Performance Analysis of Post-Detection Combining for NFSK and DPSK Systems over Arbitrarily Correlated Nakagami Channels
For differential phase shift keying (DPSK) and noncoherent frequency shift keying (NFSK) systems over fading channels, the post-detection combining method is a popular means for improving the bit error performance. However, the bit error performance of such systems over Nakagami channels with an arbitrary covariance matrix and real distinct fading parameters has been seldom described in the literature. This paper studies the problem using a generic correlated Nakagami fading model and presents a closed form solution which is used to study the influence of the fading parameters and the signal-to-noise ratio (SNR) distribution ratios among all the branches on the bit error performance. Moreover, the average SNRs of each branch are not restricted to one value in the analysis. The closed form solution developed for the problem can be used to study the influence of the fading parameters and the SNR distribution ratios on the error performance.
作 者： HANG Daming CUI Xiaowei CAO Zhigang 作者单位： Department of Electronic Engineering, Tsinghua University, Beijing 100084, China 刊 名： 清华大学学报（英文版） EI 英文刊名： TSINGHUA SCIENCE AND TECHNOLOGY 年，卷(期)： 2006 11(1) 分类号： O4 关键词： differential phase shift keying (DPSK) noncoherent frequency shift keying (NFSK) diversity reception Nakagami channels