Parameter optimization and design of forward gain for cosite interference cancellation system

Abstract

This paper investigates the parameter optimal method and design of forward gain with Automatic Gain Control (AGC) for cosite interference cancellation system. The optimal forward gain was calculated and analyzed. With AGC, the couple reference signal can be reduced and the influence of picking up reference to transmitter can be decreased. With the forward gain, the null shift can be suppressed effectively and the convergence speed of CICS is much faster. When the change of interference couple in 20dB, the designed forward gain can still suppress the null shift enough and maintain the faster convergence of CICS.