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公开(公告)号：DE69836097T2
公开(公告)日：2007-05-16
申请号：DE69836097
申请日：1998-11-30
Applicant: QUALCOMM INC
Inventor： ODENWALDER P , LUNDBY A , WHEATLEY E , TIEDEMANN G
Abstract: A method and apparatus for providing diversity transmissions to a mobile unit from a transmitting station having at least first and second antennas by repeatedly switching between the two antennas during the transmission of information to the receiving unit. Message information is transmitted from the first antenna in the transmitting station to the receiving unit. After the start of the transmission of the message information from the first antenna, transmission of the message information from the first antenna to the receiving unit terminates and transmission of the message information from the second antenna in the transmitting station to the receiving unit is initiated. Some time after transmission of the message information from second antenna is initiated, the transmission of the message information from the second antenna to the receiving unit terminates and transmission of the message information from the first antenna in the transmitting station to the receiving unit is initiated. Repeated switching between the first and second antennas is achieved by repeating the process. The switching results in diversity transmissions that improve the ability of a receiving unit to receive the coded and interleaved transmitted message information from the transmitting station. The interleaver disperses the encoded symbols in each antenna dwell period such that the decoder decisions are based on a mix of symbols form each antenna. Therefore the decoder decisions are unreliable only when the mix of symbols from the different antennas, with different fading characteristics, are unreliable over the span of symbols the decoder uses in its decision process.
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公开(公告)号：DE69934496D1
公开(公告)日：2007-02-01
申请号：DE69934496
申请日：1999-07-27
Applicant: QUALCOMM INC
Inventor： WHEATLEY E , TIEDEMANN G , ODENWALDER P , KRISHNAMURTHI RAJEEV
Abstract: A method and system for operation of a personal base station where the forward link of a personal base station is on the same frequency assignment as a first forward link data signal transmitted by a macro base station belonging to a cellular communication system. A first subscriber station communicates with the macro base station. The personal base station generates a second forward link data signal and communicates with a second subscriber station. The personal base station receives the first forward link data signal and combines it with its own second forward link data signal to form a combined forward link data signal. The personal base station then transmits the combined forward link data signal. The first subscriber station is able to receive and diversity combine the combined forward link data signal, improving the signal to noise ratio that would otherwise occur in the vicinity of the personal base station.
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公开(公告)号：DE69533665D1
公开(公告)日：2004-11-25
申请号：DE69533665
申请日：1995-07-05
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , GILHOUSEN S , ODENWALDER P , ZEHAVI EPHRAIM , LEVIN A , WHEATLEY E
Abstract: A method and apparatus for controlling transmission power in a variable rate communication system is disclosed. The method disclosed provides for a closed loop power control method. A first remote station controls the transmission power of a second remote station by transmitting a rate dependent power control signal to the second remote communication station. Since only the second communication knows its transmission rate a priori, it must determine its course of action in accordance with both the received power control signal and the knowledge of its transmission rate.
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公开(公告)号：DE69837101T2
公开(公告)日：2007-10-31
申请号：DE69837101
申请日：1998-11-03
Applicant: QUALCOMM INC
Inventor： PADOVANI ROBERTO , SINDHUSHAYANA T , WHEATLEY E , BENDER E , BLACK J , GROB MATTHEW , HINDERLING K
IPC: H04W40/16 , H04B1/7103 , H04B7/005 , H04L1/00 , H04L1/08 , H04L1/16 , H04L1/18 , H04L12/56 , H04L29/08 , H04W16/14 , H04W24/00 , H04W28/22 , H04W52/04 , H04W52/12 , H04W52/24 , H04W52/26 , H04W52/40 , H04W72/08
Abstract: In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.
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公开(公告)号：DE69533665T2
公开(公告)日：2006-02-16
申请号：DE69533665
申请日：1995-07-05
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , GILHOUSEN S , ODENWALDER P , ZEHAVI EPHRAIM , LEVIN A , WHEATLEY E
Abstract: A method and apparatus for controlling transmission power in a variable rate communication system is disclosed. The method disclosed provides for a closed loop power control method. A first remote station controls the transmission power of a second remote station by transmitting a rate dependent power control signal to the second remote communication station. Since only the second communication knows its transmission rate a priori, it must determine its course of action in accordance with both the received power control signal and the knowledge of its transmission rate.
