400CH SCPC SIGNAL DEMODULATOR USING CHIRP TRANSFORM AND CORRELATION DETECTION SCHEME.

Takeharu Kohri, Masahiro Morikura, Shuzo Kato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A group demodulator for PSK-FDMA (phase-shift-keyed frequency-division multiple access) signals using a chirp transform is proposed for hardware and power consumption reduction of demodulators at a hub station. The proposed demodulator uses a chirp filter for FDM/TDM transform of received PSK-FDMA signals and demodulates TDM transform signals by recovering each channel carrier and clock. Since the chirp filter works as an analog correlator, the transform TDM signals have the maximum S/N (signal-to-noise) ratio at the sampling instant, achieving 2 b/s/Hz frequency utilization efficiency with a QPSK (quadrature phase-shift keyed) modulation scheme. The feasibility test results on the prototype 400-channel demodulator show a good agreement with theory. The proposed group demodulator can contribute to reduce significantly hardware size and power consumption of hub stations.

Original languageEnglish
Title of host publicationUnknown Host Publication Title
PublisherOhmsha Ltd
Pages286-291
Number of pages6
ISBN (Print)4274031888
Publication statusPublished - 1987 Dec 1

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint

Dive into the research topics of '400CH SCPC SIGNAL DEMODULATOR USING CHIRP TRANSFORM AND CORRELATION DETECTION SCHEME.'. Together they form a unique fingerprint.

Cite this