Bit-stream-arranged weighted modulation scheme for frequency selective fading channels

Kiyoshi Kobayashi, Shuji Kubota

Research output: Contribution to conferencePaper

Abstract

This paper proposes a bit-stream-arranged weighted modulation scheme to improve voice quality in frequency selective fading channels. The proposed modulation scheme employs an input bit stream arrangement method which changes the bit stream order for important bits so that they do not adjoin each other over time and a mapping method which controls the amplitude of modulation signals according to the importance of the bits. Computer simulations clarify that the proposed bit-stream-arranged weighted modulation scheme shows a noise reduction of 7 dB in voice signal compared with the conventional π/4-shift DQPSK modulation scheme.

Original languageEnglish
Pages1258-1262
Number of pages5
Publication statusPublished - 1996 Dec 1
Externally publishedYes
EventProceedings of the 1996 IEEE Communications Theory Mini-Conference. Part 4 (of 4) - London, UK
Duration: 1996 Nov 181996 Nov 22

Other

OtherProceedings of the 1996 IEEE Communications Theory Mini-Conference. Part 4 (of 4)
CityLondon, UK
Period96/11/1896/11/22

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change

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  • Cite this

    Kobayashi, K., & Kubota, S. (1996). Bit-stream-arranged weighted modulation scheme for frequency selective fading channels. 1258-1262. Paper presented at Proceedings of the 1996 IEEE Communications Theory Mini-Conference. Part 4 (of 4), London, UK, .