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Demodulation Method for Continuous Phase Modulation Signals Based on Least-Squares Method

Demodulation Method for Continuous Phase Modulation Signals Based on Least-Squares Method Continuous phase modulation (CPM) schemes are attractive for telecommunication systems, which are limited in terms of the bandwidth and signal power due to their high spectral efficiency. In this paper we present a method for the demodulation of continuous phase modulation signals based on least-squares method (LSM). This method (CPM-LSM) is based on the optimal linear estimation of information symbols from the phase of the received signal by solving the overdetermined system of equations using the least squares method. Mathematical substantiation for the application of the proposed CPM-LSM method is presented. Preliminary experimental results of modeling using Geo-Mobile Radio (GMR-2) signals indicate that the method is robust with respect to carrier phase errors. Another feature of CPM-LSM method is that it does not use unique words (symbol patterns for amplitude/phase alignment). The latter fact is very important since unique words usually occupy up to twenty percent of transmitted packet size. The absence of unique words can substantially increase the information throughput. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Radioelectronics and Communications Systems Springer Journals

Demodulation Method for Continuous Phase Modulation Signals Based on Least-Squares Method

Radioelectronics and Communications Systems , Volume 61 (4) – May 28, 2018

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Allerton Press, Inc.
Subject
Engineering; Communications Engineering, Networks
ISSN
0735-2727
eISSN
1934-8061
DOI
10.3103/S0735272718040027
Publisher site
See Article on Publisher Site

Abstract

Continuous phase modulation (CPM) schemes are attractive for telecommunication systems, which are limited in terms of the bandwidth and signal power due to their high spectral efficiency. In this paper we present a method for the demodulation of continuous phase modulation signals based on least-squares method (LSM). This method (CPM-LSM) is based on the optimal linear estimation of information symbols from the phase of the received signal by solving the overdetermined system of equations using the least squares method. Mathematical substantiation for the application of the proposed CPM-LSM method is presented. Preliminary experimental results of modeling using Geo-Mobile Radio (GMR-2) signals indicate that the method is robust with respect to carrier phase errors. Another feature of CPM-LSM method is that it does not use unique words (symbol patterns for amplitude/phase alignment). The latter fact is very important since unique words usually occupy up to twenty percent of transmitted packet size. The absence of unique words can substantially increase the information throughput.

Journal

Radioelectronics and Communications SystemsSpringer Journals

Published: May 28, 2018

References