A single antenna interference cancellation algorithm for OFDM communication systems

Zhenyu Zhou, Takuro Sato

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

Due to limited frequency resources, the co-channel interference (CCI) from adjacent femto cells operating and coexisting with conventional macro cells in the same frequency channel would greatly degrade the bit error rate (BER) performance of mobile terminals. CCI cancellation algorithms for the 2G GSM and the 3G CDMA systems have been under intense research. However, since orthogonal frequency division multiplexing (OFDM) has been adopted in the next generation mobile communication systems, dealing with CCI is more complex in OFDM than in GSM or CDMA because it requires dynamic power control and frequency allocation with advanced coordination among base stations. In this paper, we propose a single antenna interference cancellation (SAIC) algorithm named power adaptive joint maximum a posterior (PA-JMAP) for OFDM systems. The proposed PA-JMAP algorithm jointly decodes the desired and interfering data by using a joint trellis, which defines all possible combinations of each base station's encoder trellis. Signal to interference ratio (SIR) estimated by a sequentially updated estimator is used to track power changes of the received signal. Simulation results show that the proposed PA-JMAP decoder could greatly improve the BER performance for OFDM systems even under severe CCI conditions when compared to a conventional viterbi decoder (CVD).

本文言語English
ホスト出版物のタイトルVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
DOI
出版ステータスPublished - 2009 10 12
イベントVTC Spring 2009 - IEEE 69th Vehicular Technology Conference - Barcelona, Spain
継続期間: 2009 4 262009 4 29

出版物シリーズ

名前IEEE Vehicular Technology Conference
ISSN(印刷版)1550-2252

Conference

ConferenceVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
CountrySpain
CityBarcelona
Period09/4/2609/4/29

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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