MSW Signal-to-Noise Enhancers for Noise Reduction in DBS Reception

Abstract
The RF performance of MSW signal-to-noise enhancers is characterized by operational power level and frequency, frequency-selectivity, and transient response in MSW saturation. The frequency selectivity and transient response characteristics are especially important for noise reduction in frequency-modulated signals such as DBS reception signals. However, it is difficult to make both the characteristics good at the same time. In this paper three types of signal-to-noise enhancers with difference structures are discussed from the viewpoint of DBS application. We show that using an MSBVW/SW hybrid mode is an effective approach to lowering the operational frequency.