Optimal network beamforming for bi-directional relay networks

We consider a relay network which consists of two transceivers and r relay nodes. We study a half-duplex two-way relaying scheme. First, the two transceivers transmit their information symbols simultaneously and the relays receive a noisy mixture of the two transceiver signals. Then each relay adjus...

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Vydáno v:2009 IEEE International Conference on Acoustics, Speech and Signal Processing s. 2277 - 2280
Hlavní autoři: Havary-Nassab, V., Shahbazpanahi, S., Grami, A.
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.04.2009
Témata:
Array signal processing
bi-directional relaying
Bidirectional control
Broadcasting
Distributed beamforming
distributed signal processing
Iterative algorithms
optimal power allocation
Relays
Signal processing
Transceivers
Transmitters
two-way relaying
Vectors
Wireless networks
wireless relay networks
ISBN:9781424423538, 1424423538
ISSN:1520-6149
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Shrnutí:We consider a relay network which consists of two transceivers and r relay nodes. We study a half-duplex two-way relaying scheme. First, the two transceivers transmit their information symbols simultaneously and the relays receive a noisy mixture of the two transceiver signals. Then each relay adjusts the phase and the amplitude of its received signal by multiplying it with a complex beamforming coefficient and transmits the so-obtained signal. Aiming at optimally calculating the beamforming weight vector as well as the transceiver transmit powers, we minimize the total transmit power subject to two constraints on the receive signal-to-noise ratios (SNRs) at the two transceivers. We show that the optimal weight vector can be obtained through a simple iterative algorithm which enjoys a linear computational complexity per iteration.
ISBN:9781424423538
1424423538
ISSN:1520-6149
DOI:10.1109/ICASSP.2009.4960074