Methods for improving intersystem EMC for the fourth generation mobile communications systems

The intersystem and electromagnetic compatibility (EMC) systems of the fourth generation (4G) LTE (FDD, TDD) and McWiLL are considered. It has been established that the main source of out-of-band emissions is combinational products. Several options have been proposed for providing 4G EMC networks including band-pass filtering which allows reducing the guard frequency interval (GFI) between LTE systems to 1.4 MHz. Taking into account the features of McWiLL considered various combinations of electromagnetic effects on the elements of the system and the elimination of interference by spatial separation and orientation settings of the radiation pattern of the antenna. The possibility and conditions of teamwork at the GFI equal to 2.5 MHz is shown. The increase in the noise immunity of systems associated with the technique of space-time signal processing in antenna systems of base stations (BS) used in the McWiLL network and allowing to suppress directional interference from other networks is calculated.

Download in .pdf