Title :
Adaptive rate coding for wideband CDMA wireless networks
Author :
Bhaskar, Vidhyacharan ; Joiner, Laurie L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Alabama Univ., Huntsville, AL, USA
Abstract :
One method of optimizing throughput for a wireless system while maintaining a certain level of performance is to design the error control system so that it offers two or more different rate codes. The system uses channel-state information to determine which of the various codes should be used at any given moment. In order to minimize system complexity, the same encoder and decoder are used for the different rate codes. This paper presents a method of comparing the performance of the system for different rate convolutional codes. The results show the optimal code rate for various channel conditions and the gain in throughput by using adaptive rate codes in a wideband CDMA system
Keywords :
AWGN channels; adaptive codes; broadband networks; code division multiple access; computational complexity; convolutional codes; error statistics; multiuser channels; parameter estimation; radio networks; spread spectrum communication; AWGN channel; BER; DS-CDMA; adaptive rate codes; adaptive rate coding; additive white Gaussian noise channel; channel conditions; channel estimation; channel-state information; convolutional codes; decoder; encoder; error control system; optimal code rate; system complexity minimization; system performance; throughput; throughput optimization; wideband CDMA system; wideband CDMA wireless networks; wireless system; AWGN; Bandwidth; Bit error rate; Convolutional codes; Decoding; Error correction; Multiaccess communication; Throughput; Wideband; Wireless networks;
Conference_Titel :
Southeastcon 2000. Proceedings of the IEEE
Conference_Location :
Nasville, TN
Print_ISBN :
0-7803-6312-4
DOI :
10.1109/SECON.2000.845614
