TY - GEN
T1 - Antenna selection for uplink CoMP in dense small-cell clusters
AU - Zeineddine, Khalid
AU - Honig, Michael
AU - Nagaraj, Shirish
AU - Fleming, Philip J.
PY - 2013
Y1 - 2013
N2 - We consider a small-cell cluster consisting of N receive radio-heads connected to a Remote Central Processor (RCP), which jointly decodes K users. Linear filtering across receive antennas is assumed, where the filters are estimated from pilot symbols according to a Least Squares Error (LSE) criterion. Given a limited number of pilot symbols, the Antenna Selection (AS) problem is to determine the subset of radio-heads to include in the filter to maximize the user's Signal-to-Interference-plus-Noise Ratio (SINR). We introduce L 1 and L2-norm constraints on the linear filter and show that there can be a substantial performance loss relative to an exhaustive search over the filter order. We then introduce a weighted-norm constraint, which biases the antenna selection towards those with higher path-gain. The optimized weighting profile is characterized numerically, and the performance is observed to be close to exhaustive search. Finally, we present an algorithm for sequentially adding antennas according to decreasing path-gain, which incurs a modest performance loss relative to exhaustive search.
AB - We consider a small-cell cluster consisting of N receive radio-heads connected to a Remote Central Processor (RCP), which jointly decodes K users. Linear filtering across receive antennas is assumed, where the filters are estimated from pilot symbols according to a Least Squares Error (LSE) criterion. Given a limited number of pilot symbols, the Antenna Selection (AS) problem is to determine the subset of radio-heads to include in the filter to maximize the user's Signal-to-Interference-plus-Noise Ratio (SINR). We introduce L 1 and L2-norm constraints on the linear filter and show that there can be a substantial performance loss relative to an exhaustive search over the filter order. We then introduce a weighted-norm constraint, which biases the antenna selection towards those with higher path-gain. The optimized weighting profile is characterized numerically, and the performance is observed to be close to exhaustive search. Finally, we present an algorithm for sequentially adding antennas according to decreasing path-gain, which incurs a modest performance loss relative to exhaustive search.
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U2 - 10.1109/SPAWC.2013.6612016
DO - 10.1109/SPAWC.2013.6612016
M3 - Conference contribution
AN - SCOPUS:84885716506
SN - 9781467355773
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
SP - 81
EP - 85
BT - 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2013
T2 - 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2013
Y2 - 16 June 2013 through 19 June 2013
ER -