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公开(公告)号：CA2318271C
公开(公告)日：2003-01-21
申请号：CA2318271
申请日：1998-12-29
Applicant: MOTOROLA INC
Inventor： LAIRD KEVIN MICHAEL , WHINNETT NICHOLAS WILLIAM
Abstract: In a wireless communication system, a chip time is selected in a complex pseudonoise (PN) sequence generator (130, 132). For a next chip time followi ng the selected chip time, a phase difference between a previous complex PN chi p and a next complex PN chip is restricted to a preselected phase angle (204). In one embodiment, every other chip time is selected and the preselected ang le is 90 degrees (216, 218).
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公开(公告)号：CA2373469A1
公开(公告)日：2001-09-27
申请号：CA2373469
申请日：2001-03-12
Applicant: MOTOROLA INC
Inventor： CHEN JIANGNAN , LAIRD KEVIN MICHAEL , ZHOU FRANK FEI
Abstract: A method and apparatus for long code generation in synchronous, multi-chip rate systems (200), wherein a first code sequence having a first bit rate (205), and a second code sequence having the first bit rate (215, 225), the second code sequence being a time delay (210, 212) of the first code sequenc e, are multiplexed together (208), producing a desired long code (216).
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公开(公告)号：BR9808124A
公开(公告)日：2000-03-08
申请号：BR9808124
申请日：1998-01-20
Applicant: MOTOROLA INC
Inventor： LAIRD KEVIN MICHAEL , SMITH JACK ANTHONY
Abstract: A peak-reducing waveform is estimated and summed with a composite signal to reduce the peak-to-average power ratio of the composite signal. The estimate of the peak-reducing waveform is modified to have Walsh code components orthogonal to the assigned Walsh codes. An iterative process of estimating subsequent peak-reducing waveform is implemented to produce a peak-reducing waveform which, when summed with the composite signal, results in a composite signal having a peak-to-average ratio at a desired level and thus does not have the effects of remodulating the assigned Walsh codes. Constraints on the magnitude of the unassigned Walsh code components can be included for controlling the power level under the unassigned Walsh codes.
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公开(公告)号：AU686046B2
公开(公告)日：1998-01-29
申请号：AU4610696
申请日：1995-12-28
Applicant: MOTOROLA INC
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公开(公告)号：FI962101A0
公开(公告)日：1996-05-17
申请号：FI962101
申请日：1996-05-17
Applicant: MOTOROLA INC
Inventor： LAIRD KEVIN MICHAEL , SMITH SYBREN , MARKO PAUL D , WADIN CRAIG P
Abstract: A method and apparatus for mitigating error in a received communications signal includes an error mitigator (35) of a communication unit (12) which receives and performs mitigation based on an error indication. In a first embodiment the error indication is a phase or non-used data symbol indicating error in ADPCM data, and mitigation includes changing certain nibble values to different predetermined values. In a second embodiment the error indication may include other parameters, e.g., a CRC frame error indicator, and an error estimator (34) determines a level of corruption in the ADPCM data. The error mitigator (35) applies a predetermined set of replacement values based on the indicated level of corruption and the mitigated data is subsequently decoded in an ADPCM decoder (26).
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Patent Agency Ranking
公开(公告)号：FI962101A
公开(公告)日：1996-05-17
申请号：FI962101
申请日：1996-05-17
Applicant: MOTOROLA INC
Inventor： LAIRD KEVIN MICHAEL , SMITH SYBREN , MARKO PAUL D , WADIN CRAIG P
Abstract: A method and apparatus for mitigating error in a received communications signal includes an error mitigator (35) of a communication unit (12) which receives and performs mitigation based on an error indication. In a first embodiment the error indication is a phase or non-used data symbol indicating error in ADPCM data, and mitigation includes changing certain nibble values to different predetermined values. In a second embodiment the error indication may include other parameters, e.g., a CRC frame error indicator, and an error estimator (34) determines a level of corruption in the ADPCM data. The error mitigator (35) applies a predetermined set of replacement values based on the indicated level of corruption and the mitigated data is subsequently decoded in an ADPCM decoder (26).
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公开(公告)号：FI953190A
公开(公告)日：1995-06-28
申请号：FI953190
申请日：1995-06-28
Applicant: MOTOROLA INC
Inventor： PINCKLEY DANNY THOMAS , LAIRD KEVIN MICHAEL , LYNK JR CHARLES N
Abstract: An apparatus and method of reducing a peak envelope power of a linear power amplifier (10) amplifying a plurality of channels is provided. The method includes the steps of measuring (104) the peak envelope power of the linear power amplifier, measuring a channel activity level (101) of each channel of the plurality of channels, and, when the peak envelope power exceeds a first threshold, changing (103, 106) at least one parameter of a channel of the plurality of channels having a channel activity level exceeding a second threshold to reduce the peak envelope power.
