Patent ID: 6169769
Filing Date: 2001-01-02
Classification: H04L

Abstract:
A receiver for receiving radio frequency signals over a wireless network, comprising: a) an FM demodulator coupled to a receiving antenna, for generating a received encoded data signal with minimized DC bias from a frequency modulated signal transmitted over the network, the received encoded data signal being grouped into blocks, each block having data bits and a single stuff bit having logic levels indicative of whether or not the data bits of a respective block were inverted to reduce the DC bias; b) a stuffbit extractor coupled to the demodulator, for removing the stuff bit from the respective block, and for generating an enable signal having logic levels corresponding to the logic levels of the removed stuff bit; and c) an inverter coupled to the demodulator and to the extractor, for inverting the data bits of the respective block when one of the logic levels of the enable signal corresponds to the logic level of the stuff bit which signifies that data bit inversion had occurred, and for producing a received decoded signal.