Title :
The efficiency of FFH/CDMA systems in a mobile radio environment
Author_Institution :
Inst. for Commun. Technol., German Aerosp. Res. Establ., Wessling, Germany
Abstract :
The spectral efficiency of fast frequency hopping/code division multiple access (FFH/CDMA) systems for the uplink (mobile-to-base) in a mobile radio environment is treated. An asynchronous system, Reed-Solomon (RS) codes for error correction, a frequency selective channel, and noncoherent detection at the hard-limited combining receiver are considered. It is shown how the parameters of the RS code, of the M-FSK signaling scheme, and of the frequency hopping system have to be chosen in order to maximize the spectral efficiency for a bit error rate of 10-3. The best performance is obtained for systems with large values for M where M is the parameter of the M-FSK signaling scheme
Keywords :
Reed-Solomon codes; code division multiple access; error correction codes; error statistics; frequency hop communication; frequency shift keying; land mobile radio; radio spectrum management; telecommunication signalling; FFH/CDMA systems; M-FSK signaling; RS codes; Reed-Solomon codes; asynchronous system; bit error rate; code division multiple access; error correction; fast frequency hopping; frequency selective channel; hard-limited combining receiver; mobile radio; mobile-to-base; noncoherent detection; performance; spectral efficiency; uplink; AWGN; Communications technology; Frequency conversion; Frequency synthesizers; Land mobile radio; Multiaccess communication; RF signals; Radio transmitters; Reed-Solomon codes; Spread spectrum communication;
Conference_Titel :
Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-1825-0
DOI :
10.1109/ICC.1994.368849
