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By fading of your radio signal we mean that incident wave change in the sector strength of signal received from distant transmitter. The fading of signal may be put in the following two categories namely general fading or synchronous fading and selective fading. The fading is caused because of interference between waves that have traveled by slightly different paths. The fading generally is slow taking some minutes to visit from maximum to minimum signal strength. Generally the entire signal fades synchronously. Such a fading is known as general fading or synchronous fading. Amplitude modulated signals traveling through ionosphere experience general fading. The fading might be sensitive to frequency. Thus in amplitude modulated carrier wave the carrier as well as the two side bands may well not fade inside and out synchronously. Such a fading is called as selective fading. Selective fading commonly ends in signals involving large bandwidth like frequency … Read the rest