Multiuser OFDM with adaptive subcarrier, bit, and power allocation

@article{citeulike:885622, abstract = {Multiuser orthogonal frequency division multiplexing (OFDM) with adaptive multiuser subcarrier allocation and adaptive modulation is considered. Assuming knowledge of the instantaneous channel gains for all users, we propose a multiuser OFDM subcarrier, bit, and power allocation algorithm to minimize the total transmit power. This is done by assigning each user a set of subcarriers and by determining the number of bits and the transmit power level for each subcarrier. We obtain the performance of our proposed algorithm in a multiuser frequency selective fading environment for various time delay spread values and various numbers of users. The results show that our proposed algorithm outperforms multiuser OFDM systems with static time-division multiple access (TDMA) or frequency-division multiple access (FDMA) techniques which employ fixed and predetermined time-slot or subcarrier allocation schemes. We have also quantified the improvement in terms of the overall required transmit power, the bit-error rate (BER), or the area of coverage for a given outage probability}, author = {Wong, Cheong Y. and Cheng, R. S. and Lataief, K. B. and Murch, R. D. }, citeulike-article-id = {885622}, doi = {10.1109/49.793310}, journal = {Selected Areas in Communications, IEEE Journal on}, keywords = {adaptive, bit-loading, multiuser, ofdm, power}, number = {10}, pages = {1747--1758}, posted-at = {2007-11-15 12:09:02}, priority = {2}, title = {Multiuser OFDM with adaptive subcarrier, bit, and power allocation}, url = {http://dx.doi.org/10.1109/49.793310}, volume = {17}, year = {1999} }

TY - JOUR ID - citeulike:885622 L3 - citeulike-article-id:885622 TI - Multiuser OFDM with adaptive subcarrier, bit, and power allocation JF - Selected Areas in Communications, IEEE Journal on VL - 17 IS - 10 SP - 1747 EP - 1758 N2 - Multiuser orthogonal frequency division multiplexing (OFDM) with adaptive multiuser subcarrier allocation and adaptive modulation is considered. Assuming knowledge of the instantaneous channel gains for all users, we propose a multiuser OFDM subcarrier, bit, and power allocation algorithm to minimize the total transmit power. This is done by assigning each user a set of subcarriers and by determining the number of bits and the transmit power level for each subcarrier. We obtain the performance of our proposed algorithm in a multiuser frequency selective fading environment for various time delay spread values and various numbers of users. The results show that our proposed algorithm outperforms multiuser OFDM systems with static time-division multiple access (TDMA) or frequency-division multiple access (FDMA) techniques which employ fixed and predetermined time-slot or subcarrier allocation schemes. We have also quantified the improvement in terms of the overall required transmit power, the bit-error rate (BER), or the area of coverage for a given outage probability KW - adaptive KW - bit-loading KW - multiuser KW - ofdm KW - power AU - Wong, Cheong AU - Cheng, RS AU - Lataief, KB AU - Murch, RD PY - 1999/// UR - http://dx.doi.org/10.1109/49.793310 ER -