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Simplified FSK Signal Detection

FSK (Frequency Shift Keying) is the modulation cornerstone of a number of digital data transmission systems. The transmit signal is relatively easy to generate. Receive processing is tolerant of a wide range of signals and relatively immune to a large class of interfering signals. The paper demonstrates an efficient (almost) all-hardware method for detecting FSK signals using a correlator and analog signal processing in the PSoC. Combined with a UART, this detector forms the core of a half duplex modem.

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Sep 23, 2008