A coded VSB-QPSK transmission scheme for digital satellite communications in co-channel interference environments

Author

Sugiyama, Takatoshi ; Kubota, Shuji ; Morikura, Masahiro ; Kato, Shuzo

Author_Institution

NTT Wireless Syst. Labs., Yokosuka, Japan

Volume

32

Issue

3

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

1174

Lastpage

1181

Abstract

A coded VSB (vestigial side band)-QPSK (quadrature phase-shift keying) transmission scheme is proposed to realize interference-resistant digital satellite communication system. It uses an interference suppression filter to suppress the interference power in the receiving side. The suppressed power can be assigned to the transmission signals in advance by also using a same characteristic band limitation filter in the transmission side. Moreover, high coding-gain forward error correction (FEC) is employed to improve the degradation due to I and Q channel crosstalk by interference suppression. When a D/U (desired and undesired signal power ratio) equals 3 dB and a Δf/f_N (Δf: interference frequency offset, f_N: one-half the Nyquist bandwidth) equals 1.05, the proposed scheme achieves an Eb/No improvement of 7.3 dB in a CCI (co-channel interference) environment.

Keywords

cochannel interference; digital communication; interference suppression; quadrature phase shift keying; satellite communication; I channel crosstalk; Q channel crosstalk; QPSK; band limitation filter; co-channel interference; co-channel interference environments; coded VSB; coded VSB-QPSK transmission; degradation; digital satellite communication; high coding-gain forward error correction; interference frequency offset; interference power; interference suppression filter; quadrature phase-shift keying; receiving side; transmission scheme; transmission signals; vestigial side band; Bandwidth; Crosstalk; Degradation; Filters; Forward error correction; Frequency; Interchannel interference; Interference suppression; Phase shift keying; Satellite communication;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.532280

Filename

532280