Back to results
US 2007/0165698 A1Published application
Pre-whitened DC free line coding
AssigneeHoneywell International Inc.
InventorsJamal Haque, Timothy Kikta
Life of this patent
Estimating the term…
Abstract
A pre-whitened DC free line coding system is provided. The pre-whitened DC free line coding system comprises a scrambler adapted to whiten an input signal and an encoder adapted to convert the whitened input signal to a DC balanced signal.
Claims21
A pre-whitened DC free line coding system comprising:
- a scrambler adapted to whiten an input signal;
- and
- an encoder adapted to convert the whitened input signal to a DC balanced signal.
A method of removing dependency of an encoded output spectrum on the spectral shape of the input data sequence, the method comprising:
- scrambling a data signal such that the power spectrum is substantially evenly spread over a known bandwidth;
- and
- encoding the scrambled data signal to output a DC balanced signal.
A data scrambler comprising:
- a shift register;
- and
- at least one exclusive-OR operator (XOR), an input of the at least one XOR being coupled to one or more bits of the shift register, the register size and selection of the one or more bits coupled to the at least one XOR being based on the coding scheme of an encoder coupled to the data scrambler.
A pre-whitened DC free line coding system, comprising:
- means for whitening a data signal;
- and
- means for encoding the whitened data signal coupled to the means for whitening the data signal, wherein the means for encoding the whitened data signal encodes the whitened data signal such that the whitened data signal is DC balanced.
Dependencies are inferred from the claim text.