公开(公告)号：DE60108457D1

公开(公告)日：2005-02-24

申请号：DE60108457

申请日：2001-03-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： OCENASEK JOSEF ,  ZAPPALA CHRISTOPHER F

IPC: H03F1/32 ,  H04B1/04 ,  H04B1/10

公开(公告)号：CA2260286A1

公开(公告)日：1999-08-13

申请号：CA2260286

申请日：1999-01-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ZAPPALA CHRISTOPHER F ,  SIMMONS MICHAEL RALPH ,  PAGANO CARMINE JAMES II ,  RUCKI JOHN STANLEY ,  FAIRFIELD ROBERT CHARLES

IPC: H04B7/26 ,  H04W88/08 ,  H04B1/04 ,  H04Q7/00 ,  H04B7/24

Abstract: A wireless telecommunications system architecture is disclosed that is capable of supporting a centralized block radio architecture and of distributing the information-bearing signals from the block radio to geographically-dispersed radio heads using relatively low-cost cable (e.g., twisted-pair, etc.). In accordance with the illustrative embodiment of the present invention, a radio multiplexes, modulates, and channel codes one or more information-bearing signals and upconverts them, not to radio frequency, but to an intermediate frequency that can be transmitted over a low-cost cable. Co-located with each radio head is an upconverter that upconverts the intermediate frequency signal to radio frequency in preparation for radiation by an antenna.

公开(公告)号：CA2260281A1

公开(公告)日：1999-08-13

申请号：CA2260281

申请日：1999-01-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ZAPPALA CHRISTOPHER F ,  LOUGHRAN KEVIN

IPC: H04B7/08 ,  H04B7/26 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30 ,  H04B1/16 ,  H04B7/02

Abstract: A technique for achieving receive diversity without multiple antennas per cell is disclosed. An illustrative embodiment of the present invention comprises: a first antenna for receiving a first information-bearing signal at a first radio frequency; a first downconverter for downconverting the first information-bearing signal to a first intermediate frequency; a first transmitter for transmitting the first information-bearing signal at the first intermediate frequency over a first wireline; means for receiving the first information-bearing signal at the first intermediate frequency from the first wireline and for demodulating the first information-bearing signal.

公开(公告)号：CA2253487A1

公开(公告)日：1999-05-26

申请号：CA2253487

申请日：1998-11-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RUCKI JOHN STANLEY ,  ZAPPALA CHRISTOPHER F ,  WEN JACK CHI-CHIEH

IPC: H04B1/48 ,  H04B1/18 ,  H04B7/26 ,  H04B17/00 ,  H04B17/40 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30 ,  H04Q7/38 ,  H04Q7/36

Abstract: A wireless base station has a transmitter and receiver. Transmission signals are applied to an antenna through a transmit bandpass filter that is tuned for a transmit band of frequencies. Received signals from the antenna are applied to the receiver through a receive bandpass filter that is tuned for a receive band of frequencies An RF switching array consisting of four RF switch es interconnects the output of the transmitter and the input of the receiver such that normal, lo opback (self-test), and scanning modes can be performed. In the normal mode, the antenna is connected to the transmitter and receiver through the transmit and receive bandpass filters, respectively. Th e transmit and signal paths are effectively isolated from each other by three serially-connected open switches. In the loopback mode, the transmitter output is connected to the receiver input. In the scanning mode, the antenna is connected to the receiver through the transmit bandpass filter. The s ame set of interconnects provides for loopback and normal operation as well as the new scan ning operation. The use of switches rather than couplers or couplers for the loopback function reduc es noise and crosstalk between transmit and receive signal lines and lower losses in these lines.

