Design considerations of aK-band (30/20 GHz) mobile earth station for a domestic satellite communications system are described. A Japanese Medium Capacity Communication Satellite which utilizesKandCsatellite communication bands was considered for the system design. Transmitting power control method, statistical link quality estimation, and equipment description are given.

A proposed scheme for differential detection of MSK with nonredundant error correction utilizes the output detected from the difference in phase between alternate signaling intervals, along with the output of the conventional differential detector, in accordance with the concept of a convolutional error correcting code. Theoretical analysis and experimental results show that the degradation from coherent detection is about 0.1 dB at a 10 dB signal-to-noise ratio.