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公开(公告)号：DE69731186T2
公开(公告)日：2006-03-09
申请号：DE69731186
申请日：1997-02-06
Applicant: QUALCOMM INC
Inventor： DEAN F , WEAVER A , WHEATLEY E
Abstract: The present invention is a method and apparatus for integrating a personal communication system with a cable television plant. A set of radio antenna devices (RAD) are connected to the cable plant. The RADs provide frequency conversion and power control of signal received from the cable plant for wireless transmission to the remote units. The RADs also provide power control and frequency conversion of wireless signals received from the remote units for transmission by the RADs onto the cable plant. In addition to the functions of standard base stations and centralized controller, the CATV base station must also compensate for gain variations in the cable plant. The downstream power control is regulated by a RAD reference signal which can be hidden within the CDMA signal for maximum efficiency. The upstream power control is regulated by an upstream gain reference signal which is individually transmitted by each RAD on the upstream link. The architecture of the present invention lends itself to a great deal of flexibility. Each RAD can operate as either an element of a distributed antenna or a base station sector unto itself. The function of each RAD as distributed antenna or as sector can be remotely programmed from the headend processor. Thus the capacity density of the system can be changed to accommodate the changing traffic density. The flexibility also is important at system deployment. When the system is deploy, the entire system may feed only one sector at the base station thus reducing the start-up cost of implementing a system. As system traffic increases, more resources can simply be added at the headend to provide more capacity.
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公开(公告)号：DE69233552D1
公开(公告)日：2006-02-09
申请号：DE69233552
申请日：1992-05-17
Applicant: QUALCOMM INC
Inventor： GILHOUSEN S , PADOVANI ROBERTO , WHEATLEY E , WEAVER A , BLAKENEY D
IPC: H04J13/00 , H04B7/005 , H04B7/26 , H04L27/30 , H04W52/00 , H04W52/02 , H04W52/06 , H04W52/08 , H04W52/10 , H04W52/12 , H04W52/34 , H04W52/36 , H04W52/40 , H04W52/52
Abstract: A cellular communication system in which a system user and another user communicate with each other by way of information carrying spread spectrum modulated signals transmitted via a cell-site in which system: the system user comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said cell-site, a receiver for receiving information carrying spread spectrum modulated signals from said cell-site and means for measuring signal quality in said information carrying spread spectrum modulated signals received by the system user; the cell-site comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said system user, a receiver for receiving information carrying spread spectrum modulated signals from said system user and adjusting means for adjusting the power of information carrying spread spectrum modulated signals transmitted from the cell-site ; ; and power control means is provided for controlling the transmission power of the information carrying spread spectrum modulated signals by measuring the signal power in the information carrying spread spectrum modulated signals received by the system user and transmitting data representing the measured power to the cell-site by way of the information carrying spread spectrum modulated signals, the adjusting means being responsive to the data in the information carrying spread spectrum modulated signals from the system user to adjust the power in the information carrying spread spectrum modulated signals transmitted by the cell-site.
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公开(公告)号：DE69333633T2
公开(公告)日：2005-12-01
申请号：DE69333633
申请日：1993-03-04
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , WEAVER A , KERR J , GEIB M
IPC: H04J3/16 , H04B1/16 , H04B7/26 , H04W24/00 , H04W48/08 , H04W52/02 , H04W56/00 , H04W72/04 , H04W72/12 , H04W74/04
Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.
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公开(公告)号：DE69433459T2
公开(公告)日：2004-11-04
申请号：DE69433459
申请日：1994-10-28
Applicant: QUALCOMM INC
Inventor： BLAKENEY D , WEAVER A , ZIV A , WILLIAMSON T , PADOVANI ROBERTO
IPC: H04B1/7087 , H04B1/7117 , H04B7/08 , H04B7/26 , H04J13/00
Abstract: In a receiver having a plurality of demodulation elements, a method of assigning the plurality of demodulation element so a set of available signals. A first method emphasizes diversity of transmitting devices so that power control is optimal. A second method emphasizes the maximum signal strength available to produce aggregate maximum signal strength. Both methods control the number of reassignments so that excessive data is not lost during the reassignment process. The apparatus comprises the plurality of demodulation elements, at least one searcher element, and a controller.
