9.5～10.5 GHz频段室内离体信道的测量与建模

doi:10.11959/j.issn.2096-3750.2022.00263

Abstract

Abstract:

In order to explore the wireless propagation characteristics of high-frequency indoor off-body channel, off-body channel measurements were carried out on multiple typical indoor scenes in the 9.5～10.5 GHz frequency band.In terms of large-scale fading, through studying the path loss, it is found that the human body occlusion factor has a sine function relationship with the rotation angle, and a negative exponential relationship with the distance between the receiver and transmitter.Therefore, a new type of off-body channel loss model related to distance and angle was established, and the accuracy and applicability of the new model was proved based on the shadow fading.In terms of small-scale fading, by analyzing the linear correlation between path loss and root mean square (RMS) delay spread, a new type of RMS delay spreading model related to distance and angle was obtained.It proves that the greater the distance between the antenna at the transceiver end and the occlusion factor caused by the rotation of the human body, the more severe the path loss and multipath fading.The new channel model can be used to design the off-body link of the internet of things environment body area network (BAN), providing a theoretical and practical basis for the future design of indoor wireless communication systems.

Key words: off-body channel measurement, path loss, RMS delay spread, multipath fading

CLC Number:

TN929.5

Shanhu HUANG, Jun SUN, Haofei CHANG, Wenjun LV, Qin YANG. Measurement and modeling of indoor off-body channel in the 9.5～10.5 GHz band[J]. Chinese Journal on Internet of Things, 2022, 6(2): 117-126.

Figures/Tables 20

人体部位	路损指数n	浮动截距β/dB	人体遮挡因子?(d,θ)	X_σ均值	X_σ标准差
腹部	2.17	46.65	$23.44 \exp (- 0.16 d) \sin (\frac{θ}{2})$	0.003	1.77
臀部	1.44	50.36	$16.47 \exp (- 0.03 d) \sin (\frac{θ}{2})$	-0.01	1.97
耳部	1.10	52.51	$11.30 \exp (- 0.02 d) \sin (\frac{θ}{2})$	0.07	2.33

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设备		参数
	型号	N5222B
	发送功率	15 dBm
VNA	测量频段	9.5～10.5 GHz
	测量带宽	1 GHz
	扫频点数	801
	发送端	类型	增益
天线		全向单极天线	5 dBi
	接收端	类型	增益
		全向单极天线	5 dBi
	发送端	损耗	长度
电缆		0.6dB/m	5m
	接收端	损耗	长度
		0.6dB/m	10 m

实际测量场景		路损指数n	浮动截距β/dB
	办公室	2.17	46.65
手持于腹部	会议室	1.97	46.89
	长廊	1.64	47.04

距离d/m	办公室	会议室	距离d/m	长廊
1.0	20.36	14.70	1.0	15.86
1.5	18.21	11.85	2.0	11.37
2.0	16.77	11.69	3.0	10.16
2.5	15.68	10.70	4.0	9.63
3.0	14.59	8.88	5.0	8.03
3.5	14.12	8.53	6.0	7.33
4.0	11.99	7.69	7.0	6.71
4.5	11.58	6.60	8.0	6.05
5.0	10.63	5.41	9.0	5.21

参数	办公室	会议室	长廊
A	23.44	17.84	16.65
B	0.16	0.22	0.14

场景	本文新型模型		传统加性模型
场景	X_σ均值	X_σ标准差	X_σ均值	X_σ标准差
办公室	0.003	1.77	0.002	2.42
会议室	0.02	1.26	0	2.94
长廊	0.002	1.58	-0.07	3.34

Measurement and modeling of indoor off-body channel in the 9.5～10.5 GHz band

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场景	相关系数	斜率k	截距t/ns	T_σ均值	T_σ标准差
办公室	0.92	0.46	-19.67	0.003	1.32
会议室	0.90	0.34	-12.78	-0.001	1.02
长廊	0.90	0.57	-25.63	-0.007	1.56

场景	N_k	A_k	B	T_k	X _k均值	X _k标准差
办公室	1.00	10.87	-0.16	1.79	0.004	2.26
会议室	0.67	6.07	-0.22	3.16	0.003	1.17
长廊	0.93	9.50	-0.14	1.18	-0.002	2.84