TY - GEN
T1 - Rate control using antenna selection for closed-loop spatial multiplexing
AU - Ko, Youngwook
AU - Tepedelenlioglu, Cihan
PY - 2005/12/1
Y1 - 2005/12/1
N2 - We propose a closed-loop spatial multiplexing system with limited feedback and rate control over MIMO fading channels. The transmitter adaptation is designed to maximize spectral efficiency subject to an average bit error rate (BER) constraint by adapting the number of substreams based on a given threshold, and a fixed constellation, which determines the instantaneous rate. The proposed system chooses the substream selection threshold as a function of the slowly changing average SNR. We analyze the performance of the proposed system by deriving closed-form expressions for spectral efficiency, average transmit power, and BER. Compared with the rate adaptive orthogonal STBC requiring highly complex constellation adaptation, the proposed rate control method achieves 5 dB power gain for a spectral efficiency of 7 bits/s/Hz at average BER of 10-4, with 2 transmit antennas.
AB - We propose a closed-loop spatial multiplexing system with limited feedback and rate control over MIMO fading channels. The transmitter adaptation is designed to maximize spectral efficiency subject to an average bit error rate (BER) constraint by adapting the number of substreams based on a given threshold, and a fixed constellation, which determines the instantaneous rate. The proposed system chooses the substream selection threshold as a function of the slowly changing average SNR. We analyze the performance of the proposed system by deriving closed-form expressions for spectral efficiency, average transmit power, and BER. Compared with the rate adaptive orthogonal STBC requiring highly complex constellation adaptation, the proposed rate control method achieves 5 dB power gain for a spectral efficiency of 7 bits/s/Hz at average BER of 10-4, with 2 transmit antennas.
UR - http://www.scopus.com/inward/record.url?scp=33846622884&partnerID=8YFLogxK
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U2 - 10.1109/GLOCOM.2005.1578444
DO - 10.1109/GLOCOM.2005.1578444
M3 - Conference contribution
AN - SCOPUS:33846622884
SN - 0780394143
SN - 9780780394148
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 3608
EP - 3612
BT - GLOBECOM'05
T2 - GLOBECOM'05: IEEE Global Telecommunications Conference, 2005
Y2 - 28 November 2005 through 2 December 2005
ER -