14th IFAC Symposium on System Identification, SYSID 2006

SYSID-2006 Paper Abstract

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Paper WeB6.1

Xu, Honghui (U of Iowa), Dasgupta, Soura (Univ. of Iowa)

An Improved Multirate Feedback Scheme for Wireless Channel Identification

Scheduled for presentation during the Regular Session "Identification in Communication Systems" (WeB6), Wednesday, March 29, 2006, 15:30−15:50, Newcastle Room

14th IFAC Symposium on System Identification, March 29 - 31, 2006, Newcastle, Australia

This information is tentative and subject to change. Compiled on July 17, 2018

Keywords Channel Estimation/Equalization, MIMO & Multi-user detection

Abstract

In an earlier paper we had presented a novel dual channel identification approach for mobile wireless communication systems. Unlike traditional channel estimation methods that rely on training symbols, this approach used a bent-pipe feedback mechanism requiring the mobile station (MS) to send portions of its received signal back to the Base Station (BS) for wireless channel identification. Using a filter-bank decomposition concept, we introduced an effective algorithm for identifying both the forward and the reverse channels based only on this feedback information. This new method permits transfer of computational burden from the MS to the resource rich BS and leads to significant savings in bandwidth consuming training signals. This paper proposes a more informative feedback method leading to significant performance improvement over our earlier scheme.