Coexistence Study for the 410-430MHz IMT band in Colombia

The deployment of 5G services varies across the globe, in Europe, Asia, and North America have seen the most significant deployment, while some Latin American countries are still in the process. This review examines the regulations related to radio frequency bands and analyzes ways to optimize radio space in the 2300-2400 MHz band in Colombia. The findings and recommendations serve as a reference for similar countries in Latin America. Based on the results, it is recommended to maintain a minimum distance of 100 meters between IMT base stations and Bluetooth and ZigBee systems. For WiFi, it is advisable to use channels higher than 5 or ensure a separation of at least 1 kilometer. Indoors, no special attention is required due to wall attenuation. A separation of around 5 MHz is necessary between the two bands in laboratory tests. This ensures that the interference effects of IMT towards WiFi or vice versa stay within the acceptable limits of PER. The guard band should be established with respect to the LTE signal, which is the most restrictive case, and serves as the reference signal. In connection with band 40 of LTE, the guard band will be 0.6 MHz and 0.8 MHz with respect to the WLAN signal