Low power full duplex wireless link
First Claim
Patent Images
1. An apparatus, comprising:
- an antenna for receiving an uplink signal during a receive period and for transmitting a downlink signal during a transmit period; and
processing circuitry operably connected to the antenna, said processing circuitry processing the uplink signal to generate the downlink signal, the processing circuitry having an input port and an output port and further comprising;
a delay element, said delay element causing a predetermined delay of the transmit period from the receive period so that the downlink signal is transmitted during the transmit period without interference from the uplink signal, and a modulator for modulating the uplink signal to generate the downlink signal, wherein an uplink signal carrier frequency is equivalent to a downlink signal carrier frequency, no unmodulated portion of the uplink signal is required for transmission of the downlink signal, and no radio frequency generating means is included in the apparatus.
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Accused Products
Abstract
A two-way communication system using a delay element in one unit allows frequency information from an uplink signal received during an uplink receiving period to be delayed, then modulated and amplified for use in a transmitted signal in a downlink transmitting period.
37 Citations
33 Claims
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1. An apparatus, comprising:
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an antenna for receiving an uplink signal during a receive period and for transmitting a downlink signal during a transmit period; and
processing circuitry operably connected to the antenna, said processing circuitry processing the uplink signal to generate the downlink signal, the processing circuitry having an input port and an output port and further comprising;
a delay element, said delay element causing a predetermined delay of the transmit period from the receive period so that the downlink signal is transmitted during the transmit period without interference from the uplink signal, and a modulator for modulating the uplink signal to generate the downlink signal, wherein an uplink signal carrier frequency is equivalent to a downlink signal carrier frequency, no unmodulated portion of the uplink signal is required for transmission of the downlink signal, and no radio frequency generating means is included in the apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus comprising:
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an antenna for receiving an uplink signal during a receive period and for transmitting a downlink signal during a transmit period; and
processing circuitry operably connected to the antenna, said processing circuitry processing the uplink signal to generate the downlink signal, the processing circuitry having an input port and an output port and further comprising;
a delay element, said delay element causing a predetermined delay of the transmit period from the receive period so that the downlink signal is transmitted during the transmit period without interference from the uplink signal, a modulator, said modulator in conjunction with the delay element using pulse position modulation to modulate the uplink signal to generate the downlink signal, an amplifier, and a switch operably connected between the antenna and the processing circuitry, wherein the switch is adapted to switch between the output port and the input port such that the apparatus time-multiplexes between the receive period in which the switch is connected to the input port and the transmit period in which the switch is connected to the output port, wherein an uplink signal carrier frequency is equivalent to a downlink signal carrier frequency, no unmodulated portion of the uplink signal is required for transmission of the downlink signal, and no radio frequency gene rating means is included in the apparatus, the transmitted downlink signal being delayed, modulated and amplified.
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20. A method comprising:
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receiving an uplink signal at an antenna during a receive period;
delaying the uplink signal for a predetermined delay;
modulating the received uplink signal to generate a downlink signal so that the downlink signal'"'"'s carrier frequency is equivalent to the uplink signal'"'"'s carrier frequency; and
transmitting from the antenna the delayed and modulated downlink signal during a transmit period, wherein the predetermined delay causes the downlink signal to be transmitted during the transmit period without interference from the uplink signal even though a downlink signal carrier frequency is equivalent to an uplink signal carrier frequency and that no unmodulated portion of the uplink signal is required for transmission of the downlink signal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A system comprising:
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a remote processing unit, the remote processing unit adapted to transmit a modulated uplink signal to an earpiece unit and adapted to receive a modulated downlink signal from the earpiece unit; and
the earpiece unit, the earpiece unit including, an antenna for receiving the uplink signal during a receive period and for transmitting the downlink signal during a transmit period, a demodulating circuit operably connected to the antenna, the demodulating circuit adapted to produce an audio signal from the modulated uplink signal, a speaker adapted to receive the audio signal, and a processing circuit including;
a delay element, said delay element causing a predetermined delay of the transmit period from the receive period so that the downlink signal is transmitted during the transmit period without interference from the uplink signal, and a modulator for modulating the received unlink signal to generate the downlink signal, wherein an uplink signal carrier frequency is equivalent to a downlink signal carrier frequency, no unmodulated portion of the uplink signal is required for transmission of the downlink signal, and no radio frequency generating means is included in the earpiece unit. - View Dependent Claims (30, 31, 32, 33)
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Specification