公开(公告)号：EP1135875B1

公开(公告)日：2007-07-11

申请号：EP99965114.4

申请日：1999-12-03

申请人： QUALCOMM INCORPORATED

发明人： WALLACE, Mark, S. ,  TIEDEMANN, Edward, G., Jr. ,  WHEATLEY, Charles, E., III ,  WALTSON, J., Rod

IPC分类号： H04B7/26

CPC分类号： H04B7/2696

摘要： When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations (602, 604). This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations (602, 604). Given knowledge of the other base station locations, time errors relative to all other base stations (602, 604) may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of-arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a base station (602, 604) may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable. In this case, a fixed mobile (606) is placed at a location in the handoff region between the isolated cell and another cell in the network. The fixed mobile (606) either performs measurements of base station pilots on command of the base and reports the timing information, or sends a burst transmission at a specified time and power level to be measured by the base stations.

公开(公告)号：EP0870361B1

公开(公告)日：2003-04-16

申请号：EP96944497.5

申请日：1996-12-26

申请人： QUALCOMM INCORPORATED

发明人： KORNFELD, Richard, K. ,  WHEATLEY, Charles, E., III ,  CAMARILLO, Richard, J. ,  WHITE, Katherine, W.

IPC分类号： H03F3/60

CPC分类号： H03F3/211 ,  H03F1/0277 ,  H03F1/0288 ,  H03F3/24 ,  H03F3/602 ,  H03F3/72 ,  H03F2200/294 ,  H03F2203/7236 ,  H03G3/3042 ,  H04B1/0483 ,  H04B2001/0408

摘要： An amplifier circuit (40) for providing an amplified signal in response to an input signal. The amplifier circuit (40) includes an input network (44) for applying the input signal to a selected at least one of a plurality of amplifier stages. An output network (48) 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 (56) 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.

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

申请人： QUALCOMM INCORPORATED

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

IPC分类号： H04Q7/36 ,  H04B7/26

CPC分类号： H04W16/12 ,  H04W16/02

摘要： 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：EP1281249A1

公开(公告)日：2003-02-05

申请号：EP01935213.7

申请日：2001-05-08

申请人： QUALCOMM INCORPORATED

发明人： WHEATLEY, Charles, E., III ,  BENDER, Paul, E.

IPC分类号： H04B7/26

CPC分类号： H04J13/00 ,  H04B7/2618 ,  H04J13/0048

摘要： A novel method and apparatus for providing both voice services and data services in a High Data Rate (HDR) wireless communication system. At least one sub-channel is formed on the forward link of the HDR system. The at least one sub-channel comprise at least one time slot that occupies a specified position in a frame of the forward link. The at least one sub-channel is assigned for voice services. The voice services at the at least one sub-channel are provided in accordance with a CDMA principles. Such principles are disclosed e.g., in IS-95, cdma2000, or other standards known to one skilled in the art. The remaining time slots are used for data services. In another aspect of the invention, additional sub-channels are formed, utilizing all remaining time slots. The additional sub-channels are assigned to data services, such that each sub-channel carries data to a different user. The number of sub-channels assigned to voice services, and the number of sub-channels assigned to voice services changes with varying needs for voice services and data services.

公开(公告)号：EP1151555A1

公开(公告)日：2001-11-07

申请号：EP00908417.9

申请日：2000-01-28

申请人： QUALCOMM Incorporated

发明人： CHEN, Tao ,  HOLTZMAN, Jack, M. ,  SAINTS, Keith ,  WHEATLEY, Charles, E., III ,  LING, Fuyun ,  SINDHUSHAYANA, Nagabhushana

IPC分类号： H04B7/005

CPC分类号： H04W52/12 ,  H04W52/08 ,  H04W52/20 ,  H04W52/44

摘要： 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.

公开(公告)号：EP1036438A1

公开(公告)日：2000-09-20

申请号：EP98960575.3

申请日：1998-11-30

申请人： QUALCOMM Incorporated

发明人： ODENWALDER, Joseph, P. ,  LUNDBY, Stein, A. ,  WHEATLEY, Charles, E., III ,  TIEDEMANN, Edward, G., Jr.

IPC分类号： H04B7/06

CPC分类号： H04L1/0057 ,  H04B7/0604 ,  H04L1/0061 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/06

摘要： A method and apparatus for providing diversity transmissions to a receiving unit. A transmitting station used to communicate with the receiving unit may have a first and second antenna (34, 36) and repeatedly switch between the two antennas (34, 36) during the transmission of information to the receiving unit. Transmission of information may be initiated from a first antenna (34), and when terminated, transmission of information from a second antenna (36) is initiated. Likewise, after transmission of information from the second antenna (36) is terminated, transmission of information from the first antenna (34) continues. This 'swapping' of antennas continues until the information transfer ends. Antenna swapping results in diversity transmissions that improve the ability of the receiving unit to receive a coded and interleaved information transmitted from the transmitting station. The interleaver may disperse the encoded symbols in each antenna dwell period such that decoder decisions are based on a mix of symbols from each antenna.

公开(公告)号：EP0797873A2

公开(公告)日：1997-10-01

申请号：EP95943046.0

申请日：1995-12-11

申请人： QUALCOMM INCORPORATED

发明人： WHEATLEY, Charles, E., III ,  PETERZELL, Paul, E. ,  KORNFELD, Richard, K. ,  WEILAND, Ana, L.

