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Volume 27 Issue 1
Jan.  2005
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Hua Jing-yu, Ma Zhang-yong, Gao Xi-qi, You Xiao-hu. A New Scheme for Adaptive Slot Structure in Mobile Communication Systems[J]. Journal of Electronics & Information Technology, 2005, 27(1): 90-94.
Citation: Hua Jing-yu, Ma Zhang-yong, Gao Xi-qi, You Xiao-hu. A New Scheme for Adaptive Slot Structure in Mobile Communication Systems[J]. Journal of Electronics & Information Technology, 2005, 27(1): 90-94.

A New Scheme for Adaptive Slot Structure in Mobile Communication Systems

  • Received Date: 2003-05-29
  • Rev Recd Date: 2003-11-04
  • Publish Date: 2005-01-19
  • A Single Carrier/Frequency Domain Equalization (SC/FDE) system with time multiplexed pilot channel is designed. In this system, the Doppler-shift of the time-varying multi-path channel is estimated by calculating the Level Crossing Rate (LCR) of the signal envelope with the channel coefficient estimation on the effective fingers. Based on the Doppler-shift estimation and its relationship with pilot sampling rate, the slot structure and the pilot density are adjusted adaptively, which ensure high system capacity and good receiving performance in a wide range of mobile velocities.
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  • Jakes W C. Microwave Mobile Communications. New York:IEEE Press, 1994,chapter 1.[2]Monk A M, Miltein L B. Open-loop power control error in a land mobile satellite system[J].IEEE J. on Selected Areas Comm.1995,13(2):205-[3]Cavers J K. An analysis of pilot symbol assisted modulation for Rayleigh fading channel. IEEE Trans. on VT, 1991, 40(4):683 - 693.[4]Sampath A, Holtzman J. Estimation of maximum Doppler frequency for handoff decisions. Proc. IEEE VTC., Secaucus, NJ,USA, 1993: 859- 862.[5]Xiao C, Mann K, Livier J. Mobile speed estimation for TDMA based hierarchical cellular systems. Proc. IEEE VTC.,Amsterdam, the Netherlands, 1999:2456 - 2460.[6]Ma Zhang-yong,Yan Yong-qing, Zhao Chun-ming,You Xiao-hu.An improved channel estimation algorithm based on estimation level crossing rate for CDMA receiver. Chinese Journal of Electronics, 2003,12(2): 235 - 238.[7]Kawabata K, Nakamura T, Fukuda E. Estimating velocity using diversity reception. Proc. IEEE VTC., Stockholm, Sweden, 1994:371 - 374.[8]Negi R, Cioffi J. Pilot tone selection for channel estimation in a mobile OFDM systems[J].IEEE Trans. on Consum..Electron.1998,44(8):1122-[9]Zhou B. Mobilevelocity estimation in multipath fading channels,[M.Sc. Thesis], Queens University, Canada.
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