Multichannel high frequency communication system has interference exciser that detects narrow frequency band interference in Fourier transformed signal which is decoded to derive original message

摘要

The receiver detects the modulated high frequency signal transmitted from transmitter. A fast Fourier transform (FFT) processor performs Fourier transformation of detected signal. An interference exciser detects band interference in Fourier transformed signal. A cross co-relation matched filter detector derives the original message signal by decoding the Fourier transformed signal.