Optimization of Frequency-Shifted Reference UWB Technique in WPAN Technology

Abstract

A Promising kind of ultra wideband (UWB) radio technique called as Transmitted-Reference (TR) UWB scheme is being widely used in various network technologies such as sensor networks. However, despite the simplicity in the architecture of TR UWB receiver, it is still dogged by implementation concerns. In particular, TR UWB receiver requires a large wideband delay element which is difficult to implement into low power integrated systems. Another kind of UWB technique called as Frequency-Shifted Reference (FSR) UWB scheme has been introduced which avoids the delay element. In this FSR-UWB scheme, the frequency translation of a wideband signal is implemented rather than the delay element. In this paper, the performance of FSR UWB receiver in an AWGN channel has been evaluated. A high data rate frequency-shifted reference (FSR) UWB system and its performance in AWGN channel have been investigated. We have proposed a FSR-UWB system assuming lower frame length to obtain high data rates. We have investigated and analyzed this system which not only overcomes the drawback of analog time delay used in TR-UWB system by taking frequency offset but it also provides improved BER results for high data rate applications. Hence, in this way, it can be used further in WPAN environment.