-
公开(公告)号：CA2316511A1
公开(公告)日：2001-02-28
申请号：CA2316511
申请日：2000-08-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
Abstract: The high directivity coupler includes at least a first and second direction al coupler, each producing forward and reverse signals from a signal traveling along a transmission line. A combiner combines the forward signals in an additive manner while canceling the reverse signals with one another.
-
公开(公告)号：AU5196800A
公开(公告)日：2001-02-22
申请号：AU5196800
申请日：2000-08-11
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GHANADAN REZA , MYER ROBERT EVAN
Abstract: A gain and phase control system performs a gain (or phase) adjustment based 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 gain 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 than 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 results 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 preceding phase (or gain) adjustment. When the error signal resulting from the gain (or phase) adjustment is being detected, the gain and phase control system makes a phase (or gain) adjustment using the results detected from the preceding phase (or gain) adjustment.
-
公开(公告)号：DE69900042D1
公开(公告)日：2001-02-08
申请号：DE69900042
申请日：1999-06-08
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN , CHI-CHIEH WEN JACK , PATEL MOHAN
Abstract: A frequency mixing system (10) provides an expanded dynamic range when compared to the dynamic range(s) of an individual mixer(s) (12) that makes up the frequency mixing system. The frequency mixing system adjusts (by 14) the amplitude of an input signal (S) to be frequency mixed (in 12) to produce a frequency converted signal (S + D ) with an acceptable and/or lower (when compared to the amplitude of intermodulation distortion produced by mixing the input signal without amplitude adjustment) amplitude of intermodulation distortion. If the input signal were frequency mixed without the amplitude adjustment, an unacceptable and/or higher level of intermodulation distortion would result (when compared to the corresponding intermodulation distortion if the amplitude-adjusted signal were mixed by an individual mixer). Adjusting the amplitude of the input signal creates an adjusted signal (S+D) with signal distortion on a first path (20). The frequency mixing system uses a feed-forward arrangement to reduce the signal distortion created by adjusting the amplitude of the input signal, thereby producing the desired frequency converted signal with the lower and/or acceptable level of intermodulation distortion. For example, the signal distortion (D) from the first path can be placed on a second path (22), frequency converted using a second mixer (38) on the second path, and subsequently put back into the first path to combine (at 16) with the signal distortion on the first path to provide the desired frequency converted signal with the acceptable and/or lower level of intermodulation distortion. By increasing the relative difference between the amplitudes of the desired frequency converted signal and of the intermodulation distortion, the frequency mixing system provides an expanded dynamic range.
-
公开(公告)号：BR9904247A
公开(公告)日：2001-01-16
申请号：BR9904247
申请日：1999-09-20
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 comprises an electrical circuit (108) that produces distortion where the electrical circuit has a frequency band of operation. Double side band pilot signals (produced by 154, 156) 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：CA2238622C
公开(公告)日：2000-10-31
申请号：CA2238622
申请日：1998-05-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
IPC: H03F1/32
Abstract: An automatic control system for reducing distortion produced by electrical circu it where a pilot signal pulse is applied to the electrical circuit for a period of time during which the system determines the adjustments to be made to its circuitry to reduc e the distortion.
-
Patent Agency Ranking
公开(公告)号：BR9904250A
公开(公告)日：2000-08-29
申请号：BR9904250
申请日：1999-09-20
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
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：BR9903933A
公开(公告)日：2000-08-22
申请号：BR9903933
申请日：1999-08-24
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.
-
公开(公告)号：DE69701317T2
公开(公告)日：2000-07-27
申请号：DE69701317
申请日：1997-12-11
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BI QI , MYER ROBERT EVAN
Abstract: The invention is a repeater for a telecommunications transmission system such as a CDMA wireless system. The repeater reduces leakage by means of a feedback signal (on 30,31,32,33) whose amplitude and phase are adjusted (in 31) in response to the amplitude and phase of a sampled input signal (from 35) when a switch (24) turns off the normal output of the repeater for a short period of time. In one embodiment, a pilot signal (from 40) is transmitted during this time period so that the sampled input is the leakage signal. In another embodiment, the sampled input is the normal transmission signal received during the time period.
-
公开(公告)号：CA2289187A1
公开(公告)日：2000-06-21
申请号：CA2289187
申请日：1999-11-09
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.
-
60.发明专利
公开(公告)号：AU4888099A
公开(公告)日：2000-03-30
申请号：AU4888099
申请日：1999-09-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MYER ROBERT EVAN
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.
-
-
-
-
-
-
-
-
-
Search Results
119
records
(took 0.027 seconds)
