds.
Definition at line 944 of file channel.cpp.
References a_prof, discrete_Ts, discretize(), itpp::Channel_Specification::get_channel_profile(), itpp::Channel_Specification::get_doppler_spectrum(), itpp::Channel_Specification::get_LOS_doppler(), itpp::Channel_Specification::get_LOS_power(), init_flag, N_taps, itpp::norm(), itpp::pow(), set_LOS(), and tap_doppler_spectrum.
void itpp::TDL_Channel::set_correlated_method | ( | CORRELATED_METHOD | method | ) |
Set the fading generation method to method.
Definition at line 969 of file channel.cpp.
References fading_type, init_flag, and method.
void itpp::TDL_Channel::set_fading_type | ( | FADING_TYPE | fading_type | ) |
Set fading type to one of Independent, Static or Correlated.
Definition at line 976 of file channel.cpp.
References fading_type, and init_flag.
void itpp::TDL_Channel::set_norm_doppler | ( | double | norm_doppler | ) |
Set normalized Doppler rate. A Correlated fading type will be used.
Definition at line 983 of file channel.cpp.
References fading_type, init_flag, it_assert, and n_dopp.
void itpp::TDL_Channel::set_LOS | ( | const vec & | relative_power, |
const vec & | relative_doppler = "" |
||
) |
Set LOS parameters for each tap. LOS Doppler will be set to 0.7 by default.
Definition at line 994 of file channel.cpp.
References it_assert, los_dopp, los_power, and N_taps.
Referenced by set_channel_profile(), and TDL_Channel().
void itpp::TDL_Channel::set_LOS_power | ( | const vec & | relative_power | ) |
void itpp::TDL_Channel::set_LOS_doppler | ( | const vec & | relative_doppler | ) |
void itpp::TDL_Channel::set_doppler_spectrum | ( | const DOPPLER_SPECTRUM * | tap_spectrum | ) |
Set doppler spectrum for each tap in the channel profile. Rice_MEDS method will be used.
Definition at line 1057 of file channel.cpp.
References init_flag, it_assert, method, n_dopp, N_taps, itpp::Array< T >::set_size(), and tap_doppler_spectrum.
void itpp::TDL_Channel::set_doppler_spectrum | ( | int | tap_number, |
DOPPLER_SPECTRUM | tap_spectrum | ||
) |
Set doppler spectrum of tap tap_number. Rice_MEDS method will be used.
Definition at line 1073 of file channel.cpp.
References init_flag, it_assert, method, n_dopp, N_taps, itpp::Array< T >::set_size(), and tap_doppler_spectrum.
void itpp::TDL_Channel::set_no_frequencies | ( | int | no_freq | ) |
void itpp::TDL_Channel::set_time_offset | ( | int | offset | ) |
Set fading generators' time offset in samples. A Correlated fading type will be used.
Definition at line 1112 of file channel.cpp.
References fading_gen, init(), init_flag, it_assert, n_dopp, and N_taps.
void itpp::TDL_Channel::shift_time_offset | ( | int | no_samples | ) |
Shift fading generators' time offset. A Correlated fading type will be used.
Definition at line 1125 of file channel.cpp.
References fading_gen, init(), init_flag, it_assert, n_dopp, and N_taps.
void itpp::TDL_Channel::set_filter_length | ( | int | filter_length | ) |
Set fading generator filter length. FIR method will be used.
Definition at line 1100 of file channel.cpp.
References filter_length, init_flag, it_assert, method, and n_dopp.
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void itpp::TDL_Channel::get_channel_profile | ( | vec & | avg_power_dB, |
ivec & | delay_prof | ||
) | const |
Get both average power profile in dB and power delay profile in samples.
Definition at line 1138 of file channel.cpp.
References a_prof, d_prof, and itpp::log10().
vec itpp::TDL_Channel::get_avg_power_dB | ( | ) | const |
Return power profile in dB.
Definition at line 1145 of file channel.cpp.
References a_prof, and itpp::log10().
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double itpp::TDL_Channel::get_time_offset | ( | ) | const |
Get fading generators' time ofset.
Definition at line 1150 of file channel.cpp.
References fading_gen.
double itpp::TDL_Channel::calc_mean_excess_delay | ( | ) | const |
Calculate mean excess delay in samples.
Definition at line 1158 of file channel.cpp.
References a_prof, d_prof, itpp::sqr(), and itpp::sum_sqr().
double itpp::TDL_Channel::calc_rms_delay_spread | ( | ) | const |
Calculate RMS delay spread in samples.
Definition at line 1163 of file channel.cpp.
