Radio repeater and radio relay transmission method
First Claim
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1. A radio repeater, comprising:
- at least first and second relay systems, each includinga reception antenna configured to receive a radio signal;
a loop interference suppressor, connected to the reception antenna, configured to suppress a loop interference signal in the received radio signal from said reception antenna;
an amplifier configured to amplify the loop interference-suppressed radio signal from the loop interference suppressor; and
a transmission antenna having a polarization characteristic, which is orthogonal to a polarization characteristic of said reception antenna, configured to transmit an output of said amplifier,wherein the polarization characteristics of the reception antennas of said first and second relay systems are orthogonal to each other, the polarization characteristics of the transmission antennas of said first and second relay systems are orthogonal to each other, and the loop interference suppressor in each one of said first and second relay systems is configured to produce a suppression signal from the radio signal to be transmitted from the other one of said first and second relay systems and to suppress the loop interference signal in the received radio signal from the reception antenna of said one of the first and second relay systems.
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Abstract
A radio repeater including at least first and second relay systems, each including a reception antenna configured to receive a radio signal, a loop interference suppressor, connected to the reception antenna, configured to suppress a loop interference signal in the received radio signal from said reception antenna, an amplifier configured to amplify the loop interference-suppressed radio signal from the loop interference suppressors, and a transmission antenna having a polarization characteristic, which is orthogonal to a polarization characteristic of said reception antenna, configured to transmit the output of said amplifier.
73 Citations
7 Claims
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1. A radio repeater, comprising:
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at least first and second relay systems, each including a reception antenna configured to receive a radio signal; a loop interference suppressor, connected to the reception antenna, configured to suppress a loop interference signal in the received radio signal from said reception antenna; an amplifier configured to amplify the loop interference-suppressed radio signal from the loop interference suppressor; and a transmission antenna having a polarization characteristic, which is orthogonal to a polarization characteristic of said reception antenna, configured to transmit an output of said amplifier, wherein the polarization characteristics of the reception antennas of said first and second relay systems are orthogonal to each other, the polarization characteristics of the transmission antennas of said first and second relay systems are orthogonal to each other, and the loop interference suppressor in each one of said first and second relay systems is configured to produce a suppression signal from the radio signal to be transmitted from the other one of said first and second relay systems and to suppress the loop interference signal in the received radio signal from the reception antenna of said one of the first and second relay systems. - View Dependent Claims (2, 3, 4, 5)
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6. A radio relay transmission method, comprising:
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transmitting radio signals from a transmitter using at least one of first antennas having a first-polarization characteristic and at least one of second antennas having a second-polarization characteristic which is orthogonalized to the first-polarization characteristic; at a radio repeater having first and second relay systems, each including a reception antenna and a transmission antenna. receiving the transmitted radio signals by the reception antenna of the first relay system having the first polarization characteristic and by the reception antenna of the second relay system having the second-polarization characteristic; producing suppression signals each from a radio signal to be transmitted from the transmission antenna of a corresponding one of said first and second relay systems and suppressing a loop interference signal received by the reception antenna of the other one of said first and second relay systems with the suppression signal; and amplifying the loop-interference-suppressed received radio signal signals in said first and second relay systems and transmitting them from the transmission antennas of said first and second relay systems having the second and first polarization characteristics, respectively, for radio relaying. - View Dependent Claims (7)
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Specification