Measurement and Feasibility in 5G Mid-Band

• Main Authors: Po-Chuan Chen, 陳柏全
• Other Authors: Ding-Bing Lin
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/q4w3er

碩士 === 國立臺灣科技大學 === 電子工程系 === 106 === We have completed the measurement and feasibility assessment of the usage in 5G mid-band and provided complete analysis results. Through the NTU Spectrum Observatory System, the team conducted a full-time data collection and analysis for the Extended C-band used by the ST-2 satellite in the frequency bands from 3400 to 4200 MHz to study the usage and interference of the ST-2. The tests were done under the NLOS (Non-Line-Of-Sight) environment with off-axis angles of 50°, 53°, and 71°, respectively, between the interference source and the FSS (Fixed Satellite Service) ground station. The measurement results show that with adjacent-frequency interference, when the carrier-to-noise (C/N) ratio is greater than 11dB, no interference occurs. Under the LOS (Line-Of-Sight) environment with an off-axis angle of 68°, the same-frequency interference tests were conducted from 3655 MHz to 3659 MHz. Measurement results show that the interference is serious. We used the iv protection distance method in the coexistence environment between the small cell base station and the FSS system to suppress possible interference problems when the small cell base station coexists with the FSS system. According to the theoretical data analysis, it can be calculated that when the interference power is the maximum, the same-frequency interference protection distance of the small-cell base station to the FSS ground station is suppressed.