J. Phys. IV France 07 (1997) C1-387-C1-390
MSW Signal-to-Noise Enhancers for Noise Reduction in DBS ReceptionT. Nomoto and T. Kuki
NHK Science and Technical Research Laboratories, 1-10-11 Kinuta, Setagaya-ku, Tokyo 157, Japan
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.
© EDP Sciences 1997