公开(公告)号：WO1993014588A1

公开(公告)日：1993-07-22

申请号：PCT/US1993000406

申请日：1993-01-19

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  PADOVANI, Roberto ,  TIEDEMANN, Edward, G., Jr. ,  WEAVER, Lindsay, A., Jr. ,  BUTLER, Brian, K.

IPC: H04L27/30

CPC classification number: H04L1/0057 ,  H04J3/1688 ,  H04J3/22 ,  H04J3/24 ,  H04J13/0048 ,  H04J13/18 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/08

Abstract: In a CDMA cellular communication system, a forward CDMA channel is used to transmit information from a cell base to the mobile station. Conversely, a reverse CDMA channel is used to transmit information from the mobile station to the cell base station. The transmit portion of the mobile transceiver includes a microphone (12), a codec (16), a vocoder (14), a mask circuit (32), a convolutional encoder (22), a block interleaver (24), a 64-ary orthogonal modulator, an in-phase PN generator (38), a quadrature PN generator (40), filtering circuits (42, 44, 50, 52), a quadrature modulator (54) and a transmitter (56).

Abstract translation: 在CDMA蜂窝通信系统中，前向CDMA信道被用于从小区基站向移动台发送信息。 相反，使用反向CDMA信道来将信息从移动台传送到小区基站。 移动收发器的发送部分包括麦克风（12），编解码器（16），声码器（14），掩码电路（32），卷积编码器（22），块交织器（24） 同相PN发生器（38），正交PN发生器（40），滤波电路（42,44,50,52），正交调制器（54）和发射机（56）。

公开(公告)号：EP1938645B1

公开(公告)日：2017-06-14

申请号：EP06802172.4

申请日：2006-08-22

Applicant: Qualcomm Incorporated

Inventor： SMEE, John Edward ,  HOU, Jilei ,  PADOVANI, Roberto ,  BLACK, Peter John ,  EASTON, Kenneth, David

IPC: H04B1/7107

CPC classification number: H04B1/7107 ,  H04W52/12

公开(公告)号：EP1938645A2

公开(公告)日：2008-07-02

申请号：EP06802172.4

申请日：2006-08-22

Applicant: Qualcomm Incorporated

Inventor： SMEE, John Edward ,  HOU, Jilei ,  PADOVANI, Roberto ,  BLACK, Peter John ,  EASTON, Kenneth, David

IPC: H04Q7/38

CPC classification number: H04B1/7107 ,  H04W52/12

Abstract: A method and system for reverse link interference cancellation. One method comprises demodulating and decoding at least one signal sent from at least one access terminal and received by a first base station, sending demodulated, decoded information of the signal to a second base station, reconstructing the signal at the second base station, and subtracting the reconstructed signal from a buffer at the second base station.

公开(公告)号：EP1029403B1

公开(公告)日：2007-09-05

申请号：EP98959389.2

申请日：1998-11-07

Applicant: QUALCOMM INCORPORATED

Inventor： SINDHUSHAYANA, Nagabhushana, T. ,  PADOVANI, Roberto

IPC: H04L1/12

CPC classification number: H04W28/18 ,  H04L1/0007 ,  H04L1/0018

Abstract: A method for assigning optimal packet lengths in a variable rate communication system capable of data transmission at one of a plurality of data rates. The packet lengths for the data rates are selected such that the maximum throughput rate is achieved while conforming to a fairness criteria. The fairness criteria can be achieved by restricting the packet length assigned to each data rate to a range of value, or Limin ≤ L¿i? ≤ Li?max¿. The packet lengths for all data rates are first initialized to the maximum packet lengths for those data rates. Then, for each date rate, a determination is made whether another packet length assignment would result in improved throughput rate. If the answer is yes, the packet length for this data rate is reassigned and the throughput rate with the updates packet length assignments is recomputed. The process is repeated for each data rate until all data rates have been considered. The throughput rate can be calculated using a probabilistic model or a deterministic model.4

公开(公告)号：EP1226665B1

公开(公告)日：2007-08-08

申请号：EP00982073.9

申请日：2000-10-31

Applicant: QUALCOMM INCORPORATED

Inventor： PADOVANI, Roberto ,  BLACK, Peter, J. ,  SINDHUSHAYANA, Nagabhushana, T.

IPC: H04B7/26 ,  H04J13/02

CPC classification number: H04J13/00 ,  H04B7/2668 ,  H04B7/2693 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04L7/041 ,  H04W56/00

Abstract: A pilot reference transmission scheme well suited for high data rate wireless communication systems. To maximize the amount of interference from transmissions from neighboring transmission sources (e.g., access points or base stations) during the pilot interval, and hence minimize the amount of interference from non-transmitting sources during the data intervals, the pilot references are transmitted in bursts at predetermined time intervals, and the pilot bursts from the access points are synchronized. This results in maximum interference contributions from non-transmitting neighboring access points, facilitating reliable estimation of worst case carrier-to-interference (C/I), and further allows the receiving devices (e.g., access terminals) to easily recognize the bursts as pilot reference. Each access point transmits the pilot bursts at or near its maximum transmit power level and no user-specific data is transmitted during the pilot bursts. As a result, the pilot bursts are received at the access terminals only in the presence of pilots from other access points and are not affected by other data transmissions. This results in a signal-to-noise ratio for the pilot reference that represents the minimum signal-to-noise ratio during the data transmission from the given access point, which aids in rapid and reliable estimation of worst case C/I.

