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Title:
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A High Throughput Configurable SDR Detector for Multi-user MIMO Wireless Systems |
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Author:
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Amiri, Kiarash; Cavallaro, Joseph R.; Dick, Chris; Rao, Raghu Mysore
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Type:
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Journal Paper |
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Publisher:
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Springer |
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Citation:
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K. Amiri, J. R. Cavallaro, C. Dick and R. M. Rao, "A High Throughput Configurable SDR Detector for Multi-user MIMO Wireless Systems," Journal of Signal Processing Systems, vol. 62, no. 2, pp. 233-245, 2009. |
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Abstract:
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Spatial division multiplexing (SDM) in
MIMO technology significantly increases the spectral
efficiency, and hence capacity, of a wireless communication
system: it is a core component of the next generation
wireless systems, e.g. WiMAX, 3GPP LTE and
other OFDM-based communication schemes. Moreover,
spatial division multiple access (SDMA) is one
of the widely used techniques for sharing the wireless
medium between different mobile devices. Sphere detection
is a prominent method of simplifying the detection
complexity in both SDM and SDMA systems
while maintaining BER performance comparable with
the optimum maximum-likelihood (ML) detection. On
the other hand, with different standards supporting
different system parameters, it is crucial for both base
station and handset devices to be configurable and
seamlessly switch between different modes without the
need for separate dedicated hardware units. This challenge
emphasizes the need for SDR designs that target
the handset devices. In this paper, we propose the
architecture and FPGA realization of a configurable
sort-free sphere detector, Flex-Sphere, that supports
4, 16, 64-QAM modulations as well as a combination of 2, 3 and 4 antenna/user configuration for handsets.
The detector provides a data rate of up to 857.1 Mbps
that fits well within the requirements of any of the next
generation wireless standards. The algorithmic optimizations
employed to produce an FPGA friendly realization
are discussed. |
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Date Published:
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2009-04-08 |
