Scheduled System Maintenance on May 29th, 2015:
IEEE Xplore will be upgraded between 11:00 AM and 10:00 PM EDT. During this time there may be intermittent impact on performance. We apologize for any inconvenience.
By Topic

Multiuser detection for CDMA antenna array receivers using spatial equivalence classes

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Sweatman, C.Z.W.H. ; Dept. of Electron. & Electr. Eng., Edinburgh Univ., UK ; Mulgrew, B. ; Thompson, J.S. ; Grant, P.M.

The reverse link (mobile to base) of a cellular direct-sequence code-division multiple-access system is considered with the aim of increasing system capacity while avoiding system complexity. The capacity of a conventional (matched filter) receiver can be increased by employing sectorised antenna arrays or multiuser detection techniques. Results confirm that the potentially complex approach of beamforming followed by multiuser detection further increases capacity when the uplink transmissions are asynchronous for both additive white Gaussian noise channels and Rayleigh fading multipath channels. A method by which the computational cost of multiuser detection applied after beamforming can be significantly reduced without greatly affecting performance is proposed. Bit detection techniques based on partitioning the users into spatial equivalence classes by beamforming and then employing standard multiuser detection techniques within each class are investigated. Classes of users can be determined so that multiple-access interference terms corresponding to users in different classes are of little significance. These terms can be discarded before applying multiuser detection, thus reducing computation

Published in:

Communications, IEE Proceedings-  (Volume:147 ,  Issue: 2 )