公开(公告)号：CA2337601C

公开(公告)日：2004-05-25

申请号：CA2337601

申请日：2001-02-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KOLSRUD ARILD ,  ZAPPALA CHRISTOPHER F

IPC: H01P1/22 ,  H03M1/00 ,  H03M1/12 ,  H03M1/18

Abstract: The high-power selective signal attenuator includes an attenuator attenuating analog main signals, and a first analog-to- digital converter converting output of the attenuator to digital. A digital-to-analog converter reconverts the digital output of the first ADC to analog, and a cancellor receives the main signals and the analog output from the DAC. The cancellor cancels the analog output of the DAC from the main signals to substantially eliminate high- power signals. A second ADC receives the output of the cancellor and generates a digital output. Based on the digital output, control circuitry dynamically controls the attenuation of the attenuator to prevent saturation of the second ADC and to improve information throughput.

公开(公告)号：DE69902604D1

公开(公告)日：2002-10-02

申请号：DE69902604

申请日：1999-05-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PAGANO II ,  RUCKI JOHN STANLEY ,  WEN JACK CHI-CHIEH ,  ZAPPALA CHRISTOPHER F

IPC: H04B1/40 ,  H04B1/00 ,  H04B1/10 ,  H04B1/12 ,  H04B1/38 ,  H04B1/50 ,  H04B7/00 ,  H04B7/005 ,  H04B7/155 ,  H04B7/26 ,  H04Q7/30

Abstract: A communication system reduces the transmitter (13) overloading a transmit scanning receiver (17) by reducing transmitter signals transmitted from an overloading transmitter and received by the transmit scanning receiver. A sample of a transmitter signal to be transmitted is obtained (in 10a) from the transmitter before transmission. After the transmitter signal is transmitted and received by the transmit scanning receiver, the sample is used to reduce the transmitter signal at the transmit scanning receiver. To do so, the sample is delayed (24), adjusted (34) and combined (36) with the transmitter signal. In certain embodiments, a portion of a transmitter signal is obtained from a transmit path of a transmitter prior to transmission and put on a coupled path. The transmitter signal on the coupled path is adjusted and injected into a transmit scanning path of the transmit scanning receiver to combine with a transmitter signal which was transmitted by the transmitter and received at the transmit scanning receiver. A delay element in the coupled path is used to adjust the delay on the coupled path to correspond to the delay experienced by the transmitter signal which was transmitted by the transmitter and then received by the transmit scanning receiver. Amplitude and phase adjusters on the coupled path amplitude and phase adjust the transmitter signal on the coupled path to reduce the transmitter signal on the transmit scanning path. To improve the reduction of the transmitter signal on the transmit scanning path, measurements of at least the transmitter signal on the transmit scanning path can be made, and the measurements can be used to adjust the phase and/or amplitude of the transmitter signals on the coupled path to reduce the level of the transmitter signal on the transmit scanning path. Furthermore, successive cancellation stages (10n) comprising parallel coupled paths can be implemented to provide more suppression of the transmitter signal on the transmit scanning path.

公开(公告)号：CA2253487C

公开(公告)日：2002-04-16

申请号：CA2253487

申请日：1998-11-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WEN JACK CHI-CHIEH ,  ZAPPALA CHRISTOPHER F ,  RUCKI JOHN STANLEY

IPC: H04B1/48 ,  H04B1/18 ,  H04B7/26 ,  H04B17/00 ,  H04B17/40 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30 ,  H04Q7/38 ,  H04Q7/36

Abstract: A wireless base station has a transmitter and receiver. Transmission signals are applied to an antenna through a transmit bandpass filter that is tuned for a transmit band of frequencies. Received signals from the antenna are applied to the receiver through a receive bandp ass filter that is tuned for a receive band of frequencies An RF switching array consisting of four RF sw itches interconnects the output of the transmitter and the input of the receiver such that normal , loopback (self-test), and scanning modes can be performed. In the normal mode, the antenna is connecte d to the transmitter and receiver through the transmit and receive bandpass filters, respectively . The transmit and signal paths are effectively isolated from each other by three serially-connected o pen switches. In the loopback mode, the transmitter output is connected to the receiver input. In the scanning mode, the antenna is connected to the receiver through the transmit bandpass filter. T he same set of interconnects provides for loopback and normal operation as well as the new scanning operation. The use of switches rather than couplers or couplers for the loopback function r educes noise and crosstalk between transmit and receive signal lines and lower losses in these lines.

