Design of Future Software Defined Radio (SDR) for All-IP Heterogeneous Network

The software defined radio (SDR) is the heart of the 4G mobile communication to access any network at any time basis. The different wireless networks such as cellular, codeless, wireless local area network (WLAN) having different band of frequency requires individual software to access any call. The SDR device requires more antennas and low noise amplifier (LNA) because it is impossible for single antenna and single band pass filter to operate at all the frequency bands. Large number of antennas, filter and amplifier increased the size of the device. The SDR scan the available network and download the required software from WLAN, memory card, PC server etc. The downloading creates some problem, such as the limited download speed and its reliability. In this paper, the authors study the architecture of SDR based on the recently proposed CI-OFDM multiplexing technique to operate all networks in a particular band-width. We also find the interference among different CI channels of the same and different networks. Finally, we discuss the calling procedure between one user of one network and another user under another network using IP address.