List Detection for Overloaded Receivers with a Linear Array
Krause, Michael
Taylor, Desmond P.
Martin, Philippa A.
Department of Electrical and Computer Engineering, University of Canterbury, Christchurch, New Zealand. Email: michael.krause@elec.canterbury.ac.nz;
This paper appears in: Military Communications Conference, 2007. MILCOM 2007. IEEE
Publication Date: 29-31 Oct. 2007
On page(s): 1-7
Location: Orlando, FL, USA,
ISBN: 978-1-4244-1513-7
Digital Object Identifier: 10.1109/MILCOM.2007.4455042
Current Version Published: 2008-02-22
Abstract
We consider an overloaded wireless multiuser communication system where the number of transmitters exceeds the number of receive antennas. Each user transmits data through a single antenna to a receiver with an M-element uniform linear array. The received signals are combined using maximum ratio diversity combining. Severe co-channel interference (CCI) occurs in such a system due to multiple co-channel users. We present an iterative parallel multiuser detector with list feedback of the best estimates to separate and detect the user symbols. CCI is estimated in the detector using a novel list-based parallel interference cancellation scheme. Simulations show that our algorithm approximates joint-maximum likelihood detection at lower complexity and is well suited for practical application.
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