A Detection Algorithm to Reduce the Condition Number of the Channel Matrix

Title
A Detection Algorithm to Reduce the Condition Number of the Channel Matrix
Author
최승원
Keywords
condition number; projection; lattice reduction; Zero-Forcing
Issue Date
2015-02
Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
Citation
IEICE TRANSACTIONS ON COMMUNICATIONS, v. E98B, NO 2, Page. 280-287
Abstract
When Zero-Forcing (ZF) is adopted as a detector, decreasing the condition number of the channel matrix increases the BER performance. In this paper, we propose a new detection algorithm which reduces the condition number of channel matrix down to nearly 2 on average. Since the least singular value of the channel matrix is a major factor determining the condition number, we, first, project the received signal into a space spanned by singular vectors that are orthogonal to the one corresponding to the least singular value. Then, LR decomposition is performed to reduce further the condition number of the projected channel matrix. Computer simulations show that the performance of the proposed algorithm is comparable to that of the ML detector for both correlated and uncorrelated channels. And also the proposed algorithm provides an at least 2 dB improvement compared to the conventional LR-based Ordered Successive Interference Cancellation (LR-OSIC) detector with a Bit Error Rate (BER) of 10(-3) and a comparable computation load.
URI
http://search.ieice.org/bin/summary.php?id=e98-b_2_280http://hdl.handle.net/20.500.11754/22374
ISSN
1745-1345
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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