By Topic

Neurofuzzy controller for closed loop power control of reverse link DS-CDMA system over Rayleigh fading channel

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

1 Author(s)
Wongsathan, C. ; Dept. of Electr. Eng, North-Chiang Mai Univ., Chiang Mai

This paper presents the direct sequence-code division multiple access (DS-CDMA) model and the strength based power control algorithm to control the power of reverse link DS-CDMA cellular system by using neurofuzzy controller (NFC). The radial basis function (RBF) network is implemented as an NFC. The controllerpsilas parameters are selected and adjusted on line by genetic algorithms (GAs). The controllerpsilas inputs are the error between the received power of each user (Pth) and the target (P*) at base station and the difference of this error. The controllerpsilas output is the increasing or decreasing power. The controller was then tested to control DS-CDMA model which designed in synchronous transmission. In the test, M sequence code used in spread spectrum was utilized under Rayleigh fading. The experimental results by comparing the operation characteristic of the designed and implement NFC and conventional power controller show that the NFC gives the power level tracked to the target and gives a lower outage probability and bit error rate (BER).

Published in:

Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2008. ECTI-CON 2008. 5th International Conference on  (Volume:1 )

Date of Conference:

14-17 May 2008