Difference between slow and fast frequency hopping pdf

Frequency-Hop Spread-Spectrum Communications. Signals with very large RF bandwidths can be generated by a Slow FH spread-spectrum systems have hopping rates that are smaller than the data rate, and thus the The ability to withstand interference is different between the two techniques. The terms slow and fast fading refer to the rate at which the magnitude and phase change imposed by the The difference in Doppler shifts between different signal components contributing to a signal Frequency-selective fading channels are also dispersive, in that the signal energy associated with With slow hopping, the interference reductions are slight. A narrowband radio being interfered with will experience a pop or burst of noise when the If there are a lot of asynchronous FH radios using different hop sets in a given band, the overall effect is to spread out the energy over the whole band. frequency hopping occurs faster than the modulation. A fast FH/MFSK system differs from a slow FH/MFSK minimum separation between adjacent hopping frequencies is 2????????? . Fig. Although fast frequency hopping is more difficult to implement, offers some advantages over slow Frequency Hopping Spread Spectrum Technique is widely used in Communications. 13. Difference between Slow & Fast FH-SS SLOW FAST In this case one or more data bits are transmitted within one Hop. One data bit is divided over multiple Hops. Slow Frequency Hopping (SFH) In this case one or more data bits are transmitted within one hop. An advantage is that coherent data detection is possible. Fast Frequency Hopping (FFH) One data bit is divided over multiple hops. In fast hopping, coherent signal detection is difficult, and seldom used. The difference between slow and fast metabolism is how many calories you burn to support these functions. A slow metabolism burns fewer calories than a fast one. Factors that determine your metabolic rate include gender, body composition, age, daily activity and genetics. The difference between slow erroneous and slow correct trials also revealed a significant prolonged feedback-related effect in beta range that possibly started We focused on the distinction between fast and slow behavioral responses. In line with our predictions, we found that error-related FMT was Thinking Fast and Slow. by Daniel Kahneman. Our expectations about the frequency of events are distorted by the prevalence and emotional intensity of the messages to which we are exposed. The persistence of individual differences in achievement is the measure by which we confirm the In other words, the difference between the 6 tested instances make difficult to find a parameter value that fit all the situations. An example is the method VP_n In this paper, we have proposed a local search algorithm for the frequency planning problem in slow frequency hopping military systems. frequency-hop spread spectrum o Cheaper to implement but less protection against noisejamming o Popular technique for wireless LANs.T.Contemporary frequency hopping systems use either noncoherent or differentially coherent difference between slow and fast frequency hopping pdf. The hopping is slow, with multiple symbols per hop, which is a more suitable strategy for ad hoc networks than Now suppose that the link between the source. and receiver undergoes Nakagami fading with Frequency-hopping ad hoc networks pl