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Research and Implementation of POCET Constant Envelope Modulation Technique

LIU Yun;LI Chuan-zhang;NIU Hui-feng;Unit 92678,PLA;  
This paper,based on the research on the POCET modulation used for GNSS signals,analyzes and discusses the Netwon method and the Gradint algorithm in POCET for searching the optimal solutions.And the Netwon method is chosen to implement the POCET modulation on 4 L1 signals.In addition,this paper studies different phase combinations sue to different initial phases and analyzes the composite PSDs produced by different phase.For the four-signal case,the composite efficiency of the POCET is compared with the one of the Interplex method,and the result shows that the POCET method has better consistency and efficiency.
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