FSK radio signal receiver with high-sensitivity demodulator and method for operating said receiver

摘要

The receiver (1) has a mixer block (4) mixing radiofrequency signals (FSK) and oscillating signals (So) to produce intermediate signals (INT). A sampler (10) samples the intermediate signals to provide sampled signals. A processing circuit (11) and a selector (12) perform discrete Fourier transform on the sampled signals to determine difference between frequency of a signal amplitude peak above a preset threshold and frequency in the intermediate signals to correct frequency of the oscillating signals and to demodulate data of the sampled signals in a high sensitivity demodulation stage (13). An independent claim is also included for a method for actuating a low power and high sensitivity radiofrequency signal receiver.