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Multilevel Decision Method for Gtfm Signal with Limiter-discriminator Detection

This article presents experimental results and performance analysis of a non-coherent detector for a Generalized Tamed Frequency Modulation (GTFM) Signal. An improved detector type for the GTFM signal, introduced, consisting of a limiter-discriminator, integrate and dump circuit and detector with four-level decision feedback. The receiver performance in gausian noise shows approximately a 0.6 dB improvement compared to the bit-by-bit detection described by Chung. Adjacent channel interference with and without noise was investigated, with up to 40 dB power difference between signals.