公开(公告)号：BR0003576A

公开(公告)日：2001-04-03

申请号：BR0003576

申请日：2000-08-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H04W36/06 ,  H04W72/02 ,  H04Q7/32 ,  H04Q7/30

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：AU5197100A

公开(公告)日：2001-02-22

申请号：AU5197100

申请日：2000-08-11

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03G1/04 ,  H03F1/32 ,  H03F3/20 ,  H03F3/21 ,  H04B1/62 ,  H03K5/01

Abstract: Method and apparatus for substantially eliminating distortion produced by a processing circuit where the distortion produced by a first circuit with similar characteristics as the processing circuit is modified and the modified distortion is applied to the processing circuit. The distortion produced by the first circuit is modified based on information derived from distortion produced by the processing circuit. The modified distortion, when applied to the processing circuit, combines destructively with distortion produced by the processing circuit.

公开(公告)号：CA2315962A1

公开(公告)日：2001-02-20

申请号：CA2315962

申请日：2000-08-08

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：CA2315577A1

公开(公告)日：2001-02-19

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 signal(s) (far from the null), the adaptive gain/or phase contro l 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：CA2222945C

公开(公告)日：2001-01-23

申请号：CA2222945

申请日：1997-11-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN ,  BI QI

IPC: H04B7/01 ,  H04B7/15 ,  H04B7/155 ,  H04B7/26 ,  H04Q7/36

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 whose amplitude and phase are adjusted in response to the amplitude and phase of a sampled input signal when a switch turns off the normal output of the repeater for a short period of time. In one embodiment, a pilot signal 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：BR9907406A

公开(公告)日：2000-09-12

申请号：BR9907406

申请日：1999-11-11

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32

Abstract: A nested feed forward distortion reduction system, which reduces the distortion from a main amplifier (62) on a main signal path, uses a nested feed forward arrangement (82) for the correction amplifier (86) to reduce the distortion produced from the correction amplifier. In reducing the distortion from the correction amplifier(s) and using progressively higher quality correction amplifier(s), the nested feed forward arrangement produces an improved, more stable representation of the distortion from the main amplifier, thereby alleviating the need for variable gain and/or phase control in producing amplified signal with reduced distortion.

公开(公告)号：BR9904248A

公开(公告)日：2000-09-12

申请号：BR9904248

申请日：1999-09-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03D13/00

Abstract: The present invention is a method and an apparatus for measuring phase differences between signals A and B using an absolute voltage value for each phase difference between +/-180 DEG . 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 DEG for signals A and B.

公开(公告)号：CA2284333A1

公开(公告)日：2000-05-18

申请号：CA2284333

申请日：1999-09-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN

IPC: H03F1/32

Abstract: A nested feed forward distortion reduction system, which reduces the distortion from a main amplifier on a main signal path, uses a nested feed forward arrangement for the correction amplifier to reduce the distortion produced from the correction amplifier. In reducing the distortion from the correction amplifier(s) and using progressively higher quality correction amplifier(s), the nested feed forward arrangement produces an improved, more stable representation of the distortion from the main amplifier, thereby alleviating the need for variable gain and/or phase control in producing amplified signal with reduced distortion.

公开(公告)号：AU4888499A

公开(公告)日：2000-03-30

申请号：AU4888499

申请日：1999-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MYER ROBERT EVAN ,  PATEL MOHAN

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

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 generated and is cause to traverse across the frequency band of operation of the electrical circuit. Information obtained from the traversing pilot modulated carrier signal when it is determined that there is no interference between any signal applied to or generated by the electrical circuit. The information is used by the control system to substantially cancel the distortion.

公开(公告)号：CA2279031A1

公开(公告)日：2000-03-29

申请号：CA2279031

申请日：1999-07-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PATEL MOHAN ,  MYER ROBERT EVAN

IPC: H03L7/00 ,  H03F1/32 ,  H04B1/12 ,  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 generated and is cause to traverse across the frequency band of operation of the electrical circuit. Information obtained from the traversing pilot modulated carrier signal when it is determined that there is no interference between any signal applied to or generated by the electrical circuit. The information is used by the control system to substantially cancel the distortion.