[특허]Power control of a direct sequence CDMA radio

Power control of a direct sequence CDMA radio 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-013/00 H04B-007/216
출원번호	US-0706479 (1991-05-28)
발명자 / 주소	Vilmur Richard J. (Palatine IL) Metroka Michael P. (Algonquin IL)
출원인 / 주소	Motorola, Inc. (Schaumburg IL 02)
인용정보	피인용 횟수 : 60 인용 특허 : 0

초록 ▼

The power control apparatus of the present invention is comprised of a local oscillator signal path coupled to a mixer (106) through a variable attenuator (107) and an IF signal path coupled to the mixer (106) through two variable attenuators (108 and 109) coupled in series. The IF signal path attenuators (108 and 109) are controlled by digital control circuitry (111) while the local oscillator path attenuator (107) is controlled by the control circuitry through a level shifter (110). The power level of the signal generated by the mixing of these two signals is less than the conducted output of the radiotelephone\s power amplifier.

대표청구항 ▼

An apparatus for controlling transmitted power of a code-division multiple access communication device, the communication device having a local oscillating signal, an intermediate frequency (IF) signal, the apparatus comprising: means for generating an attenuation control signal; first controllable attenuation means, coupled to the local oscillating signal, for generating an attenuated local oscillating signal, the first controllable attenuation means changing attenuation in response to the attenuation control signal; second controllable attenuation means, coupled to the IF signal, for generating an attenuated IF signal, the second attenuation means changing attenuation in response to the attenuation control signal; and mixing means, coupled to the first controllable attenuation means and the second controllable attenuation means, for generating a transmit frequency signal from the attenuated local oscillating signal and the attenuated IF signal.

이 특허를 인용한 특허 (60)

