IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0987435
(2011-01-10)
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등록번호 |
US-8116689
(2012-02-14)
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발명자
/ 주소 |
- Qi, Yihong
- Jarmuszewski, Perry
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출원인 / 주소 |
- Research In Motion Limited
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대리인 / 주소 |
Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
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인용정보 |
피인용 횟수 :
0 인용 특허 :
48 |
초록
▼
Antenna noise temperature is determined for a handheld wireless communication device which typically includes a radio, e.g. having a wireless transceiver and associated circuitry connected thereto, and an antenna connected to the radio. The method includes measuring an antenna thermal noise componen
Antenna noise temperature is determined for a handheld wireless communication device which typically includes a radio, e.g. having a wireless transceiver and associated circuitry connected thereto, and an antenna connected to the radio. The method includes measuring an antenna thermal noise component, measuring a radio noise component, measuring an environmental background noise component, and determining the antenna noise temperature based upon the measured antenna thermal noise, radio noise, and environmental background noise components. The method may include measuring antenna efficiency, and determining further includes weighting at least one of the measured antenna thermal noise, radio noise and environmental background noise components based upon the measured antenna efficiency.
대표청구항
▼
1. A method of determining a receive sensitivity for a wireless communication device comprising radio circuitry on a circuit board and an antenna coupled to the radio circuitry, the method comprising: determining an antenna noise temperature based upon an antenna thermal noise component, a radio noi
1. A method of determining a receive sensitivity for a wireless communication device comprising radio circuitry on a circuit board and an antenna coupled to the radio circuitry, the method comprising: determining an antenna noise temperature based upon an antenna thermal noise component, a radio noise component, and an environmental background noise component;determining an antenna gain pattern for the antenna; anddetermining the receive sensitivity for the wireless communication device based upon the antenna noise temperature and the antenna gain pattern. 2. The method according to claim 1 wherein determining the antenna noise temperature is performed independently from determining the antenna gain pattern. 3. The method according to claim 1 wherein determining the antenna noise temperature further comprises: determining an antenna efficiency; andweighting at least one of the antenna thermal noise component, the radio noise component, and the environmental background noise component based upon the antenna efficiency. 4. The method according to claim 1 wherein the antenna noise temperature Tt is defined as Tt=ηTA+(1−2η)TP+ηTR where η is an antenna efficiency, TA is the environmental background noise component, TP is the antenna thermal noise component, and TR is the radio noise component. 5. The method according to claim 1 wherein the antenna thermal noise component is based upon a conductive sensitivity. 6. The method according to claim 1 wherein the antenna thermal noise component Tp is defined as TP=Psig,minF·SNRout,min·k·BWhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth and F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRt). 7. The method according to claim 1 wherein the radio noise component is based upon a radiated sensitivity of the wireless communication device in an anechoic chamber at room temperature. 8. The method according to claim 1 wherein the radio noise component TR is defined as TR=Psig,minF·SNRout,min·k·B·η-(1-η)TPηwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth, F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout), η is an antenna efficiency, and TP is the antenna thermal noise component. 9. The method according to claim 1 wherein the environmental background noise component is based upon a radiated sensitivity of the wireless communication device in an operating environment including a plurality of noise sources. 10. The method according to claim 1 wherein the environmental background noise component TA is defined as TA=Psig,minF·SNRout,min·k·B·η-(1-2η)TPη-TRwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth, F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout), η is an antenna efficiency, TP is the antenna thermal noise component, and TR is the radio noise component. 11. A method of determining a receive sensitivity for a wireless communication device comprising radio circuitry on a circuit board and an antenna coupled to the radio circuitry, the method comprising: determining an antenna noise temperature and an antenna gain pattern independently from one another; anddetermining the receive sensitivity for the wireless communication device based upon the antenna noise temperature and the antenna gain pattern. 12. The method according to claim 11 further comprising determining antenna efficiency; and wherein determining the antenna noise temperature is based upon the antenna efficiency. 13. The method according to claim 1 wherein the antenna noise temperature Tt is defined as T=ηTA+(1−2η)TP+ηTR where η is an antenna efficiency, TA is an environmental background noise component, TP is an antenna thermal noise component, and TR is a radio noise component. 14. The method according to claim 13 wherein the antenna thermal noise component Tp is defined as TP=Psig,minF·SNRout,min·k·Bwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth and F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout). 15. The method according to claim 13 wherein the radio noise component TR is defined as TR=Psig,minF·SNRout,min·k·B·η-(1-η)TPηwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth, F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout), η is the antenna efficiency, and TP is the antenna thermal noise component. 16. The method according to claim 13 wherein the environmental background noise component TA is defined as TA=Psig,minF·SNRout,min·k·B·η-(1-2η)TPη-TRwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth, F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout), η is the antenna efficiency, Tp is the antenna thermal noise component, and TR is the radio noise component. 17. A method of determining a receive sensitivity for a wireless communication device comprising radio circuitry on a circuit board and an antenna coupled to the radio circuitry, the method comprising: determining an antenna noise temperature based upon weighting at least one of an antenna thermal noise component, a radio noise component, and an environmental background noise component;determining an antenna gain pattern independently of determining the antenna noise temperature; anddetermining the receive sensitivity for the wireless communication device based upon the antenna noise temperature and the antenna gain pattern. 18. The method according to claim 17 wherein the antenna thermal noise component is based upon a conductive sensitivity. 19. The method according to claim 17 wherein the radio noise component is based upon a radiated sensitivity of the wireless communication device in an anechoic chamber at room temperature. 20. The method according to claim 17 wherein the environmental background noise component is based upon a radiated sensitivity of the wireless handheld communication device in an operating environment including a plurality of noise sources. 21. The method according to claim 17 wherein the antenna noise temperature Tt is defined as Tt=ηTA+(1−2η)TP+ηTR where η is an antenna efficiency, TA is an environmental background noise component, TP is an antenna thermal noise component, and TR is a radio noise component. 22. The method according to claim 1 wherein the antenna thermal noise component Tp is defined as TP=Psig,minF·SNRout,min·k·Bwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth and F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout). 23. The method according to claim 1 wherein the radio noise component TR is defined as TR=Psig,minF·SNRout,min·k·B·η-(1-η)TPηwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth, F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout), η is the antenna efficiency, and TP is the antenna thermal noise component. 24. The method according to claim 1 wherein the environmental background noise component TA is defined as TA=Psig,minF·SNRout,min·k·B·η-(1-2η)TPη-TRwhere SNRout.min is a minimum detectable signal-to-noise ratio, Psig.min is a minimum input signal level, k is Boltzman's constant, B is a channel bandwidth, F is a device noise figure which is defined as a ratio of an input signal-to-noise ratio and an output signal-to-noise ratio (SNRin/SNRout), η is the antenna efficiency, TP is the antenna thermal noise component, and TR is the radio noise component.
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