IPC分类号： H04B ,  H04B1 ,  H03G1 ,  H03G3 ,  H04B3 ,  H04B7 ,  H04B15

CPC分类号： H04W52/52 ,  H03F3/72 ,  H03F2203/7239 ,  H03G1/0088 ,  H03G3/3052 ,  H03G3/3068 ,  H04B1/109 ,  H04B1/70755 ,  H04B1/7097

摘要： The method and apparatus of the present invention improve the immunity to interference of a radio receiver. The power level of a received signal is detected. If the power level meets or exceeds a predetermined power threshold, the low noise amplifier (703) is by-passed (730), thus increasing the intercept point of the receiver components. Alternative embodiments include the use of an RF power detector (105) to control the front-end gain (110) as a function of jammer power. In lieu of a switchable RF gain block (730), several methods of continuous gain control are proposed. Continuous gain control allows the interference suppression and sensitivity of the receiver to be adjusted at lower signal levels than the switchable gain block. A method of the present invention adjusts the input gain by a predetermined amount (1601). The receiver processing measures the gain change in the IF signal power (1605). If the change is less than the predetermined amount (1610), the CDMA signal and jammers are below the noise floor and, therefore, the gain is increased (1615). If the IF signal power change is greater than the predetermined amount, the interference is evident and the gain is reduced to reduce the intermodulation products (1620). This process is used until the receiver is operating at the best compromise between interference and noise figure.

摘要翻译： 增加一个无线电接收机的免疫力对无线电频率干扰的装置，所述无线电接收器处接收的信号，所述装置包括：耦合到所述接收到的信号，具有打开位置和闭合位置的开关（1105）的开关（1105）; 一个电阻（1101）时，电阻的第一端部（1101）被耦合到所述开关（1105）和所述电阻（1101）的第二端部的闭合位置被耦合到地电势; 在放大器（1101），其具有耦合到所述开关（1105），用于在输出处放大的接收信号生成的打开位置的输入; 耦合到所述开关（1105）的控制器，用于切换开关（1105）到所述闭合位置，响应于所接收到的信号超过预定的功率电平，所述接收到的信号传导通过所述开关（1105）和所述电阻（1101）到 当接地电位，所述开关（1105）是在所述关闭位置; 和所述电阻（1101）在输入端产生阻抗失配的给放大器。所述（1110），当所述开关（1105）处于关闭位置，从而减少了发表的所述放大器（1110）的增益。

公开(公告)号：EP0783804A1

公开(公告)日：1997-07-16

申请号：EP95935160.0

申请日：1995-09-27

申请人： QUALCOMM INCORPORATED

发明人： KORNFELD, Richard, K. ,  WHEATLEY, Charles, E., III

IPC分类号： H04B1 ,  H04B7 ,  H04J1 ,  H04J13 ,  H04L1 ,  H04L5 ,  H04Q11 ,  H04W36

CPC分类号： H04B7/12 ,  H04B1/005 ,  H04W36/14 ,  H04W36/18

摘要： The dual band code division multiple access radio of the present invention operates on multiple frequencies simultaneously on either transmit or receive. The transmit path operates by splitting the transmit intermediate frequency (IF) path (103) and mixing the IF to two different transmit frequencies using two frequency synthesizers (140 and 145). The receive path (104) has two RF channels (116 and 117) that are mixed with the frequencies generated by the synthesizers (140 and 145) and summed into one IF strip. Thus the radio of the present invention can perform a soft hand-off between frequencies while communicating with both base stations simultaneously. Additional mixing paths and synthesizers can be added if it is desired to communicate with more than two base stations simultaneously.

公开(公告)号：EP1016225B1

公开(公告)日：2010-02-03

申请号：EP98948320.1

申请日：1998-09-18

申请人： QUALCOMM INCORPORATED

发明人： WHEATLEY, Charles, E., III ,  TIEDEMANN, Edward, G., Jr.

IPC分类号： H04B7/00

CPC分类号： H04J3/0682 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/7077 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04W56/0015 ,  H04W56/0045 ,  H04W92/20

公开(公告)号：EP1281249B1

公开(公告)日：2009-01-21

申请号：EP01935213.7

申请日：2001-05-08

申请人： QUALCOMM INCORPORATED

发明人： WHEATLEY, Charles, E., III ,  BENDER, Paul, E.

IPC分类号： H04B7/26

CPC分类号： H04J13/00 ,  H04B7/2618 ,  H04J13/0048

摘要： A novel method and apparatus for providing both voice services and data services in a High Data Rate (HDR) wireless communication system. At least one sub-channel is formed on the forward link of the HDR system. The at least one sub-channel comprise at least one time slot that occupies a specified position in a frame of the forward link. The at least one sub-channel is assigned for voice services. The voice services at the at least one sub-channel are provided in accordance with a CDMA principles. Such principles are disclosed e.g., in IS-95, cdma2000, or other standards known to one skilled in the art. The remaining time slots are used for data services. In another aspect of the invention, additional sub-channels are formed, utilizing all remaining time slots. The additional sub-channels are assigned to data services, such that each sub-channel carries data to a different user. The number of sub-channels assigned to voice services, and the number of sub-channels assigned to voice services changes with varying needs for voice services and data services.