An Improved Chip Detector for OFDM-IDMA over Fast Time-Variant Channels
Konferenz: ISWCS 2013 - The Tenth International Symposium on Wireless Communication Systems
27.08.2013 - 30.08.2013 in Ilmenau, Deutschland
Tagungsband: ISWCS 2013
Seiten: 5Sprache: EnglischTyp: PDF
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Autoren:
Lianghai, Ji (Chair of Wireless Communication, Technical University of Kaiserslautern, Kaiserslautern, Germany)
Teich, Werner G. (Institute of Communications Engineering, Ulm University, Ulm, Germany)
Inhalt:
We analyze the performance of an orthogonal frequency-division multiplexing interleave-division multiple access (OFDM-IDMA) system over a fast time-variant channel. First we introduce a vector-valued transmission model of a classical OFDM-IDMA system over time-invariant channels. Consecutively, this vector-valued transmission model is used to analyze the effect of fast time-variant channels on an OFDMIDMA system. Based on this, a modified receiver principle with only a moderate increase in complexity is given. Finally, simulation results show that the performance of OFDM-IDMA over fast time-variant channels is improved substantially by the new receiver concept.