MLSE of shaped BPSK in bandlimited nonlinear channels

Author

Ziemer, Rodger E. ; Turcotte, Randy

Author_Institution

Electr. & Comput. Eng. Dept., Colorado, Univ., Colorado Springs, CO, USA

Volume

2

fYear

1993

fDate

11-14 Oct 1993

Firstpage

455

Abstract

The application of the Viterbi algorithm (VA) to perform maximum-likelihood sequence estimation (MLSE) of shaped biphase-shift keyed (SBPSK) modulation is presented, and its performance characterized in channels typical of UHF military satellite communications by computer simulation. The channel models utilized consist of five-pole Chebyshev and 16 two-pole cascaded Butterworth filters followed, in some cases, by a nonlinear model for a traveling-wave tube (TWT) amplifier proposed by A. A. M. Saleh (1981). The VA detector is compared with integrate-and-dump (I&D) detection and a simplified metric calculation for the VA. The results show that even in severely bandlimited channels with the nonlinearity, VA detection gives improved performance. Without the nonlinearity, VA detection provides an E_b/N_o gain over I&D detection from two to three dB, depending on the amount of bandlimiting

Keywords

Butterworth filters; Chebyshev filters; estimation theory; maximum likelihood estimation; military communication; phase shift keying; satellite communication; telecommunication channels; travelling wave amplifiers; MLSE; TWT amplifier; UHF military satellite communications; Viterbi algorithm; bandlimited nonlinear channels; five-pole Chebyshev filter; integrate-and-dump detection; maximum-likelihood sequence estimation; performance; shaped BPSK; two-pole cascaded Butterworth filters; Application software; Binary phase shift keying; Chebyshev approximation; Computer simulation; Detectors; Filters; Maximum likelihood detection; Maximum likelihood estimation; Military satellites; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1993. MILCOM '93. Conference record. Communications on the Move., IEEE

Conference_Location

Boston, MA

Print_ISBN

0-7803-0953-7

Type

conf

DOI

10.1109/MILCOM.1993.408626

Filename

408626