Browse > Article
http://dx.doi.org/10.5762/KAIS.2018.19.7.24

Link Adaptation Method of the Block Coded Modulation for UWB-IR  

Min, Seungwook (Department of Computer Science, Sangmyung University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.7, 2018 , pp. 24-35 More about this Journal
Abstract
In wireless communications environments, a link adaptation technique that selects the proper rate from among several transmission rates is adopted to cope with variations in channel status. In block coded modulation, the frame time and/or the block length can be adjusted to the channel status. A smaller frame time can cause inter-frame interference (IFI), however, a larger frame time can reduce the data rate. Therefore, frame time is the design factor decided by a tradeoff between performance and the data rate. This paper presents a method to determine the frame time based on the processing gain for the channel model, CM1~CM4, recommended by IEEE 802.15a. Also, a link adaptation technique for block coded modulation is proposed for efficient communications by varying the frame time and the block length. Through simulation, link adaptation can be carried out with a step size of 2~5 nsec in a frame time range of 14~ 50 nsec for channel models CM1~CM4.
Keywords
UWB-IR (Ultra Wide Band-Impulse Radio); IFI (Inter Frame Interference); Channel Model; BCM (Block Coded Modulation); Processing Gain;
Citations & Related Records
연도 인용수 순위
  • Reference
1 S. Nagaraj and F. Rassam, "Improved Noncoherent UWB Receiver for Implantable Biomedical Devices," IEEE Trans. Biomedical Eng., vol. 63, pp. 2220-2225, 2016. DOI: https://doi.org/10.1109/TBME.2015.2511538   DOI
2 Y. Ying, M. Ghogho, and A. Swami, "Block-coded modulation and noncoherent detection for impulse radio UWB," IEEE Signal Process. Letters, vol. 15, pp. 112- 115, 2008. DOI: https://doi.org/10.1109/LSP.2007.910307   DOI
3 H. Gao, et al, "IFI and ISI Premitigation for Block-Code-Modulated Noncoherent UWB Impulse Radio: A Code Optimization Approach," IEEE Trnas. Vehicular Tech., vol. 61, no. 4, pp. 1635-1648, May 2012. DOI: https://doi.org/10.1109/TVT.2012.2187938   DOI
4 S. Min, "Efficient Receiver Design Based On Block-Coded Correlator Scheme for UWB-IR," Journal of KAIS, vol. 16, no. 11, pp. 7582-7588, 2015. DOI: https://doi.org/10.5762/KAIS.2015.16.11.7582
5 D. Qiao, et al, "Goodput analysis and link adaptation for IEEE 802.11a wireless LANs," IEEE Trans, Mobile Computing, pp. 278-292, 2002. DOI: https://doi.org/10.1109/TMC.2002.1175541
6 D. Mu, et al, "Performance Analysis of UWB Noncoherent Receiver with Block-Coded Modulation Scheme," IEEE Communications Lettrers, vol. 14, no. 6, pp. 509-511, June 2010. DOI: https://doi.org/10.1109/LCOMM.2010.06.100102   DOI
7 J. Foerster, Channel Modeling Subcommittee Final Rep. (doc.: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs), Feb. 2002.
8 K. Witrisal and M. Pausini, "Statistical analysis of UWB channel correlation funtions," IEEE Trans. Veh. Technol., vol. 57, no. 3, pp. 1359-1373, May 2008. DOI: https://doi.org/10.1109/TVT.2007.907008   DOI