Title :
An adaptive antenna array with parallel beamformers for indoor radio channel enhancement
Author :
Wang, Jian-Guo ; Mohan, Ananda S.
Author_Institution :
Sch. of Electr. Eng., Univ. of Technol., Sydney, NSW, Australia
Abstract :
A method for improving the performance of an uplink direct sequence code division multiple access (DS-CDMA) communication system for an indoor channel is presented. Spatially smoothed MUSIC is used to separate multipath within a chip duration. Angle and time diversity are realized using parallel beamformers with a RAKE receiver for reducing space and frequency selective fading. Three dimensional ray tracing is used for obtaining vector channel impulse response in a multiuser indoor environment incorporating perfect power control. Simulations are carried out inside a corridor of a multistorey building. Numerical results indicate that the proposed smoothed adaptive beamforming method obtains significant improvement in the channel capacity
Keywords :
adaptive antenna arrays; array signal processing; building; channel capacity; code division multiple access; direction-of-arrival estimation; diversity reception; fading; indoor radio; multipath channels; power control; pseudonoise codes; radio links; radio receivers; ray tracing; receiving antennas; smoothing methods; spread spectrum communication; telecommunication control; 3D ray tracing; DS-CDMA communication system; RAKE receiver; adaptive antenna array; angle diversity; channel capacity; chip duration; corridor; direct sequence code division multiple access; frequency selective fading; indoor radio channel enhancement; multipath; multistorey building; multiuser indoor environment; parallel beamformers; perfect power control; performance; simulations; smoothed adaptive beamforming method; space selective fading; spatially smoothed MUSIC; time diversity; uplink; vector channel impulse response; Adaptive arrays; Antenna arrays; Direct-sequence code-division multiple access; Fading; Frequency diversity; Indoor environments; Multiaccess communication; Multipath channels; Multiple signal classification; Ray tracing;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.596345
