Theoretical performance of the non-coherent AIR-receiver

The theoretical performance of the non-coherent adaptive interference reduction (AIR) receiver depicted by Goiser (see Proc. IEEE-ISSTA'96, 1996 and Proc. IEEE-Milcom'96, 1996) is investigated and compared to other digital receivers of low complexity, the RIR- and HL-receiver. For interference it is assumed that the weak direct-sequence signal is corrupted with additive white Gaussian noise and a coherent, constant envelope continuous wave. The theoretical performance is derived with the assumption that the adaptive 2-bit nonlinearity has adjusted its magnitude threshold at the optimum location. The bit-error-rate for constant signal-to-interference ratio and variable signal-to-noise ratio is presented.