高速铁路无线信道测量与信道模型探讨

doi:10.3969/j.issn.1000-0801.2011.05.014

Abstract

Abstract:

The high-speed railway in China attracts the worldˊs attention.The wireless communication between the train and the ground has been one of the most top issues in industry and academe.The wireless is critical when designing channel communication system.In this paper,the related work on measurement and research,the recent proposals have been reviewed.Then the challenges of measurement and channel modeling in high speed scenario are presented such as the differences between various wireless coverage methods,the characteristics of wireless channel in overlapped cell field,channel reciprocity,non widesense stationary uncorrelated scattering（WSSUS）and birth-death propagation of multipath channel.

Key words: high speed railway, wireless channel, channel measurement, channel model

Liu Liu,Cheng Tao,Li Yu,Weihui Dong. Discussion on the Channel Measurement and Channel Model Under High Speed Railway Environment[J]. Telecommunications Science, 2011, 27(5): 54-60.

Figures/Tables 10

References 24

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参数	指标	参数	指标
频率	5.2 GHz	发射天线	车顶
带宽	120 MHz	接收天线	地面 UCA16
CIR长度	1.6 μs	速度	20、100、240 km/h

参数	指标	参数	指标
频率	5.2 GHz	发射天线	Dipole,2×8 ODA 车内，地面
带宽	50 MHz	接收天线	Dipole,2×8 ODA 车内，地面
发射功率	31 dBm	速度	260 ～290 km/h
CIR速率	2 050.5 Hz

参数	指标	参数	指标
频率	2.35 GHz	发射天线	Dipole车内
带宽	50 MHz	接收天线	Dipole地面
发射功率	5W（外接功放）	速度	240 km/h
CIR速率	1 968.5 Hz	码长	127

Tap	Channel A		Channel B		Doppler Spectrum
Tap	Relative Delay（ns）	Average Power（dB）	Relative Delay（ns）	Average Power（dB）	Doppler Spectrum
1	0	0.0	0	-2.5	Classic
2	310	-1.0	300	0	Classic
3	710	-9.0	8.900	-12.8	Classic
4	1 090	-10.0	12 900	-10.0	Classic
5	1 730	-15.0	17 100	-25.2	Classic
6	2 510	-20.0	20 000	-16.0	Classic

Tap Relative Delay（ns）		Relative Mean Power （dB）in TS25.104	Proposed Relative Mean Power（dB）for New High Speed Channel Model
1	0	0	0
2	260	-3	-1
3	521	-6	-4
4	781	-9	-9

Discussion on the Channel Measurement and Channel Model Under High Speed Railway Environment

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Figures/Tables 10

References 24

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参数		值
参数	场景1	场景2	场景3
D_s	1 000 m	-	300 m
D_min	50 m	-	2m
K	-	10 dB	-
υ	350 km/h	300 km/h	300 km/h
f_d	1 340 Hz	1 150 Hz	1 150 Hz

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