TY - GEN
T1 - Distributed transmit beamforming
T2 - 2012 International Symposium on Communications and Information Technologies, ISCIT 2012
AU - Tushar, Wayes
AU - Smith, David B.
AU - Saad, Walid
AU - Poor, H. Vincent
PY - 2012
Y1 - 2012
N2 - In this paper a distributed transmit beamforming technique is proposed for time-varying wireless communication channels that improves the signal gain at the receiving terminal, and thus yielding an enhanced signal-to-interference- plus-noise ratio. In this regard, a two-bit feedback algorithm, with considerable gains in terms of received signal strength (RSS), is proposed for optimizing the phase synchronization of signals beamformed from distributed transmitters towards a moving receiver. It is shown that the proposed scheme can successfully capture the impact of time-varying wireless channels on the transmitted signals with reasonable accuracy such that an improved RSS is achieved at the receiver. Numerical experiments show that the proposed two-bit feedback scheme achieves an improved average RSS of about 37.9% and 29.7%, relative to the existing one-bit scheme and the improved one-bit feedback scheme respectively. Results also show that the proposed scheme requires a significantly reduced number of antennas to achieve an RSS equivalent to that of the one-bit feedback schemes.
AB - In this paper a distributed transmit beamforming technique is proposed for time-varying wireless communication channels that improves the signal gain at the receiving terminal, and thus yielding an enhanced signal-to-interference- plus-noise ratio. In this regard, a two-bit feedback algorithm, with considerable gains in terms of received signal strength (RSS), is proposed for optimizing the phase synchronization of signals beamformed from distributed transmitters towards a moving receiver. It is shown that the proposed scheme can successfully capture the impact of time-varying wireless channels on the transmitted signals with reasonable accuracy such that an improved RSS is achieved at the receiver. Numerical experiments show that the proposed two-bit feedback scheme achieves an improved average RSS of about 37.9% and 29.7%, relative to the existing one-bit scheme and the improved one-bit feedback scheme respectively. Results also show that the proposed scheme requires a significantly reduced number of antennas to achieve an RSS equivalent to that of the one-bit feedback schemes.
KW - Distributed beamforming
KW - phase synchronization
KW - received signal strength
KW - space-time communication
KW - time-varying channels
UR - http://www.scopus.com/inward/record.url?scp=84872138791&partnerID=8YFLogxK
U2 - 10.1109/ISCIT.2012.6380949
DO - 10.1109/ISCIT.2012.6380949
M3 - Conference contribution
SN - 9781467311571
T3 - 2012 International Symposium on Communications and Information Technologies, ISCIT 2012
SP - 492
EP - 496
BT - 2012 International Symposium on Communications and Information Technologies, ISCIT 2012
Y2 - 2 October 2012 through 5 October 2012
ER -