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公开(公告)号：AU6447499A
公开(公告)日：2000-06-22
申请号：AU6447499
申请日：1999-12-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: A pilot signal detection system uses a band reject filter to reject the frequency band of at least one carrier signal to improve pilot signal detection. For example, in a feed forward distortion reduction system, the carrier signal(s) is on a main signal path along with a pilot signal which is injected into the main signal path at a frequency adjacent to the frequency band of the carrier signal(s). The carrier signal(s) and the pilot signal are amplified on the main signal path, resulting in distortion on the main signal path. To reduce the distortion from the main signal path, the feed forward distortion reduction system detects and reduces the pilot signal. To improve detection of the pilot signal, the pilot signal detection system provides a signal representative of the carrier signal(s) and the pilot signal with distortion from the main signal path onto a pilot detection path. A band reject filter on the pilot detection path rejects the frequency band of the carrier signal(s) while allowing the frequency of the pilot signal to pass through to pilot detect circuitry. Without the presence of the carrier signal(s), the pilot detect circuitry can more accurately detect the pilot signal on the pilot detection path. In response to the detected pilot signal, the pilot detect circuitry can provide control signal(s) to improve the reduction of the pilot signal by changing the relative phase and/or gain between the signals on the main signal path and the feed forward path. Thus, by improving the detection of the pilot signal, the pilot detection system improves the reduction of the pilot signal and thereby of the distortion.
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公开(公告)号：CA2278872A1
公开(公告)日：2000-02-29
申请号：CA2278872
申请日：1999-07-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: The present invention is a method and a feed forward circuit incorporating an automatic gain and phase controller for controlling amplitude gain and phase shift being applied to an input signal of an amplifier undergoing changing conditions. The automatic gain and phase controller is configured to monitor the amplifier output signals and manipulate the amplitude and phase of the amplifier input signal (via a gain and phase adjuster) such that the amplitude and phase of the amplifier output signals are substantially identical to those of previous amplifier output signals.
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公开(公告)号：BR9805261A
公开(公告)日：1999-12-21
申请号：BR9805261
申请日：1998-12-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: A multicarrier linear RF power amplifier incorporating an improved signal splitter and an improved signal combiner is disclosed. The amplifier comprises a plurality of wedge-shaped amplifier modules (318i). When such modules are radially disposed and abutted against one another, the inwardly facing edges of the modules collectively define a central or axially-located opening (326). An improved signal splitter (416), signal combiner (422), or dual splitter/combiner is advantageously disposed in the axially-located opening (326). The signal splitter or signal combiner is a conductor arrangement comprising a plurality of equal length conductors radially disposed on a dielectric substrate. The conductor arrangement is advantageously disposed within a suitably-configured housing (416,422). The housing is disposed within the axially-located opening.
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公开(公告)号：CA2254542A1
公开(公告)日：1999-06-18
申请号：CA2254542
申请日：1998-11-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
IPC: H03F3/60 , H01P5/12 , H03F11/00 , H04Q7/22 , H04Q7/24 , H04Q7/26 , H04Q7/30 , H03F3/19 , H03F3/68
Abstract: A multicarrier linear RF power amplifier incorporating an improved signal splitter and an improved signal combiner is disclosed. The amplifier comprises a plurality of wedge-shaped amplifier modules. When such modules are radially disp osed and abutted against one another, the inwardly facing edges of the modules collec tively define a central or axially-located opening. An improved signal splitter, signal combiner, or dual splitter/combiner is advantageously disposed in the axially-lo cated opening. The signal splitter or signal combiner is a conductor arrangement compr ising a plurality of equal length conductors radially disposed on a dielectric substra te. The conductor arrangement is advantageously disposed within a suitably-configured housing. The housing is disposed within the axially-located opening.
