US 11,240,078 B1 · Frequency shift keying modulator, transmitter and link

Abstract

A Continuous Phase Frequency Shift Keying modulator provided to receive a series of binary symbols having a predetermined repetition period, and generate a series of sinusoidal signals comprising in sequence: a first sinusoidal signal with a first frequency in response to each received binary symbol having a first binary value; and a second sinusoidal signal with a second frequency in response to a received binary symbol having a second binary value, where the lowest of the first and second frequencies is larger than or equal to a third of the symbol rate; wherein the sinusoidal signals are shortened or lengthened with respect to the binary symbol they respond to, such that each first sinusoidal signal comprises an integer number of half periods of said first frequency and each second sinusoidal signal comprises an integer number of half periods of said second frequency.

Claims20

Dependent claims

A Continuous Phase Frequency Shift Keying modulator comprising

an input port configured to receive a series of binary symbols having a predetermined repetition period;
a signal processor configured to generate a series of sinusoidal signals comprising in sequence:
a first sinusoidal signal with a first frequency in response to each received binary symbol having a first binary value;
and
a second sinusoidal signal with a second frequency in response to a received binary symbol having a second binary value, where the lowest of the first and second frequencies is larger than or equal to one third the symbol rate;
wherein the sinusoidal signals are shortened or lengthened with respect to the binary symbol they respond to, such that each first sinusoidal signal comprises an integer number of half periods of said first frequency and each second sinusoidal signal comprises an integer number of half periods of said second frequency;
and
an output port configured to output said series of sinusoidal signals.

5 more elements

A Continuous Phase Frequency Shift Keying modulation method comprising:

receiving a series of binary symbols having a predetermined repetition period;
and
generating a series of sinusoidal signals comprising in sequence:
a first sinusoidal signal with a first frequency in response to each received binary symbol having a first binary value;
and
a second sinusoidal signal with a second frequency in response to a received binary symbol having a second binary value, where the lowest of the first and second frequencies is larger than or equal to one third the symbol rate;
the method comprising shortening or lengthening the sinusoidal signals with respect to the binary symbol they respond to, such that each first sinusoidal signal comprises an integer number of half periods of said first frequency and each second sinusoidal signal comprises an integer number of half periods of said second frequency.

4 more elements

Dependencies are inferred from the claim text.

Frequency shift keying modulator, transmitter and link

Life of this patent

Frequency shift keying modulator, transmitter and link

Life of this patent

Abstract

Claims20