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Study of Transmitted Reference, Frequency- Shifted Reference and Code-Shifted Reference UWB Receivers

K. Harisudha, Souvik Dinda, Rohit Kamal, Rahul Kamal

Ultra wideband (UWB) is based on transmission with very short pulses of low energy. The use of UWB technology will increase in the fields of wireless communication in the near future. The wider bandwidth of UWB technology has several advantages such as excellent penetration ability, multi-user support and high channel capacity. UWB has many applications due to its low power consumption, low cost and low interference. UWB poses design challenges for low power and low complex systems at wider bandwidth. For digital systems, it also requires high sampling rate and intensive computation to estimate gain and delay of multipath channel. In this paper, the performance of non-coherent transmitted reference (TR), frequencyshifted reference (FSR) and code-shifted reference (CR) systems are compared with the Wa l s h coded reference (CR) systems for single and multi-user for low data rates. The results show that CR shows better performance than TR a nd FS R i n b o t h s i ng l e us e r a nd mu l t i us e r e n vi r o nme nt .