General Effect of Envelope Normalization in Adaptive Array Control Loops

The properties of an adaptive array antenna, including transient response rate and control loop noise, depend on the intensity of the external noise field. The dependence can be reduced by a general envelope normalization. This can be done without degrading the performance of the adaptive array. Special cases of the normalization are envelope limiting, considered in [4], and one-bit digitization of the real and imaginary parts of the signal from which the envelopes are formed, considered in [5]. Another important special case is one-bit digitization of the imaginary part of the signal from which the envelopes are formed while the real part is set to zero.