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US 7,627,058 B2Granted
Alternating quadratures differential binary phase shift keying modulation and demodulation method
AssigneeTeledyne Licensing, LLC
InventorYefim Samuilovich Poberezhskiy
Life of this patent
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Abstract
A method of performing alternating quadratures differential binary phase shift keying modulation involves limiting phase changes between adjacent in time modulator output symbols to ±90 °, and transmitting modulator input data by 0° and 180° phase differences between non-adjacent in time modulator output symbols.
Claims11
A method of operating a modulator by performing alternating quadratures differential binary phase shift keying modulation, comprising the steps of:
- limiting phase changes between adjacent in time output symbols produced by the modulator to ±90°;
- and
- transmitting data input to the modulator by 0° and 180° phase differences between non-adjacent in time output symbols produced by the modulator.
A method of operating a demodulator, comprising the steps of:
- receiving in the demodulator first and second parity modulated input signals, the phase shift between adjacent in time different parity modulated input signals being limited to ±90° and the phase difference between adjacent in time same parity modulated input signals being 0° or 180°;
- and
- producing output data from the demodulator in response to the phase differences between same parity modulated input signals.
Dependencies are inferred from the claim text.