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公开(公告)号：DE69535225D1
公开(公告)日：2006-10-26
申请号：DE69535225
申请日：1995-12-11
Applicant: QUALCOMM INC
Inventor： WHEATLEY , PETERZELL PAUL E , KORNFELD RICHARD K , WEILAND ANA L
IPC: H04B1/06 , H04B7/005 , H03G1/00 , H03G3/20 , 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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公开(公告)号：AT339811T
公开(公告)日：2006-10-15
申请号：AT04019499
申请日：1995-12-11
Applicant: QUALCOMM INC
Inventor： WHEATLEY CHARLES E , 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 , H04B1/707 , H03G3/20
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：CA2200960C
公开(公告)日：2005-11-29
申请号：CA2200960
申请日：1995-09-27
Applicant: QUALCOMM INC
Inventor： WHEATLEY CHARLES E III , KORNFELD RICHARD K
Abstract: 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 communicatin g with both base stations simultaneously. Additional mixing paths and synthesizers can be added if it is desired to communicate with mor e than two base stations simultaneously.
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公开(公告)号：FI116342B
公开(公告)日：2005-10-31
申请号：FI972501
申请日：1997-06-12
Applicant: QUALCOMM INC
Inventor： WHEATLEY III CHARLES E , 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
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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105.发明专利
公开(公告)号：ES2225851T3
公开(公告)日：2005-03-16
申请号：ES95943046
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: EL METODO Y EL APARATO DE LA INVENCION MEJORA LA INMUNIDAD A LAS INTERFERENCIAS DE UN RECEPTOR DE RADIO. SE DETECTA EL NIVEL DE POTENCIA DE UNA SEÑAL RECIBIDA. SI EL NIVEL DE POTENCIA IGUALA O EXCEDE UN LIMITE DE POTENCIA PREDETERMINADO, EL AMPLIFICADOR DE RUIDO BAJO (703) ES DERIVADO (730), INCREMENTADO DE ESTA FORMA EL PUNTO DE INTERSECCION DE LOS COMPONENTES DEL RECEPTOR. REALIZACIONES ALTERNATIVAS INCLUYEN EL USO DE UN DETECTOR DE POTENCIA DE RF (105) PARA CONTROLAR LA GANANCIA DE LA SECCION DE ENTRADA (110) COMO FUNCION DE LA POTENCIA DE PERTURBACION. EN LUGAR DE UN BLOQUE DE GANANCIA DE RF CONMUTABLE (730), SE PROPONEN VARIOS METODOS DE CONTROL CONTINUO DE LA GANANCIA. EL CONTROL CONTINUO DE LA GANANCIA PERMITE SUPRIMIR LAS INTERFERENCIAS Y AJUSTAR LA SENSIBILIDAD DEL RECEPTOR A MENORES NIVELES DE SEÑAL QUE EL BLOQUE DE GANANCIA CONMUTABLE. UN METODO DE LA INVENCION AJUSTA LA GANANCIA DE ENTRADA EN UNA CANTIDAD PREDETERMINADA (1601). EL PROCESAMIENTO DEL RECEPTOR MIDE EL CAMBIO DE GANANCIA EN LA POTENCIA DE LA SEÑAL DE IF (1605). SI EL CAMBIO ES MENOR QUE LA CANTIDAD PREDETERMINADA (1610), LA SEÑAL DE CDMA Y LAS EMISIONES PERTURBADORAS ESTAN POR DEBAJO DEL SUELO DE RUIDO Y, POR LO TANTO, LA GANANCIA SE INCREMENTA (1605). SI EL CAMBIO DE POTENCIA DE LA SEÑAL DE IF ES MAYOR QUE LA CANTIDAD PREDETERMINADA, LA INTERFERENCIA ES EVIDENTE Y LA GANANCIA SE REDUCE PARA REDUCIR LOS PRODUCTOS DE INTERMODULACION (1620). ESTE PROCESO SE UTILIZA HASTA QUE EL RECEPTOR ESTE OPERATIVO CON LA MEJOR RELACION ENTRE EL VALOR DE INTERFERENCIA Y DE RUIDO.
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Patent Agency Ranking
公开(公告)号：ES2202377T3
公开(公告)日：2004-04-01
申请号：ES95935160
申请日：1995-09-27
Applicant: QUALCOMM INC
Inventor： KORNFELD RICHARD K , WHEATLEY CHARLES E III
IPC: H04B1/38 , H04B1/40 , H04B7/005 , H04B7/12 , H04B7/208 , H04B7/26 , H04J1/04 , H04L1/04 , H04L5/06 , H04Q11/02 , H04W36/14 , H04W36/18
Abstract: 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.\!
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公开(公告)号：AT242564T
公开(公告)日：2003-06-15
申请号：AT96907159
申请日：1996-03-01
Applicant: QUALCOMM INC
Inventor： MARTIN CHRISTOPHER B , KORNFELD RICHARD K , GREGORY SHERMAN
Abstract: A transceiver system for interfacing digital modems with radio frequency signals including an antenna, an antenna interface system and a modem interface system separated by a cable. The antenna is placed in a location having optimal reception and in close proximity to the antenna interface system. The cable couples the antenna interface system to the modem interface system. The modem interface system includes a two state variable attenuator and an attenuation register that are configured to either reduce the strength of the receive (Rx) signal when the modems are located near a base station, or to transmit the Rx signal without attenuation when the concentrated subscriber unit is at a more distant location. The outgoing, or transmit (Tx), signal is also attenuated in a similar manner to the incoming signal. A signal loss detection system includes a detector located in the modem interface system that receives an oscillating signal transmitted from the antenna interface system through the coaxial cable. A differentiating integrator then determines the amount of signal loss experienced by this oscillating signal during transmission through the coaxial cable and attenuates the signal from the antenna interface system accordingly so the amount of loss experienced remains constant. DC power is transmitted from the modem interface system to the antenna interface system through the coaxial cable. A maximum power limiting system detects when the signal being generated exceeds the capacity of the transmit power amplifier and transmits an alarm signal to the modem interface system.
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公开(公告)号：CA2275156C
公开(公告)日：2002-11-12
申请号：CA2275156
申请日：1995-02-17
Applicant: QUALCOMM INC
Inventor： MALONEY JOHN E , KERR RICHARD J , KORNFELD RICHARD K , WEILAND ANA L , WILSON NATHANIEL B
Abstract: The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together, generate a gain contro l signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.
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公开(公告)号：AU717794B2
公开(公告)日：2000-03-30
申请号：AU1424999
申请日：1999-01-29
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: 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：AU717774B2
公开(公告)日：2000-03-30
申请号：AU1425099
申请日：1999-01-29
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: 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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