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公开(公告)号：AU7797794A
公开(公告)日：1995-05-22
申请号：AU7797794
申请日：1994-09-16
Applicant: MOTOROLA INC
Inventor： PINCKLEY DANNY THOMAS , LAIRD KEVIN MICHAEL , LYNK CHARLES N JR
Abstract: An apparatus and method of reducing a peak envelope power of a linear power amplifier (10) amplifying a plurality of channels is provided. The method includes the steps of measuring (104) the peak envelope power of the linear power amplifier, measuring a channel activity level (101) of each channel of the plurality of channels, and, when the peak envelope power exceeds a first threshold, changing (103, 106) at least one parameter of a channel of the plurality of channels having a channel activity level exceeding a second threshold to reduce the peak envelope power.
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公开(公告)号：EP0800737A4
公开(公告)日：2002-07-24
申请号：EP95944265
申请日：1995-12-28
Applicant: MOTOROLA INC
Inventor： LUREY DANIEL MORRIS , ROTTINGHAUS ALAN P , RADER SHEILA MARIE , LUZ YUDA YEHUDA , SMITH PAUL FIELDING , SMITH JOHN M , PINCKLEY DANNY THOMAS , LAIRD KEVIN MICHAEL , KOBRINETZ TONY , ELDER ROBERT C , BAILEY DONALD E
IPC: H04L27/18 , H01Q1/24 , H01Q3/26 , H03D3/00 , H03M1/12 , H04B1/04 , H04B1/26 , H04B1/28 , H04B7/06 , H04B7/08 , H04B7/24 , H04J1/05 , H04L1/06 , H04L1/22 , H04L25/14 , H04L27/26 , H04W88/08 , H04L27/06 , H04B7/04 , H04L27/20
CPC classification number: H04B7/0691 , H01Q1/246 , H01Q3/2605 , H03D3/006 , H03M1/121 , H04B1/0003 , H04B1/001 , H04B1/0032 , H04B1/26 , H04B1/28 , H04B7/06 , H04B7/0802 , H04B7/0874 , H04B7/24 , H04J1/05 , H04L1/06 , H04L1/22 , H04L25/14 , H04L27/2647 , H04W88/08
Abstract: A digital receiver (200) and a transmitter (300), wherein the digital receiver includes a plurality of antennas (202) for receiving uplink radio frequency signals; a plurality of analog to digital converters (210) for converting the received radio frequency signals into digital signals; a switched digital down converter (214) for down converting one of the digital signals to a baseband IF signal; and a channel processor (228) for recovering one of a plurality of communication channels contained within the baseband IF signal.
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10.发明公开
公开(公告)号：EP1196999A4
公开(公告)日：2004-07-21
申请号：EP00921661
申请日：2000-04-04
Applicant: MOTOROLA INC
Inventor： SMITH PAUL FIELDING , LAIRD KEVIN MICHAEL , PINCKLEY DANNY THOMAS
CPC classification number: H03D7/00
Abstract: In a digital preprocessing system for processing a digital signal for analog transmission, the digital signal is up-sampled to produce a digital up-sampled signal having signal components in a plurality of Nyquist bands including a first Nyquist band and a plurality of super-Nyquist bands at higher frequencies than the first Nyquist band, wherein the first Nyquist band includes a baseband signal component and a plurality of aliased signal components. Thereafter, one of the plurality of signal components in the first Nyquist band is selected from the digital up-sampled signal. Finally, the selected one of the plurality of signal components is output at a frequency that will cause a digital to analog converter to output an aliased signal component in a super-Nyquist band nearer an anticipated peak amplitude of a filtering characteristic of the digital to analog converter than an aliased signal component in the super-Nyquist band that would be output by the digital to analog converter processing the baseband signal component.
Abstract translation: 在用于处理模拟传输的数字信号的数字预处理系统中，数字信号被上采样在奈奎斯特频带包括第一奈奎斯特带和超奈奎斯特的多个A多元性以产生一个数字上采样具有信号的信号分量 带在比第一奈奎斯特频带，worin第一奈奎斯特带包括基带信号成分和混叠信号分量的若干高的频率。 有后，在第一奈奎斯特频带的信号分量的多个一从数字上采样的信号选择。 最后，信号分量的多个所选择的一个是频率输出thatwill引起数字到在超奈奎斯特带更靠近模拟转换器，以输出到混叠信号分量的数字到模拟的滤波特性的预期峰值幅度 转换器，而不是在超奈奎斯特带的混叠信号分量也将是由数字输出到模拟转换器处理所述基带信号分量。
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