MPPSK接收机位同步实现.pdf

Hans Journal of Wireless Communications 无线通信, 2015, 5(6), 150-156 Published Online December 2015 in Hans. /journal/hjwc /10.12677/hjwc.2015.56021 Phase Synchronization in MPPSK Receiver Yuyang Shi, Lenan Wu Radio Engineering Department, Southeast University, Nanjing Jiangsu th nd th Received: Dec. 8 , 2015; accepted: Dec. 22 , 2015; published: Dec. 25 , 2015 Copyright © 2015 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract As M-ary Position Phase Shift Keying (MPPSK) is a phase-based modulation and phase synchroni- zation is particularly important in actual demodulation system. This paper presents a method of phase synchronization using signal characteristics of MPPSK modulation. The key step is to find the beginning of each symbol period, which will help to locate the correct decision interval and conduct the real-time phase trimming with feedback of demodulated signal. This method can eliminate phase deviation especially in the case of non-integer multiple sampling. Keywords Phase Synchronization, MPPSK, Digital Demodulation, Decision Interval MPPSK接收机位同步实现 施昱阳，吴乐南 东南大学信息科学与工程学院，江苏 南京 收稿日期：2015年12月8 日；录用日期：2015年12月22 日；发布日期：2015年12月25 日 摘 要 鉴于多元位置相移键控(MPPSK)是一种基于位置的调制方式，在硬件解调器中相位同步尤为重要。本文 提出一种MPPSK信号解调器的位同步方式，将利用MPPSK调制自身的信号特性实现同步，核心在于找到 每个符号周期的起始位置，将MPPSK的调制位置定位到正确的判决区间中，并利用解调信号的反馈对接 收信号进行实时相位微调，尤其在非整数倍采样时，能消除因采样点个数取整而引入的相位偏差。 文章引用: 施昱阳, 吴乐南. MPPSK 接收机位同步实现[J]. 无线通信, 2015, 5(6): 150-156. /10.12677/hjwc.2015.56021 施昱阳，吴乐南 关键词 位同步，MPPSK，数字解调，判决区