Fakhereddin, Maralle J. and Sharif, Masoud and Hassibi, Babak (2005) Throughput analysis in wideband MIMO broadcast channels with partial feedback. In: 2005 IEEE 6th Workshop on Signal Processing Advances in Wireless Communications. IEEE , Piscataway, NJ, pp. 771-775. ISBN 0-7803-8867-4 http://resolver.caltech.edu/CaltechAUTHORS:20110817-075126475
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Abstract
It has been recently shown that opportunistic transmit beamforming using partial channel state information (CSI) achieves the same throughput scaling obtained from dirty paper coding for a broadcast channel with fixed number of transmit antennas and many receivers M. Sharif et al., (2005). In this paper, we study the generalization of this scheme to wideband broadcast channels. By using orthogonal frequency division multiplexing, an L-tap wideband channel can be decomposed to N parallel narrowband channels, where N is larger than L. Neighboring subchannels are therefore highly correlated, and it is intuitive to say that each group of neighboring subchannels (forming a cluster) can be characterized by one channel quality. We show in this paper that users need only feedback the best signal-to-noise-plus-interference ratio at the center of each cluster. Our results indicate that for cluster size of order ^N/_(L√logK), where K is the number of users, this feedback scheme maintains the same throughput scaling as when full CSI is known. Simulation results show that larger cluster sizes (^N/_(2L)) can also be implemented for a small throughput hit.
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| Additional Information: | © 2005 IEEE. Issue Date: 5-8 June 2005. Date of Current Version: 12 September 2005. This work was supported in part by the National Science Foundation under grant no. CCR-0133818, by the office of Naval Research under grant no. ND0014-02-1-0578, and by Caltech’s Lee Center for Advanced Networking. | ||||||||
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| Record Number: | CaltechAUTHORS:20110817-075126475 | ||||||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20110817-075126475 | ||||||||
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| Official Citation: | Fakhereddin, M.J.; Sharif, M.; Hassibi, B.; , "Throughput analysis in wideband MIMO broadcast channels with partial feedback," Signal Processing Advances in Wireless Communications, 2005 IEEE 6th Workshop on , vol., no., pp. 771- 775, 5-8 June 2005 doi: 10.1109/SPAWC.2005.1506244 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1506244&isnumber=32243 | ||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||
| ID Code: | 24899 | ||||||||
| Collection: | CaltechAUTHORS | ||||||||
| Deposited By: | Ruth Sustaita | ||||||||
| Deposited On: | 17 Aug 2011 15:23 | ||||||||
| Last Modified: | 17 Aug 2011 15:25 |
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