ofdm信道特性

Channel transmission simulator

Channel transmission simulator

％

％ inputs:

％ sig2 - noise variance

％ Mt - number of Tx antennas

％ Mr - number of Rx antennas

％ x - vector of complex input symbols (for MIMO, this is a matrix, where each column

％ is the value of the antenna outputs at a single time instance)

％ H - frequency selective channel - represented in block-Toeplitz form for MIMO transmission

％ N - number of symbols transmitted in OFDM frame

％

％ outputs:

％ y - vector of channel outputs (matrix for MIMO again, just like x matrix)



％ create noise vector sequence (each row is a different antenna, each column is a

％ different time index) note: noise is spatially and temporally white