SSMA signal transmission over QPSK modulated signal

M. Morikura, K. Enomoto, S. Kubota, S. Kato

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

2 Citations (Scopus)

Abstract

The superposition of a spread-spectrum multiple-access (SSMA) signal transmission over a quadrature phase-shift-keyed (QPSK) modulated channel is proposed to achieve higher transmission efficiency per transponder and to reduce the lower transmitter power of a small earth station. Experimental results show that under the condition of D/U = 20 dB, the required error probability, Pe = 1 × 10-4, of the QPSK channel is achieved with only 1-dB degradation by using a coding rate of 7/8 forward error correction (FEC), and the required Pe of 1 × 10-4 for the SSMA channel is achieved with 7-dB degradation by using a coding rate of = 1/2 FEC. The link budget shows that the proposed scheme makes it possible to use a low-power SSPA to realize small earth stations.

Original languageEnglish
Title of host publicationGLOBECOM '90
PublisherPubl by IEEE
Pages751-755
Number of pages5
ISBN (Print)0879426322
Publication statusPublished - 1990 Dec 1
EventIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3) - San Diego, CA, USA
Duration: 1990 Dec 21990 Dec 5

Publication series

NameIEEE Global Telecommunications Conference and Exhibition
Volume2

Other

OtherIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3)
CitySan Diego, CA, USA
Period90/12/290/12/5

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Morikura, M., Enomoto, K., Kubota, S., & Kato, S. (1990). SSMA signal transmission over QPSK modulated signal. In GLOBECOM '90 (pp. 751-755). (IEEE Global Telecommunications Conference and Exhibition; Vol. 2). Publ by IEEE.