%

function?channel_estimate?=?rx_estimate_channel（freq_tr_syms?cir?sim_options）

global?sim_consts;

[n_tx_antennas?n_rx_antennas]?=?get_n_antennas（sim_options）;

if?sim_options.ChannelEstimation
???%?Estimate?from?training?symbols
???if?~sim_options.UseTxDiv
??????for?rx_ant=1:n_rx_antennas
?????????mean_symbols?=?mean（squeeze（freq_tr_syms（rx_ant::））.‘）;
?????????channel_estimate（rx_ant:）?=?mean_symbols.*conj（sim_consts.LongTrainingSymbols）;
??????end
??????channel_estimate?=?channel_estimate.‘;
???else
??????for?rx_ant=1:n_rx_antennas
?????????for?tx_ant?=?1:n_tx_antennas????????????
????????????tr_symbol?=?squeeze（freq_tr_syms（rx_ant?:?tx_ant））;????????????
????????????channel_estimate（（rx_ant-1）*n_tx_antennas+tx_ant:）?=?...
???????????????tr_symbol.*conj（sim_consts.LongTrainingSymbols*sqrt（1/2））;
?????????end
??????end
??????channel_estimate?=?channel_estimate.‘;
???end;
else
???%?Known?channel?estimate
???channel_estimate?=?fft（[zeros（size（cir1）?abs（sim_options.RxTimingOffset））?cir]?64?2）;
???reorder?=?[33:64?1:32];
???channel_estimate（:reorder）?=?channel_estimate;
???channel_estimate?=?channel_estimate（:?sim_consts.UsedSubcIdx）.‘;
end

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????1208??2001-11-18?00:33??rx_estimate_channel.m

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?????????????????1426????????????????????2