FM OFDM over various communication media
First Claim
Patent Images
1. A communication apparatus for communicating electric signals through wireless, or coax cable, or twisted pair or one or more electric lines comprising:
- an Orthogonal Frequency Division Multiplexing (OFDM) or FDM modulator that transmits said multi-carrier modulation scheme by means of FFT said includes adaptive modulation, said includes adaptive coding;
a FM modulator that modulates the OFDM or FDM modulated carrier frequencies;
a first coupler or antenna connected between the electrical line or air and the transmitter, and communicating the modulated carrier frequency signals to the electric line or air; and
a transmitter operatively connected to the modulator and the output side to the coupler or antenna and said transmitter transmitting the modulated carrier frequency signals;
and wherein frequency modulation includes a modulation in which a method of transmitting information by varying the frequency of the carrier wave in accordance with the amplitude of the input signal.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides an FM Orthogonal Frequency Division Multiplexing (OFDM) modulation process that enable high-speed data communications over any transmission media and networks. The process is implemented with a modem device modulator and demodulator that provides communication with several other modem devices along any communication media that uses an FM OFDM modulation technique, a physical transmission medium such as power lines, or wireless (air), or cable, or twisted pairs communication media.
49 Citations
30 Claims
-
1. A communication apparatus for communicating electric signals through wireless, or coax cable, or twisted pair or one or more electric lines comprising:
-
an Orthogonal Frequency Division Multiplexing (OFDM) or FDM modulator that transmits said multi-carrier modulation scheme by means of FFT said includes adaptive modulation, said includes adaptive coding; a FM modulator that modulates the OFDM or FDM modulated carrier frequencies; a first coupler or antenna connected between the electrical line or air and the transmitter, and communicating the modulated carrier frequency signals to the electric line or air; and a transmitter operatively connected to the modulator and the output side to the coupler or antenna and said transmitter transmitting the modulated carrier frequency signals; and wherein frequency modulation includes a modulation in which a method of transmitting information by varying the frequency of the carrier wave in accordance with the amplitude of the input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A communication apparatus for communicating electric signals through one or more electric lines comprising:
-
an Orthogonal Frequency Division Multiplexing (OFDM) or FDM modulator that transmits said multi-carrier modulation scheme by means of FFT said includes adaptive modulation, said includes adaptive coding; a FM modulator that modulates the OFDM or FDM modulated carrier frequencies; a first coupler connected between the electrical line and the transmitter, and communicating the modulated carrier frequency signals to the electric line; a transmitter operatively connected to the modulator and the output side to the coupler and said transmitter transmitting the modulated carrier frequency signals; and wherein frequency modulation includes a modulation in which a method of transmitting information by varying the frequency of the carrier wave in accordance with the amplitude of the input signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A communication apparatus for communicating electric signals through one or more electric lines comprising:
-
an Orthogonal Frequency Division Multiplexing (OFDM) or FDM modulator that transmits said multi-carrier modulation scheme by means of FFT said includes adaptive modulation, said includes adaptive coding; a first coupler connected between the electrical line and the transmitter, and communicating the modulated carrier frequency signals to the electric line; a transmitter operatively connected to the modulator and the output side to the coupler and said transmitter transmitting the modulated carrier frequency signals; and wherein frequency modulation includes a modulation in which a method of transmitting information by varying the frequency of the carrier wave in accordance with the amplitude of the input signal.
