A high speed QPSK/OQPSK digital burst modem for LSIC implementation

Author

Seki, Kazuhiko ; Matsumoto, Yoichi ; Kobayashi, Kiyoshi ; Sakata, Tetsu ; Morikura, Masahiro ; Kubota, Shuji ; Kato, Shuzo

Author_Institution

NTT Radio Commun. Syst. Lab., Kanagawa, Japan

fYear

1992

Firstpage

422

Abstract

A fully digital high-speed burst modem is proposed. It employs a reverse-modulation scheme for the carrier recovery circuit, and an interpolation scheme with a pulse shape filter for the bit timing recovery circuit, to recover carrier and bit timing with short preamble words. The major parameters of the modem are shown. Computer simulation results show that the demodulator with short preamble words achieves good performance for burst operation with a low carrier slipping rate and a low clock phase jitter

Keywords

large scale integration; modems; phase shift keying; satellite relay systems; OQPSK; QPSK; bit timing recovery circuit; carrier recovery circuit; carrier slipping rate; clock phase jitter; computer simulation; demodulator; digital high-speed burst modem; interpolation; pulse shape filter; reverse-modulation; satellite systems; short preamble words; Computer simulation; Demodulation; Filters; Interpolation; Modems; Pulse circuits; Pulse shaping methods; Quadrature phase shift keying; Shape; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1992. Conference Record., GLOBECOM '92. Communication for Global Users., IEEE

Conference_Location

Orlando, FL

Print_ISBN

0-7803-0608-2

Type

conf

DOI

10.1109/GLOCOM.1992.276540

Filename

276540