Title :
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
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;
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
DOI :
10.1109/GLOCOM.1992.276540
