摘要
连续相位调制(CPM)是一种相位连续的恒包络调制方式,以其较高的功率有效性和带宽利用率,在未来军用遥测系统中具有广阔的应用前景。研究适用于多进制部分响应CPM信号的相干解调技术,阐述了如何在信号状态网格图的基础上应用维特比算法对信号进行解调,并给出了最大似然序列检测(MLSD)接收机的结构。在高斯白噪声信道下对该算法进行性能仿真,结果表明,在载波恢复准确的情况下,该算法能够得到最佳的解调性能。
Continuous phase modulation （CPM） phase, which will be widely used in the military is a constant envelope modulation with continuous telemetry system due to its high power and band- width efficiency. The coherent detection based on viterbi algorithm for partial-response M-ary CPM signals was studied, and the Maximum Likelihood Sequence Detection （MLSD） receiver was de- signed in this paper. Simulation results in an additive white Gaussian noise channel show that the al- gorithm has the optimal demodulation performance when the carrier wave is correctly recovered.
出处
《载人航天》
CSCD
2014年第3期279-282,278,共5页
Manned Spaceflight
关键词
遥测
连续相位调制
相干序列检测
维特比算法
telemetry
continuous phase modulation
coherent sequence detection
viterbi algorithm
