NDLI: Transmit nonlinear zero forcing: energy efficient receiver oriented transmission in MIMO CDMA mobile radio downlinks

Content Provider	IEEE Xplore Digital Library
Author	Meurer, M. Weber, T. Wei Qiu
Copyright Year	2004
Description	Author affiliation: Kaiserslautern Univ., Germany (Meurer, M.; Weber, T.; Wei Qiu)
Abstract	For the downlink of MIMO TDD/CDMA mobile radio systems, transmission schemes were recently proposed which can be classified as receiver (Rx) oriented. A main asset of these schemes is their low receiver complexity. In addition, they do without sacrificing downlink transmission resources to training signals for channel estimation, which is beneficial for capacity. First investigations concerned linear transmitter (Tx) algorithms and nonlinear Tx algorithms based on the principle of Tomlinson-Harashima precoding; both of these, especially in scenarios with high system loads, show an unsatisfactory performance. Optimum nonlinear Tx algorithms studied later by Peel et al. circumvent this performance drawback, but have been shown to be far from feasible in today's mobile radio systems. We try to fill the gap between the feasible Tx algorithms, with their performance drawbacks, and the optimum Tx algorithm by a scalable nonlinear transmitter algorithm termed transmit nonlinear zero forcing (TxNZF). The crux of this algorithm consists in designing the transmitted signal at the access point (AP) groupwise by a nonlinear approach, and in using multiply connected decision regions in the detectors of the mobile terminals (MT). TxNZF achieves almost optimum performance.
Starting Page	260
Ending Page	269
File Size	662718
Page Count	10
File Format	PDF
ISBN	0780384083
DOI	10.1109/ISSSTA.2004.1371703
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	Energy efficiency Receivers MIMO Multiaccess communication Land mobile radio Downlink Radio transmitters Channel estimation Signal design Algorithm design and analysis
Content Type	Text
Resource Type	Article

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