Deterministic multiuser carrier-frequency offset estimation for interleaved OFDMA uplink

@article{citeulike:2702048, abstract = {In orthogonal frequency-division multiple access (OFDMA), closely spaced multiple subcarriers are assigned to different users for parallel signal transmission. An interleaved subcarrier-assignment scheme is preferred because it provides maximum frequency diversity and increases the capacity in frequency-selective fading channels. The subcarriers are overlapping, but orthogonal to each other such that there is no intercarrier interference (ICI). Carrier-frequency offsets (CFOs) between the transmitter and the receiver destroy the orthogonality and introduces ICI, resulting in multiple-access interference. This paper exploits the inner structure of the signals for CFO estimation in the uplink of interleaved OFDMA systems. A new uplink signal model is presented, and an estimation algorithm based on the signal structure is proposed for estimating the CFOs of all users using only one OFDMA block. Diversity schemes are also presented to improve the estimation performance. Simulation results illustrate the high accuracy and efficiency of the proposed algorithm.}, author = {Cao, Zhongren and Tureli, U. and Yao, Yu-Dong }, booktitle = {Communications, IEEE Transactions on}, citeulike-article-id = {2702048}, doi = {10.1109/TCOMM.2004.833183}, journal = {Communications, IEEE Transactions on}, keywords = {carrier, estimation, frequency, ofdma, offset, uplink}, number = {9}, pages = {1585--1594}, posted-at = {2008-04-22 14:01:14}, priority = {2}, title = {Deterministic multiuser carrier-frequency offset estimation for interleaved OFDMA uplink}, url = {http://dx.doi.org/10.1109/TCOMM.2004.833183}, volume = {52}, year = {2004} }

TY - JOUR ID - citeulike:2702048 L3 - citeulike-article-id:2702048 TI - Deterministic multiuser carrier-frequency offset estimation for interleaved OFDMA uplink T2 - Communications, IEEE Transactions on JF - Communications, IEEE Transactions on VL - 52 IS - 9 SP - 1585 EP - 1594 N2 - In orthogonal frequency-division multiple access (OFDMA), closely spaced multiple subcarriers are assigned to different users for parallel signal transmission. An interleaved subcarrier-assignment scheme is preferred because it provides maximum frequency diversity and increases the capacity in frequency-selective fading channels. The subcarriers are overlapping, but orthogonal to each other such that there is no intercarrier interference (ICI). Carrier-frequency offsets (CFOs) between the transmitter and the receiver destroy the orthogonality and introduces ICI, resulting in multiple-access interference. This paper exploits the inner structure of the signals for CFO estimation in the uplink of interleaved OFDMA systems. A new uplink signal model is presented, and an estimation algorithm based on the signal structure is proposed for estimating the CFOs of all users using only one OFDMA block. Diversity schemes are also presented to improve the estimation performance. Simulation results illustrate the high accuracy and efficiency of the proposed algorithm. KW - carrier KW - estimation KW - frequency KW - ofdma KW - offset KW - uplink AU - Cao, Zhongren AU - Tureli, U AU - Yao, Yu-Dong PY - 2004/// UR - http://dx.doi.org/10.1109/TCOMM.2004.833183 ER -