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公开(公告)号：DE69923632T2
公开(公告)日：2006-01-05
申请号：DE69923632
申请日：1999-07-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KANNELL GEORGE KENNETH , MYER ROBERT EVAN , SREENATH KRISHNAMURTHY
Abstract: A method for reducing the level of an undesired signal, generated through a frequency converter device, is implemented by a local oscillator (hereinafter "LO") leak cancellation circuit. A feedback correction loop, for a radio frequency (RF) transmitter or receiver, reduces an undesired local oscillator leak generated through a single input frequency converter device (20), such as a mixer, by a unique detection circuit (30). A unique nulling circuit (40) is also implemented for a multiple input frequency converter device, such as a quadrature modulator.
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Patent Agency Ranking46.发明专利
公开(公告)号：CA2279095C
公开(公告)日：2004-01-06
申请号：CA2279095
申请日：1999-07-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: A control system comprising an electrical circuit that produces distortion where the electrical circuit has a frequency band of operation. A pilot modulated carrier signal is frequency hopped about the frequency band of operation. The hopping pilot modulated carrier signal does not interfere with any signal applied to or generated by the electrical circuit as it is not at any time located within the frequency band of operation. Information obtained from the hopping pilot modulated carrier is provided to the control system which uses such information to cancel the distortion produced by the electrical circuit.
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公开(公告)号：CA2279443C
公开(公告)日：2001-12-25
申请号：CA2279443
申请日：1999-07-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: The present invention is a method and as apparatus for measuring phase differences between signals A and B using an absolute voltage value for each phase difference between ~180.degree.. This is accomplished using a third signal C, which is a signal having a phase approximately equal to the average phase between signals A and B. Signals C and A are subsequently amplitude limited and mixed to produce a fourth signal D, which is a signal having associated an absolute voltage value for each degree of phase difference between ~180.degree. for signals A and B.
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公开(公告)号：CA2254456C
公开(公告)日：2001-08-14
申请号：CA2254456
申请日：1998-11-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： PATEL MOHAN , ZIESSE NORMAN GERARD , MYER ROBERT EVAN , MONTGOMERY ROBERT KEITH , DONALDSON JIMMIE L
IPC: H03F3/60 , H03F1/32 , H03F1/42 , H04Q7/22 , H04Q7/24 , H04Q7/26 , H04Q7/30 , H03F3/189 , H04N5/067 , H03F3/20 , H04B1/62
Abstract: A modularly-partitioned feedforward multicarrier linear RF power amplifier i s described. The circuitry and components of the power amplifier are segregated into physically-separate modules in accordance with several criteria. In one embodiment, the power amplifier is segregated into a RF power module, a linearizer module and a DC power supply module. The RF power module includes power- and frequency- dependent components and general ly varies with the carrier frequency and output power requirements for a specific application. The linearizer module includes circuitry and components that are substantially power- and frequency- independent. As such, the linearizer module is substantially invariant and a single design may be used for virtually any application. The DC power supply module includes circuit and components that are substantially frequency independent but somewhat power dependent. T he DC power supply module may vary from amplifier to amplifier where there is a significant change in output power requirements.
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公开(公告)号：AU5357400A
公开(公告)日：2001-03-08
申请号：AU5357400
申请日：2000-08-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: A repeater (16) includes a single antenna (20), connected to a first terminal (24) of a three-terminal circulator (22), and an amplifier (32) connected between the second (26) and third (28) terminals of the circulator. The circulating direction of the circulator is from the first terminal to the second terminal, the second to the third terminal, and the third terminal to the first terminal. The circulator supplies signals received by the antenna (20) to the amplifier, and supplies the amplified received signals to the antenna (20) for transmission.
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公开(公告)号：CA2316512A1
公开(公告)日：2001-02-28
申请号：CA2316512
申请日：2000-08-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: The repeater includes a single antenna, connected to a first terminal of a three-terminal circulator, and an amplifier connected between the second and third terminal s of the circulator. The circulating direction of the circulator is from the firs t terminal to the second terminal, the second to the third terminal, and the third terminal to the first terminal. The circulator supplies signals received by the antenna to the amplifier, and supplies the amplified received signals to the antenna for transmission.
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