METHOD AND APPARATUS FOR PROCESSING A MULTI-LEVEL FSK SIGNAL

摘要

A receiver (100) is used for processing a multi-level FSK signal, comprising a converter (101) for converting the multi-level FSK signal into a sequence of state transitions, and a baud rate detector (111). The baud rate detector (111) comprises in a plurality of sampling intervals, wherein each of the plurality of sampling intervals is offset by a first predetermined time from other sampling intervals, and wherein each of the plurality of sampling intervals is further subdivided into a plurality of recording intervals, a plurality of counters (502-508) for counting the sequence of state transitions that occur during at least a minimum number of the plurality of recording intervals. The baud rate detector (111) further comprises a baud rate detection circuit (524) for detecting the desired baud rate based on counts recorded in a memory (522).