In order to ensure the leading level of 5G network, the 2.6GHz frequency band is given priority to adopt the 100MHz networking solution design, which coincides with the operating frequency of the deployed TD-LTE system in the D1/D2 frequency band. In areas where TD-LTE frequency bands have not been cleared in the D1/D2 frequency band, 5G will encounter serious technical problems with LTE co-channel interference. In addition, according to the summary of 5G interference technology examples, 5G in the 2.6GHz frequency band will also encounter interference technology from the multi-channel microwave distribution system (MMDS) of the radio and television network, interference technology from video surveillance network transmission equipment, and pseudo base stations. Jamming technology and jammer jamming technology, etc. Therefore, studying and identifying 5G interference problems is of great practical significance to promote 5G interference technology to solve problems and ensure customer experience and business process understanding. signal jammer
1. LTE co-channel interference
In areas where TD-LTE in the D1/D2 frequency band has not been cleared, under long-term load conditions in TD-LTE residential areas, terminal equipment will cause increased co-channel interference in the same covered 5G residential areas, seriously affecting the characteristics of 5G Internet. The strength of LTE co-channel interference is closely related to factors such as the size of the covered area, the wireless network environment, and the traffic volume of LTE adjacent areas.
The main characteristics of LTE co-channel interference are that the 163~273PRB noise floor used in the D1/D2 frequency band increases significantly in the time domain, and the wave pattern characteristics show characteristics that are relatively highly related to the production scheduling optimization algorithm; in the frequency domain, the 24h interference immunity The pressure intensity fluctuates significantly with the freight volume and the trend analysis is basically consistent, showing significant frequency domain uncertainty.
2. MMDS interference
The multi-channel microwave distribution system (MMDS) uses microwave heating frequency to transmit at one point and receive at more points to transmit television, audio broadcast programs and data signals to the front or directly of each cable digital television public antenna television system. Microwave heating system software assigned to individual customers. According to the MMDS transmission configuration in my country, MMDS operating in the 2500-2700MHz frequency range will cause serious interference to the 5G system deployed in the 2.6GHz frequency band. The interference is characterized by several regular continuous 8MHz networks. Bandwidth Rectangular Box Interference Technology Wave Pattern.
