Title :
Different channel coding strategies for OFDM-CDMA
Author :
Stirling-Gallacher, R.A. ; Povey, G.J.R.
Author_Institution :
Dept. of Electr. Eng., Edinburgh Univ., UK
Abstract :
The performance of different channel coding schemes are presented for an OFDM-CDMA system. The different channel coding schemes are shown for a receiver using equal gain combining on the carriers in a multipath channel. As such the only information needed at the receiver is the phase of the sub-carriers. Two new channel coding schemes for OFDM-CDMA are presented, orthogonal and super orthogonal convolutional coding. These are compared against a 1/2 rate K=7 convolutional code and a 3/4 rate K=7 punctured convolutional code. A comparison is made of the spectral efficiency of the different coding schemes, the bandwidth required and the receiver complexity tradeoffs
Keywords :
channel coding; code division multiple access; convolutional codes; frequency division multiplexing; multipath channels; radio receivers; OFDM-CDMA; bandwidth; channel coding; code rate; equal gain combining; multipath channel; orthogonal convolutional coding; orthogonal frequency division multiplexing; punctured convolutional code; receiver complexity tradeoffs; spectral efficiency; sub-carriers phase; super orthogonal convolutional coding; Bandwidth; Channel coding; Convolution; Convolutional codes; Data communication; Diversity reception; Interference; Multiaccess communication; Multipath channels; OFDM;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.600448
