PLL DEMODULATION TECHNIQUE FOR M-RAY POSITION PHASE SHIFT KEYING  

作　　者：Qi Chenhao Wu Lenan 

机构地区：[1]School of Information Science and Engineering, Southeast University, Nanjing 210096, China

出　　处：《Journal of Electronics(China)》2009年第3期289-295,共7页电子科学学刊（英文版）

基　　金：Supported by National Natural Science Foundation of China (60472054)

摘　　要：The paper presents a kind of transmission system which employs M-ary Position Phase Shift Keying(MPPSK) to send data and Phase Locked Loop(PLL) based techniques for data retrieve.With a single PLL, MPPSK demodulation is achieved, as well as carrier recovery and symbol synchronization.Firstly, MPPSK modulation method is briefly introduced.2PPSK's PSD expression is given with its optimization result.Orthogonal Phase Detector(PD) and static threshold are used for the purpose of wider phase range and simplicity in demodulation.The data rate is alterable, which is 4.65 kbps for 2PPSK and 9.3 kbps for 4PPSK in the paper.Then some indicative comparisons in Signal to Noise Ratio Symbol Error Rate(SNR-SER) are made among 2PPSK, 3PPSK and 4PPSK, of which 4PPSK has proved to be optimal in ten slots each symbol conditions.And finally, it is demonstrated by system simulations that lower than 10-4 Symbol Error Rate(SER) performance can be obtained at 13 dB symbol SNR.The paper presents a kind of transmission system which employs M-ary Position Phase Shift Keying （MPPSK） to send data and Phase Locked Loop （PLL） based techniques for data retrieve. With a single PLL, MPPSK demodulation is achieved, as well as carrier recovery and symbol synchronization. Firstly, MPPSK modulation method is briefly introduced. 2PPSK＇s PSD expression is given with its optimization result. Orthogonal Phase Detector （PD） and static threshold are used for the purpose of wider phase range and simplicity in demodulation. The data rate is alterable, which is 4.65 kbps for 2PPSK and 9.3 kbps for 4PPSK in the paper. Then some indicative comparisons in Signal to Noise Ratio Symbol Error Rate （SNR-SER） are made among 2PPSK, 3PPSK and 4PPSK, of which 4PPSK has proved to be optimal in ten slots each symbol conditions. And finally, it is demonstrated by system simulations that lower than 10^-4 Symbol Error Rate （SER） performance can be obtained at 13 dB symbol SNR.

关 键 词：Phase Locked Loop （PLL） M-ary Position Phase Shift Keying （MPPSK） Phase Detector （PD） Power Spectrum Density （PSD） 

分 类 号：TN911.23[电子电信—通信与信息系统] TN957.51[电子电信—信息与通信工程]