Patent ID: 8644426

Claim:
A differential receiver, comprising: a phase detector to generate phase values based on a stream of baseband data that is provided to a received signal strength indicator (RSSI) module; and a preamble detection module, comprising: a phase monitoring unit to monitor the phase values and detect an ambiguity in the phase values; a phase ambiguity elimination unit to remove the detected ambiguity to produce corrected phase values; a preamble detection unit to detect a communication channel preamble sequence based on the corrected phase values; and a received signal strength indicator (RSSI) monitoring unit to monitor an output of the RSSI module and report changes in a magnitude of RSSI values generated by the RSSI module to a controller configured to determine whether in-band interference is present in a detected preamble sequence of phase values based on changes in a magnitude of data filtered by a channel filter.