Title :
Reed-Solomon coding and GMSK modulation for digital cellular packet data systems
Author :
Kamali, Behnam ; Brinkley, Ronald L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Mercer Univ., USA
Abstract :
The structure of a digital cellular packet data (CDPD) network is briefly explained with the aid of a general block diagram. The air-interface represents the most error-prone portion of the CDPD network. To protect user´s data, CDPD employs Reed-Solomon (RS) codes. RS codes and their single burst error correcting capabilities are described. A parameter that measures how efficiently the random error correcting capability of an RS code is used to correct a single burst of errors is introduced. Tables of single burst error correcting capabilities of RS codes constructed over GF(64) and GF(256) are given. It is shown that in order to provide signal robustness against 2.2 millisecond of mean fade-duration-time, a (63,47) RS code is required. The modulation scheme used in CDPD networks is required to be both bandwidth and power efficient. It is shown that GMSK with BT=0.5 satisfies all the CDPD network requirements
Keywords :
Galois fields; Reed-Solomon codes; cellular radio; data communication; digital radio; error correction codes; land mobile radio; minimum shift keying; packet radio networks; (63,47) RS code; CDPD network; GF(64); GMSK modulation; RS codes; Reed-Solomon coding; air-interface; digital cellular packet data networks; mean fade-duration-time; random error correcting capability; signal robustness; single burst error correcting capability; Bandwidth; Cellular networks; Data engineering; Data systems; Digital modulation; Error correction codes; Military computing; Modulation coding; Reed-Solomon codes; Telephony;
Conference_Titel :
Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC, Canada
Print_ISBN :
0-7803-3905-3
DOI :
10.1109/PACRIM.1997.620367
