NDLI: Imperfect Carrier Recovery Effect on Filtered PSK Signals

Content Provider	IEEE Xplore Digital Library
Author	Prabhu, V.K.
Copyright Year	1965
Abstract	Coherent demodulation of a PSK signal requires the generation of a local carrier phase reference. Methods are given to determine the detection loss caused by noisy phase recovery and its use in the coherent detection of filtered BPSK and QPSK signals. It is assumed that the phase noise can have a static part and a random component with a Tikhonov-type distribution. The static part is mostly due to offset frequency tracking of the PLL used to recover the carrier, while the random component is due to thermal noise present in the carrier recovery loop and is also due to the random nature of the phase modulation. It is shown that the probability of error of BPSK and QPSK can be expressed as a finite sum of a set of strictly alternating converging series when the number of ISI terms is finite. Upper and lower bounds on the probability of error have been derived when this number becomes infinite and we show how this error rate can be computed with any desired accuracy. Numerical results are presented for various values of static error and phase noise variance when the transmit and receive filters are 4-pole Butterworth filters. For filtered PSK signals and for a bit error rate of 10-6, our results show that the additional degradation in presentday receiver systems due to imperfect carrier recovery can be less than 0.1 dB for BPSK and less than 1 dB for QPSK.
Starting Page	608
Ending Page	615
Page Count	8
File Size	1430443
File Format	PDF
ISSN	00189251
Volume Number	AES-14
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1978-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase shift keying Phase noise Binary phase shift keying Quadrature phase shift keying Phase detection Filters Demodulation Signal generators Frequency Tracking loops
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Aerospace Engineering

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Effect of Quadrature and Demodulation Phase Errors in a Quadrature PSK System

PSK Performance with Imperfect Carrier Phase Recovery

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Acquisition performance of various QPSK carrier tracking loops

False Lock Performance of Quadriphase Receivers

AFC Tracking Algorithms

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