The possible options in designing digital coherent demodulators of multi-level phase-shift keyed (MPSK) and multi-level differential phase-shift keyed (MDPSK) signals based on a digital phase detector are studied. The demodulation algorithms are introduced that provide optimal digital coherent signal processing. Digital MPSK signal processing requires phase synchronization of the samples produced by the analog-to-digital converter, while the demodulator of MDPSK signals can be implemented without phase synchronization of the reference clock. The analysis of the signal processing procedures is carried out and the time realizations of the responses of the processing algorithms are demonstrated. The estimates of the interference immunity of the proposed demodulation algorithms and the results of statistical simulation of their operation are obtained. The software or hardware implementation of the considered algorithms is discussed.

Topics
Analog-to-digital converter, Demodulators, Phase detector, Wave mechanics, Data processing, Signal processing
1.
B.
 
Sklar
,
Digital Communications: Fundamentals and Applications
(
Prentice Hall
,
Hoboken, NJ
,
2001
).
Google Scholar
 
2.
J.
 
Proakis
 and
M.
 
Salehi
,
Digital Communications
(
McGraw-Hill
,
New York
,
2007
).
Google Scholar
 
3.
K.
 
Feher
, Wireless
Digital Communications. Modulation and Spread Spectrum Applications
(
Prentice-Hall
,
Hoboken, NJ
,
1995
).
Google Scholar
 
4.
G. L.
 
Stuber
,
Principles of Mobile Communication
(
Springer International Publishing
,
Cham
,
2017
).
Google Scholar
Crossref
Search ADS
 
5.
C.
 
Chen
,
W.-D.
 
Zhong
,
X.
 
Li
, and
D.
 
Wu
,
IEEE Photonics Technology Letters
 
26
,
1617
–
1620
(
2014
).
https://doi.org/10.1109/LPT.2014.2329133
Google Scholar
Crossref
Search ADS
 
6.
K.
 
Li
 and
B.
 
Lin
, “
Fiber-based diversity coherent receivers for satellite-to-ground downlink optical communications with MPSK and MQAM modulation techniques
,” in
Algorithms for Intelligent Systems
,
International Conference on Communication Technology Proceedings
, edited by
L.
 
Garg
, et al. (
Springer
,
New York
,
2020
), pp.
583
–
588
.
Google Scholar
Crossref
Search ADS
 
7.
M. I.
 
Petkovic
,
G. T.
 
Djordjevic
,
G. K.
 
Karagiannidis
, and
G. V.
 
Milovanovic
,
IEEE Transactions on Wireless Communications
 
16
,
5442
–
5451
(
2017
).
https://doi.org/10.1109/TWC.2017.2711004
Google Scholar
Crossref
Search ADS
 
8.
“
Error Rate Analysis of MDPSK Modulation in Biological Channel
,” in
2018 Chinese Automation Congress (CAC)
,
CAC Proceedings
, edited by
D.
 
Liu
, et al. (
IEEE
,
Piscataway, NJ
,
2018
), pp.
2791
–
2793
.
Google Scholar
 
9.
P.
 
Stavroulakis
,
TErrestrial Trunked RAdio – TETRA: A Global Security Tool
(
Springer
,
New York
,
2011
).
Google Scholar
 
10.
D. T. C.
 
Wong
,
P.-Y.
 
Kong
,
Y.-C.
 
Liang
,
K. C.
 
Chua
, and
J. W.
 
Mark
,
Wireless Broadband Networks
(
Wiley
,
New York
,
2008
).
Google Scholar
 
11.
O. V.
 
Chernoyarov
,
A. N.
 
Glushkov
,
V. P.
 
Litvinenko
,
B. V.
 
Matveev
, and
A. A.
 
Makarov
,
Engineering Letters
 
28
, p.
1238
–
1248
(
2020
).
Google Scholar
 
12.
O. V.
 
Chernoyarov
,
L. A.
 
Golpaiegani
,
A. N.
 
Glushkov
,
V. P.
 
Litvinenko
, and
B. V.
 
Matveev
,
International Journal of Engineering Transactions A: Basics
 
32
,
510
–
518
(
2019
).
Google Scholar
 
13.
O. V.
 
Chernoyarov
,
A. N.
 
Glushkov
,
Y. V.
 
Litvinenko
,
V. P.
 
Litvinenko
,
B. V.
 
Matveev
, and
T. I.
 
Demina
, RU Patent No. 2,723,445 (11 June
2020
)
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