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Small-Scale Characteristics of 45 GHz Based on Channel Measurement

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Presentation on theme: "Small-Scale Characteristics of 45 GHz Based on Channel Measurement"— Presentation transcript:

1 Small-Scale Characteristics of 45 GHz Based on Channel Measurement
March 2014 Small-Scale Characteristics of 45 GHz Based on Channel Measurement Date: September 21, 2018 Presenter: Haiming WANG Authors/contributors: Name Company Address Phone Haiming WANG SEU/CWPAN 2 Sipailou, Nanjing , China (ext.) Jin ZHU Wei HONG Nianzu ZHANG (ext.) Shiwen HE (ext.) Haiming Wang, et al. (SEU/CWPAN)

2 March 2014 Abstract This presentation gives small-scale characteristics of 45 GHz band based on channel measurement. Haiming Wang, et al. (SEU/CWPAN)

3 Outline Channel Measurement Scheme
March 2014 Outline Channel Measurement Scheme Transmission Scenarios Channel measurement setup Small-Scale Characteristics at 45 GHz band Number of clusters and rays Power delay profile Angle of arrival and departure Time of arrival Haiming Wang, et al. (SEU/CWPAN)

4 Transmission Scenarios
March 2014 Transmission Scenarios Conference room Cubicle room Living room Haiming Wang, et al. (SEU/CWPAN)

5 Conference Room Scenario Setup
March 2014 Conference Room Scenario Setup Tx height: 1.95m Rx height: 1.00m Fixed Tx position and 4 Rx positions Tx height: 10 dBm Freq center: GHz Sampling frequency: 660 MHz Number of Subcarriers: 256 Haiming Wang, et al. (SEU/CWPAN)

6 Channel Measurement Setup
March 2014 A PC is used to not only control the rotary table with an RS-232 port but also control the signal generator and vector network analyzer (VNA) with LAN ports. The signal generator transmits CW signal at each frequency, then Rx power and channel frequency response are obtained by the VNA. The positions of Tx and Rx antennas and measured data are simultaneously recorded. Haiming Wang, et al. (SEU/CWPAN)

7 Antennas for Channel Measurement
March 2014 Antennas for Channel Measurement Type I: Horn antenna with 23.7-dBi gain Angle (degree) Pattern (dB) H-Plane E-Plane Type II: Open-ended waveguide (OEW) antenna with 6-dBi gain Haiming Wang, et al. (SEU/CWPAN)

8 Antennas for Channel Measurement
March 2014 Antennas for Channel Measurement Type Ⅲ: SIW antenna with 3-dBi gain Three antennas are linear polarized Gain Angle (deg) Maximum Gain Haiming Wang, et al. (SEU/CWPAN)

9 Channel Measurement Technique
March 2014 Channel Measurement Technique Frequency domain measurement Complex response is recorded in the frequency domain Channel impulse response is obtained from channel frequency response using IFFT Haiming Wang, et al. (SEU/CWPAN)

10 Double-directional Scanning
March 2014 Double-directional Scanning Horn-Horn: Tx antenna rotates at each 10 degrees, Rx antenna rotates at each 10 degrees OEW-OEW: Tx antenna rotates at each 60 degrees, Rx antenna rotates at each 60 degrees Haiming Wang, et al. (SEU/CWPAN)

11 The Channel Impulse Response Function
March 2014 The Channel Impulse Response Function and are the gain and channel impulse response of the ith cluster respectively; Amplitude, delay and angle characteristics of clusters as well as rays can be derived from massive channel measurements. 𝐴 𝑖 𝐶 𝑖 Haiming Wang, et al. (SEU/CWPAN)

12 Power Angle Profile (PAP)
March 2014 Power Angle Profile (PAP) Haiming Wang, et al. (SEU/CWPAN)

13 March 2014 PAP at Rx 1 Position Sub-paths whose average power 20dB less than the max path power are ignored Power of each sub-path is the expectation of powers of 256 sub-carriers (a) Average power of each angle (b) Delay of each angle Haiming Wang, et al. (SEU/CWPAN)

14 March 2014 PAP at Rx2 Position Sub-paths whose average power 20dB less than the max path power are ignored Power of each sub-path is the expectation of powers of 256 sub-carriers (c) Average power of each angle (d) Delay of each angle Haiming Wang, et al. (SEU/CWPAN)

15 PAP at Rx 3 Position March 2014 (e) Average power of each angle
(f) Delay of each angle Haiming Wang, et al. (SEU/CWPAN)

16 PAP at Rx 4 Position March 2014 Rx2 (g) Average power of each angle
(h) Delay of each angle Haiming Wang, et al. (SEU/CWPAN)

17 March 2014 Discussion Amount to 36×36 (1296) sub-channels are measured to analyze the spatial characteristics of clusters. The left illustration shows the average power of each path, the right illustration shows the corresponding delays of all paths. Clustering is obvious and there are about 6 or more clusters . Cluster with larger power usually has smaller time delay. Haiming Wang, et al. (SEU/CWPAN)

18 Power Delay Profile (PDP)
March 2014 Power Delay Profile (PDP) Haiming Wang, et al. (SEU/CWPAN)

19 PDP of Horn-Horn Rx1 Rx2 Rx3 Rx4 March 2014
Haiming Wang, et al. (SEU/CWPAN)

20 PDP of OEW-OEW Rx1 Rx2 Rx3 Rx4 March 2014
Haiming Wang, et al. (SEU/CWPAN)

21 March 2014 Discussion There is no LoS path component in the horn scanning setup for a misalignment of TR antennas while in OEW scanning setup there is no such effect. The first ray arrives at about 10ns as radio propagation when there is LoS component. The LoS component is of much significant comparing the reflection and scattering components. Haiming Wang, et al. (SEU/CWPAN)

22 March 2014 Future Work Continue the small-scale channel measurement in other two transmission scenarios. Extract the distribution of parameters and finish the channel models based on channel measurement. Set up MIMO channel measurement and derive the relative correlation matrix. Give the Matlab code of channel generation at 45 GHz band. Haiming Wang, et al. (SEU/CWPAN)

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