Andersson Christoffer,SEX ; Ericson M.ang.rten,SEX, Adaptive power control in a mobile radio communications system.
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Bark, Gunnar; Rimhagen, Thomas; Muller, Walter, Adaptive power control in a radio communications systems.
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De Loe ; Jr. John P. (Decatur GA), Automatic gain control circuit for both receiver and transmitter adjustable amplifiers including a linear signal level d.
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Lomp, Gary R.; Ozluturk, Faith M.; Kowalski, John, Automatic power control system for a code division multiple access (CDMA) communications system.
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Butovitsch, Peter; Andersson, Peter B., Base station transmit power control in a CDMA cellular telephone system.
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Ayyagari,Deepak; Resheff,Samuel; Ephremides,Anthony, Capacity enhancement for multi-code CDMA with integrated services through quality of service and admission control.
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Ayyagari Deepak ; Resheff Samuel ; Ephremides Anthony, Capacity enhancement for multi-code CDMA with integrated services through quality of services and admission control.
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Ozluturk, Fatih M.; Jacques, Alexander M.; Lomp, Gary R.; Kowalski, John, Code division multiple access (CDMA) communication system.
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Waldroup Anthony B. ; Lyall ; Jr. Robert L. ; Bain Richard I., Comprehensive transmitter power control system for radio telephones.
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Antonius G. Wagemans NL, Device for generating an AC amplitude-dependent indicator.
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Gard, Kevin; Segoria, Anthony; Sahota, Gurkanwal (Kamal); Persico, Charles, Direct conversion with variable amplitude LO signals.
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Gard,Kevin; Segoria,Anthony; Sahota,Gurkanwal (Kamal); Persico,Charles, Direct conversion with variable amplitude LO signals.
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Persson, Magnus; Lieshout, Gert-Jan van; Corbett, Eddie; Andersson, Andreas, Downlink transmit power synchronization during diversity communication with a mobile station.
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Franklin P. Antonio, Increased capacity data transmission in a CDMA wireless communication system.
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Bringby Daniel,SEX ; Lundborg Tomas,SEX, Initial transmit power determination in a radiocommunication system.
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Bender Paul E. ; Holcman Toni L. ; Karmi Gadi ; Lee Kuo-Chun ; Lueder Suzanne M. ; Mohanty Bibhu P. ; Ottinger Robert C. ; Quick ; Jr. Roy F. ; Stachwick Steven P. ; Sutton Todd ; Tangirala Venkat ; , Inter-system soft handoff.
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Tsumura Soichi,JPX, Level control circuit for portable radio communication apparatus.
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Edward G. Tiedemann, Jr. ; Abhijit G. Shanbhag, Method and apparatus for a dedicated control channel in an early soft handoff in a code division multiple access communication system.
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Tiedemann, Jr., Edward G.; Shanbhag, Abhijit G., Method and apparatus for a dedicated control channel in an early soft handoff in a code division multiple access communication system.
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Tiedemann, Jr., Edward G.; Shanbhag, Abhijit G., Method and apparatus for a dedicated control channel in an early soft handoff in a code division multiple access communication system.
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Prescott Tobin A., Method and apparatus for adaptive closed loop power control using open loop measurements.
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Holtzman, Jack M.; Chen, Tao; Razoumov, Leonid, Method and apparatus for controlling transmission power in a CDMA communication system.
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Chen, Tao; Holtzman, Jack M.; Saints, Keith; Wheatley III, Charles E.; Ling, Fuyun; Sindhushayana, Nagabhushana, Method and apparatus for controlling transmission power in a potentially transmission gated or capped communication system.
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Tao Chen ; Jack M. Holtzman ; Keith Saints ; Charles E. Wheatley, III ; Fuyun Ling ; Nagabhushana Sindhushayana, Method and apparatus for controlling transmission power in a potentially transmission gated or capped communication system.
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Chen, Tao; Holtzman, Jack M.; Razoumov, Leonid; Patel, Shim; Saints, Keith; Tiedemann, Jr., Edward G., Method and apparatus for controlling transmission power while in soft handoff.
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Chen, Tao; Holtzman, Jack M.; Razoumov, Leonid; Patel, Shim; Saints, Keith; Tiedemann, Jr., Edward G., Method and apparatus for controlling transmission power while in soft handoff.
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Chen, Tao; Holtzman, Jack M.; Razoumov, Leonid; Patel, Shimman; Saints, Keith; Tiedemann, Jr., Edward G., Method and apparatus for controlling transmission power while in soft handoff.
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Bender Paul E. ; Ziv Noam A., Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers.
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Bender Paul E. ; Ziv Noam A., Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers.
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Bender, Paul E.; Ziv, Noam A., Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers.
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Edward G. Tiedemann, Jr. ; Keith W. Saints, Method and apparatus for forward link power control.
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Tiedemann, Jr., Edward G.; Saints, Keith W., Method and apparatus for forward link power control.
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Tiedemann, Jr., Edward G.; Saints, Keith W., Method and apparatus for forward link power control.
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Tiedemann, Jr., Edward G.; Saints, Keith W., Method and apparatus for forward link power control.
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Tiedemann, Jr., Edward G.; Chen, Tao, Method and apparatus for performing fast power control in a mobile communication system.
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Tiedemann, Jr., Edward G.; Odenwalder, Joseph P.; Wheatley, III, Charles E.; Padovani, Roberto, Method and apparatus for performing fast power control in a mobile communication system.
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Tiedemann, Jr.,Edward G.; Odenwalder,Joseph P.; Wheatley, III,Charles E.; Padovani,Roberto, Method and apparatus for performing fast power control in a mobile communication system.
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Padovani Roberto ; Quick Roy F., Method and apparatus for performing soft hand-off in a wireless communication system.
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Padovani,Roberto; Quick, Jr.,Roy Franklin, Method and apparatus for performing soft hand-off in a wireless communication system.
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Soliman Samir S., Method and apparatus for performing soft hand-off in a wireless communication system.
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Chen Tao, Method and apparatus for power adaptation control in closed-loop communications.
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Sarkar, Sandip; Holtzman, Jack M., Method and apparatus for power control in a wireless communication system.
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Prescott Tobin A., Method and apparatus for predictive parameter control with loop delay.
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Li Kaiping ; Ong Chung-yen, Mobile station closed loop output power stability system for weak signal conditions.
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Tong, Wen; Le Strat, Evelyn, Multi-bit power control and power control command sub-channel design.
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Kaiping Li, Partial sleep system for power savings in CDMA wireless telephone devices.
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Willenegger Serge ; Tiedemann ; Jr. Edward G. ; Jou Yu-Cheun ; Odenwalder Joseph P., Pilot based, reversed channel power control.
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Barber Clifton J., Power amplifying circuitry for wireless radio transceivers.
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Rune, G?ran; van Lieshout, Gert-Jan, Power control for downlink shared channel in radio access telecommunications network.
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Park Hyung-Weon,KRX, Power control technique of radio communication system.
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Kim, Young-Ky; Park, Su-Won; Ahn, Jae-Min; Kim, Jae-Yeol, Reverse closed loop power control in control hold state for CDMA communication system.
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Waldroup Anthony B. ; Yamazaki Ryo ; Wang He Feng,JPX, Saturation prevention system for radio telephone with open and closed loop power control systems.
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Yamazaki Ryo (Arlington Heights IL) Waldroup Anthony B. (Suwanee GA) Wang He Feng (Saitama JPX), Saturation prevention system for radio telephone with open and closed loop power control systems.
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Brian K. Harms ; Anthony C. K. Soong ; Thomas J. Funk ; Larry D. Flowers, Spectral shaping a CDMA signal.
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Yano, Takashi; Doi, Nobukazu, Spread spectrum communication system and transmission power control method therefor.
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Yano,Takashi; Doi,Nobukazu, Spread spectrum communication system and transmission power control method therefor.
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Chin, Tom, System and method for reducing dropped calls in a wireless communications network.
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Vakilian, Nooshin D.; Rozenblit, Dmitriy; Domino, William J.; Damgaard, Morten, System for allowing a TDMA/CDMA portable transceiver to operate with closed loop power control.
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Kroebel,Hans Eberhard; Simon,Martin, Transmission arrangement, particularly for mobile radio.
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Tiedemann ; Jr. Edward G. ; Jou Yu-Cheun, Transmit power reduction for a high speed CDMA link in soft handoff.
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Power control of a direct sequence CDMA radio 원문보기

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