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| A New Scheme for Adaptive Slot Structure in Mobile Communication Systems |
| Hua Jing-yu①; Ma Zhang-yong②; Gao Xi-qi①; You Xiao-hu① |
| ①National Communication Research Laboratory Southeast University Nanjing 210096 China;②Shanghai Kaiming Comm.Tech.Co; Ltd.,Shanghai 200000 China |
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Abstract 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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Received: 29 May 2003
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2005, Vol. 27 