References a_prof, d_prof, itpp::sqr(), itpp::sqrt(), itpp::sum_sqr(), and itpp::to_vec().
void itpp::TDL_Channel::init | ( | ) |
Initialize all fading generators. Automatically invoked in generate() or filter() functions.
Definition at line 1171 of file channel.cpp.
References fading_gen, fading_type, filter_length, init_flag, it_assert, it_error, los_dopp, los_power, method, n_dopp, N_taps, nrof_freq, and tap_doppler_spectrum.
Referenced by generate(), set_time_offset(), and shift_time_offset().
void itpp::TDL_Channel::generate | ( | int | no_samples, |
Array< cvec > & | channel_coeff | ||
) |
Generate no_samples values of the channel.
Definition at line 1268 of file channel.cpp.
References a_prof, fading_gen, init(), init_flag, N_taps, and itpp::Array< T >::set_size().
Referenced by filter(), and generate().
void itpp::TDL_Channel::generate | ( | int | no_samples, |
cmat & | channel_coeff | ||
) |
Generate no_samples values of the channel. Returns the matrix with one tap per column.
Definition at line 1278 of file channel.cpp.
References a_prof, fading_gen, generate(), init(), init_flag, and N_taps.
void itpp::TDL_Channel::filter_known_channel | ( | const cvec & | input, |
cvec & | output, | ||
const Array< cvec > & | channel_coeff | ||
) |
Filter the input with the known channel values channel_coeff (e.g. from the generate function)
Definition at line 1289 of file channel.cpp.
References itpp::concat(), d_prof, itpp::elem_mult(), itpp::max(), N_taps, and itpp::zeros_c().
Referenced by filter().
void itpp::TDL_Channel::filter_known_channel | ( | const cvec & | input, |
cvec & | output, | ||
const cmat & | channel_coeff | ||
) |
Filter the input with the known channel values channel_coeff (e.g. from the generate function)
Definition at line 1300 of file channel.cpp.
References itpp::concat(), d_prof, itpp::elem_mult(), itpp::max(), N_taps, and itpp::zeros_c().
void itpp::TDL_Channel::filter | ( | const cvec & | input, |
cvec & | output, | ||
Array< cvec > & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1311 of file channel.cpp.
References filter_known_channel(), and generate().
Referenced by filter(), and operator()().
void itpp::TDL_Channel::filter | ( | const cvec & | input, |
cvec & | output, | ||
cmat & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1317 of file channel.cpp.
References filter_known_channel(), and generate().
cvec itpp::TDL_Channel::filter | ( | const cvec & | input, |
Array< cvec > & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1323 of file channel.cpp.
References filter().
cvec itpp::TDL_Channel::filter | ( | const cvec & | input, |
cmat & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1330 of file channel.cpp.
References filter().
void itpp::TDL_Channel::filter | ( | const cvec & | input, |
cvec & | output | ||
) |
Generate channel coefficients and filter the input. Only return the output.
Definition at line 1337 of file channel.cpp.
References filter().
cvec itpp::TDL_Channel::filter | ( | const cvec & | input | ) |
Generate channel coefficients and filter the input. Only return output.
Definition at line 1343 of file channel.cpp.
References filter().
void itpp::TDL_Channel::operator() | ( | const cvec & | input, |
cvec & | output, | ||
Array< cvec > & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1351 of file channel.cpp.
References filter().
void itpp::TDL_Channel::operator() | ( | const cvec & | input, |
cvec & | output, | ||
cmat & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1356 of file channel.cpp.
References filter().
cvec itpp::TDL_Channel::operator() | ( | const cvec & | input, |
Array< cvec > & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1362 of file channel.cpp.
References filter().
cvec itpp::TDL_Channel::operator() | ( | const cvec & | input, |
cmat & | channel_coeff | ||
) |
Generate channel coefficients and filter the input. Return output and channel coefficients.
Definition at line 1367 of file channel.cpp.
References filter().
cvec itpp::TDL_Channel::operator() | ( | const cvec & | input | ) |
Generate channel coefficients and filter the input. Only return output.
Definition at line 1372 of file channel.cpp.
References filter().
void itpp::TDL_Channel::calc_impulse_response | ( | const Array< cvec > & | channel_coeff, |
Array< cvec > & | impulse_response | ||
) |
Calculate impulse-response on the supplied channel coefficients (produced by the generate() function)
Definition at line 1378 of file channel.cpp.
