Near capacity linear closed form precoder design with recursive Stream Selection for MU-MIMO broadcast channels

This paper proposes a novel closed form (CF) precoder design for multi-user multiple input multiple output broadcast channel (MU-MIMO BC). The proposed algorithm is based on Null Space Zero-Forcing or Null Space Zero-Forcing with Greedy Stream Selection. The idea is to construct the precoder in a re...

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Vydáno v:2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications s. 336 - 340
Hlavní autoři: Amara, Mustapha, Slock, Dirk, Yuan-Wu, Yi
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.06.2011
Témata:
Base stations
Interference
Null space
Power distribution
Precoding
Signal processing algorithms
Signal to noise ratio
Throughput
Transmitting antennas
Vectors
ISBN:9781424493333, 1424493331
ISSN:1948-3244
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Shrnutí:This paper proposes a novel closed form (CF) precoder design for multi-user multiple input multiple output broadcast channel (MU-MIMO BC). The proposed algorithm is based on Null Space Zero-Forcing or Null Space Zero-Forcing with Greedy Stream Selection. The idea is to construct the precoder in a recursive stream-wise manner. The design proceeds in two steps. The first step is a recursive selection of the best streams, under a zero-forcing (ZF) constraint. The selection is based on an extension of Gram-Schmidt orthogonalization for the MIMO channel case, involving SVDs (geared towards per stream DPC). The streams associated to the strongest singular values get selected. In a second step, the precoder for the selected streams are calculated according to one among several possible precoding techniques with eventually a power distribution optimization. The proposed algorithm is then compared to the best algorithms in the literature namely the ZFBF-SUS and to it's DPC version ZFDPC-SUS. The obtained results showed better performances closer to DPC.
ISBN:9781424493333
1424493331
ISSN:1948-3244
DOI:10.1109/SPAWC.2011.5990425