Title :
Performance of a suboptimal noncoherent receiver for continuous-phase modulation
Author :
Gass, John H., Jr.
Author_Institution :
Commun. Div., ITT Aerosp., Pendleton, SC, USA
Abstract :
The optimal receiver for continuous-phase modulation (CPM) is a coherent maximum-likelihood sequence estimation (MLSE) receiver. If the phase of the transmitted signal is constant, a noncoherent MLSE receiver performs nearly as well as a coherent MLSE receiver. Phase variation over the course of a transmission, however, can seriously degrade the performance. Some and Kam (see IEEE Trans. Commun., vol.45, p.765-7, July 1997) have proposed a modification of the noncoherent MLSE receiver in which decision statistics are based on subsequences of the received sequence of demodulator outputs. In this paper, we present simulation results for this suboptimal noncoherent receiver for partial-response CPM and examine the sensitivity of the receiver to phase drift and timing offset. The results show that partial-response CPM with noncoherent reception can provide reliable, bandwidth-efficient communication in the presence of errors in symbol timing and carrier frequency
Keywords :
AWGN channels; continuous phase modulation; demodulation; maximum likelihood sequence estimation; signal detection; AWGN channel; CPM; MLSE receiver; carrier frequency errors; continuous-phase modulation; maximum-likelihood sequence estimation; partial-response CPM; phase drift; reliable bandwidth-efficient communication; sensitivity; simulation results; suboptimal noncoherent receiver; symbol timing errors; timing offset; AWGN; Degradation; Demodulation; Frequency estimation; Maximum likelihood estimation; Pulse modulation; Pulse shaping methods; Receivers; Statistics; Timing;
Conference_Titel :
Military Communications Conference, 1998. MILCOM 98. Proceedings., IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4506-1
DOI :
10.1109/MILCOM.1998.722182