By Topic

A feedback adaptive space-time constant modulus algorithm in DS-CDMA multiuser detection

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)
Aigang Feng ; Inst. of Inf. Eng., Xi''an Jiaotong Univ., China ; Wu, Xiaojun ; Qinye Yin

The constant modulus property of communication signals, such as FM and phase-modulated signals, are often used in blind separation of multiple users. Because there are no training sequences needed, the system transmission efficiency is increased. When extended to the space-time domain, the new schemes have potentially greater performance than conventional ones. In this paper a feedback adaptive space-time constant modulus algorithm (FAST-CMA) is proposed for DS-CDMA multiuser detection. First the uplink channel model is built with receiving K synchronous communication signals that are transmitted through a MIMO-FIR channel. Based on this channel model, we compare and analyze the FAST-CMA with cascade-type constant modulus algorithm (CT-CMA) and space-time type constant modulus algorithm (ST-CMA). The FAST-CMA can combat both ISI and MAI without stringent power control and training sequence, and it is preferable to CT-CMA and approximately has the same performance as the ST-CMA. It has faster convergence rate, and less computational complexity than ST-CMA. Numerical simulations can illustrate the effectiveness of this algorithm

Published in:

Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th  (Volume:4 )

Date of Conference:

2001