Title :
Capacity increase in the downlink of spread spectrum systems through joint signal precoding
Author :
Barreto, André Noll ; Fettweis, Gerhard
Author_Institution :
IBM Zurich Res. Lab., Ruschlikon, Switzerland
Abstract :
In this paper we propose two precoding schemes for the downlink of CDMA systems which help reduce the multiuser interference by jointly precoding the transmitted signal based on knowledge of the downlink channel. These methods provide a substantial capacity increase without requiring complex multiuser detectors at the mobile terminals and can be applied for instance to TDD systems, which have symmetrical channels
Keywords :
cellular radio; channel capacity; code division multiple access; combined source-channel coding; interference suppression; multiuser channels; radiofrequency interference; spread spectrum communication; time division multiplexing; CDMA; DS-CDMA; TDD systems; TDM; capacity; downlink; joint signal precoding; multiuser interference; spread spectrum systems; symmetrical channels; transmitted signal; Base stations; Channel state information; Downlink; Interference; Mobile communication; Multiaccess communication; Multipath channels; Multiuser detection; Spread spectrum communication; Transmitters;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.936841
