TY - GEN
T1 - Interference alignment with limited feedback for two-cell interfering MIMO-MAC
AU - Lee, Namyoon
AU - Shin, Wonjae
AU - Heath, Robert W.
AU - Clerckx, Bruno
PY - 2012
Y1 - 2012
N2 - In this paper, we consider a two-cell interfering multiple-input multiple-output multiple access channel (MIMOMAC). We first investigate the multiplexing gain of such channel when users have perfect channel state information at the transmitter (CSIT) by exploiting an interference alignment scheme. In addition, we propose a quantized transmit beamforming vector feedback method for the interference alignment in the limited feedback system. On the basis of the proposed feedback framework, we analyze the rate gap loss and it is shown that in order to keep the same multiplexing gain with the case of perfect CSIT, the number of feedback bits per receiver should be increased linearly with the SNR in dB scale. Throughout the simulation results, it is shown that the sum-rate performance coincides with the derived results.
AB - In this paper, we consider a two-cell interfering multiple-input multiple-output multiple access channel (MIMOMAC). We first investigate the multiplexing gain of such channel when users have perfect channel state information at the transmitter (CSIT) by exploiting an interference alignment scheme. In addition, we propose a quantized transmit beamforming vector feedback method for the interference alignment in the limited feedback system. On the basis of the proposed feedback framework, we analyze the rate gap loss and it is shown that in order to keep the same multiplexing gain with the case of perfect CSIT, the number of feedback bits per receiver should be increased linearly with the SNR in dB scale. Throughout the simulation results, it is shown that the sum-rate performance coincides with the derived results.
UR - http://www.scopus.com/inward/record.url?scp=84871287378&partnerID=8YFLogxK
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U2 - 10.1109/ISWCS.2012.6328431
DO - 10.1109/ISWCS.2012.6328431
M3 - Conference contribution
AN - SCOPUS:84871287378
SN - 9781467307604
T3 - Proceedings of the International Symposium on Wireless Communication Systems
SP - 566
EP - 570
BT - 2012 International Symposium on Wireless Communication Systems, ISWCS 2012 - Proceedings
T2 - 2012 9th International Symposium on Wireless Communication Systems, ISWCS 2012
Y2 - 28 August 2012 through 31 August 2012
ER -