Method for employing multipath propagation in wireless radio communications
First Claim
1. A method of employing multipath propagation in wireless radio communications comprising the steps of:
- using an omnidirectional transmitting/receiving antenna at one end of a transmission link to send an interrogating signal across an environment subject to multipath disturbances to a phase-conjugating retrodirective antenna at the other end of the transmission link; and
operating the phase-conjugating retrodirective antenna in a cooperative transmission mode by returning a communication signal along the multiple pathways taken by the interrogating signal to be received by the omnidirectional antenna across the transmission environment despite the multipath disturbances.
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Accused Products
Abstract
A method of employing multipath propagation in wireless radio communications uses an omnidirectional transmitting/receiving antenna at one end of a transmission link to send an interrogating signal across an environment subject to multipath disturbances to a phase-conjugating retrodirective antenna, and the retrodirective antenna returns a communication signal along the multiple pathways taken by the interrogating signal to the omnidirectional antenna despite the multipath disturbances. In a simplex communication mode, the retrodirective antenna sends a return signal mixed with a communication signal to the omnidirectional antenna. In a duplex communication mode, both an omnidirectional antenna and a phase-conjugating retrodirective antenna are operated in tandem at each end of the transmission link to provide effective two-way wireless radio transmissions.
44 Citations
6 Claims
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1. A method of employing multipath propagation in wireless radio communications comprising the steps of:
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using an omnidirectional transmitting/receiving antenna at one end of a transmission link to send an interrogating signal across an environment subject to multipath disturbances to a phase-conjugating retrodirective antenna at the other end of the transmission link; and operating the phase-conjugating retrodirective antenna in a cooperative transmission mode by returning a communication signal along the multiple pathways taken by the interrogating signal to be received by the omnidirectional antenna across the transmission environment despite the multipath disturbances. - View Dependent Claims (2, 3)
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4. A communication system for multipath propagation in wireless radio communications comprising:
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an omnidirectional transmitting/receiving antenna at one end of a transmission link for sending an interrogating signal across an environment subject to multipath disturbances; a phase-conjugating retrodirective antenna at the other end of the transmission link for receiving the interrogating signal along multiple pathways and for returning a communication signal along the multiple pathways taken by the interrogating signal to be received by the omnidirectional antenna across the transmission environment despite the multipath disturbances. - View Dependent Claims (5, 6)
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Specification