#include <itpp/comm/spread.h>
Public Member Functions | |
Multicode_Spread_1d () | |
Constructor. | |
Multicode_Spread_1d (const mat &incodes) | |
Constructor. | |
vec | spread (const vec &symbols) |
Spreading function. | |
vec | despread (const vec &receivedsignal, int timing) |
Despreading of signal. timing is the start position of the first symbol, given in number of samples. | |
void | set_codes (const mat &incodes) |
Set the spreading codes. Each row represent one spreading code. The spreading factor equals the number of columns. | |
mat | get_codes () |
Returns the matrix containing the spreading codes used as rows in the matrix. | |
short | get_period () |
Returns the spreading factor. | |
short | get_nocodes () |
Returns the number of multi-codes used. | |
Protected Attributes | |
mat | codes |
The spreading codes used size (![]() | |
short | L |
The number of multi-codes. | |
short | N |
The spreading factor. |
Obeserve that the spreading is normalized so that the energy per bit is preserved before and after spreading (that is each symbol is multiplied with 1/sqrt
(N)). Hence, for the multicode case the energy is normalized for one symbol (code) but the transmitted signal consist of a sum of several signals.
Example: See Spread_1d
Definition at line 198 of file spread.h.
itpp::Multicode_Spread_1d::Multicode_Spread_1d | ( | ) | [inline] |
itpp::Multicode_Spread_1d::Multicode_Spread_1d | ( | const mat & | incodes | ) |
Spreading function.
Definition at line 134 of file spread.cpp.
References codes, itpp::floor(), L, N, and itpp::Mat< Num_T >::T().
Referenced by itpp::Multicode_Spread_2d::spread().
Despreading of signal. timing is the start position of the first symbol, given in number of samples.
Definition at line 147 of file spread.cpp.
References codes, itpp::floor(), L, and N.
Referenced by itpp::Multicode_Spread_2d::despread().
void itpp::Multicode_Spread_1d::set_codes | ( | const mat & | incodes | ) |
Set the spreading codes. Each row represent one spreading code. The spreading factor equals the number of columns.
Definition at line 120 of file spread.cpp.
References codes, itpp::Mat< Num_T >::cols(), itpp::Mat< Num_T >::get_row(), L, N, itpp::norm(), itpp::Mat< Num_T >::rows(), and itpp::Mat< Num_T >::set_row().
Referenced by Multicode_Spread_1d(), and itpp::Multicode_Spread_2d::set_codes().
mat itpp::Multicode_Spread_1d::get_codes | ( | ) |
Returns the matrix containing the spreading codes used as rows in the matrix.
Definition at line 129 of file spread.cpp.
References codes.
Referenced by itpp::Multicode_Spread_2d::get_codesI(), and itpp::Multicode_Spread_2d::get_codesQ().
short itpp::Multicode_Spread_1d::get_period | ( | ) | [inline] |
Returns the spreading factor.
Definition at line 213 of file spread.h.
References N.
Referenced by itpp::Multicode_Spread_2d::get_period().
short itpp::Multicode_Spread_1d::get_nocodes | ( | ) | [inline] |
mat itpp::Multicode_Spread_1d::codes [protected] |
The spreading codes used size ().
Definition at line 218 of file spread.h.
Referenced by despread(), get_codes(), set_codes(), and spread().
short itpp::Multicode_Spread_1d::L [protected] |
The number of multi-codes.
Definition at line 220 of file spread.h.
Referenced by despread(), get_nocodes(), set_codes(), and spread().
short itpp::Multicode_Spread_1d::N [protected] |
The spreading factor.
Definition at line 222 of file spread.h.
Referenced by despread(), get_period(), set_codes(), and spread().
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