Ultra Wideband Wireless Body Area Networks by Kasun Maduranga Silva Thotahewa Jean-Michel Redouté & Mehmet Rasit Yuce

Author:Kasun Maduranga Silva Thotahewa, Jean-Michel Redouté & Mehmet Rasit Yuce
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

4.3 UWB Receiver Design Techniques

Due to the short pulse width and low power of the signal, front-end circuitry for the UWB receiver is complex in design and has high power consumption. An Analog to Digital Converter (ADC) in a UWB receiver requires a large input bandwidth and a high sampling rate. For example ADC12D1800 [17] by National Semiconductors has 3.5 Giga samples per second sampling rate and an input bandwidth of 1.75 GHz, but it consumes 4.4 W of power which is not suitable for battery powered UWB sensor design. Although the ADC has been brought close to the antenna with the evolution of the front-end circuitry for narrow band systems, it is not considered as a suitable technique for UWB systems. The fully digital implementations of the UWB receivers require precise synchronization of nano-second scale narrow UWB pulses and resolving numerous multipath components of the received UWB signals [18].

UWB receivers are of two types: non-coherent receivers and coherent receivers. These two receiver architectures are discussed in following sections.

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