DEVICE FOR COMPENSATING CROSS POLARIZED WAVE INTERFERENCE

摘要

PURPOSE:To attain high accuracy and low noise by digital signal processing by using an A/D converter with high accuracy and digitizing a demodulation signal. CONSTITUTION:A cross polarized wave signal 16 is digitized by a 10-bit A/D converter 21. The signal is fed to 10-bit M-stage of shift registers (SR) 22, 23, 24. The signal is subject respectively to digital multiplication with control signal (M+1) series 30-34 of K-bit from a tap weight control circuit 37 as to each tap (M+1) stage by multipliers 25-29 and the output is subject to digital addition by a full adder 35. The cross polarized wave signal component leaked to a main polarized wave signal is cancelled by applying digital addition to the output and the result of A/D conversion of the main polarized wave signal 15 by a full adder 36. Thus, a signal of a high-order 4-bit an output of the full adder 36 is the result (38) of identification of the main polarized wave signal where no interference component exists.