Title :
False Lock Performance in Polarity-Type Costas Receivers in the Presence of Periodic Data Patterns
Author :
Wang, James June-Ming ; Lai, Dennis Teng-Tsun ; Heng, Veronica Siang-Gek ; Godfrey, Robert D.
Author_Institution :
LinCom Corporation, 3200 Wilshire Blvd., Suite 300, Los Angeles, CA 90010
Abstract :
This paper addresses the false lock performance of receivers which use polarity-type Costas loops for the carrier recovery of unbalanced QPSK, asynchronous QPSK or 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.
Keywords :
Binary phase shift keying; Frequency; NASA; Numerical models; Quadrature phase shift keying; Relays; Satellites; Shape; Software performance; Software tools;
Conference_Titel :
Military Communications Conference - Crisis Communications: The Promise and Reality, 1987. MILCOM 1987. IEEE
Conference_Location :
Washington, DC, USA
DOI :
10.1109/MILCOM.1987.4795164
