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Multi-h CPM简化接收机研究
上官泽胤,杨文革
0
(航天工程大学 电子与光学工程系,北京 101416)
摘要:
考虑到Multi-h CPM(Continuous Phase Modulation)最大似然接收机结构复杂难以工程实现,提出了一种基于Laurent分解和状态空间分类(State-Space Partitioning,SSP)的接收机结构。首先详细介绍了Laurent分解的基本原理,并通过对相位幅度调制(Phase Amplitude Modulation,PAM)脉冲截断和平均两步处理,大大减少了匹配滤波器的数目和网格状态;其次在倾斜相位基础上,介绍了状态空间分类原理,进一步简化网格状态,并引入判决反馈,提高了误码性能;最后给出了Laurent-SSP简化接收机的结构,并分析联合算法的优越性。对ARTM TierⅡ信号进行仿真,结果表明,Laurent-SSP简化接收机所需的匹配滤波器和网格状态数目分别为最大似然接收机的3/128和1/16,在10-5误码率下的性能损失仅为0.2 dB。
关键词:  Multi-h CPM  最大似然序列检测  Laurent分解  状态空间分类  倾斜相位
DOI:
基金项目:
Research on Simplified Multi-h CPM Receiver
SHANGGUAN Zeyin,YANG Wenge
(Department of Electronic and Optical Engineering,Space Engineering University,Beijing 101416,China)
Abstract:
Considering that the structure of Multi-h continuous phase modulation(CPM) maximum likelihood receiver is difficult to implement,this paper proposes a receiver structure based on Laurent decomposition and state-space partitioning(SSP).Firstly,the basic principle of Laurent decomposition is introduced in detail,and the number of matched filters and grid state are greatly reduced by phase amplitude modulation(PAM) pulse truncation and average two-step processing.Secondly,based on the tilted phase,the principle of state-space partition is introduced to simplify the grid state and decision feedback is introduced to improve the error performance.Finally,the Laurent-SSP simplified receiver structure is given and the rationality of the joint algorithm is analyzed.The ARTM TierⅡsignal is simulated and verified.The results show that the number of matched filters and grid states required by the receiver respectively account for 3/128 and 1/16 of the maximum likelihood receivers,and the performance loss at the 10-5 bit error rate is only 0.2 dB.
Key words:  multi-h CPM  maximum-likelihood sequence detection(MLSD)  Laurent decomposition  state-space partitioning  tilted phase
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