The third generation mobile communication systems?s development and radio load strategies

Mobile Communication systems began with analog communication technology as first generation. Since the first generation mobile communication systems serve only voice-based service, there had been some problems with the service quality. Second generation communication systems (2G) had taken place because of these problems. Beside voice, second generation communication systems has digital mobile communication technology which presents the possibility to low rate data transmission. Because of insufficiency in low rate data transmission, 2.5 generation (2.5G) system had been developed temporarily.2.5 Generation serves higher rate of data transmission compared with 2G. GPRS and EDGE technology reaches to a maximum value of 59.2Kbps rate in 2.5G. Third generation (3G) wideband communication systems had been developed after the 2.5 G system, which serves higher rate of voice and data transmission and which makes it possible to use both time and frequency. The biggest advantage of the the third generation (3G) wideband communication systems is the ability of transmitting both the voice and image data?s in secure and with high rates by determined codes. Data rate reaches to a value of 384Kbps/2Mbps with 5 MHz of bandwidth in wideband communication systems.In this thesis, the development of mobile communication systems, the air interface of W-CDMA technique in third generation wideband mobile communication systems, physical layer performance, calculation of UMTS spreading and despreading, radyo resource management, 3GPP performance requirements and enhancements, uplink-downlink performance analysis and calculations have been studied.