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tongxi

于 2010-10-16 发布文件大小:6KB

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下载积分: 1 下载次数: 18

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代码说明：

OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM Multi-CarrierModulation，多载波调制的一种。其主要思想是：将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开，这样可以减少子信道之间的相互干扰 ICI 。每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。本程序实现OFDM与QPSK技术的比较(This program realization technology and the OFDM QPSK technology)

文件列表：

tongxi
......\comb.m,658,2001-11-26
......\crdemapping.m,706,2001-11-29
......\crmapping.m,739,2001-11-29
......\giins.m,846,2001-11-29
......\girem.m,777,2001-11-29
......\ofdm_fading.m,3255,2009-12-07
......\OFDM_System_BER_Simulation.m,928,2009-12-07
......\qpskdemod.m,723,2001-11-27
......\qpskmod.m,914,2001-11-27
......\qqq.m,2735,2009-12-07
......\spream.m,1764,2009-12-07
......\新建文本文档 (2).txt,114,2009-12-08

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