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A Simple Asynchronous UWB Position Location Algorithm Based on Single Round-Trip Transmission
YANG, Suckchel,KANG, Dongwoo,NAMGOONG, Young,SHIN, Yoan The Institute of Electronics, Information and Comm 2008 IEICE transactions on fundamentals of electronics, Vol.91 No.1
<P>We propose a simple asynchronous UWB (Ultra Wide Band) position location algorithm with low complexity, power consumption and processing delay. In the proposed algorithm, only a single RTTX (Round-Trip Transmission) of UWB pulses is utilized based on the ToA (Time of Arrival) principle. Hence, the proposed algorithm decreases power consumption and processing delay as compared to the basic ToA based on triple RTTXs. Moreover, unlike the TDoA (Time Difference of Arrival) algorithm, the proposed algorithm can perform the position location with low complexity since it does not require strict synchronization between multiple beacons. Simulation results using IEEE 802.15.4a UWB channel models reveal that the proposed algorithm achieves closely comparable position location performance of the basic ToA and TDoA algorithms.</P>
Adaptive discontinuous reception mechanism for power saving in UMTS
Suckchel Yang,Myungsik Yoo,Yoan Shin IEEE 2007 IEEE communications letters Vol.11 No.1
<P>We propose the ADRX (adaptive discontinuous reception) mechanism with the EPI (extended paging indicator) for power saving in the UMTS (Universal Mobile Telecommunications System). In the proposed mechanism, DRX period for each UE (user equipment) is individually and adaptively controlled by the EPI which is decided by node B considering the current traffic situation of each UE. Simulation results show significant improvement of power saving performance by the proposed mechanism as compared to the conventional fixed DRX</P>
A Noncoherent UWB Communication System for Low Power Applications
Suckchel Yang,Jung-wan Park,Yong Moon,Won Cheol Lee,Yoan Shin 대한전자공학회 2004 Journal of semiconductor technology and science Vol.4 No.3
In this paper, we propose a noncoherent On-Off Keying (OOK) Ultra Wide Band (UWB) system based on power detection with noise power calibration for low power applications. The proposed UWB system achieves good bit error rate performance which is fayorably comparable to that of the system using the ideal adaptive threshold, while maintaining simple receher structure. In addition, low power Analog Front-End (AFE) blocks for the proposed noncoherent UWB transceiver are proposed and verified using CMOS technology. Simulation results on the pulse generator, delay time generator and I-bit Analog-to-Digital (AID) converter show feasibility of the proposed UWB AFE system.<br/> Index terms-Ubiquitous networks, Low power, UWB (Ultra Wide Band), OOK (On-Off Keying), Noncoherent detection, Nobe power calibration, AFE (Analog Front-End), Impulse generator, S/H (Sample-and-Hold), A/D converter<br/>