Title :
A sub-GHz mostly digital impulse radio UWB transceiver for wireless body sensor networks
Author :
Lei Wang ; Chun Huat Heng ; Yong Lian
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
This paper presents a mostly digital impulse radio (IR) UWB transceiver for low power wearable and implantable biomedical devices. The UWB transmitter adopts carrier-less pulse generator with on-off keying (OOK) modulation and uses an 11-bit Barker code for reliable communication in the frequency range of 0-960 MHz. The receiver is based on auto-threshold detection and operates intermittently for better power efficiency. The timing window for incoming data is provided by a delay locked loop (DLL) to re-time the receiver clock to the incoming data. Fabricated in a standard 0.35 μm CMOS technology, the prototype chip achieves energy efficiency of 100 and 600 pJ/pulse for the transmitter and receiver, respectively.
Keywords :
CMOS integrated circuits; amplitude shift keying; body sensor networks; clocks; delay lock loops; digital radio; low-power electronics; prosthetics; pulse generators; radio transceivers; ultra wideband communication; Barker code; CMOS technology; OOK; UWB transmitter; autothreshold detection; carrier-less pulse generator; clock retiming circuit; delay locked loop; digital impulse radio UWB transceiver for wireless body sensor networks; energy efficiency; frequency 0 MHz to 960 MHz; implantable biomedical devices; low power wearable biomedical devices; modulation; on-off keying; power efficiency; size 0.35 mum; timing window; word length 11 bit; Clocks; Detectors; Energy efficiency; Radio transmitters; Receivers; Transceivers;
Conference_Titel :
VLSI Design, Automation, and Test (VLSI-DAT), 2013 International Symposium on
Conference_Location :
Hsinchu
Print_ISBN :
978-1-4673-4435-7
DOI :
10.1109/VLDI-DAT.2013.6533831
