%%=====================================================================%%
%In?a?one?transmitting?antenna?and?two?receiving?antenna?collocate
%calculate?the?bits?error?rates?of?the?maximum?ratio?combiningequal?gain?
%combining?selective?combining?and?SISO?system
%%=====================================================================%%
clear?all
clc
close?all
tic;tstart=tic;?????????%計(jì)時(shí)開始

%================Initialize??variables==================================%%
nRxs=2;%發(fā)送天線
nTxs=1;%接收天線
InfoBitLength?=?10000;%the?length?of?the?transimitted?bits
N0=1;%the?unilateral?power?spectral?density?of?white?noise
Var=N0;%the?variance?of?white?noise
sigma=sqrt（Var/2）;
iEbN0=1;
Ber_MRC=zeros（171）;%最大比合并
Ber_SISO=zeros（171）;
Ber_EGC=zeros（171）;%等增益合并
Ber_SLC=zeros（171）;%選擇合并


for?EbN0_dB=-8:8
????EbN0=10^（EbN0_dB/10）;
????Eb=EbN0*N0;?????????????%信號(hào)功率
????A=sqrt（Eb）;
????nError_MRC=0;
????nError_SISO=0;
????nError_EGC=0;
????nError_SLC=0;
????for?iInfoBit=1:InfoBitLength????????%一個(gè)符號(hào)
????????TxBits=randi（[01]）.*2-1;???????%the?transimitted?signals?產(chǎn)生-1或1
????????channel?=?sqrt（0.5）?*?（randn（nRxsnTxs）+1i*randn（nRxsnTxs））;???%瑞利信道
????????noise?=?sigma?*?（randn（nRxs1）+1i*randn（nRxs1））;???????????????%高斯白噪聲
????????RxBits?=?channel*A*TxBits??+?noise;?????????????????????????????%模擬發(fā)送接收
????????
????????%%==========the?estimate?by?SISO=====%%
????????RxBits_SISO=（channel（1）/abs（channel（1）））‘*RxBits（1）;
%?????????RxBits_SISO=channel（1）‘*RxBits（1）;
????????if?real（RxBits_SISO）>0
????????????Estimator_SISO=1;?
????????else
????????????Estimator_SISO=-1;?
????????end
????????if?Estimator_SISO~=TxBits
????????????nError_SISO=nError_SISO+1;
????????end
????????
????????%%==========the?estimate?by?using?MRC====%%
????????RxBits_MRC=channel‘*RxBits/nRxs;
????????if?real（RxBits_MRC）>0
????????????Estimator_MRC=1;
????????else
????????????Estimator_MRC=-1;
????????end
????????if?Estimator_MRC~=TxBits
????????????nError_MRC=nError_MRC+1;
????????end
????????
????????%%==========the?estimate?by?using?EGC====%%
????????RxBits_EGC=（channel./abs（channel））‘*RxBits/nRxs;
????????if?real（RxBits_EGC）>0
????????????Estimator_EGC=1;
????????else
????????????Estimator_EGC=-1;
????????end
????????if?Estimator_EGC~=TxBits
????????????nError_EGC=nError_EGC+1;
????????end
???????
????????%%==========the?estimate?by?using?SLC====%%
????????[ampliRxBitsnumMax]=max（abs（channel））;
????????RxBits_SLC=（channel（numMax）/abs（channel（numMax）））‘*RxBits（numMax）;
%?????????RxBits_SLC=（channel（numMax））‘*RxBits（numMax）;
????????if?real（RxBits_SLC）>0
????????????Estimator_SLC=1;?
????????else
????????????Estimator_SLC=-1;?
????????end
????????if?Estimator_SLC~=TxBits
????????????nError_SLC=nError_SLC+1;
????????end
????????
????end
????Ber_SISO（iEbN0）=nError_SISO/InfoBitLength;
????Ber_MRC（iEbN0）=nError_MRC/InfoBitLength;
????Ber_EGC（iEbN0）=nError_EGC/InfoBitLength;
????Ber_SLC（iEbN0）=nError_SLC/InfoBitL

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????3577??2014-04-26?09:41??MIMO中不同分集技術(shù)對(duì)誤比特率的影響\diversitycombing.m
?????目錄???????????0??2014-04-27?17:16??MIMO中不同分集技術(shù)對(duì)誤比特率的影響\