公开(公告)号：EP1192749B1

公开(公告)日：2007-04-11

申请号：EP00945128.7

申请日：2000-06-30

Applicant: QUALCOMM INCORPORATED

Inventor： BENDER, Paul, E. ,  GROB, Matthew, Stuart ,  KARMI, Gadi ,  PADOVANI, Roberto

IPC: H04L1/00 ,  H04Q7/38 ,  H04B7/26

CPC classification number: H04W28/22 ,  H04B7/264 ,  H04L1/0002 ,  H04W28/08 ,  H04W52/40

Abstract: Reverse link busy bits are independently generated by each base station (102, 104 and 106) and indicative of whether the transmitting base station (102, 104 and 106) has reached a reserve link capacity limit. In a first exemplary embodiment, the remote station (122) combines the multipath components of the reverse link busy bits from each of the transmitting base stations (102, 104 and 106) in its Active Set and in response transmits a reverse link signal only when all of the reverse link busy bits indicate that the base stations (102, 104 and 106) in the remote stations Active Set have reverse link capacity. In a first alternative embodiment, the remote station weights, the reverse link busy signals in accordance with the signal strength of the base station (102, 104 or 106) transmitting the busy signal and determines whether to transmit based on the weighted sum of the busy signals.

公开(公告)号：EP0917809B1

公开(公告)日：2006-04-19

申请号：EP97938147.2

申请日：1997-08-06

Applicant: QUALCOMM INCORPORATED

Inventor： PADOVANI, Roberto

IPC: H04Q7/38 ,  H04Q7/22

CPC classification number: H04W36/30 ,  H04W36/0066 ,  H04W36/18

Abstract: In a communications network, a network user communicates through a remote unit (155) via at least one base station (150). The communications network includes a first mobile switching center (100) for controlling communications through a first set of base stations (102) and a second mobile switching center (112) for controlling communications through a second set of base stations (108). The network also includes a service providing base station (102D) controlled by the first mobile switching center (100) and providing service to a first transition coverage area using a first pseudorandom noise code. The first transition coverage area defines a boundary between a first system (102) controlled by the first mobile switching center (100) and a second system (108) controlled by the second mobile switching center (112). The network further includes a passage providing base station controlled (108D) by the second mobile switching center (112) for providing service to the first transition area using a second pseudorandom noise code offset in time by a first amount from the first pseudorandom noise code. The passage providing base station provides service to a remote unit (155) only if the remote unit (155) is entering the first transition coverage area while exiting the second system or is about to exit the first transition coverage area while entering the second system.

公开(公告)号：EP1295497A2

公开(公告)日：2003-03-26

申请号：EP01951086.6

申请日：2001-06-18

Applicant: QUALCOMM INCORPORATED

Inventor： PADOVANI, Roberto ,  BENDER, Paul, E. ,  JALALI, Ahmad ,  JUDSON, Bruce ,  WHEATLEY, Charles, E., III

IPC: H04Q7/36 ,  H04B7/26

CPC classification number: H04W16/12 ,  H04W16/02

Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.

公开(公告)号：EP1273121A1

公开(公告)日：2003-01-08

申请号：EP01927018.0

申请日：2001-04-13

Applicant: QUALCOMM INCORPORATED

Inventor： ATTAR, Rashid ,  PADOVANI, Roberto ,  BLACK, Peter, J. ,  SINDHUSHAYANA, Nagabhushana, T. ,  ESTEVES, Eduardo, A., S. ,  GURELLI, Mehmet

IPC: H04L1/00 ,  H04L1/16 ,  H04L1/18

CPC classification number: H04L1/189 ,  H04L1/0001 ,  H04L1/002 ,  H04L1/0025 ,  H04L1/0028 ,  H04L1/1671 ,  H04L1/1809 ,  H04L1/1812 ,  H04L1/1838

Abstract: In a high data rate communication system, a method and apparatus for improved throughput while transmitting data packets within multiple time slots. In order to avoid unnecessary retransmissions of a packet, a subscriber station sends a Stop-Repeat signal to a base station, causing the base station to cease further transmissions of the packet. In order to enable successful decoding of a packet, a subscriber station sends a Continue-Repeat signal to a base station, causing the base station to send retransmissions of the packet during time slots beyond a predetermined default number of time slots.

公开(公告)号：EP1226665A1

公开(公告)日：2002-07-31

申请号：EP00982073.9

申请日：2000-10-31

Applicant: QUALCOMM INCORPORATED

Inventor： PADOVANI, Roberto ,  BLACK, Peter, J. ,  SINDHUSHAYANA, Nagabhushana, T.

IPC: H04B7/26 ,  H04J13/02

CPC classification number: H04J13/00 ,  H04B7/2668 ,  H04B7/2693 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04L7/041 ,  H04W56/00

Abstract: A pilot reference transmission scheme well suited for high data rate wireless communication systems. To maximize the amount of interference from transmissions from neighboring transmission sources (e.g., access points or base stations) during the pilot interval, and hence minimize the amount of interference from non-transmitting sources during the data intervals, the pilot references are transmitted in bursts at predetermined time intervals, and the pilot bursts from the access points are synchronized. This results in maximum interference contributions from non-transmitting neighboring access points, facilitating reliable estimation of worst case carrier-to-interference (C/I), and further allows the receiving devices (e.g., access terminals) to easily recognize the bursts as pilot reference. Each access point transmits the pilot bursts at or near its maximum transmit power level and no user-specific data is transmitted during the pilot bursts. As a result, the pilot bursts are received at the access terminals only in the presence of pilots from other access points and are not affected by other data transmissions. This results in a signal-to-noise ratio for the pilot reference that represents the minimum signal-to-noise ratio during the data transmission from the given access point, which aids in rapid and reliable estimation of worst case C/I.