SDR Environment for Reconfigurable WCDMA & WiMAX Transceivers

Abstract

This chapter is basically the introduction of our project, its background, problem statement and the issues of the upcoming wireless standards and the difficulties in having the software defined radios (SDR) concept. It also includes description of the modules in which we have divided our project to accomplish the goals and meet the requirements of our project. 1.1. EVOLUTION OF WIRELESS TECHNOLOIES Wireless communication actually originates from the first radio transmission in 1895 although in ancient times communication was done through smoke signals etc. Wireless communications have seen its four generations which are described below: 1.1.1. First Generation First Generation mobile phones were analogue and were made for voice communication. They use frequency division multiple access (FDMA). Famous 1G cellular technology includes:  Advance Mobile Phone Systems (AMPS)  Nordic Mobile Telephone (NMT), &  Total Access Communication System (TACS). 1.1.2. Second Generation 2ND generation of mobile phones were digital. The multiple access techniques used in this generation of mobile phones are TDMA & CDMA. Initially they were made for voice communication but data communication was also added in it with the passage of time. They were built to enhance capacity, data rates and security as compared to the 1st generation cellular