Data slicer with digitally-controlled reference

Details Data slicer with digitally-controlled reference Data slicer with digitally-controlled reference

H - Electricity

04

L

H04L 25/03 (2006.01) H03K 5/08 (2006.01) H04L 25/06 (2006.01)

Patent

CA 2325116

The present disclosure discloses a method and apparatus for slicing data, or "squaring up" a signal such as the output of a wireless receiver demodulator for proper interface with conventional digital logic circuits. The method involves the receiving of an input signal, the generation of a reference level, the comparison of the input signal to the reference level, and the measurement and storage of the reference level. The reference level is generated by applying the input signal to a filter, which has been previously set to an initial condition. The reference level is measured at a predetermined point in a receive data frame, and is maintained at the desired level throughout the remainder of the frame. After a frame has been received, the reference level is stored if the frame data output from the data slicer contained no errors. For multi-channel receivers, in which a different data slicer reference level may be optimal for each channel, a separate filter initial condition can be stored for each channel, and the reference level is set to the stored initial condition corresponding to the current channel prior to receiving data on the current channel.

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