A Digital Wide-Band Nonlinear Receiver Capable of Near Optimum Reception in the Presence of Narrow-Band Interference

In a wide-band communication system the additive disturbances in the channel are less likely to be white Gaussian noise than in narrow-band links. This paper considers the operation of linear receivers for wide-band systems and illustrates how linear receivers can be made more optimum by incorporating a nonlinear transformation which precedes detection. Narrow-band AM stations are assumed to be the only additive disturbance in the channel. Adaptive techniques are also suggested which will yield near optimum operation under varied types of interference.