DocumentCode :
3064018
Title :
Multicarrier Interleave-Division Multiple-Access Systems with Adaptive Pilot-Based User Interleavers
Author :
Mukherjee, Amitav ; Kwon, Hyuck M.
Author_Institution :
Electr. Eng. & Comput. Sci., Univ. of California at Irvine, Irvine, CA, USA
fYear :
2009
fDate :
20-23 Sept. 2009
Firstpage :
1
Lastpage :
5
Abstract :
This paper considers a novel approach to multicarrier orthogonal frequency division multiplexing-based interleave-division multiple-access (OFDM-IDMA) that facilitates both channel estimation and multi-user detection. Specifically, users employ interleavers based upon their channel state information (CSI) to optimize pilot symbol locations, instead of random interleavers as in conventional IDMA. Two variants of this approach are considered: pilot symbols time-multiplexed into the transmit signal after channel encoding, and pilot symbols encoded along with the information bits prior to CSI-based relocation. The encoding of pilot symbols is shown to offer an additional performance benefit at the channel decoders. Simulation results are presented to verify the advantages of the proposed methods with respect to conventional IDMA with uniform and/or uncoded pilot symbols.
Keywords :
OFDM modulation; channel coding; channel estimation; frequency division multiple access; interleaved codes; multiuser detection; wireless channels; OFDM-IDMA; adaptive pilot based user interleavers; channel decoder; channel encoding; channel estimation; channel state information; multi user detection; multicarrier interleave division multiple access systems; multicarrier orthogonal frequency division multiplexing; pilot symbol location; transmit signal; Adaptive systems; Channel estimation; Channel state information; Computer science; Frequency division multiplexing; Interleaved codes; Multiaccess communication; Multiuser detection; Partial transmit sequences; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference Fall (VTC 2009-Fall), 2009 IEEE 70th
Conference_Location :
Anchorage, AK
ISSN :
1090-3038
Print_ISBN :
978-1-4244-2514-3
Electronic_ISBN :
1090-3038
Type :
conf
DOI :
10.1109/VETECF.2009.5378681
Filename :
5378681
Link To Document :
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