Research of the Noise Immunity when Using the Fractional Frequency Reuse in the Mobile Satellite Service

摘要

The investigation of the directivity pattern side-lobe level impact of the concentric ring antenna arrays to noise immunity of the receiver when using fractional frequency reuse was provided. The concept of equivalent cluster dimension was introduced, which characterize the work of the spatially separated antenna beams working in combined channels. Demands on the side-lobe level of satellite transponder antenna arrays were described based on Signal Interference Noise Ratio.