gusucode.com > wlan工具箱matlab源码程序 > wlan/wlanexamples/vhtBeamformingRemoveCSD.m
function y = vhtBeamformingRemoveCSD(x, chanBW, numSTSTotal) % vhtBeamformingRemoveCSD Remove effect of transmitter cyclic shifts % % Y = vhtBeamformingRemoveCSD(X,CHANBW,NUMSTSTOTAL) returns a channel % estimate matrix without the effect of cyclic shifts applied at the % transmitter. % % Y is a complex Nst-by-Nsts-by-Nr array containing the estimated channel % at data and pilot subcarriers without the effects of transmitter cyclic % shifts. Nst is the number of occupied subcarriers, Nsts is the total % number of space-time streams and Nr is the number of receive antennas. % % X is a complex Nst-by-Nsts-by-Nr array containing the estimated channel % at data and pilot subcarriers with the effects of transmitter cyclic % shifts. % Copyright 2015-2016 The MathWorks, Inc. %#codegen csd = wlan.internal.getCyclicShiftVal('VHT', numSTSTotal, ... wlan.internal.cbwStr2Num(chanBW)); cfgOFDM = wlan.internal.wlanGetOFDMConfig(chanBW, 'Long', 'VHT', numSTSTotal); Nfft = cfgOFDM.FFTLength; occupiedIndices = sort([cfgOFDM.DataIndices; cfgOFDM.PilotIndices]); y = wlan.internal.wlanCyclicShift(x, csd, Nfft, 'Rx', occupiedIndices); % [EOF]