System/method for receiving ASK and FSK signals using a single RF receiver

A system (100) utilizes a single receiver (102) to simultaneously receive and demodulate both amplitude shift keying (ASK) messages and frequency shift keying (FSK) messages. The single receiver (102) is used to demodulate the FSK modulated message and the single receiver (102) provides a received signal strength indicator (RSSI) signal that provides an indication of a combined strength of the FSK and ASK messages. The RSSI signal is filtered and then data sliced to provide a digital message that corresponds to a demodulated version of the ASK modulated message.