A maximum-likelihood-based frequency synchronizer for dual-h continuous-phase modulation (CPM)

2002 ◽  
Author(s):  
R.H. Pettit ◽  
B.E. Wahlen ◽  
C.Y. Mai ◽  
R.C. North
Keyword(s):  
Maximum Likelihood ◽  
Phase Modulation ◽  
Continuous Phase ◽  
Continuous Phase Modulation

Complexity Constrained Detection of Continuous Phase Modulation Based on Breadth-First Method

2012 ◽  
Vol 263-266 ◽  
pp. 331-334
Author(s):  
Lei Zhang ◽  
Bin Hu ◽  
Jun Wu ◽  
Zhong Hua Liu
Keyword(s):  
Maximum Likelihood ◽  
Phase Modulation ◽  
Euclidean Distance ◽  
Viterbi Algorithm ◽  
Additive White Gaussian Noise ◽  
Continuous Phase ◽  
Continuous Phase Modulation ◽  
Sequence Detection ◽  
Maximum Likelihood Sequence Detection ◽  
Maximum Likelihood Detector

This paper solves the problem of high detection complexity of continuous phase modulation (CPM) signals over additive white Gaussian noise (AWGN) channel. A complexity constrained sequence detection method for CPM is provided using breadth-first maximum-likelihood sequence detection. The derived result is to reserve only those states which are closest to the received signal in the Euclidean distance after retain one best path for every state. Compared with the maximum-likelihood detector based on Viterbi Algorithm (VA), a significant reduction in complexity is obtained by the suggested detector while maintaining good performances.

scholarly journals Design of Simplified Maximum-Likelihood Receivers for Multiuser CPM Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Li Bing ◽  
Baoming Bai
Keyword(s):  
Maximum Likelihood ◽  
Phase Modulation ◽  
Continuous Phase ◽  
Continuous Phase Modulation ◽  
Multiuser Systems ◽  
Multiuser Receivers ◽  
Parameters Analysis ◽  
Maximum Likelihood Detector ◽  
Mismatched Filters ◽  
Low Dimensional

A class of simplified maximum-likelihood receivers designed for continuous phase modulation based multiuser systems is proposed. The presented receiver is built upon a front end employing mismatched filters and a maximum-likelihood detector defined in a low-dimensional signal space. The performance of the proposed receivers is analyzed and compared to some existing receivers. Some schemes are designed to implement the proposed receivers and to reveal the roles of different system parameters. Analysis and numerical results show that the proposed receivers can approach the optimum multiuser receivers with significantly (even exponentially in some cases) reduced complexity and marginal performance degradation.

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