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公开(公告)号：HK1025850A1
公开(公告)日：2000-11-24
申请号：HK00104995
申请日：2000-08-10
Applicant: QUALCOMM INC
Inventor： TIEDEMANN EDWARD G JR , SAINTS KEITH W
IPC: C08L23/04 , C08L23/06 , C08L23/08 , C08L23/10 , C08L23/12 , C08L23/16 , H04B1/04 , H04B7/005 , H04B7/26 , H04W52/08 , H04W52/24 , H04W52/40 , H04B
Abstract: A forward link power control mechanism in a remote station (6) measures reverse link power control bits which are transmitted by one or more base stations (4a, 4b, 4n) on a forward traffic channel (10a). At the remote station (6) the reverse link power control bits from multiple base stations (4a, 4b, 4n) or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link (12a, 12b) power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station (6) generates a set of forward link power control bits in accordance with the measurements and transmits these bits to all base stations (4a, 4b, 4n) in communication with the remote station (6). Each base station (4a, 4b, 4n) adjusts its gain of the forward traffic channel (10a) in accordance to its measurement of the forward link power control bit. The gains of the forward traffic channels (10a) of the base stations (4a, 4b, 4n) are corrected periodically so that erroneous reception of the forward link power control bits by the base stations do not accumulate.
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公开(公告)号：NO20005597D0
公开(公告)日：2000-11-06
申请号：NO20005597
申请日：2000-11-06
Applicant: QUALCOMM INC
Inventor： CHEN TAO , SAINTS KEITH W , TIEDEMANN JR EDWARD G , GLAUSER OLIVIER
Abstract: A method and apparatus for coordinating the time at which a mobile station (5) performs searches for alternative systems to which a hard handoff will occur. In one system which includes the present invention, the mobile station (5) receives a command which instructs the mobile station (5) as to when to tune to alternative frequencies in order to search for indications of the presence of an alternative system. In another system which includes the present invention, predetermined times are defined with respect to a reference point in time that is common to both an origination base station (10) and a mobile station (5). The mobile station (5) tunes to alternative frequencies to perform searches only during these predetermined times. In addition, the mobile station (5) coordinates the transmission of reports which indicate the results of searches for alternative systems such that these reports are only transmitted from the mobile station (5) when the mobile station (5) is tuned to the origination frequency.
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公开(公告)号：BR9808986A
公开(公告)日：2000-08-08
申请号：BR9808986
申请日：1998-04-16
Applicant: QUALCOMM INC
Inventor： TIEDEMENN EDWARD G JR , SAINTS KEITH W
IPC: C08L23/04 , C08L23/06 , C08L23/08 , C08L23/10 , C08L23/12 , C08L23/16 , H04B1/04 , H04B7/005 , H04B7/26 , H04W52/08 , H04W52/24 , H04W52/40
Abstract: A forward link power control mechanism in a remote station (6) measures reverse link power control bits which are transmitted by one or more base stations (4a, 4b, 4n) on a forward traffic channel (10a). At the remote station (6) the reverse link power control bits from multiple base stations (4a, 4b, 4n) or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link (12a, 12b) power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station (6) generates a set of forward link power control bits in accordance with the measurements and transmits these bits to all base stations (4a, 4b, 4n) in communication with the remote station (6). Each base station (4a, 4b, 4n) adjusts its gain of the forward traffic channel (10a) in accordance to its measurement of the forward link power control bit. The gains of the forward traffic channels (10a) of the base stations (4a, 4b, 4n) are corrected periodically so that erroneous reception of the forward link power control bits by the base stations do not accumulate.
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公开(公告)号：BR9713706A
公开(公告)日：2000-05-09
申请号：BR9713706
申请日：1997-12-11
Applicant: QUALCOMM INC
Inventor： ZEHAVI EPHRAIM , TIEDEMANN EDWARD G JR , SAINTS KEITH W
Abstract: A subchannel within a CDMA signal is provided together with a system for receiving and decoding this subchannel. A message is transmitted over the subchannel by applying a sequence of phase rotations to the user data. A single subchannel message can be transmitted during each 1.25 ms segment of user data, resulting in a transmission rates of up to 800 messages per second over the subchannel. Each message corresponds to a fixed sequence of phases, called a phase codeword, used to rotate the user data each time that message is sent. When only two phase codewords are used, the effective data rate for the subchannel is 800 bits per second, but higher data rates may be achieved by increasing the number of codewords used by the subchannel. The subchannel may be decoded by correlating the user data with each of the possible phase codewords.
