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Protocol-aided channel equalization in wireless ATM

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2 Author(s)
Bao, J.Q. ; Dept. of Electr. Eng., Connecticut Univ., Storrs, CT, USA ; Lang Tong

We study the equalization problem in time division multiple access wireless asynchronous transfer mode (ATM) systems. Aiming at minimizing the overhead associated with equalization, we propose a protocol-aided channel equalization (PACE) approach for wireless ATM. Specifically, the medium access control (MAC) and data link control (DLC) protocols are exploited to provide known ATM cell headers to the receiver at the base station. A blind channel estimation-decision feedback equalizer (BCE-DFE) algorithm is developed for uplink data transmissions. There are two advantages of the BCE-DFE algorithm: the elimination of training symbols for uplink data bursts and the removal of channel estimation error propagation suffered by conventional block equalization schemes. Simulation results show the BCE-DFE has a robust performance for wireless ATM uplink data transmissions over fast time-varying channels.

Published in:

Selected Areas in Communications, IEEE Journal on  (Volume:18 ,  Issue: 3 )

Date of Publication:

March 2000

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