摘要
本文通过MATLAB编程实现正交频分复用(OFDM)的系统仿真,系统采用卷积码和交织码级连的差错控制编码。以高斯噪声信道和电力线信道为例,用本仿真系统分别计算出了无差错控制编码和有差错控制编码情况下误码率与信噪比的关系。结果表明,加入差错控制编码使误码率达到10-3时对信噪比的要求有很大减小。系统误码率随信噪比增加以近似二次曲线下降或部分近似二次曲线下降,以不同系数的二次曲线分别进行模拟,可以控制差值在0.005￣0.02范围内。
This test realized emulational system of OFDM through MATLAB programming, adopted error control coding of concatenation of convolutional codes and interlaced codes. In Gaussian noise channel and power line channel, this emulational system calculate out relationship between bit error rates and signal to noise ratios. Result indicates, it is reduce the request of SNR when made bit error rate arrive at 10-3 that joining error control coding. The bit error rates of system decrease similar to conic drop or part of it similar to conic drop, imitate separately with the conic of different coefficient, can control difference in 0.005-0.02 ranges.
出处
《微计算机信息》
北大核心
2006年第03S期261-264,共4页
Control & Automation
基金
国家自然科学基金"
宽带电力线通信技术研究"
编号60372035。
关键词
正交频分复用
OFDM
卷积编码
交织编码
信噪比
误码率
OFDM, convolutional codes, interlaced codes, signal to noise ratios （SNR）, bit error rates
