Title :
Generalized RAKE reception for cancelling interference from multiple base stations
Author :
Wang, Yi-Pin Eric ; Bottomley, Gregory E.
Author_Institution :
Ericsson Inc., Research Triangle Park, NC, USA
Abstract :
A generalized RAKE (G-RAKE) receiver structure is developed to suppress both own-cell and other-cell interference in the downlink of a CDMA system. Interference suppression is achieved by accounting for the interference coloration introduced by the dispersive channel. Compared to the conventional RARE receiver, this G-RAKE receiver may have more fingers and has different finger delays and combining weights. The performance in soft handoff is addressed, and the coding used in the IS-95 and IS-2000 systems is used to study the frame-error-rate (FER) performance. It is shown that with coding, the performance is more limited by other-cell interference than own-cell interference. By using the proposed G-RAKE receiver to suppress own-cell and other-cell interference, a gain of 1-2 dB can be achieved
Keywords :
cellular radio; code division multiple access; error statistics; interference suppression; multiuser channels; radio links; radio receivers; radiofrequency interference; spread spectrum communication; BER; CDMA system; DS-CDMA; FER performance; IS-2000 systems; IS-95 systems; coding; combining weights; dispersive channel; downlink; finger delays; frame-error-rate; generalized RAKE receiver structure; generalized RAKE reception; interference coloration; multiple base stations; other-cell interference suppression; own-cell interference suppression; soft handoff performance; Base stations; Delay; Downlink; Fading; Fingers; Interference cancellation; Interference suppression; Multiaccess communication; Multipath channels; RAKE receivers;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.883276
