An equalization technique based on QR decomposition for DSTBC-OFDM systems with distributed carrier frequency offsets

Jaehwan Kim, Hyungjoon Song, Sungsoo Park, Cheolwoo You, Young Hoon Kwun, Daesik Hong

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

Abstract

In the distributed space-time block coded (DSTBC) orthogonal frequency division multiplexing (OFDM) system (DSTBC-OFDM), there may exist distributed carrier frequency offsets (CFOs) by sharing the transmission antennas belonging to different nodes. In this paper, the signal model of the DSTBC-OFDM system with distributed CFOs is presented. Then we propose a new equalization technique via the modification of the QR decomposition (MQRD) in order to eliminate ICI and ISI which are caused by CFOs. The proposed MQRD scheme guarantees transmit diversity gain. Several kinds of equalization techniques are introduced and compared in terms of bit error rate (BER) performance and transmit diversity order. Simulation results show that the proposed method outperforms conventional equalization techniques and achieves equal transmit diversity order with perfectly synchronized DSTBC-OFDM system.

Original languageEnglish
Title of host publication18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
DOIs
Publication statusPublished - 2007 Dec 1
Event18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07 - Athens, Greece
Duration: 2007 Sep 32007 Sep 7

Publication series

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

Other

Other18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
CountryGreece
CityAthens
Period07/9/307/9/7

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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    Kim, J., Song, H., Park, S., You, C., Kwun, Y. H., & Hong, D. (2007). An equalization technique based on QR decomposition for DSTBC-OFDM systems with distributed carrier frequency offsets. In 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07 [4394612] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2007.4394612