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公开(公告)号：WO02056490A9
公开(公告)日：2004-04-08
申请号：PCT/US0200891
申请日：2002-01-10
Applicant: QUALCOMM INC
Inventor： PETERZELL PAUL E , SAHOTA KAMAL
Abstract: A system and method for a multi-band direct conversion wireless communication receiver is presented. The system incorporates a low noise amplifier (LNA) configured to amplify received RF signals, a local oscillator (LO) configured to output a frequency, and I and Q channel mixers. Each mixer has a first input operatively coupled to the LNA, a second input operatively coupled to the LO output, and an output. The system further includes an adjustment mechanism configured to adjust drive level of the LO depending on a level of jammers detected by the receiver. Thus, the receiver may operate in multiple wireless communication bands and modes and meet the associated specifications.
Abstract translation: 提出了一种用于多频带直接转换无线通信接收机的系统和方法。 该系统包括配置成放大接收的RF信号的低噪声放大器（LNA），配置为输出频率的本地振荡器（LO）以及I和Q通道混频器。 每个混合器具有可操作地耦合到LNA的第一输入，可操作地耦合到LO输出的第二输入和输出。 该系统还包括调整机构，其被配置为根据接收器检测到的干扰程度来调整LO的驱动电平。 因此，接收机可以在多个无线通信频带和模式中操作并满足相关规范。
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公开(公告)号：AU2007234638B2
公开(公告)日：2010-07-08
申请号：AU2007234638
申请日：2007-11-23
Applicant: QUALCOMM INC
Inventor： PETERZELL PAUL E , SIH GILBERT C , CHALLA RAGHU , HOLENSTEIN CHRISTIAN , KANG INJUP , LI TAO , WALKER BRETT C , RAGHUPATHY ARUN , SEVERSON MATTHEW L
Abstract: An apparatus and method in a wireless communication system, the apparatus comprising: first means for amplifying a received signal; means for cancelling a DC offset in the amplified signal; second means for digitally amplifying the DC offset cancelled signal; and means for measuring the digitally amplified signal and to control the gains of the first and second amplifying means.
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公开(公告)号：DE69938345T2
公开(公告)日：2009-04-02
申请号：DE69938345
申请日：1999-06-14
Applicant: QUALCOMM INC
Inventor： PETERZELL PAUL E , ROSS DAVID J , CHOW MARLAND
Abstract: A portable phone has an outer casing with opposite upper and lower walls, one of the walls having an opening for access to the interior of the casing, and a lid removably mounted in the opening for normally closing the opening. A main circuit board is mounted in the outer casing, with a plurality of phone components mounted on the circuit board. A predetermined region of the board aligned with the opening is left exposed or empty of components, and forms a recess for receiving a battery. The battery receiving recess has contact pads, and a battery is removably engaged in the recess with battery contacts engaging the contact pads in the recess, whereby the battery can be removed and replaced via the opening after opening the lid.
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公开(公告)号：AU2002244049B8
公开(公告)日：2009-01-22
申请号：AU2002244049
申请日：2002-02-15
Applicant: QUALCOMM INC
Inventor： RAGHUPATHY ARUN , WALKER BRETT C , HOLENSTEIN CHRISTIAN , LI TAO , CHALLA RAGHU , KANG INJUP , PETERZELL PAUL E , SEVERSON MATTHEW L , SIH GILBERT C
Abstract: An apparatus and method in a wireless communication system, the apparatus comprising: first means for amplifying a received signal; means for cancelling a DC offset in the amplified signal; second means for digitally amplifying the DC offset cancelled signal; and means for measuring the digitally amplified signal and to control the gains of the first and second amplifying means.
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公开(公告)号：AT403284T
公开(公告)日：2008-08-15
申请号：AT04019498
申请日：1995-12-11
Applicant: QUALCOMM INC
Inventor： WHEATLEY CHARLES E III , PETERZELL PAUL E , KORNFELD RICHARD K , WEILAND ANA L
IPC: H04B1/06 , H04B7/005 , H03G1/00 , H03G3/30 , H04B20060101 , H04B1/10 , H04B1/16 , H04B1/18 , H04B1/40 , H04B1/7075 , H04B1/7097 , H04B3/06 , H04B7/26 , H04B15/00
Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).
