GMSK多比特联合差分解调性能分析与仿真  

Performance analysis and simulation of n-bit combined differential demodulation for GMSK signal

作　　者：杨树树[1] 宋小刚[1] 

机构地区：[1]中国航天科工集团8511研究所,江苏南京210007

出　　处：《航天电子对抗》2016年第4期44-46,51,共4页Aerospace Electronic Warfare

摘　　要：高斯最小移频键控(GMSK)调制是一种连续相位的恒包络调制,具有带外辐射小、频谱利用率高的特点,首先介绍了GMSK信号的基本原理,然后在传统的1-bit差分解调、2-bit差分解调的基础上提出一种多比特联合差分解调的算法,并给出了仿真结果。仿真结果表明,该算法具有更好的抗噪声能力,并且结构简单,易于工程实现。Gaussian minimum shift keying （GMSK） is a constant envelope modulation with continuous phase, and achieves good power bandwidth efficiency. The basic principle of GMSK signal firstly is introduced, and then the n bit combined differential demodulation algorithm is presented according to the traditional 1-bit differential demodulation and 2-bit differential demodulation. Simulation result indicates that the proposed algorithm possesses good performance of anti-noise. And it is simple and easy to carry out in the practical project.

关 键 词：高斯最小移频键控 1-bit差分解调 2-bit差分解调 多比特联合差分解调 

分 类 号：TN911.3[电子电信—通信与信息系统]