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公开(公告)号：JP2001292187A
公开(公告)日：2001-10-19
申请号：JP2001057529
申请日：2001-03-02
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , SUBRAMANIAN SURESH , THOMSON DAVID J
Abstract: PROBLEM TO BE SOLVED: To provide a method and device to be used in a transmitter-receiver or a wireless system capable of carrying out analog mode operation by using a common phase (I) and an orthogonal (Q) value. SOLUTION: In the case of operation in the analog mode, the device is provided with a processor for receiving a pair of digital I and Q related with an audio or data signal, carrying out FM demodulation and generating information contents related with the audio or data signal. In the case of receiving data in the analog mode, data takes a specific format. In order to decode data, a processor recognizes each bit to five-times of repeating of a radio link word(RLW), generates confidence related to each bit and stores it. The confidence is based, on which of 1 or 0 the waveform aproximates and its signal intensity. When the noise of the waveform is comparatively small and the RF signal intensity is comparatively large, the processor assigns a larger weight by judging whether the waveform assigns 1 or 0.
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公开(公告)号：JP2001292186A
公开(公告)日：2001-10-19
申请号：JP2001056416
申请日：2001-03-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , THOMSON DAVID J
Abstract: PROBLEM TO BE SOLVED: To use the same hardware component in operation in a TDMA mode and an analog mode. SOLUTION: In transmission in the analog mode, a processor 40 encodes the digital expression of a signal to be transmitted, FM-modulates it to an I-Q pair and outputs it to a digital analog converter(DAC) 31. The DAC 31 converts a digital I-Q pair to an analog signal and outputs it to an I-Q cosign wave generator 32 which generates a common-phase cosine wave and an orthogonal cosine wave having amplitude respectively proportional to the values of I and Q. These consine waves are added for transmission by radio. In the case of receiving in the analog mode, a frequency converter down-converts a received radio frequency(RF) to an intermediate frequency(IF). A digital down converter converts the received signal into digital I value and Q value and outputs them to a processor.
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公开(公告)号：JP2001237757A
公开(公告)日：2001-08-31
申请号：JP2000401307
申请日：2000-12-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ANDREWS MICHAEL R , MITRA PARTHA PRATIM , THOMSON DAVID J
Abstract: PROBLEM TO BE SOLVED: To suppress fading in a multiple path environment and to turn a defect of the presence of a reflection surface into an advantage, by using a 3rd polarization direction where a 3rd communication channel is generated effectively. SOLUTION: A third communication channel can be used for transmitting more information or transmitting the information having improved space diversity, so that the total communication performance is improved. The transmitting signal, having three polarization directions, is produced by a transmitter having three dipole antennas which are orthogonal to each other in a space, for example. The reception signal, having energy components in three polarization directions, is detected by a receiver having three dipole antennas orthogonal to each other in a space, for example.
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公开(公告)号：JPH10285231A
公开(公告)日：1998-10-23
申请号：JP3183698
申请日：1998-02-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KNOEDL GEORGE JR , THOMSON DAVID J
Abstract: PROBLEM TO BE SOLVED: To realize excellent phase accuracy by an optional spectral shaping under the limitation of a constant envelope signal. SOLUTION: A modulation oscillator is made up of a voltage controlled oscillator 43, a detector 41, and a reference oscillator 40. A phase locked loop is formed by providing an output of a voltage denoting a difference of frequencies or phases of outputs of the voltage controlled oscillator 43 and the reference oscillator 40. The modulation oscillator has a phase modulation means 71 that corrects a feedback signal of the phase locked loop in response to a signal given to a modulator input 72. The corrected feedback signal is given to the modulation input 72 to directly modulate a radio frequency output of the voltage controlled oscillator 43. The accumulated phase of the radio frequency output modulated by the voltage controlled oscillator 43 is limited to a prescribed range (e.g. 2π). An RF output of the modulation oscillator is able to be directly connected to an antenna 44.
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公开(公告)号：AU2319101A
公开(公告)日：2001-09-06
申请号：AU2319101
申请日：2001-02-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , THOMSON DAVID J , SUBRAMANIAN SURESH
Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. When operating in the analog mode, the apparatus comprises a processor that receives digital I, Q pairs relating to audio or data signals and performs FM demodulation to generate information content relating to the audio or data signals. When receiving data in the analog mode, the data is in a particular format. In order to decode the data, the processor looks at each bit of the data for five repeats of Radio Link Words (RLWs) and generates and stores a confidence factor associated with each bit. The confidence factor is based on how closely the waveform represents a 1 or a 0 as well as the signal strength. If the waveform has relatively little noise and if the RF signal strength is relatively high, the processor assigns more weight to its determination as to whether the waveform represents a 1 or a 0. Once this process has been performed for each repeat of the current RLW, the processor takes the sum of the confidence factors associated with each bit and compares the sum to a threshold level to determine whether the bit is a 1 or a 0. A signaling tone detection routine is utilized to distinguish between when data is being received and when signaling tone is being received.
