Method and apparatus for generating pulses from phase shift keying analog waveforms
First Claim
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1. A method for detecting a phase shift keying (PSK) signal comprising:
- for each cycle of said PSK signal (i) producing a first group of one or more pulses based on a positive portion of said cycle and (ii) producing a second group of one or more pulses based on a negative portion of said cycle; and
producing an information symbol on the basis of said first and second groups of one or more pulses.
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Abstract
Methods and apparatus for detecting phase shift keying (PSK) signals using circuitry having nonlinear dynamics characteristics are disclosed. A receiver circuit can be implemented using a simple tunnel diode or using an op-amp to provide dynamic characteristics comprising an unstable region bounded by a first and a second stable region. The approach is able to decode one information symbol represented by one cycle of the PSK signal. Performance enhancements by signal clipping and weighted pulse counting method are also disclosed.
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Citations
45 Claims
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1. A method for detecting a phase shift keying (PSK) signal comprising:
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for each cycle of said PSK signal (i) producing a first group of one or more pulses based on a positive portion of said cycle and (ii) producing a second group of one or more pulses based on a negative portion of said cycle; and
producing an information symbol on the basis of said first and second groups of one or more pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. In a phase shift keying (PSK) signal, a method for recovering information therefrom comprising:
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receiving a transmission of said PSK signal;
producing a plurality of groups of one or more pulses from said PSK signal; and
producing a plurality of symbols based on said groups of one or more pulses, said information comprising said symbols. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A circuit system for detecting a phase shift keying (PSK) signal comprising:
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a first circuit configured to produce a plurality of groups of one or more positive pulses in response to detecting first portions of said PSK signal;
a second circuit configured to produce a plurality of groups of one or more negative pulses in response to detecting second portions of said PSK signal; and
a decoder configured to produce a plurality of information symbols based on said groups of positive and negative pulses. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A phase shift keying (PSK) detection system comprising:
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means for receiving a transmitted PSK signal;
first means for producing a plurality of positive pulses from said received signal;
second means for producing a plurality of negative pulses from said received signal; and
symbol means for producing information symbols from said positive and negative pulses. - View Dependent Claims (42, 43, 44, 45)
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Specification