A multiple sidelobe canceller using tapped delay line with Gram-Schmidt processing

A multiple sidelobe canceller (MSLC) that can suppress multiple interferences received by a radar needs more auxiliary antennas than the number of interferences. The use of several auxiliary antennas increases the cost of an MSLC. An MSLC using tapped delay line (TDL type MSLC) that has only one auxiliary antenna reduces cost and has an advantage that the convergence time does not depend on incident directions of interferences. In this paper, we show the relation between the convergence time and the product of frequency difference of interferences and time delay, and propose a TDL type MSLC with Gram-Schmidt processing. Simulation results show that the effect of frequency difference and time delay on convergence time is reduced.