A New Pilot-Signal based Space-Time Adaptive Algorithm

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Nedelko Grbic, Sven Nordholm, Jörgen Nordberg, Ingvar Claesson
Title: A New Pilot-Signal based Space-Time Adaptive Algorithm
Translated title: En ny pilot-signlas rums-tids adaptiv algoritm
Conference name: In Proc. of IEEE International Conference on Communications, ICT 2001
Year: 2001
City: Bucharest
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: ngr@bth.se, sven@atri.curtin.edu.au, jno@bth.se, icl@bth.se
Language: English
Abstract: In the application of adaptive antenna arrays to wireless communications, a known pilot signal sequence may be used for estimating the array response at the beginning of each data frame. This pilot sequence is usually very short and conventional training methods which estimate the array response, based solely on this training sequence, may incur large estimation errors. In this paper, we propose an online modified weighted recursive least squares type of training algorithm for estimating the optimal array response by exploiting information from the whole frame of the received signal. The benefits of the proposed algorithm is that tracking of coherent noise and interference signals is substantially improved, and the overall performance is increased. Simulation results show that the proposed method offers substantial improvement when compared to the conventional least squares method.
Summary in Swedish: En ny adaptiv algoritm presenteras för smart antennas. Fördelen med algoritmen är att även perioder i förbindelsen där utsänd signal är okänd, utförs en blind adaption av kanalutjämning/beamforming.
Subject: Telecommunications\General
Signal Processing\Beamforming
Keywords: Antenna arrays, Smart antennas, Adaptive beamforming, blind beamforming