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Patent Agency Ranking
公开(公告)号：FI20050748A
公开(公告)日：2005-07-13
申请号：FI20050748
申请日：2005-07-13
Applicant: QUALCOMM INC
Inventor： WHEATLEY CHARLES E III , KORNFELD RICHARD K , PETERZELL PAUL E , WEILAND ANA L
IPC: H04B1/06 , H03G1/00 , H03G3/30 , H04B20060101 , H04B1/10 , H04B1/16 , H04B1/18 , H04B1/40 , H04B1/7075 , H04B1/7097 , H04B3/06 , H04B7/005 , H04B7/26 , H04B15/00 , H04B
Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).
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公开(公告)号：CA2467295C
公开(公告)日：2005-06-21
申请号：CA2467295
申请日：1995-12-11
Applicant: QUALCOMM INC
Inventor： WHEATLEY CHARLES E III , PETERZELL PAUL E , KORNFELD RICHARD K , WEILAND ANA L
IPC: H04B1/06 , H03G1/00 , H03G3/30 , H04B20060101 , H04B1/10 , H04B1/16 , H04B1/18 , H04B1/40 , H04B1/7075 , H04B1/7097 , H04B3/06 , H04B7/005 , H04B7/26 , H04B15/00
Abstract: 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 is by-passed, thus increasing the intercept point of the receiver components.
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公开(公告)号：HK1063390A1
公开(公告)日：2004-12-24
申请号：HK04106137
申请日：2004-08-17
Applicant: QUALCOMM INC
Inventor： PETERZELL PAUL E , MALDONADO DAVID , GARD KEVIN , SEE PUAY HOE ANDREW , DUNWORTH JEREMY D , SAHOTA KAMAL
IPC: H03L7/183 , H04B20060101 , G01N33/14 , H03D20060101 , H03D3/00 , H04B1/30 , H04B1/40
Abstract: A system and method for generating a local oscillator (LO) frequency in a zero intermediate frequency (IF) receiver or transmitter is presented. A signal is received from a voltage controlled oscillator (VCO). The signal has a VCO frequency. The VCO frequency is divided by a number N to produce a signal having a divided-down frequency. The signal having the VCO frequency is then mixed with the signal having the divided-down frequency to produce an output signal having an output frequency. Local oscillator leakage is reduced. Thus, the receiver or transmitter may operate in multiple wireless communication bands and modes and meet the associated specifications.
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公开(公告)号：CA2207745C
公开(公告)日：2004-10-26
申请号：CA2207745
申请日：1995-12-11
Applicant: QUALCOMM INC
Inventor： PETERZELL PAUL E , KORNFELD RICHARD K , WEILAND ANA L , WHEATLEY CHARLES E III
IPC: H04B1/06 , H03G1/00 , H03G3/30 , H04B20060101 , H04B1/10 , H04B1/16 , H04B1/18 , H04B1/40 , H04B1/7075 , H04B1/7097 , H04B3/06 , H04B7/005 , H04B7/26 , H04B15/00 , H04Q7/32
Abstract: 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.
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公开(公告)号：CA2188446C
公开(公告)日：2004-07-06
申请号：CA2188446
申请日：1995-04-28
Applicant: QUALCOMM INC
Inventor： PETERZELL PAUL E , WILSON NATHANIEL B , BLACK PETER J
Abstract: An automatic gain control (AGC) apparatus for a digital receiver is disclose d herein. The AGC apparatus includes an adjustable gain amplifier (18) having an input port for receiving an input signal, a co ntrol port for receiving a gain control signal, and an o utput port for providing an output signal. The AGC apparatus further includes a measur ement circuit for generating a received power signal bas ed on the power of the output signal. A saturating integrator (22) compares th e received power signal to a reference signal and genera tes a gain control signal in response to a result of the comparison. The saturati ng integrator (22) includes a decision circuit (46) for enabling integration based on values of the received power signal, the reference sign al, and the gain control signal. In a preferred impleme ntation, the utilization of an input limiter in conjunction with an analog to digital converter enables accommodation of an increased input s ignal dynamic range.
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