AM band transmission using multi-tone modulation
First Claim
1. A communication system for communicating information from a utility distribution network, the communication system comprising:
- a transmitter for transmitting the information, the transmitter comprising;
a digital signal processor modulating the information into a plurality of carrier frequencies;
a digital-to-analog converter connected to the digital signal processor for converting the modulated information into an analog signal; and
a wide band radio frequency (RF) modulator connected to the digital-to-analog converter and receiving the analog signal, the wide band RF modulator modulating the analog signal in an AM frequency band wherein the multi-tone modulated analog signal is transmitted in the AM frequency band by the transmitter wherein the transmitted multi-tone modulated analog signal comprises transmitted information;
a receiver for receiving the transmitted information from the transmitter, the receiver comprising;
a wide band radio frequency (RF) demodulator for receiving the transmitted information, the wide band RF demodulator demodulating the transmitted information into a received analog signal;
an analog-to-digital converter connected to the wide band RF demodulator for converting the received analog signal to received digital data; and
a digital signal processor connected to the analog-to-digital converter and receiving the received digital data, the digital signal processor constructing the received digital data and forming received information.
1 Assignment
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Accused Products
Abstract
A communication system for communicating utility data from a utility distribution network comprises a transmitter for transmitting the utility data. The transmitter comprises a processor that modulates the utility data into a plurality of carrier frequencies. A modulator is connected to the processor and receives the modulated utility data. The modulator modulates the modulated utility data in the AM frequency band forming multi-tone modulated data wherein the transmitter transmits the multi-tone modulated data/transmitted information in the AM frequency band. The communication system also comprises a receiver that receives the transmitted information. The receiver comprises a demodulator that receives the transmitted information and demodulates the transmitted information into a received signal. A processor is connected to the demodulator and receives the demodulated information.
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Citations
27 Claims
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1. A communication system for communicating information from a utility distribution network, the communication system comprising:
a transmitter for transmitting the information, the transmitter comprising;
a digital signal processor modulating the information into a plurality of carrier frequencies;
a digital-to-analog converter connected to the digital signal processor for converting the modulated information into an analog signal; and
a wide band radio frequency (RF) modulator connected to the digital-to-analog converter and receiving the analog signal, the wide band RF modulator modulating the analog signal in an AM frequency band wherein the multi-tone modulated analog signal is transmitted in the AM frequency band by the transmitter wherein the transmitted multi-tone modulated analog signal comprises transmitted information;
a receiver for receiving the transmitted information from the transmitter, the receiver comprising;
a wide band radio frequency (RF) demodulator for receiving the transmitted information, the wide band RF demodulator demodulating the transmitted information into a received analog signal;
an analog-to-digital converter connected to the wide band RF demodulator for converting the received analog signal to received digital data; and
a digital signal processor connected to the analog-to-digital converter and receiving the received digital data, the digital signal processor constructing the received digital data and forming received information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A communication system for communicating information, the communication system comprising:
a transmitter for transmitting the information, the transmitter comprising;
a processor modulating the information into a plurality of carrier frequencies; and
a modulator connected to the processor and receiving the modulated utility data, the modulator modulating the modulated utility data in an AM frequency band forming multi-tone modulated data wherein the multi-tone modulated data is transmitted in the AM frequency band by the transmitter and the transmitted multi-tone modulated data comprises transmitted information;
a receiver for receiving information from the transmitter, the receiver comprising;
a demodulator for receiving the transmitted information, the demodulator demodulating the transmitted information into a received signal; and
a processor connected to the demodulator and receiving the received signal, the processor constructing the received signal and forming received information. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
Specification