caa a22 4500 477089054 CHVBK 20180405111511.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF02109334 doi (NATIONALLICENCE)springer-10.1007/BF02109334 Improved base station circular antenna array receiver for wireless CDMA systems [Elektronische Daten] [Tony Rouphael, J. Cruz] A Spatial interpolation technique for the upsampling of uniform circular arrays (UCAs), beyond spatial aliasing, is considered. The UCA interpolation algorithm is used as a preprocessing procedure in the reverse link to improve the performance of a cellular code division multiple access (CDMA) system. The motivation is to enhance the system's capacity and array resolution and reduce the fading and coupling effects with minimal receiver hardware and cost. At the base station, we propose to place the antenna elements uniformly on an imaginary circumference farther apart thanλ/2, whereλ is the free-space wavelength. The resulting UCA possesses superior resolution, less coupling effects than a corresponding UCA with the same number of elements and circumferential spacing less than or equal toλ/2, and possibly higher diversity gain. In order to increase the system's capacity and eliminate any spatial aliasing, we propose to interpolate the UCA to within the spatial Nyquist rate. This is achieved by placing a virtual antenna element halfway on the circumference between every two adjacent antenna elements. Simulations results are provided to support our claims. Plenum Publishing Corporation, 1996 Antenna arrays nationallicence CDMA nationallicence array interpolation nationallicence Rouphael Tony Mass Storage Group, Systems Laboratory California (SLC), Philips Semiconductors, Sunnyvale, California aut Cruz J. School of Electrical Engineering, The University of Oklahoma, 202 W. Boyd, Room 219, 73109, Norman, Oklahoma aut International Journal of Wireless Information Networks Kluwer Academic Publishers-Plenum Publishers 3/4(1996-10-01), 187-194 1068-9605 3:4<187 1996 3 10776 https://doi.org/10.1007/BF02109334 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02109334 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rouphael Tony Mass Storage Group, Systems Laboratory California (SLC), Philips Semiconductors, Sunnyvale, California aut NATIONALLICENCE 700 1- Cruz J. School of Electrical Engineering, The University of Oklahoma, 202 W. Boyd, Room 219, 73109, Norman, Oklahoma aut NATIONALLICENCE 773 0- International Journal of Wireless Information Networks Kluwer Academic Publishers-Plenum Publishers 3/4(1996-10-01), 187-194 1068-9605 3:4<187 1996 3 10776 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer