Reduction of the near-far effect in a fast-frequency-hopping receiver

Given the wide-bandwidth required by a fast frequency-hopping radio system, it is likely there will be occasions when another frequency-hopping user or a conventional narrow-band transmitter will be close to a fast-frequency-hopping (FFH) receiver and vice versa. The abrupt changes in the signal produced by the synthesizer in a FFH receiver, when mixed with the interfering signal, produce interference at the IF. The number of channels affected by this class of interference is calculated. It is shown that the number is reduced dramatically if the receiver´s synthesizer output is muted during each frequency change