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Patent Agency Ranking
公开(公告)号：DE69532156D1
公开(公告)日：2003-12-24
申请号：DE69532156
申请日：1995-09-12
Applicant: QUALCOMM INC
IPC: H04B7/005 , H04B7/26 , H04W16/06 , B60S5/04 , H04W36/18 , H04W52/40 , H04W52/52 , H04Q7/36 , H04Q7/30
Abstract: An apparatus and method for adding and removing a target base station from a network of base stations, which includes base stations adjacent the target base station. The apparatus is comprised of two attenuators: a first for setting an artificial receive noise power level and a second for setting a transmit level. The transmit level determines the forward link coverage area of the base station. The artificial noise level sets the reverse link coverage area of the base station. When a base station is added, initially the transmit power is low and the artificial receive noise power is high such that the forward and reverse link coverage areas are collocated in close proximity to the base station. As the base station blossoms into full operation, the artificial receive noise power is decreased and the transmit level is increased such that the two coverage areas of the base station remain balanced as the coverage areas expand. When a base station is to be removed from a system, the same attenuators are used to wilt the two coverage areas in unison as the power level transmitted from the base station decreases.
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公开(公告)号：DE69620585T2
公开(公告)日：2002-11-28
申请号：DE69620585
申请日：1996-01-25
Applicant: QUALCOMM INC
Abstract: When one vocoding system is coupled to another vocoding system, a tandem arrangement results. The tandem configuration results in voice quality degradation as speech is encoded and decoded, then encoded and decoded again. One reason for the degradation is that postfiltering performed at the output of the speech decoding process introduces distortions in the spectral content of the reconstructed speech as compared to the original speech. The present invention prevents the degradation due to the use of postfilters by modifying the postfiltering within the vocoders where a tandem configuration exists. A detection code is embedded within the data signal to indicate the existence of a tandem configuration. If the detection code is received at a vocoder, modified vocoding is established within the vocoders to prevent the degradation due to the postfiltering.
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公开(公告)号：DE69620585D1
公开(公告)日：2002-05-16
申请号：DE69620585
申请日：1996-01-25
Applicant: QUALCOMM INC
Abstract: When one vocoding system is coupled to another vocoding system, a tandem arrangement results. The tandem configuration results in voice quality degradation as speech is encoded and decoded, then encoded and decoded again. One reason for the degradation is that postfiltering performed at the output of the speech decoding process introduces distortions in the spectral content of the reconstructed speech as compared to the original speech. The present invention prevents the degradation due to the use of postfilters by modifying the postfiltering within the vocoders where a tandem configuration exists. A detection code is embedded within the data signal to indicate the existence of a tandem configuration. If the detection code is received at a vocoder, modified vocoding is established within the vocoders to prevent the degradation due to the postfiltering.
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公开(公告)号：DE69605953T2
公开(公告)日：2000-08-17
申请号：DE69605953
申请日：1993-01-19
Applicant: QUALCOMM INC
Inventor： PADOVANI ROBERTO , TIEDEMANN G , WEAVER A , BUTLER K
IPC: C02F5/10 , H04L27/20 , C08L33/02 , C08L35/00 , C08L51/02 , C08L77/04 , C11D3/37 , H04B7/00 , H04J3/16 , H04J3/22 , H04J3/24 , H04J11/00 , H04J13/00 , H04J13/18 , H04L20060101 , H04L1/00 , H04L1/08 , H04L12/00 , H04L27/30 , H04L29/06 , H04Q7/38
Abstract: The invention relates to a communication system in which transmission takes place according to a format which permits different types of data to be combined and transmitted within a single transmission. The novel feature is that the communication system transmits variable length frames of data in packets, and that a data combining and transmission sub-system (14, 16, 18, 20) is provided so that when a frame of data does not require a complete packet for transmission, the data combining sub-system combines the frame of data with additional data to provide a complete packet. The data combining sub-system comprises input means for receiving the frame of data and the additional data and for combining the frame of data and the additional data to provide a complete packet responsive to a control signal, and control means for providing the control signal.
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