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Vector precoding scheme for multi-user MIMO systems

Vector precoding scheme for multi-user MIMO systems

Nijsure, Y., Litchfield, C., Chen, Yifan and Rapajic, P.B. (2009) Vector precoding scheme for multi-user MIMO systems. In: Vehicular Technology Conference Fall (VTC 2009-Fall). Institute of Electrical and Electronic Engineers, Inc, Piscataway, NJ, USA, pp. 1-5. ISBN 978-1-4244-2514-3 (print), 978-1-4244-2515-0 (electronic) ISSN 1090-3038 (doi:

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In this paper, the performance of vector precoding in multiple input multiple output broadcast channels (MIMO BC) is investigated and compared with other channel decomposition techniques utilized for implementing zero forcing (ZF) preceding. It is a known result that ZF precoding requires pseudo inversion of the channel matrix, where this operation is only optimum when the transmitter power is unconstrained. The problem when the transmitter is subject to average or maximum power constraints is well known, where results published have indicated that ZF precoding approaches the maximum capacity bound if the dimensionality of the system is greater than the number of transmitter antennas. A vector precoding technique for MIMO BC channels is investigated in this paper where pseudo inversion is circumvented by employing joint co-operation between transmitter and receiver for all users. This technique adopts a time scheduling approach to service the users which facilitates decentralized multi-user detection at the receiver. This approach yields an improvement to the bit error rate probability by approximately an order of magnitude as compared to the ZF approach utilizing other channel decomposition techniques. The scheme also enables an increase in the capacity of the MIMO BC, with less computational complexity as compared to the techniques employing Moore-Penrose pseudo inverse.

Item Type: Conference Proceedings
Title of Proceedings: Vehicular Technology Conference Fall (VTC 2009-Fall)
Additional Information: This paper appears in proceedings from the 70th IEEE Conference Fall(VTC 2009-Fall) on Vehicular Technology that took place between 20-23 September 2009, location: Anchorage, Alaska.
Uncontrolled Keywords: vector precoding, multiple input multiple output broadcast channels (MIMO BC), zero forcing(ZF), vector precoding technique, decentralized multi-user detection, Moore-Penrose pseudo inverse
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments: School of Engineering
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Last Modified: 14 Oct 2016 09:19

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