公开(公告)号：CA2279444A1

公开(公告)日：2000-03-29

申请号：CA2279444

申请日：1999-07-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32 ,  G05B11/30 ,  G05B23/00 ,  H03F3/66 ,  H03G1/04 ,  H03L7/00 ,  H04B1/12 ,  H04B3/10 ,  H04B15/00 ,  H04L27/36

Abstract: A control system comprising an electrical circuit that produces distortion where the electrical circuit has a frequency band of operation. Double side band pilot signals are located slightly outside the boundaries of the frequency band of operation so as not to interfere with any signals within the frequency band of operation, but still provide information that the control system uses to substantially cancel the distortion.

公开(公告)号：CA2279095A1

公开(公告)日：2000-03-29

申请号：CA2279095

申请日：1999-07-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03L7/00 ,  H03F1/32 ,  H04B1/12 ,  H04B1/76 ,  H04B3/10 ,  G05B23/00

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.

公开(公告)号：DE69940416D1

公开(公告)日：2009-04-02

申请号：DE69940416

申请日：1999-08-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32 ,  H03G9/00

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.

公开(公告)号：CA2315577C

公开(公告)日：2005-03-01

申请号：CA2315577

申请日：2000-08-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GHANADAN REZA ,  MYER ROBERT EVAN

IPC: H04L27/36 ,  H03F1/32 ,  H04B1/04 ,  H04B3/06 ,  H04B7/01 ,  H03G9/00 ,  H03F1/26

Abstract: An adaptive gain and/or phase control system adapts the gain and/or pha se adjustment resolution to provide improved performance. For example, the adaptive gain and/or phase control system can dynamically adjust the adjustment resolution for gain and/or phase adjustments as a function of the error signal(s). In response to a large error signals) (far from the null), the adaptive gain/or phase control system decreases the adjustment resolution, resulting in a faster convergence rate. In a feed forward distortion reduction system, decreasing the adjustment resolution improves the transient response of the amplifier (for example, given any set of operating conditions, how quickly the amplifier responds to a changing input). As phas e or gain adjustments are made to approach the null, the error signal reduces, an d the adaptive distortion reduction system increases the adjustment resolution. By increasing the adjustment resolution as the error signal approaches the null , finer phase or gain adjustments can be made which further reduce the error signal. For example, in a feed forward distortion reduction system, such a scheme preven ts the error signal from repeatedly jumping over the null due to limited resolution without sacrificing the transient response of the amplifier.

公开(公告)号：CA2289187C

公开(公告)日：2004-05-25

申请号：CA2289187

申请日：1999-11-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32 ,  H04B1/76 ,  H04B15/00

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 th e 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 b y changing the relative phase and/or gain between the signals on the main signal path a nd 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 t he distortion.

公开(公告)号：AU760868B2

公开(公告)日：2003-05-22

申请号：AU6447499

申请日：1999-12-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32 ,  H03F3/14

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.

公开(公告)号：AU750671B2

公开(公告)日：2002-07-25

申请号：AU4888099

申请日：1999-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03L7/00 ,  H03F1/32 ,  H04B1/12 ,  H04B1/76 ,  H04B3/10 ,  H03L7/24 ,  H03C1/00

Abstract: A control system comprises an electrical circuit (108) that produces distortion where the electrical circuit has a frequency band of operation. A pilot modulated carrier signal (produced by 182, 184) 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.

公开(公告)号：DE69901421D1

公开(公告)日：2002-06-13

申请号：DE69901421

申请日：1999-12-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32

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.

公开(公告)号：AU5339800A

公开(公告)日：2001-02-22

申请号：AU5339800

申请日：2000-08-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H04W36/06 ,  H04W72/02 ,  H04Q7/38

Abstract: A wireless communications technique enables direct call set up and communication between wireless subscribers without involving network infrastructure. A mobile is modified to perform like a network base station during a local calling mode initiated by a user, thereby reversing transmit and receive frequency bands and allowing the mobile to set up and carry out a call as if it were a network base station. The mobile initially performs a communication channel or frequency sweep sequence to determine an idle traffic channel, thereby preventing interference with other subscribers. After a local call is established, the transceiver monitors call quality, and performs another communication channel or frequency sweep sequence to select a new traffic channel when call quality drops below a threshold level to ensure a certain level of call quality between the first and second mobiles.

公开(公告)号：CA2315583A1

公开(公告)日：2001-02-19

申请号：CA2315583

申请日：2000-08-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GHANADAN REZA ,  MYER ROBERT EVAN

IPC: H03G1/04 ,  H03F1/32 ,  H03G9/00 ,  H03F1/26

Abstract: A gain and phase control system performs a gain (or phase) adjustment bas ed on the results of a previous gain (or phase) adjustment after an intervening phase (or gain) adjustment. A gain adjustment is based on the results of a previous ga in adjustment rather than on the results of an intervening phase adjustment. A phase adjustment is based on the results of a previous phase adjustment rather tha n the results of an intervening gain adjustment. As such, the above-mentioned increase in error signal does not occur because a gain adjustment is based on the result s of the previous gain adjustment, and a phase adjustment is based on the results of the previous phase adjustments. In accordance with another aspect of the present invention, the gain and phase control system makes a gain (or phase) adjustment in parallel with detecting the results from a previous phase (or gain) adjustment, thereby taking advantage of the delay between adjustment and detection of the resulting error signal to improve the convergence rate. For example, the gain and phase control system can perform single alternating gain and phase adjustments and make a gain (or phase) adjustment while detecting the error signal resulting from a precedin g phase (or gain) adjustment. When the error signal resulting from the gain (or phas e) adjustment is being detected, the gain and phase control system makes a phas e (or gain) adjustment using the results detected from the preceding phase (or gai n) adjustment.