%1，導(dǎo)頻正負(fù)符號
pilot_syms
%2生成的隨機(jī)序列，后面帶六個尾bit
info_bits
%316QAM映射
TX
%4星座圖
????????a=real（TX）;
????????b=imag（TX）;
????????plot（ab‘bx‘）
%5插入導(dǎo)頻后的子載波映射
Nst?=?52;?????????????????????????????????????%?Number?of?total?subcarriers
Nsd?=?48;?????????????????????????????????????%?Number?of?data?subcarriers
OFDM_sym?=?reshape（TX?Nsd?N_SPF）;???????????%?Reshape?the?modulated?symbols?into?OFDM?symbols
OFDM_sym?=?OFDM_sym.‘;
time_sig?=?zeros（64?N_SPF）;
pilot=[111-1];
for?m?=?1:?N_SPF
????pilot_num=1;
????temp_sym?=?OFDM_sym（m:）;%?Modulate?symbols?to?be?allocated?to?the?mth?OFDM?symbol?of?current?frame??
????temp_pilot?=?pilot_sym（pilot_num）.*pilot（）;??????%?Pilot?symbols?to?be?allocated?to?the?mth?OFDM?symbol?of?current?frame
????
????%?Allocate?the?subcarrier?frequency?according?to?IEEE802.11a?stand.?P23subclause?（17.3.5.9）
????sym_minus_fre?=?[zeros（16）temp_sym（1:5）temp_pilot（1）temp_sym（6:18）temp_pilot（2）temp_sym（19:24）];??%?Allocate?symbol?to?the?minus?frequency?band?
????sym_plus_fre?=?[0temp_sym（25:30）temp_pilot（3）temp_sym（31:43）temp_pilot（4）temp_sym（44:48）zeros（15）];?%?Allocate?symbol?to?the?plus?frequency?band?
????sym_IFFT?=?[sym_plus_fresym_minus_fre];??%?Total?IFFT?symbols??????????????????????????
????temp?=?ifft（sym_IFFT）*sqrt（64）;
????temp?=?temp.‘;
????time_sig（:m）?=?temp;??%?IFFT?convert?frequency?symbols?to?time?signals
????pilot_num?=?mod（pilot_num128）+1;????????????????%?Pilot?symbol?index?+?1?
end

cyc_sig?=?time_sig（49:64:）;??????????????????%?Cyclic?prefix?interval:?T_GI?=?T_FFT/4?
signal_total?=?[cyc_sig;time_sig];????????????%?Add?cyclic?prefix?to?the?time?signal
time_sig=signal_total（:）.‘;??
%6IFFT之前的序列形式
sym_IFFT‘
%7此時的導(dǎo)頻正負(fù)號，
pilot_num???%第幾個
pilot_syms（pilot_num）??%正一還是負(fù)一？
temp_pilot?????????%此時插入的導(dǎo)頻
%8循環(huán)前綴
time_sig
cyc_sig
signal_total???%完整的符號
%9

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1952??2006-10-17?22:01??16QAM\李由\Baogao.m

?????文件???????3360??2006-09-02?21:07??16QAM\李由\channel_model.m

?????文件????????167??2006-08-01?19:31??16QAM\李由\channel_multipath.m

?????文件????????816??2006-08-01?18:40??16QAM\李由\channel_parameter_Jakes.m

?????文件????????533??2006-08-11?11:42??16QAM\李由\channel_Rayleigh.m

?????文件??404070769??2007-05-19?18:56??16QAM\李由\IEEE802.11a_OFDM_PHY.txt

?????文件???????5258??2007-05-18?14:07??16QAM\李由\main.asv

?????文件???????5258??2007-05-18?14:11??16QAM\李由\main.m

?????文件????????456??2006-07-29?16:29??16QAM\李由\pilot_generator.m

?????文件????????471??2007-05-17?21:40??16QAM\李由\ry_16qam_demod.asv

?????文件????????475??2006-10-16?20:11??16QAM\李由\ry_16qam_demod.m

?????文件??????14718??2006-07-29?19:39??16QAM\李由\ry_sovadec.m

?????文件???????1208??2007-05-13?16:32??16QAM\李由\ry_time_to_fre.asv

?????文件???????1208??2006-09-02?21:15??16QAM\李由\ry_time_to_fre.m

?????文件????????919??2006-08-12?10:07??16QAM\李由\test_fre_time_conv.m

?????文件????????545??2006-10-16?20:11??16QAM\李由\tx_16qam_mod.m

?????文件???????2316??2006-10-17?22:01??16QAM\李由\tx_fre_to_time.m

?????目錄??????????0??2011-03-28?11:10??16QAM\李由

?????目錄??????????0??2011-03-28?11:10??16QAM

-----------?---------??----------?-----??----

????????????404110647????????????????????20