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AM band transmission using multi-tone modulation

  • US 20030054777A1
  • Filed: 08/28/2001
  • Published: 03/20/2003
  • Est. Priority Date: 08/28/2001
  • Status: Active Grant
First Claim
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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.

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