MSW SIGNAL-TO-NOISE ENHANCERS FOR NOISE-REDUCTION IN DBS RECEPTION

The RF performance of MSW signal-to-noise enhancers is characterized b y operational power level and frequency, frequency-selectivity, and tr ansient response in MSW saturation. The frequency selectivity and tran sient response characteristics are especially important for noise redu ction in frequency-modulated signals such as DBS reception signals. Ho wever, it is difficult to make both the characteristics good at the sa me time. In this paper three types of signal-to-noise enhancers with d ifference structures are discussed from the viewpoint of DBS applicati on. We show that using an MSBVW/SW hybrid mode is an effective approac h to lowering the operational frequency.