％ DYNMODES calculates ocean dynamic vertical modes
％ taking a column vector of Brunt-Vaisala values (Nsq) at
％ different pressures (p) and calculating some number of
％ dynamic modes (nmodes).
％ Note: The input pressures need not be uniformly spaced,
％ and the deepest pressure is assumed to be the bottom.
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
