Title :
OFDMA Capacity Analysis in MIMO Channels
Author :
Li, Hongxiang ; Ru, Guanying ; Kim, Younsun ; Liu, Hui
Author_Institution :
Dept. of Electr. & Comput. Eng., North Dakota State Univ., Fargo, ND, USA
Abstract :
In this paper, the performance of orthogonal frequency division multiple access orthogonal frequency division multiple access (OFDMA) is studied in the context of the general multiuser multicarrier multiple-input multiple-output (MIMO) (M3) system for both uplink (UP) and downlink (DL) channels. The relationship between OFDMA and the optimal M3 solution is investigated from an information theoretical point of view. Specifically, the necessary and sufficient conditions of OFDMA being the capacity-maximizing M3 transmission scheme is derived. In addition, OFDMA optimality is explicitly analyzed in some special cases.
Keywords :
MIMO communication; frequency division multiple access; information theory; multiuser channels; wireless channels; MIMO channels; OFDMA capacity analysis; downlink channels; general multiuser multicarrier multiple-input multiple-output system; information theory; orthogonal frequency division multiple access; uplink channels; Covariance matrix; Decoding; Downlink; Eigenvalues and eigenfunctions; Frequency conversion; MIMO; Next generation networking; OFDM; Receivers; Resource management; Signal to noise ratio; Sufficient conditions; WiMAX; Wireless networks; Downlink (DL); multiple-input multiple-output (MIMO); optimality; orthogonal frequency division multiple access (OFDMA); uplink (UL);
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2010.2054710
