Computer Science > Information Theory
This paper has been withdrawn by Kyungchun Lee Prof.
[Submitted on 9 Jun 2014 (v1), last revised 30 Dec 2014 (this version, v2)]
Title:ML Detection for MIMO Systems under Channel Estimation Errors
No PDF available, click to view other formatsAbstract:In wireless communication systems, the use of multiple antennas at both the transmitter and receiver is a widely known method for improving both reliability and data rates, as it increases the former through transmit or receive diversity and the latter by spatial multiplexing. In order to detect signals, channel state information (CSI) is typically required at the receiver; however, the estimation of CSI is not perfect in practical systems, which causes performance degradation. In this paper, we propose a novel maximum likelihood (ML) scheme that is robust to channel information errors. By assuming a bound on the total power of channel estimation errors, we apply an optimization method to estimate the instantaneous covariance of channel estimation errors in order to minimize the ML cost function. To reduce computational complexity, we also propose an iterative sphere decoding scheme based on the proposed ML detection method. Simulation results show that the proposed algorithm provides a performance gain in terms of error probability relative to existing algorithms.
Submission history
From: Kyungchun Lee Prof. [view email][v1] Mon, 9 Jun 2014 12:08:21 UTC (117 KB)
[v2] Tue, 30 Dec 2014 05:36:42 UTC (1 KB) (withdrawn)
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