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    文件類型: .m
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    發(fā)布日期: 2021-06-03
  • 語(yǔ)言: Matlab
  • 標(biāo)簽:

資源簡(jiǎn)介

通信干擾對(duì)齊中，zf算法，mmse算法，ml算法MIMO通信系統(tǒng)的檢測(cè)器是MIMO技術(shù)實(shí)用過程中關(guān)鍵的一個(gè)模塊，選擇一種檢測(cè)性能好而且便于硬件實(shí)現(xiàn)的檢測(cè)方法是人們追求的目標(biāo)。本文主要介紹幾種常見的檢測(cè)算法，并通過仿真給出各自性能的比較。

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代碼片段和文件信息 

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%?MIMO?QPSK（2x2）?Simulation?Matlab?Code??????????%
%?2013.?03.?11?~?15??????????????????????????????%
%?Kim?Nak?Gyun???????????????????????????????????%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear?all
close?all
clc
echo?off
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%???parameters?%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

tx?=?2;
rx?=?2;
N?=?500;
Eb_N0_dB?=?[0:2:30];



for?q?=?1:length（Eb_N0_dB）

????%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
????%%%%%%%%%%%%%%%%%%%%%%??Transmitter??%%%%%%%%%%%%
????%%%%%%%%%%%%%%%%%%%%%%??Signal??%%%%%%%%%%%%%%%%%
????%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
???
???input1?=?randsrc?（2*tx?N）;
???b=1;
???for?a=1:tx
???????s0（a:）?=?input1（2*b-1?:）?+?（j*input1（2*b?:））;
???????b=b+1;
???end
???

????
????????
????for?b?=?1:N
????????%%%%%%%%%%%%%%%%%%%%%%%??AWGN??%%%%%%%%%%%%%%%%%%%%%%%
????for?a?=?1:tx
????????
????????n1?=?randn（1N）+j*（randn（1N））;
????????Es?=?mean（（s0.*conj（s0）））;
????????Eb?=?Es/2;
????????
????????No?=?（Eb/（10^（Eb_N0_dB（q）/10）））;
????????nn1?=?n1/sqrt（mean（（n1.*conj（n1））））;
????????noise1?=?sqrt（No）.*nn1;
????????noise?（?a??:?）?=（?noise1（::））;
????end
????SNR_dB?=?10*log10（Eb/mean（noise（1:）.*conj（noise（1:））））;
????
????????%%%%%%%%%%%%%%%%%%%%%%%%??Channel??%%%%%%%%%%%%%%%%%%%%%%%
????????H?=?（randn（txrx）+j*randn（txrx））?/?sqrt（2）;
????????
????????%%%%%%%%%%%%%%%%%%%%%%%%??Receiver??%%%%%%%%%%%%%%%%%%%%%%%
????????Yr（:b）?=?H?*?s0（:b）?+?noise（:b）;
????????
????????
????????%%%%%%%%%%%%%%%%%%%??ZF?（Zero?Forcing）?????%%%%%%%%%%%%%%%%
????????H_zf?=?pinv（H）;
????????Y_zf?=?H_zf*Yr;
????????
????????for?c?=?1?:?rx
???????????
????????????if?real（Y_zf（cb））?>=?0
????????????????re_zf（cb）?=?1;
????????????else
????????????????re_zf（cb）?=?-1;
????????????end
????????????
????????????if?imag（Y_zf（cb））?>=0
????????????????imag_zf（cb）?=?1;
????????????else
????????????????imag_zf（cb）?=?-1;
????????????end
????????????Recon_zf（cb）?=?sum（re_zf（cb）?+?（j*imag_zf（cb）））;
????????end
????????
????????%%%%%%%%%%%%%%%%%??MMSE?（Minimum?Mean?Square?Error）???%%%%%%%%%%%%%%%%
???????
????????H

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