radiowaves

Wireless Communication System and standard

GSM services: – tele services, voice calls – bearer or data services – supplementary services, call holding, call waiting, call forwarding, multi party call conferencing GSM architecture: – MS Mobile station, consists of mobile equipment and subscriber identity module – BSS, base station subsystem, consists of base station transreceiver and base station controller -NSS, network […] Read more»

radiowaves

Introduction to GSM

  GSM stands for Global System for Mobile Communication. – 1991 first GSM network launched – 1992 european GSM network turn commercial – 1994 data transmission capabilities launched SYSTEM ARCHITECTURE: – hierarchically structured – consists of one administrative region, which is assigned to a MSC. – Each administrative region is made up of at least […] Read more»

radiowaves

Error Control codes for GSM

Uses: – Block codes to generate parity bits for error detection – Convolutional code for error correction – Interleaving for burst error correction —->   Block code    ———->    Convolutional code    ———–> Interleaving Read more»