摘要
介绍了一种适用于CMMB系统的信道估计和信道均衡方案。该方案利用最小二乘(LS)方法估计出导频处的频域响应,对结果进行小波去噪,减小加性噪声的干扰,然后插值得到整个信道的频域响应,可有效减小高斯白噪声的干扰和多径干扰。在高斯白噪声信道和多径信道下的仿真验证结果表明:此方案能有效减小干扰,降低误码率,提高系统性能。
A channel estimation and equalization scheme for CMMB system was described,which has least square( LS) method adopted to estimate frequency response at pilot carriers and then implement wavelet denoising to decrease interference from additive noise as well as interpolate for whole channel frequency response. This scheme can effectively reduce white Gaussian noise and multi-path interference. The simulation results under Gauss white noise channel and multi-path channel show that,this scheme can reduce the interference and the bit error rate along with an improve system performance.
出处
《化工自动化及仪表》
CAS
2016年第10期1070-1073,1078,共5页
Control and Instruments in Chemical Industry
基金
国家重大科学仪器设备开发专项(2012YQ200224
2013YQ200607)
