CROSS MODULATION DETECTOR AND AUTOMATIC GAIN CONTROLLER

摘要

PROBLEM TO BE SOLVED: To solve a problem that a troublesome control is required for detecting an adjacent channel and a long time is required for reducing cross modulation due to the jamming signal of an adjacent channel.

SOLUTION: Cross modulation occurring when the jamming signal of an adjacent channel is large is detected directly by constellation after demodulation. Among received symbols, amplitude error of a symbol having a large amplitude is detected separately from amplitude error of a symbol having a small amplitude and cross modulation level is detected from the difference thereof.

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