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Patent Agency Ranking
公开(公告)号：BR0100824A
公开(公告)日：2001-10-30
申请号：BR0100824
申请日：2001-02-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , THOMSON DAVID J
Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. The apparatus comprises a processor that performs FM modulation to generate I, Q pairs when operating in the analog mode. When transmitting in the analog mode, the processor encodes a digital representation of the signal to be transmitted into I, Q pairs and outputs the I, Q pairs to a digital-to-analog converter (DAC) comprised by the apparatus. The DAC converts the digital I, Q pairs into analog signals and outputs the analog signals to a cosine wave generator, which generates an in-phase cosine wave and an out-of-phase cosine wave having amplitudes that are proportional to the I and Q values, respectively. The cosine waves are summed for transmission over air. When receiving in the analog mode, a digital down converter converts the received signal into digital I and Q values. The processor then demodulates the I and Q values into a digital representation of the received signal to extract the signal content. When transitioning from transmitting data to transmitting audio, and vice versa, the processor ensures that abrupt changes in the phases of the I, Q pairs do not occur.
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公开(公告)号：CA2331912C
公开(公告)日：2005-03-15
申请号：CA2331912
申请日：2001-01-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , SUBRAMANIAN SURESH , THOMSON DAVID J
Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. When operating in the analog mode, the apparatus comprises a process or that receives digital I, Q pairs relating to audio or data signals and performs F M demodulation to generate information content relating to the audio or data signals. When receiving data in the analog mode, the data is in a particular format. In order to decode t he data, the processor looks at each bit of the data for five repeats of Radio Link Words (RLWs) and generates and stores a confidence factor associated with each bit. The confidence factor is based on how closely the waveform represents a 1 or a 0 as well as the signa l strength. If the waveform has relatively little noise and if the RF signal strength is relatively high, the processor assigns more weight to its determination as to whether the wavefor m represents a 1 or a 0. Once this process has been performed for each repeat of the current RLW, the processor takes the sum of the confidence factors associated with each bit a nd compares the sum to a threshold level to determine whether the bit is a 1 or a 0. A signaling tone detection routine is utilized to distinguish between when data isbeing received and when signaling tone is being received.
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公开(公告)号：AU2326301A
公开(公告)日：2001-09-06
申请号：AU2326301
申请日：2001-02-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , THOMSON DAVID J
Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. The apparatus comprises a processor that performs FM modulation to generate I, Q pairs when operating in the analog mode. When transmitting in the analog mode, the processor encodes a digital representation of the signal to be transmitted into I, Q pairs and outputs the I, Q pairs to a digital-to-analog converter (DAC) comprised by the apparatus. The DAC converts the digital I, Q pairs into analog signals and outputs the analog signals to a cosine wave generator, which generates an in-phase cosine wave and an out-of-phase cosine wave having amplitudes that are proportional to the I and Q values, respectively. The cosine waves are summed for transmission over air. When receiving in the analog mode, a digital down converter converts the received signal into digital I and Q values. The processor then demodulates the I and Q values into a digital representation of the received signal to extract the signal content. When transitioning from transmitting data to transmitting audio, and vice versa, the processor ensures that abrupt changes in the phases of the I, Q pairs do not occur.
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公开(公告)号：CA2331912A1
公开(公告)日：2001-09-03
申请号：CA2331912
申请日：2001-01-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , SUBRAMANIAN SURESH , THOMSON DAVID J
Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. When operating in the analog mode, the apparatus comprises a process or that receives digital I, Q pairs relating to audio or data signals and performs F M demodulation to generate information content relating to the audio or data signals. When receiving data in the analog mode, the data is in a particular format. In order to decode t he data, the processor looks at each bit of the data for five repeats of Radio Link Words (RLWs) and generates and stores a confidence factor associated with each bit. The confidence factor is based on how closely the waveform represents a 1 or a 0 as well as the signa l strength. If the waveform has relatively little noise and if the RF signal strength is relatively high, the processor assigns more weight to its determination as to whether the wavefor m represents a 1 or a 0. Once this process has been performed for each repeat of the current RLW, the processor takes the sum of the confidence factors associated with each bit a nd compares the sum to a threshold level to determine whether the bit is a 1 or a 0. A signaling tone detection routine is utilized to distinguish between when data is being received and when signaling tone is being received.
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公开(公告)号：BR0100685A
公开(公告)日：2001-11-06
申请号：BR0100685
申请日：2001-02-21
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LEONARD ERIC DAVID , THOMSON DAVID J , SUBRAMANIAN SURESH
Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. When operating in the analog mode, the apparatus comprises a processor that receives digital I, Q pairs relating to audio or data signals and performs FM demodulation to generate information content relating to the audio or data signals. When receiving data in the analog mode, the data is in a particular format. In order to decode the data, the processor looks at each bit of the data for five repeats of Radio Link Words (RLWs) and generates and stores a confidence factor associated with each bit. The confidence factor is based on how closely the waveform represents a 1 or a 0 as well as the signal strength. If the waveform has relatively little noise and if the RF signal strength is relatively high, the processor assigns more weight to its determination as to whether the waveform represents a 1 or a 0. Once this process has been performed for each repeat of the current RLW, the processor takes the sum of the confidence factors associated with each bit and compares the sum to a threshold level to determine whether the bit is a 1 or a 0. A signaling tone detection routine is utilized to distinguish between when data is being received and when signaling tone is being received.
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