Mobility

FPGA Implementation of an Algorithm to Identify a BPSK (Barker) Signal

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Executive Summary

Modern radars use phase modulated signals to spread their spectrum to improve the processing gain. The Identification of the modulation format of a detected signal, the intermediate step between signal detection and demodulation, is a major task of an intelligent receiver, with various civilian and military applications. Obviously, with no knowledge of the transmitted data and many unknown parameters at the receiver, such as the signal power, carrier frequency and phase offsets, timing information, etc., blind identification of the modulation is a difficult task. This becomes even more challenging in real-world scenarios. An algorithm is designed to identify the BPSK (Barker) signal using an STFT Process and calculating the chip rate from the spectrum.

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