Allocation of subchannel based on SINR and OVSF codes with allocation rate to reduce the self interference in OFDMA-CDM with rate adaptation

Satoru Iijima, Iwao Sasase

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

Abstract

In orthogonal frequency division multiple access - code division multiplexing (OFDMA-CDM), rate adaptation is known as one of the key techniques to improve the reliability of the transmission signal. However, since the one subchannel size in OFDMA-CDM depends on the spreading code length, the fading shift which the transmission signal receives per one subchannel might depend on the spreading code length. If the influence of the fading shift can be suppressed according to the multiplexing ratio, the effect of the rate adaptation can be improved. In addition, by allocating the subchannel with multiuser diversity in OFDMA, the effect of the rate adaptation can be more improved. We propose a subchannel allocation scheme based on the maximum, minimum and average signal to interference plus noise ratio (SINR) and orthogonal variable spreading factor (OVSF) code allocation to despread in narrowband according to the multiplexing ratio. We demonstrate that the proposed scheme can improve the bit error rate (BER) performance.

Original languageEnglish
Title of host publication2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009
DOIs
Publication statusPublished - 2009 Dec 1
Event2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009 - Tokyo, Japan
Duration: 2009 Sep 132009 Sep 16

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009
CountryJapan
CityTokyo
Period09/9/1309/9/16

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Iijima, S., & Sasase, I. (2009). Allocation of subchannel based on SINR and OVSF codes with allocation rate to reduce the self interference in OFDMA-CDM with rate adaptation. In 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009 [5450370] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2009.5450370