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公开(公告)号：ZA9807691B
公开(公告)日：1999-07-02
申请号：ZA9807691
申请日：1998-08-25
Applicant: QUALCOMM INC
Inventor： SAINTS KEITH W , TIEDEMANN EDWARD G JR
CPC classification number: H04W52/42
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Patent Agency Ranking
公开(公告)号：NO991497L
公开(公告)日：1999-05-25
申请号：NO991497
申请日：1999-03-26
Applicant: QUALCOMM INC
Inventor： SAINTS KEITH W
Abstract: The present invention is a method and apparatus for providing a received signal quality metric which is optimally designed to control the transmission power of a transmitter in a closed loop power control system. The present invention is described in the context of a spread spectrum communication system but it is equally applicable to other types of communication systems. In the present invention, the power control system is described for controlling the power of transmissions from a base station to a mobile station, referred to as forward link transmissions.
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公开(公告)号：CA2638956C
公开(公告)日：2012-12-04
申请号：CA2638956
申请日：1999-04-30
Applicant: QUALCOMM INC
Inventor： CHEN TAO , TIEDEMANN EDWARD G , SAINTS KEITH W , GLAUSER OLIVIER
IPC: H04W88/08 , H03M13/05 , H03M13/23 , H03M13/27 , H04L12/00 , H04W28/04 , H04W36/00 , H04W36/08 , H04W36/14 , H04W36/38 , H04W52/06 , H04W88/02 , H04W88/12
Abstract: A method and apparatus for coordinating the time at which a mobile station (5) performs searches for alternative systems to which a hard handoff will occur. In one system which includes the present invention, the mobile station (5) receives a command which instructs the mobile station (5) as to when to tune to alternative frequencies in order to search for indications of the presence of an alternative system. In another system which includes the present invention, predetermined times are defined with respect to a reference point in time that is common to both an origination base station (10) and a mobile station (5). The mobile station (5) tunes to alternative frequencies to perform searches only during these predetermined times. In addition, the mobile station (5) coordinates the transmission of reports which indicate the results of searches for alternative systems such that these reports are only transmitted from the mobile station (5) when the mobile station (5) is tuned to the origination frequency.
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公开(公告)号：DE69936671T3
公开(公告)日：2011-06-09
申请号：DE69936671
申请日：1999-04-30
Applicant: QUALCOMM INC
Inventor： CHEN TAO , TIEDEMANN EDWARD G JR , SAINTS KEITH W , GLAUSER OLIVIER
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公开(公告)号：NO328894B1
公开(公告)日：2010-06-07
申请号：NO20034052
申请日：2003-09-12
Applicant: QUALCOMM INC
Inventor： SAINTS KEITH W , SINDHUSHAYANA NAGABHUSHANA T , HOLTZMAN JACK M , LING FUNYUN , CHEN TAO , WHEATLEY III CHARLES E
Abstract: Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics include one of a re-encoded power metric and a modified Yamamoto metric. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.
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公开(公告)号：DE602004013592D1
公开(公告)日：2008-06-19
申请号：DE602004013592
申请日：2004-07-12
Applicant: QUALCOMM INC
Inventor： CHEN TAO , ACHOUR BAAZIZ , BUTLER BRIAN K , TIEDEMANN EDWARD G , ZHANG HAITAO , SAINTS KEITH W , BLESSENT LUCA , WEI YONGBIN
Abstract: A dynamic shared forward link channel (or “data” channel) is used to send multicast data to a group of wireless devices, e.g., using a common long code mask for the data channel. Reference power control (PC) bits are also sent on the data channel and used for signal quality estimation. A shared forward link control channel is used to send user-specific signaling to individual wireless devices, e.g., using time division multiplexing (TDM) and a unique long code mask for each wireless device. A shared forward link indicator channel is used to send reverse link (RL) PC bits to the wireless devices, e.g., using TDM. The data channel is jointly power controlled by all wireless devices receiving the data channel. The control and indicator channels are individually power controlled by each wireless device such that the signaling and RL PC bits sent on these channels for the wireless device are reliably received.
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