NDLI: On effects of power reallocation and ordering in V-BLAST systems with adaptive modulation and antenna selection

Content Provider	IEEE Xplore Digital Library
Author	Hufei Zhu Zhongding Lei Chin, F.
Copyright Year	2004
Description	Author affiliation: Nat. Univ. of Singapore, Singapore (Hufei Zhu)
Abstract	The power reallocation effect and the ordering effect of interference cancellation (IC) of V-BLAST detectors are evaluated in two different systems, which are the V-BLAST system with antenna selection, and the V-BLAST system with both antenna selection and adaptive modulation. Power reallocation is introduced into the antenna selection process to keep a constant total transmit power. The performance of different IC ordering schemes, i.e. the optimal ordering scheme and the fixed ordering scheme, is compared in these systems through intensive simulations. The performance of optimal antenna selection schemes for both IC algorithms is also determined by searching all sets of transmit antennas extensively. It is shown that the performance of the optimal ordering scheme, in terms of throughput is superior to that of the fixed ordering scheme in the V-BLAST system with antenna selection, at the cost of heavy computational load. In the system with both antenna selection and adaptive modulation, the effect of the ordering is not consistent and the throughput of the optimal ordering scheme may sometimes even be worse than that of the fixed ordering scheme. Furthermore, when some optimal antenna selection scheme could be employed, the fixed ordering algorithm and the optimal ordering algorithm would have nearly the same performance.
Starting Page	374
Ending Page	378
File Size	601272
Page Count	5
File Format	PDF
ISBN	0780384083
DOI	10.1109/ISSSTA.2004.1371725
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-08-30
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Adaptive systems Adaptive arrays Transmitting antennas Interference cancellation Throughput System performance Modulation coding Fluctuations Transmitters Power amplifiers
Content Type	Text
Resource Type	Article

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