Wireless computer network including a mobile appliance containing a single chip transceiver
First Claim
1. A wireless computer data network, comprising:
- a plurality of mobile, wireless appliances;
at least one base station connected to the Internet; and
an interface circuit for establishing an ad-hoc radio communication link amongst the plurality of mobile, wireless appliances and the base station;
wherein, the interface circuit operates with carrier frequencies in the 5 GHz band and data is transferred with orthogonal frequency division multiplexing (OFDM), and wherein each of the plurality of mobile, wireless appliances comprises;
a single integrated circuit that implements a complete radio transceiver for wireless connection with the interface circuit, wherein said single integrated circuit comprises;
at least two independent frequency synthesizers connected in a double-conversion superheterodyne configuration.
3 Assignments
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Accused Products
Abstract
A wireless computer data network includes several untethered mobile units that make ad-hoc data connections with an Internet-connected base station using the IEEE-802.11a standard. Each unit includes a radio transceiver fully integrated on a single semiconductor chip. The receiver portion is a double-conversion superheterodyne type, and shares the same intermediate and local oscillator frequencies with a two-stage up-conversion transmitter. Two on-chip synthesizers that each include a voltage-controlled oscillator and phase-locked loop can be operated independently for each conversion stage, or operated in offset mode. External reference frequencies can be injected for voltage-controlled oscillator and phase-locked loop testing, chip characterization, and automatic compensation modeling. Each mobile and base unit can be outfitted with transmit/receive antenna transfer switches, RF-power amplifiers, and low-noise receiver amplifiers to increase operating range.
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Citations
14 Claims
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1. A wireless computer data network, comprising:
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a plurality of mobile, wireless appliances; at least one base station connected to the Internet; and an interface circuit for establishing an ad-hoc radio communication link amongst the plurality of mobile, wireless appliances and the base station; wherein, the interface circuit operates with carrier frequencies in the 5 GHz band and data is transferred with orthogonal frequency division multiplexing (OFDM), and wherein each of the plurality of mobile, wireless appliances comprises; a single integrated circuit that implements a complete radio transceiver for wireless connection with the interface circuit, wherein said single integrated circuit comprises; at least two independent frequency synthesizers connected in a double-conversion superheterodyne configuration.
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2. A wireless computer data network, comprising:
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a plurality of mobile, wireless appliances; at least one base station connected to the Internet; and an interface circuit for establishing an ad-hoc radio communication link amongst the plurality of mobile, wireless appliances and the base station; wherein, the interface circuit operates with carrier frequencies in the 5 GHz band and data is transferred with orthogonal frequency division multiplexing (OFDM), and wherein each of the plurality of mobile, wireless appliances comprises; a single integrated circuit that implements a complete ratio transceiver for wireless connection with the interface circuit, wherein said single integrated circuit comprises; a pair of on-chip synthesizers that each have a voltage-controlled oscillator and phase-locked loop that can be operated independently for each conversion stage, or operated in offset mode; and an input for bypassing the on-chip synthesizers and to inject external reference frequencies during voltage-controlled oscillator and phase-locked loop testing, chip characterization, and automatic compensation modeling.
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3. A wireless computer data network that includes a plurality of untethered mobile units that provide for ad-hoc data connections with an Internet-connected base station using the IEEE-802.11a standard;
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wherein, each mobile unit and base station includes a radio transceiver fully integrated on a single semiconductor chip with a double-conversion superheterodyne type receiver portion and a two-stage up-conversion transmitter that shares the same intermediate and local oscillator frequencies; wherein, a pair of on-chip synthesizers are included that each have a voltage-controlled oscillator and phase-locked loop that can be operated independently for each conversion stage, or operated in offset mode; and wherein, an input is provided for injecting external reference frequencies during voltage-controlled oscillator and phase-locked loop testing, chip characterization, and automatic compensation modeling.
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4. A single-chip radio transceiver for operation in the 5 GHz radio spectrum, comprising:
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a double-conversion superheterodyne radio receiver; a two-stage up-conversion radio transmitter; a first frequency synthesizer connected to supply a higher local oscillator reference frequency to both the receiver and transmitter; a second frequency synthesizer independent of the first frequency synthesizer, and connected to supply a lower local oscillator reference frequency to both the receiver and transmitter; a plurality of ramp and bias generators for selectively and gradually applying operating power to various parts of the receiver, transmitter, and the first and second frequency synthesizers; and a microcomputer connected to monitor and control each of the plurality of ramp and bias generators, receiver, transmitter, and the first and second frequency synthesizers. - View Dependent Claims (5, 6, 7)
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8. A wireless computer data network, comprising:
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a wireless appliance means for mobile roaming within reach of an ad-hoc wireless communication link; at least one base station means for connecting the wireless appliance means through to the Internet over said ad-hoc wireless communication link; and an interface means for establishing said ad-hoc radio communication link, and for operating with carrier frequencies in the 5 GHz band, and for transferring orthogonal frequency division multiplexing (OFDM) data, wherein each of the wireless appliance means comprises; a single integrated circuit means for implementing a single radio transceiver portion of the interface means, wherein said single integrated circuit means comprises; at least two independent frequency synthesizers means for connection in a double-conversion superheterodyne configuration.
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9. A wireless computer data network, comprising:
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a wireless appliance means for mobile roaming within reach of an ad-hoc wireless communication link; at least one base station means for connecting the wireless appliance means through to the Internet over said ad-hoc wireless communication link; and an interface means for establishing said ad-hoc radio communication link, and for operating with carrier frequencies in the 5 GHz band, and for transferring orthogonal frequency division multiplexing (OFDM) data, wherein each of the wireless appliance means comprises; a single integrated circuit means for implementing a single radio transceiver portion of the interface means, wherein said single integrated circuit means comprises; a pair of on-chip synthesizer means for voltage-controlled oscillator and phase-locked loop functions that can be operated independently for each conversion stage, or operated in offset mode; and an input means for bypassing the on-chip synthesizers and to inject external reference frequencies during voltage-controlled oscillator and phase-locked loop testing, chip characterization, and automatic compensation modeling.
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10. A method of operating a wireless computer data network that includes a plurality of untethered mobile units that provide for ad-hoc data connections with an Internet-connected base station using the IEEE-802.11a standard, the method comprising the steps of;
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completely integrating a radio transceiver in each mobile unit and base station on a single semiconductor chip with a double-conversion superheterodyne type receiver portion and a two-stage up-conversion transmitter that shares the same intermediate and local oscillator frequencies; including a pair of on-chip synthesizers on said chip that each have a voltage-controlled oscillator and phase-locked loop that can be operated independently for each conversion stage, or operated in offset mode; and providing an input for injecting external reference frequencies during voltage-controlled oscillator and phase-locked loop testing, chip characterization, and automatic compensation modeling.
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11. A single-chip radio transceiver for operation in the 5 GHz radio spectrum, comprising:
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means for a double-conversion superheterodyne radio reception; means for a two-stage up-conversion radio transmission; means for synthesizing and connecting a first frequency synthesizer to supply a higher local oscillator reference frequency to both the reception and transmission means; means for connecting a second frequency synthesizer independent of the first frequency synthesizer, and for connecting to supply a lower local oscillator reference frequency to both the receiver and transmitter of the transceiver; ramp and bias generator means for selectively and gradually applying operating power to various parts of the receiver, transmitter, and the first and second frequency synthesizers; and microcomputer means for monitoring and controlling ramp and bias generator means, the reception and transmission means, and said first and second frequency synthesizers. - View Dependent Claims (12, 13, 14)
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Specification