References d_prof, init_flag, it_assert, N_taps, itpp::Array< T >::set_size(), and itpp::Array< T >::size().
void itpp::TDL_Channel::calc_frequency_response | ( | const Array< cvec > & | channel_coeff, |
Array< cvec > & | frequency_response, | ||
const int | fft_size | ||
) |
Calculate frequency-response on the supplied channel coefficients (produced by the generate() function)
Definition at line 1398 of file channel.cpp.
References d_prof, itpp::fft(), init_flag, it_assert, N_taps, itpp::Array< T >::set_size(), and itpp::Array< T >::size().
void itpp::TDL_Channel::calc_frequency_response | ( | const cmat & | channel_coeff, |
cmat & | frequency_response, | ||
const int | fft_size | ||
) |
Calculate frequency-response on the supplied channel coefficients (produced by the generate() function)
Definition at line 1422 of file channel.cpp.
References d_prof, itpp::fft(), init_flag, it_assert, and N_taps.
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Discretize the delay profile with discrete_Ts (Ts). All taps within ((i-0.5)Ts,(i+0.5)Ts] belong to the ith discrete tap.
delay_profile | Delay profile in seconds. |
Definition at line 1447 of file channel.cpp.
References a_prof, d_prof, discrete_Ts, itpp::elem_div(), it_assert, it_warning, los_dopp, los_power, N_taps, itpp::round_i(), itpp::Array< T >::set_size(), itpp::Array< T >::size(), itpp::sqr(), itpp::sqrt(), and tap_doppler_spectrum.
Referenced by set_channel_profile().
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Channel ready to produce data.
Definition at line 993 of file channel.h.
Referenced by calc_frequency_response(), calc_impulse_response(), generate(), init(), set_channel_profile(), set_correlated_method(), set_doppler_spectrum(), set_fading_type(), set_filter_length(), set_LOS_doppler(), set_LOS_power(), set_no_frequencies(), set_norm_doppler(), set_time_offset(), and shift_time_offset().
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Average amplitude of each tap.
Definition at line 994 of file channel.h.
Referenced by calc_mean_excess_delay(), calc_rms_delay_spread(), discretize(), generate(), get_avg_power_dB(), get_channel_profile(), and set_channel_profile().
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Delay in samples for each tap.
Definition at line 995 of file channel.h.
Referenced by calc_frequency_response(), calc_impulse_response(), calc_mean_excess_delay(), calc_rms_delay_spread(), discretize(), filter_known_channel(), get_channel_profile(), and set_channel_profile().
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Relative power for each Rice component.
Definition at line 996 of file channel.h.
Referenced by discretize(), init(), set_LOS(), set_LOS_doppler(), and set_LOS_power().
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Relative LOS Doppler for each Rice component.
Definition at line 997 of file channel.h.
Referenced by discretize(), init(), set_LOS(), set_LOS_doppler(), and set_LOS_power().
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Number of taps.
Definition at line 998 of file channel.h.
Referenced by calc_frequency_response(), calc_impulse_response(), discretize(), filter_known_channel(), generate(), init(), set_channel_profile(), set_doppler_spectrum(), set_LOS(), set_LOS_power(), set_time_offset(), and shift_time_offset().
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Normalized Doppler of the correlated fading.
Definition at line 999 of file channel.h.
Referenced by init(), set_doppler_spectrum(), set_filter_length(), set_LOS_doppler(), set_no_frequencies(), set_norm_doppler(), set_time_offset(), and shift_time_offset().
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Fading type: Independent (default), Static or Correlated.
Definition at line 1000 of file channel.h.
Referenced by init(), set_correlated_method(), set_fading_type(), and set_norm_doppler().
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Correlated fading generation method: Rice_MEDS (default), IFFT or FIR.
Definition at line 1001 of file channel.h.
Referenced by init(), set_correlated_method(), set_doppler_spectrum(), set_filter_length(), and set_no_frequencies().
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Doppler spectrum for each tap.
Definition at line 1002 of file channel.h.
Referenced by discretize(), init(), set_channel_profile(), set_doppler_spectrum(), and TDL_Channel().
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Fading generators for each tap.
Definition at line 1003 of file channel.h.
Referenced by generate(), get_time_offset(), init(), set_time_offset(), shift_time_offset(), and ~TDL_Channel().
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Filter length of FIR fading generator.
Definition at line 1004 of file channel.h.
Referenced by init(), and set_filter_length().
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Number of sine frequencies in the Rice MEDS fading generator.
Definition at line 1005 of file channel.h.
Referenced by init(), and set_no_frequencies().
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Sampling time of discretization.
Definition at line 1006 of file channel.h.
Referenced by discretize(), and set_channel_profile().
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