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Title:
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Reduced QRD-M Detector in MIMO-OFDM Systems With Partial and Embedded Sorting |
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Author:
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Guo, Yuanbin; McCain, Dennis
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Type:
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Conference Paper |
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Keywords:
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MIMO; OFDM; Detector; QRD-M; sorting |
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Publisher:
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IEEE ComSoc |
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Citation:
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Y. Guo and D. McCain,"Reduced QRD-M Detector in MIMO-OFDM Systems With Partial and Embedded Sorting," in IEEE Globecom, |
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Abstract:
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In this paper,we present a reduced QRD-M matrix
symbol detector in MIMO-OFDM systems. The QRD-M algorithm
first decomposes the MIMO channel matrix into upper triangular
matrix and applies a limited tree search to approximate
the maximum-likelihood detector. The metric update is reduced
from O(4.5MC) to O(1.5MC) by extracting the commonality.
We then propose a partial quick-sort procedure and an embedded
insert sort to achieve almost linear sorting. In the second part,
we present efficient VLSI architectures utilizing the parallelism
between subcarriers and design the pipelining in the multi-stage
MIMO processing. The real-time architecture is implemented in
a FPGA-based hardware accelerator with compact form factor,
which achieves up to 100Ã speedup in the simulation time. |
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Date Published:
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2005-11-01 |
