SDR based multiple access technique for multimedia applications

Software radio development aims at wideband RF access and software partitioning for plug-and-play type of use. The development is facilitated by progress in silicon capabilities, silicon capabilities, signal processing power of new and future processors and reconfiguration methods (software download, smartcards, etc.). The future wireless and multimedia systems differ from old systems and from each other in terms of access methods, modulation, coding, etc. and they will also provide new type of services. This results in need for many product platforms unless we aren´t able to design a common platform that could be programmed to different standards. The software radio is a good solution to this problem since it is reconfigurable to suit different standards at different continents. For this IS-95 CDMA technique is modified as a method of spread spectrum multiple access technique called frequency hopping/multiple carrier direct sequence-code division multiple access by Yang and Hanzo (2002) (FH/MC DS-CDMA). In this work, software defined radio (SDR) based FH/MC DS-CDMA transreceiver is proposed for future generation as well as existing generation Networks, which can carry multimedia applications at higher speed. Multiple carriers can be allotted as per user requirements with high secrecy and multiple encryptions. The performance analysis for the above scheme is shown supportive in terms of BER, power requirements, complexity, etc.