-
-
17. An apparatus for transmitting a frequency modulated orthogonal frequency division multiplex (FM/OFDM) communication signal over a transmission medium comprising:
-
an assembly of digital signal processing units adapted to process an incoming baseband signal and to output an in-phase signal and a quadrature signal, the in-phase signal and the quadrature signal in combination, forming an orthogonal frequency division multiplex (OFDM) signal; a first frequency modulation modulator adapted to receive the in-phase signal; and a second frequency modulation modulator adapted to receive the quadrature signal, wherein the first frequency modulation modulator and the second frequency modulation modulator are each adapted to provide an output to the transmission medium in separate frequency bands, and wherein frequency modulation includes a modulation in which the instantaneous frequency of a carrier signal departs from the center frequency of said carrier signal by an amount proportional to the instantaneous value of a modulating signal. - View Dependent Claims (18)
-
-
19. An apparatus for receiving a frequency modulated orthogonal frequency division multiplex (FM/OFDM) communication signal from a transmission medium, said FM/OFDM communication signal comprising an in-phase component and a quadrature component in separate frequency bands, said apparatus comprising:
-
first and second frequency modulation demodulators, the first frequency modulation demodulator adapted to receive the in-phase component from the transmission media and the second frequency modulation demodulator adapted to receive the quadrature component from the transmission media and each providing an OFDM output signal, said first and second demodulators being operative in separate frequency bands and an assembly of digital signal processing units connected to respective outputs of said first frequency modulation demodulator and said second frequency modulation demodulator, said assembly of digital signal processing units being adapted to process the in-phase and the quadrature signals received respectively from the first frequency modulation demodulator and the second frequency modulation demodulator and to provide a baseband signal, and wherein frequency modulation includes a modulation in which the instantaneous frequency of a carrier signal departs from the center frequency of said carrier signal by an amount proportional to the instantaneous value of a modulating signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
-
-
27. An apparatus for transmitting a frequency modulated orthogonal frequency division multiplex (FM/OFDM) communication signal over a transmission medium comprising:
-
an assembly of digital signal processing units adapted to process an incoming baseband signal and to output an in-phase signal and a quadrature signal, the in-phase signal and the quadrature signal, in combination, forming an orthogonal frequency division multiplex (OFDM) signal; a first frequency modulation modulator adapted to receive the sum of the in-phase and quadrature signal; wherein the first frequency modulation modulator is adapted to provide an output to the transmission media in a frequency band, and wherein frequency modulation includes a modulation in which the instantaneous frequency of a carrier signal departs from the center frequency of said carrier signal by an amount proportional to the instantaneous value of a modulating signal.
-
-
28. An apparatus for receiving a frequency modulated orthogonal frequency division multiplexed (FM/OFDM) communication signal from a transmission medium, said FM/OFDM communication signal comprising an in-phase component and a quadrature component in the same frequency band, said apparatus comprising:
-
first frequency modulation demodulator adapted to receive the in-phase and the quadrature component from the transmission media and providing an OFDM output signal, said first demodulator being operative in a frequency band; and an assembly of digital signal processing units connected to respective outputs of said first frequency modulation demodulator, said assembly of digital signal processing units being adapted to process the in-phase and the quadrature signals received from the first frequency modulation demodulator and to provide a baseband signal, and wherein frequency modulation includes a modulation in which the instantaneous frequency of a carrier signal departs from the center frequency of said carrier signal by an amount proportional to the instantaneous value of a modulating signal.
-
-
29. An apparatus for transmitting a coded and/or adaptive and/or orthogonal frequency modulated orthogonal frequency division multiplex (FM/OFDM) communication signal over a transmission medium comprising:
-
an assembly of digital signal processing units adapted to process an incoming baseband signal and to output an in-phase signal and a quadrature signal, the in-phase signal and the quadrature signal, in combination, forming an orthogonal frequency division multiplex (OFDM) signal; a first frequency modulation modulator adapted to receive the sum of the in-phase and quadrature signal; wherein the first coded and/or adaptive and/or orthogonal frequency modulation modulator is adapted to provide an output to the transmission media in a frequency band, and wherein frequency modulation includes a modulation in which the instantaneous frequency of a carrier signal departs from the center frequency of said carrier signal by an amount proportional to the instantaneous value of a modulating signal.
-
-
30. An apparatus for receiving a coded and/or adaptive and/or orthogonal frequency modulated orthogonal frequency division multiplexed (FM/OFDM) communication signal from a transmission medium, said FM/OFDM communication signal comprising an in-phase component and a quadrature component in the same frequency band, said apparatus comprising:
-
first frequency modulation demodulator adapted to receive the in-phase and the quadrature component from the transmission media and providing an OFDM output signal, said first demodulator being operative in a frequency band; and an assembly of digital signal processing units connected to respective outputs of said first coded and/or adaptive and/or orthogonal frequency modulation demodulator, said assembly of digital signal processing units being adapted to process the in-phase and the quadrature signals received from the first frequency modulation demodulator and to provide a baseband signal, and wherein frequency modulation includes a modulation in which the instantaneous frequency of a carrier signal departs from the center frequency of said carrier signal by an amount proportional to the instantaneous value of a modulating signal.
-
Specification