Energy efficient source coding and modulation for wireless applications

Y. Prakash, Sandeep Gupta

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

51 Scopus citations

Abstract

A simple and energy efficient source coded on/off keying modulation and near optimal error detection scheme for wireless applications is presented in this paper. Many low-power battery operated radio systems, especially for microsensor applications, has a need for saving power both at the system level and circuit level implementation. Our main objective in this paper is to come up with energy efficient coded modulation scheme that consumes comparatively less power both at system and circuit level. A simple on/off keying (OOK) digital modulation scheme is used for this purpose. The basic idea of minimum energy coding (ME-coding) for source with known statistics (probabilities of occurrence of symbols) is obtained from [A.C. Erin and H.H. Asada, Dec. 1999]. In ME-coding scheme, source bits are mapped to constant length codes (ME-codes) which has less number of high-bits in it. Since the OOK transmitter consumes energy only when transmitting a high bit, mapping to ME-codes reduces the total energy consumed in RF transmitter. In this paper, we have come up with ME-coding scheme for sources with unknown statistics and we further propose a new method of code-by-code detection that can detect and correct certain errors in the codeword received. The inferior performance of OOK when compared to other simple modulation schemes is overcome by ME-coding. A total of about 6 dB improvement in signal-to-noise ratio (SNR) per bit is observed when a 3-bit message symbol is mapped to a 7-bit ME-code. It also performs 3 dB better than a Hamming (7,4)-coded BPSK.

Original languageEnglish (US)
Title of host publication2003 IEEE Wireless Communications and Networking Conference, WCNC 2003
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages212-217
Number of pages6
ISBN (Electronic)0780377001
DOIs
StatePublished - Jan 1 2003
Event2003 IEEE Wireless Communications and Networking Conference: The Dawn of Pervasive Communication, WCNC 2003 - New Orleans, United States
Duration: Mar 16 2003Mar 20 2003

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
Volume1
ISSN (Print)1525-3511

Other

Other2003 IEEE Wireless Communications and Networking Conference: The Dawn of Pervasive Communication, WCNC 2003
CountryUnited States
CityNew Orleans
Period3/16/033/20/03

ASJC Scopus subject areas

  • Engineering(all)

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    Prakash, Y., & Gupta, S. (2003). Energy efficient source coding and modulation for wireless applications. In 2003 IEEE Wireless Communications and Networking Conference, WCNC 2003 (pp. 212-217). [1200347] (IEEE Wireless Communications and Networking Conference, WCNC; Vol. 1). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.2003.1200347