Title :
Forward link capacity limit of coded FFH/CDMA multiuser mobile radios
Author :
Kawahara, T. ; Matsumoto, T.
Author_Institution :
NTT Radio Commun. Syst. Lab., Kanagawa, Japan
Abstract :
The theoretical limit of the forward link (base to mobile) user capacity of fast frequency hopping code division multiple access (FFH/CDMA) mobile communication systems with error correction coding is investigated. The channel cutoff rate of coded FFH/CDMA channels is calculated and the optimal code rate that maximises the user capacity is determined. It is shown that with deletion-free transmission, the frequency efficiency of an FFH/CDMA channel coded at the optimal code rate is 47% higher than without coding.
Keywords :
code division multiple access; error correction codes; frequency agility; mobile radio systems; radio links; channel cutoff rate; coded FFH/CDMA multiuser mobile radios; deletion-free transmission; error correction coding; fast frequency hopping code division multiple access; forward link capacity limit; frequency efficiency; mobile communication systems; optimal code rate; user capacity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19911191
