[특허]Weighted open loop power control transmitter cross reference to related applications

[미국특허] Weighted open loop power control transmitter cross reference to related applications 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-001/69
출원번호	UP-0978298 (2007-10-29)
등록번호	US-7532659 (2009-07-01)
발명자 / 주소	Zeira, Ariela Shin, Sung Hyuk
출원인 / 주소	InterDigital Technology Corporation
대리인 / 주소	Volpe and Koenig, P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 22

초록 ▼

A weighted open loop power control transmitter for controlling transmission power levels using a spread spectrum time division duplex (TDD) technique having frames with timeslots for communication includes a demodulator configured to receive a transmitted signal from the receiver, a channel estimation device, a data estimation device, and a weighted open loop power controller. The weighted open loop power controller includes a power measurement device, a pathloss estimation device configured to receive an interpreted power level from the data estimation device and estimate the pathloss and update a long term average of the pathloss, a quality measurement device, and a transmit power calculation device for determining the transmitter's power level and to control the receiver's amplifier.

대표청구항 ▼

What is claimed is: 1. A weighted open loop power control transmitter for controlling transmission power levels using a spread spectrum time division duplex (TDD) technique having frames with timeslots for communication, the transmitter comprising: a demodulator configured to receive the transmitted modulated communication burst and generate a baseband signal; a channel estimation device configured to receive the baseband signal and extract channel information from the baseband signal; a data estimation device configured to interpret the power level of the communication burst; a weighted open loop power controller, the weighted open loop power controller comprising: a power measurement device configured to receive the extracted channel information from the channel estimation device, a pathloss estimation device configured to receive the interpreted power level from the data estimation device and estimate the pathloss (L) and update a long term average of the pathloss (L0) between a receiver and the transmitter, a quality measurement device configured to determine the quality of the estimated pathloss and weight the estimated pathloss by a weighting factor (α), and a transmit power calculation device, wherein the transmit power calculation device is configured to determine the transmitter's power level and to control the receiver's amplifier. 2. The transmitter of claim 1, wherein the transmit power calculation device determines the transmitter's power level by adding a desired receiver power level to a(L-L0) to L0 to a constant value.

이 특허에 인용된 특허 (22) 인용/피인용 타임라인 분석

Soliman Samir S., Accurate open loop power control in a code division multiple access communication system.
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Bark, Gunnar; Rimhagen, Thomas; Muller, Walter, Adaptive power control in a radio communications systems.
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Lomp Gary R., Adjusting a transmitter power level for a spread spectrum transmitter.
상세보기
Haartsen, Jacobus Cornelis; Mattisson, Sven, Automatic power control in uncoordinated frequency-hopping radio systems.
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Ramesh, Rajaram; Wang, Yi-Pin Eric, Channel estimates in a CDMA system using power control bits.
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Bringby Daniel,SEX ; Lundborg Tomas,SEX, Initial transmit power determination in a radiocommunication system.
상세보기
Soliman Samir S., Load monitoring and management in a CDMA wireless 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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Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA), Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone 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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Hakkinen Hannu,FIX, Method and apparatus for controlling transmission power of a radio transmitter.
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Fredrik Gunnarsson SE; Jonas Blom SE; Fredrik Gustafsson SE, Method and system for quality-based power control in cellular communications systems.
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Chuah Mooi Choo, Method for establishment of the power level for uplink data transmission in a multiple access system for communications networks.
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Hottinen Ari,FIX ; Keskitalo Ilkka,FIX ; Kiema Arto,FIX ; Jolma Petri,FIX ; Kuhn Ingo,FIX ; Savusalo Jari,FIX ; Uola Risto,FIX ; Siira Anne,GBX ; Karkkainen Ari,FIX, Method for estimating received power and a receiver.
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Ivanov Kolio (Munich DEX) Metzner Norbert (Treuchtlingen DEX), Method for transmission power control of a mobile station.
상세보기
Juntti Juhani (Puuppola FIX), Power control apparatus and method for a radiotelephone.
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Mallinckrodt Albert Jack, Power control of an integrated cellular communications system.
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McDavid William T. (Allen TX) Bryce William W. (Dallas TX), Power leveling telemetry system.
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Paul E. Bender ; Roberto Padovani, Synchronization of forward link base station power levels during handoff between base station sectors in a mobile radio communication system.
상세보기
Zeira, Ariela; Shin, Sung-Hyuk, Weighted open loop power control.
상세보기
Zeira, Ariela; Shin, Sung-Hyuk, Weighted open loop power control in a time division duplex communication system.
상세보기
Zeira,Ariela; Shin,Sung Hyuk, Weighted open loop power control system.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Weighted open loop power control transmitter cross reference to related applications 원문보기