DocumentCode :
2662673
Title :
Real-time smart antenna system incorporating FPGA-based fast DOA estimator
Author :
Kim, Minseok ; Ichige, Koichi ; Arai, Hiroyuki
Author_Institution :
Graduate Sch. of Eng., Yokohama Nat. Univ., Japan
Volume :
1
fYear :
2004
fDate :
26-29 Sept. 2004
Firstpage :
160
Abstract :
This paper describes a practical hardware implementation of uplink smart antenna system useful for macrocellular base stations. This system incorporates a fast DOA (direction of arrival) estimator which is called UMP (unitary MUSIC processor) using the dedicated circuit device of FPGA (field programmable gate array). This system steers the mainlobe for the user basically with the Dolph-Chebyshev beam. In order to avoid undesirable interference reception by broad mainlobe, an optional -steering processing cancels the interferers within the mainlobe coverage with notch beams which are pre-computed and stored in ROM (read only memory). The beamforming weight is computed by a simple convolution operation of the precomputed Dolph-Chebyshev beam and optional canceling beam, thus the computation load for weight generation is extremely small. This paper presents the estimation performance of the UMP through the hardware level fixed point simulation and measurements. And total performance evaluation of this system under AWGN and multipath fading channel with small angle spread is discussed.
Keywords :
AWGN channels; adaptive antenna arrays; array signal processing; beam steering; cellular radio; convolution; direction-of-arrival estimation; fading channels; field programmable gate arrays; interference suppression; multipath channels; signal classification; -steering processing; AWGN; Dolph-Chebyshev beam; FPGA; ROM; UMP; beamforming weight; convolution; direction of arrival estimator; estimation performance; fast DOA estimator; field programmable gate array; interference cancellation; macrocellular base stations; mainlobe coverage; multipath fading channel; notch beams; read only memory; real-time system; smart antenna system; undesirable interference reception; unitary MUSIC processor; AWGN; Base stations; Circuits; Direction of arrival estimation; Field programmable gate arrays; Hardware; Interference; Multiple signal classification; Read only memory; Real time systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
ISSN :
1090-3038
Print_ISBN :
0-7803-8521-7
Type :
conf
DOI :
10.1109/VETECF.2004.1399953
Filename :
1399953
Link To Document :
بازگشت