公开(公告)号：BR0101070A

公开(公告)日：2001-11-06

申请号：BR0101070

申请日：2001-03-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KOLSRUD ARILD ,  ZAPPALA CHRISTOPHER F

IPC: H01P1/22 ,  H03M1/00 ,  H03M1/12 ,  H03M1/18 ,  H03M1/58

Abstract: A high-power selective signal attenuator (2) includes an attenuator (12) attenuating analog main signals, and a first analog-todigital converter (16) converting output of the attenuator to digital. A digital-to-analog converter (18) reconverts the digital output of the first ADC to analog, and a cancellor (24) receives the main signals and the analog output from the DAC. The cancellor (24) cancels the analog output of the DAC from the main signals to substantially eliminate highpower signals. A second ADC (28) receives the output of the cancellor and generates a digital output. Based on the digital output, control circuitry (32) dynamically controls the attenuation of the attenuator (12) to prevent saturation of the second ADC and to improve information throughput.

公开(公告)号：CA2267714A1

公开(公告)日：1999-11-13

申请号：CA2267714

申请日：1999-03-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： RUCKI JOHN STANLEY ,  WEN JACK CHI-CHIEH ,  ZAPPALA CHRISTOPHER F ,  PAGANO CARMINE JAMES II

IPC: H04B1/40 ,  H04B1/00 ,  H04B1/10 ,  H04B1/12 ,  H04B1/38 ,  H04B1/50 ,  H04B7/00 ,  H04B7/005 ,  H04B7/155 ,  H04B7/26 ,  H04Q7/30

Abstract: A communication system reduces the transmitter overloading of a transmit scanning receiver by reducing transmitter signals transmitted from an overloading transmitter and received by the transmit scanning receiver. A sample of a transmitter signal to be transmitted is obtained from the transmitter before transmission. After the transmitter signal is transmitted and received by the transmit scanning receiver, the sample is used to reduce the transmitter signal at the transmit scanning receiver. To do so, the sample is delayed, adjusted and combined with the transmitter signal. In certain embodiments, a portion of a transmitter signal is obtained from a transmit path of a transmitter prior to transmission and put on a coupled path. The transmitter signal on the coupled path is adjusted and injected into a transmit scanning path of the transmit scanning receiver to combine with a transmitter signal which was transmitted by the transmitter and received at the transmit scanning receiver. A delay element in the coupled path is used to adjust the delay on the coupled path to correspond to the delay experienced by the transmitter signal which was transmitted by the transmitter and then received by the transmit scanning receiver. Amplitude and phase adjusters on the coupled path amplitude and phase adjust the transmitter signal on the coupled path to reduce the transmitter signal on the transmit scanning path. To improve the reduction of the transmitter signal on the transmit scanning path, measurements of at least the transmitter signal on the transmit scanning path can be made, and the measurements can be used to adjust the phase and/or amplitude of the transmitter signals on the coupled path to reduce the level of the transmitter signal on the transmit scanning path. Furthermore, successive cancellation stages comprising parallel coupled paths can be implemented to provide more suppression of the transmitter signal on the transmit scanning path.

公开(公告)号：CA2260281C

公开(公告)日：2007-10-09

申请号：CA2260281

申请日：1999-01-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ZAPPALA CHRISTOPHER F ,  LOUGHRAN KEVIN

IPC: H04B1/16 ,  H04B7/02 ,  H04B7/08 ,  H04B7/26 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30

Abstract: A technique for achieving receive diversity without multiple antennas per ce ll is disclosed. An illustrative embodiment of the present invention comprises: a first antenna for receiving a first information-bearing signal at a first radio frequency; a first downconverter for downconverting the first information-bearing signal to a first intermediate frequency; a first transmitter for transmitting the first information-bearing signal at the fir st intermediate frequency over a first wireline; means for receiving the first information-bearing signal at the first intermediate frequency from the first wireline and for demodulating the firs t information-bearing signal.