NDLI: Statistical Rate Allocation for Layered Space

Content Provider	IEEE Xplore Digital Library
Author	Jianxuan Du Ye Li Daqing Gu Molisch, A.F. Jinyun Zhang
Copyright Year	1972
Abstract	We propose a modified layered structure for multiple-input multiple-output systems, where the layer detection order is fixed and the data rate for each layer is allocated based on the detection order and channel statistics. Using a Gaussian approximation of the layer capacities, we derive an asymptotic optimum data-rate-allocation approach. For optimum data-rate allocation, the amount of backoff from the mean layer capacity is proportional to the standard deviation of the layer capacity. With statistical data-rate allocation, only limited channel feedback is needed to update channel statistics at the transmitter. Simulation results show significant performance improvement with the proposed algorithm. We also find that the performance gap between the layered structure and the channel capacity diminishes with increasing ergodicity within each codeword. Numerical results show a singal-to-noise ratio improvement of 6.3 and 3.6 dB for TGn channels "B" and "D," respectively, for 1% outage probability and 9 b/s/Hz spectral efficiency
Starting Page	489
Ending Page	496
Page Count	8
File Size	734995
File Format	PDF
ISSN	00906778
Volume Number	55
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MIMO Statistics Channel capacity Frequency division multiplexing Transmitting antennas Silicon carbide Laboratories Gaussian approximation Feedback Transmitters vertical Bell Labs layered space–time (V-BLAST) Layered space–time coding multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO- OFDM) rate allocation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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