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Forward link antenna diversity using feedback for indoor communication systems

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2 Author(s)
Jen-Wei Liang ; Inf. Syst. Lab., Stanford Univ., CA, USA ; Paulraj, A.J.

An approach to mitigate forward link signal fading in a FDD communication system by using an adaptive transmit antenna array and feedback on the reverse link is presented. In a personal communication system environment, multipath propagations can lead to severe space selective fading. Cordless phones and similar devices which cannot conveniently provide multiple antennas at the receiver can suffer from long term fading and therefore have unacceptable quality. Using multiple adaptive transmit antennas, we can adjust the transmission weights to ensure the user is kept out of deep fades. This is achieved by using feedback of the received signal level on the reverse link and adapting the transmission weights. Simulation shows that significant gain against the fading characteristics can be achieved

Published in:

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on  (Volume:3 )

Date of Conference:

9-12 May 1995

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