False lock performance in polarity-type Costas receivers in the presence of periodic data patternsThe authors address the false-lock performance of receivers which use polarity-type Costas loops for the carrier recovery of unbalanced quadrature phase-shift keyed (QPSK), asynchronous QPSK or binary PSK (BPSK) signals in the presence of periodic data patterns. The potential false-lock frequencies are first identified. Expressions for both true-lock and false-lock components are also derived, thereby allowing numerical evaluation of various key parameters for cases of practical interest.
Document ID
19880050578
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wang, James June-Ming (LinCom Corp. Los Angeles, CA, United States)
Lai, Dennis Teng-Tsun (LinCom Corp. Los Angeles, CA, United States)
Heng, Veronica Siang-Gek (LinCom Corp. Los Angeles, CA, United States)
Godfrey, Robert D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Communications And Radar
Meeting Information
Meeting: MILCOM ''87 - IEEE Military Communications Conference