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    MULTIPLE BAND RADIO
    2.
    发明授权
    MULTIPLE BAND RADIO 失效
    Mehrbnd-Funkgrt

    公开(公告)号：EP0783804B1

    公开(公告)日：2003-05-07

    申请号：EP95935160.2

    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： H04B7/12

    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.

    DUAL-BAND ANTENNA SYSTEM
    3.
    发明公开
    DUAL-BAND ANTENNA SYSTEM 失效
    双波段天线系统

    公开(公告)号：EP0791232A1

    公开(公告)日：1997-08-27

    申请号：EP96930835.0

    申请日：1996-09-11

    申请人： QUALCOMM INCORPORATED

    发明人： PITTA, Thomas, A. ,  PETERZELL, Paul, E. ,  KORNFELD, Richard, K. ,  WEILAND, Ana, L. ,  WALLACE, Raymond, C.

    IPC分类号： H01P1 ,  H03H7 ,  H04B1

    CPC分类号： H04B1/406 ,  H01P1/213 ,  H03H2007/386 ,  H04B1/005 ,  H04B1/18

    摘要： A dual-band antenna system for use in a portable communications device is disclosed herein. The antenna system includes an antenna element (10) for radiating electromagnetic energy within low-band and high-band wavelength ranges. In a preferred embodiment, a low-band isolator network (20), coupled to the antenna element (10), provides signal isolation between high-band and low-band signal paths during high-band operation. Similarly, a high-band isolator network (18) provides signal isolation, during operation over the low-band range of wavelengths, between the high-band and low-band signal paths. During transmit and receive operation, low-band and high-band electromagnetic energy directed through the antenna (10) is passed by the low-band and high-band isolator networks, (20) and (18) respectively. Also included are low-band and high-band matching networks (28) and (36), respectively, which couple the low-band and high-band isolator networks (20) and (18), respectively, to low-band and high-band transceiver circuitry.

    METHOD AND APPARATUS FOR PROVIDING ANTENNA DIVERSITY IN A PORTABLE RADIOTELEPHONE
    4.
    发明公开
    METHOD AND APPARATUS FOR PROVIDING ANTENNA DIVERSITY IN A PORTABLE RADIOTELEPHONE 失效
    方法和一种用于提供天线分集便携式无线电电话

    公开(公告)号：EP0870370A1

    公开(公告)日：1998-10-14

    申请号：EP96945286.0

    申请日：1996-12-23

    申请人： QUALCOMM INCORPORATED

    发明人： KORNFELD, Richard, K.

    IPC分类号： H04J13 ,  H04B7

    CPC分类号： H04B7/0894 ,  H04B7/0671

    摘要： A diversity antenna system in a mobile unit which provides time, space and antenna pattern diversity to mitigate the effects of fading at a CDMA mobile unit. The system is comprised of a diversity antenna (105) and a main antenna (100). The main antenna (100) and diversity antenna (105) are physically separated and oriented such that they have different antenna gain patterns. In a first embodiment, the diversity antenna (105) functions as a receive antenna only, while the main antenna (100) performs both transmit and receive functions. In a second embodiment, both the main antenna (100) and the diversity antenna (105) transmit and receive signals. A delay circuit (130) couples the diversity antenna (105) to a summer (135) which sums the signals received by the main antenna (100) and the diversity antenna (105), respectively.

    TEMPERATURE COMPENSATED AUTOMATIC GAIN CONTROL
    5.
    发明公开
    TEMPERATURE COMPENSATED AUTOMATIC GAIN CONTROL 失效
    温度补偿自动增益控制

    公开(公告)号：EP0824784A1

    公开(公告)日：1998-02-25

    申请号：EP96913015.0

    申请日：1996-04-22

    申请人： QUALCOMM INCORPORATED

    发明人： KORNFELD, Richard, K.

    IPC分类号： H03G3 ,  H04B1

    CPC分类号： H03G3/3042 ,  H04B1/036 ,  H04B1/04

    摘要： The process and apparatus of the present invention limits the output power of a radio in response to the temperature of key components of the radio. Temperature sensors (1025) measure the temperature of the components and send the temperature signals to power control circuitry (1030). The transmit power is measured (1020) at the output of the power amplifier (1015). As the temperature increases, the power control circuitry (1030) reduces the transmit power to reduce the temperature of the key components. The power is monitored so that it is not reduced below the power level required by standards.

    METHOD AND APPARATUS FOR INCREASING RECEIVER IMMUNITY TO INTERFERENCE
    8.
    发明公开
    METHOD AND APPARATUS FOR INCREASING RECEIVER IMMUNITY TO INTERFERENCE 失效
    方法和设备用于增加接收机抗扰度受到干扰

    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。

    MULTIPLE BAND RADIO
    9.
    发明公开
    MULTIPLE BAND RADIO 失效
    更多频段双向无线电

    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.