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Patent Agency Ranking
公开(公告)号：DE69433529D1
公开(公告)日：2004-03-11
申请号：DE69433529
申请日：1994-11-22
Applicant: QUALCOMM INC
Inventor： WHEATLEY E , PADOVANI ROBERTO , ZEHAVI EPHRAIM
Abstract: A method for providing power control with variable data rate, the method comprising: receiving a data frame having an input data rate selected from a plurality of possible input data rates; selecting an encoding rate based on the input data rate; encoding data frames to produce output symbols, repeating output symbols using first and second generating polynomials and multiplexing the repeated output symbols, selecting a puncturing format to puncture data bits and producing output data having a constant output data rate for a number of possible input data rates based on a combination of input data rates, selected encoding rate and selected puncturing format for providing said variable data rate communication link; determining a frame error rate for a number of possible input data rates; calculating differences between the frame error rates and a target error rate and adjusting the power depending on whether the difference is greater, equal or less than a predetermined threshold.
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公开(公告)号：DE60005797D1
公开(公告)日：2003-11-13
申请号：DE60005797
申请日：2000-01-28
Applicant: QUALCOMM INC
Inventor： CHEN TAO , HOLTZMAN M , SAINTS KEITH , WHEATLEY E , LING FUYUN , SINDHUSHAYANA NAGABHUSHANA
Abstract: A power control system for controlling the transmission power in a system wherein the transmission power may be gated or capped. The receiver employs a combination of closed loop and outer loop power control. The outer loop is frozen upon detection by the receiver that the signal has been capped or gated.
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公开(公告)号：DE69433529T2
公开(公告)日：2004-12-16
申请号：DE69433529
申请日：1994-11-22
Applicant: QUALCOMM INC
Inventor： WHEATLEY E , PADOVANI ROBERTO , ZEHAVI EPHRAIM
Abstract: A method for providing power control with variable data rate, the method comprising: receiving a data frame having an input data rate selected from a plurality of possible input data rates; selecting an encoding rate based on the input data rate; encoding data frames to produce output symbols, repeating output symbols using first and second generating polynomials and multiplexing the repeated output symbols, selecting a puncturing format to puncture data bits and producing output data having a constant output data rate for a number of possible input data rates based on a combination of input data rates, selected encoding rate and selected puncturing format for providing said variable data rate communication link; determining a frame error rate for a number of possible input data rates; calculating differences between the frame error rates and a target error rate and adjusting the power depending on whether the difference is greater, equal or less than a predetermined threshold.
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公开(公告)号：DE69627529T2
公开(公告)日：2004-03-04
申请号：DE69627529
申请日：1996-12-26
Applicant: QUALCOMM INC
Inventor： KORNFELD K , WHEATLEY E , CAMARILLO J , WHITE W
IPC: H03F99/00 , H03F1/02 , H03F1/32 , H03F3/60 , H03F3/68 , H03F3/72 , H03G3/02 , H03G3/30 , H04B1/04 , H04B7/26 , H04J13/00
Abstract: An amplifier circuit for providing an amplified signal in response to an input signal. The amplifier circuit includes an input network for applying the input signal to a selected at least one of a plurality of amplifier stages. An output network is provided for coupling the amplified signal from the selected at least one amplifier stage. The appropriate amplifier stage is selected by a control circuit in response to a desired power value of the amplified signal. By selectively activating only the amplifier stage(s) that are necessary to provide the desired level of output power, increased DC efficiency can be accomplished in applications that require an amplifier which operates linearly over a wide dynamic range.
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公开(公告)号：DE69133017D1
公开(公告)日：2002-06-27
申请号：DE69133017
申请日：1991-06-21
Applicant: QUALCOMM INC
Inventor： GILHOUSEN S , JACOBS M , PADOVANI ROBERTO , WEAVER A , WHEATLEY E , VITERBI J
IPC: H04B1/707 , H04B1/7075 , H04B1/709 , H04B1/7115 , H04B7/005 , H04B7/26 , H04J3/02 , H04J3/16 , H04J3/22 , H04J11/00 , H04J13/00 , H04J13/10 , H04J13/18 , H04L20060101 , H04L1/00 , H04L1/06 , H04L1/08 , H04L5/02 , H04L5/12 , H04L23/02 , H04L27/30 , H04W52/26
Abstract: A cell site, comprising: means for modulating configured to format digital data for transmission on a communications channel and to insert at least one timing command into the digital data, the digital data comprising a plurality of bits; means for transmitting coupled to the means for modulating and configured to receive the digital data from the means for modulating, convert the digital data to analog data, and transmit the analog data on the communications channel; and means for receiving configured to receive a signal from at least one remote unit and to determine a timing error of the received signal to be used to generate the timing command in accordance with the timing error, the means for receiving being coupled to the means for modulating and configured to provide the timing command to the means for modulating.
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