摘要
首先介绍了基于LMMSE准则的频域均衡算法的基本原理及其信噪比演进技术,进而采用高斯近似的方法引出了LDPC码的最优设计问题,并通过将优化问题分解为线性优化对其进行迭代求解。针对优化所得的LDPC码进行仿真,结果表明其性能优于已有文献中给出的LDPC码性能,并且更加接近系统容量。
A brief introduction to the frequency-domain equalization algorithm based on Linear Minimum Mean Square Error （LMMSE） is presented, together with its SNR evolution technique. With Gaussian approximation, an issue of designing optimal LD- PC is introduced, and the solution is simplified by solving the linear optimization in an iterative way. Simulations are carried out for the optimized LDPC. The result shows that the performance is superior to that given in literature, and is closer to the ultimate system capacity.
出处
《电视技术》
北大核心
2008年第11期11-13,19,共4页
Video Engineering
基金
清华-高通CDMA无线通信研究项目(20073000463)
