By Topic

Return link code acquisition with DS-CDMA for high capacity multiuser systems under realistic conditions

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 $13
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

3 Author(s)
Reed, M.C. ; Nat. ICT Australia, ACT ; Hanlen, L.W. ; Corazza, G.E.

Acquisition of the code timing in a direct-sequence code-division multiple-access system at the base station must take place before signal detection and decoding is possible. Code acquisition under severe multiple access interference conditions with time varying codes makes the task even more difficult. Inefficient designs lead to large number of false alarms and/or missed detections. This paper details a realistic powerful code acquisition technique for the uplink of direct-sequence code-division multiple-access systems under high loaded situations, where the number of users is greater than the processing gain. Under this high multiple access interference condition the DS-CDMA acquisition problem becomes very difficult and conventional search methods simply fail. The method discussed utilises soft data from a multiuser detector to reduce the interference received by the acquisition unit. Numerical results validate performance under realistic conditions with amplitude, phase and frequency impairments

Published in:

Communications Theory Workshop, 2005. Proceedings. 6th Australian

Date of Conference:

2-4 Feb. 2005