Patent ID: 7050831
Filing Date: 2006-05-23
Classification: H04B,H04W,Y02D

Abstract:
1. A communication system for communicating between the surface and underground areas of the earth where amount of energy used for communications is limited, comprising: a modulator for modulating a single sideband carrier signal; a first amplifier coupled to the modulator to amplifier signals received from the modulator; an antenna coupled to the first amplifier to receive amplified signals from the first amplifier, the antenna being tuned to receive or transmit or receive and transmit low signal levels, the antenna being coupled to a second antenna by Faraday coupling for communicating to a second system that includes the second antenna, wherein low energy input into the antenna is communicated to the second system via the second antenna; a microprocessor operable at least to filter noise spike from received signals using half-wave averaging and median filtering; a comb filter module coupled to the microprocessor, the comb filter module operable to attenuate one or more harmonics that induce noise in the received signals; a demodulator coupled to the comb filter, the demodulator operable to recover signals; and a switch operable to couple and decouple the antenna from a receiving terminal and a transmitting terminal, wherein through-the-earth communication is enabled.