TY - JOUR
T1 - Adaptive bit-interleaved coded OFDM with reduced feedback information
AU - Sung, Chang Kyung
AU - Chung, Sae Young
AU - Heo, Jun
AU - Lee, Inkyu
N1 - Funding Information:
Paper recommended by Editor R. W. Heath, Jr., the Editor for Coding, Swiching, and Routing of the IEEE Communications Society. Manuscript received July 17, 2005; revised February 14, 2006 and May 25, 2006. This work was supported in part by the Ministry of Information and Communication, Korea, under the Information Technology Research Center Support Program supervised by the Institute of Information Technology Assessment, and in part by the Basic Research Program of the Korea Science and Engineering Foundation under Grant R01-2006-000-11112-0. This paper was presented in part at the IEEE International Conference on Communications, Istanbul, Turkey, June 2006.
PY - 2007/9
Y1 - 2007/9
N2 - If the channel is static and is perfectly known to both the transmitter and the receiver, the water-filling technique with adaptive modulation is known to be optimal (Gallager, 1968). However, for orthogonal frequency-division multiplexing (OFDM) systems, this requires intensive traffic overheads for reporting channel state information on all subcarriers to the transmitter. In this paper, we consider an adaptive modulation and coding scheme for bit-interleaved coded OFDM with reduced feedback information satisfying a specified quality of service level. We propose a rate adaptation scheme, which utilizes the estimated bit error rate for supportable transmission rates. In this scheme, a user equipment chooses a modulation and coding scheme (MCS) level, which can provide the maximum spectral efficiency based on one OFDM symbol rather than on all subchannels. Then the user needs to send back only the selected MCS level index. The proposed scheme does not require the water-filling procedure, and the amount of the feedback information reduces to a single integer value irrespective of the number of subcarriers. Simulation results show that the proposed scheme can significantly reduce the system complexity while minimizing the performance loss compared to the optimum water-filling scheme.
AB - If the channel is static and is perfectly known to both the transmitter and the receiver, the water-filling technique with adaptive modulation is known to be optimal (Gallager, 1968). However, for orthogonal frequency-division multiplexing (OFDM) systems, this requires intensive traffic overheads for reporting channel state information on all subcarriers to the transmitter. In this paper, we consider an adaptive modulation and coding scheme for bit-interleaved coded OFDM with reduced feedback information satisfying a specified quality of service level. We propose a rate adaptation scheme, which utilizes the estimated bit error rate for supportable transmission rates. In this scheme, a user equipment chooses a modulation and coding scheme (MCS) level, which can provide the maximum spectral efficiency based on one OFDM symbol rather than on all subchannels. Then the user needs to send back only the selected MCS level index. The proposed scheme does not require the water-filling procedure, and the amount of the feedback information reduces to a single integer value irrespective of the number of subcarriers. Simulation results show that the proposed scheme can significantly reduce the system complexity while minimizing the performance loss compared to the optimum water-filling scheme.
KW - Adaptive modulation and coding (AMC)
KW - Bit-interleaved coded modulation (BICM)
KW - Fading channels
UR - http://www.scopus.com/inward/record.url?scp=34648825767&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2007.904361
DO - 10.1109/TCOMM.2007.904361
M3 - Article
AN - SCOPUS:34648825767
SN - 0090-6778
VL - 55
SP - 1649
EP - 1655
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 9
ER -