摘要
针对单载波频域均衡超宽带无线通信系统信道估计中存在的窄带干扰问题,提出了一种基于小波模极大值动态阈值的信道估计方法。该方法在信道最小二乘估计的基础之上进行小波模极大值动态阈值(WMMDT)计算,检测到窄带干扰的位置,然后通过插值法恢复干扰处信道频响。仿真结果表明,在极度频选室内CM4信道模型下,所提出方法较传统方法信道估计性能得到明显改善且复杂度增加不多。
In order to remove narrowband interference, a new method which based on wavelet modulus maxima dynamic threshold is proposed in this paper. The narrowband interference location by wavelet modulus maxima dynamic threshold detection based on the least squares estimation is got firstly. And then, through the interpolation restore the channel frequency response at the interference. Simulation results demonstrate the superior performance of the proposed schemes compared to the existing methods under the extreme frequency selected indoor CM4 channel model and the complexity of proposed schemes does not increase too much.
出处
《电视技术》
北大核心
2014年第3期127-130,共4页
Video Engineering
基金
国家自然科学基金资助项目(61101167)
国家航空科学基金项目(20110142002)
河南科技大学博士科研启动基金资助项目(09001409)
河南科技大学青年科学基金资助项目(2010QN0019)
河南省科技攻关计划项目(112102210431)
关键词
单载波频域均衡
超宽带
窄带干扰
小波模极大值
动态阈值
single carrier frequency domain equalization
tdtra-wideband
narrowband interference
wavelet modulus maxima
dynamic threshold
