摘要
中继能够提高信息传输质量及覆盖区域,是一种近年来得到迅速发展且前景广阔的无线通信技术。而性能优良的中继信道估计构成了改善通信环境的其他技术的基础前提。针对中继信道估计中的相位响应部分,首先建立了在任意信噪比条件下的相位噪声模型。考虑到估计过程快速的现实要求,通过将模型中原有复杂的表达噪声形式用高斯的方法近似化,得到了较为简洁的结果,并根据不同的简化形式给出对应的若干相位响应估计算法。为了比较这些算法之间的性能,重点推导了估计算法所能达到的CRLB。最后结合计算机数值仿真验证了结论的正确性。
Recently,Relay has become a booming and promising wireless communication technology,which can improve the information transmission quality and enlarge the service coverage area. Meanwhile,effective relay channel estimation makes up a foundation of other technologies for improving communication invironment,such as relay beamforming and relay selection. Focusing on the phase response in relay channel estimation,the model of phase noise in arbitrary SNR was build up. In order to decrease the amount of estimator calculation,the complicated formula of original noise model is approximated by the relatively simple Gaussian counterpart to get relatively succinct result. According on the different simplified form,several phase estimation algorithms are given. The CRLB（Cramer-Rao Lower Bound）is also derived with the purpose of comparing the performance of the algorithms. The conclusion correctness was verified by computer numerical simulation.
出处
《现代电子技术》
2014年第4期13-16,20,共5页
Modern Electronics Technique
关键词
中继信道
相位响应
估计算法
相位噪声模型
relay channel
phase response
estimation algorithm
phase noise model
