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1.发明公开
公开(公告)号：EP1766835A1
公开(公告)日：2007-03-28
申请号：EP05750353.4
申请日：2005-06-10
CPC分类号： H04L1/20 , H04B2201/709727 , H04L1/0003 , H04L1/0026 , H04L1/206
摘要： A receiver circuit suppre ses effects of 'benign' impairment from the calculation of received signal quality estimates, such that the estimate depends primarily on the effects of non-benign impairment. For example, a received signal may be subject to same-cell and other cell interference plus noise, which is generally modeled using a Gaussian distribution, and also may be due to certain forms of self-interference, such as quadrature phase interference arising from imperfect de-rotation of the pilot samples used to generate channel estimates for the received signal. Such interference generally takes on a distribution defined by the pilot signal modulation, e.g., a binomial distribution for binary phase shift keying modulation. Interference arising from such sources is relatively 'benign' as compared to Gaussian interference and thus should be suppressed or otherwise discounted in signal quality calculations. Suppression may be based on subtracting benign impairment correlation estimates from total impairment correlation estimates, or on filtering the benign impairment in channel estimation.
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公开(公告)号：EP1616393A2
公开(公告)日：2006-01-18
申请号：EP04749803.5
申请日：2004-04-06
IPC分类号： H04B1/707
CPC分类号： H04B1/7105 , H04B1/709 , H04B1/712 , H04L25/03171 , H04L25/03331
摘要： A CDMA communication system uses a RAKE receiver, a code correlator and a multi-code joint detector to jointly detect symbols in two or more received signals contained within a composite signal. The RAKE receiver separates the composite signal into two or more RAKE output signals by despreading the composite signal using selected spreading codes. The multi-code joint detector jointly detects the symbols in the received signals using the RAKE receiver output signals, cross-correlations between the spreading codes generated by the code correlator, and RAKE combining weights based on a noise covariance matrix. The multi-code joint detector also includes a trellis that represents possible states and state transitions and a branch metric calculator for calculating branch metrics associated with the state transitions based on the RAKE receiver output signals and the cross-correlations between the spreading codes.
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公开(公告)号：EP2119079A1
公开(公告)日：2009-11-18
申请号：EP07748397.2
申请日：2007-04-12
CPC分类号： H04W72/0406 , H04B2201/709727 , H04W4/18 , H04W48/08 , H04W72/082
摘要： Method and apparatuses taught herein enable link adaptation feedback to be determined in advance for future transmit intervals, based on one or more data sending units sending indications of future transmit resource allocations, and receiving corresponding link adaptation feedback from data receiving units. Knowledge of the future transmit resource allocations enable individual data sending units to predict interference conditions for the future transmit interval, and thereby compute link adaptation feedback that takes advantage of low- interference conditions. Individual data sending units receive link adaptation feedback for the future transmit interval from the data receiving units they are supporting, and make corresponding link adaptations for the future transmit interval. Such operations are, in one or more embodiments, carried out in a Wideband Code Division Multiple Access (WCDMA), Long Term Evolution LTE), or WiMAX network, wherein the data sending units comprise radio base stations, and the data receiving units comprise wireless communication devices.
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4.发明授权
公开(公告)号：EP1323236B1
公开(公告)日：2009-06-03
申请号：EP01974324.4
申请日：2001-10-04
发明人： DENT, Paul , BOTTOMLEY, Gregory , ATARIUS, Roozbeh
CPC分类号： H04B1/7087 , H04B1/712 , H04L2027/0055 , H04L2027/0093
摘要： A frequency offset is estimated between at least one frequency of at least one transmitter and a local reference frequency of a receiver. Received signals are processed using the local frequency reference oscillator to obtain representative complex numerical samples which are correlated with shifts of a locally generated despreading code to produce a number of complex channel estimates, each corresponding to a different delayed ray of the multipath propagation channel. A frequency error estimate is computed for each ray based on successive values of a respective one of the channel estimates. A weighted summation is formed of the frequency error estimate to provide a relative frequency error estimate to control the local frequency reference.
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5.发明公开
公开(公告)号：EP2070201A2
公开(公告)日：2009-06-17
申请号：EP07769059.2
申请日：2007-07-09
发明人： BOTTOMLEY, Gregory , COZZO, Carmela
CPC分类号： H04L25/0242 , H04B1/712 , H04B2201/709727 , H04L25/0228
摘要： Channel response and impairment correlation estimates are iteratively determined. According to one embodiment of performing channel estimation for use in received signal processing, a channel response estimate is calculated based on an initial impairment correlations estimate and a measured channel response derived from a received signal. A revised impairment correlations estimate is calculated using a parametric approach based on the channel response estimate and the channel response estimate is recalculated based on the revised impairment correlations estimate. According to one embodiment of a wireless communication device, the device comprises a parameter estimation unit configured to iteratively calculate a medium channel response estimate based on a parametric impairment correlations estimate and a measured net channel response derived from a received signal. The wireless communication device also comprises circuitry configured to control how many times the parameter estimation unit calculates the medium channel response estimate.
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6.发明公开METHOD OF CLOSED LOOP POWER CONTROL ADJUSTED BY SELF- INTERFERENCE AND APPARATUS 有权法的电力控制与闭环控制，适应了自干扰和设备
公开(公告)号：EP2250840A1
公开(公告)日：2010-11-17
申请号：EP08871950.5
申请日：2008-11-28
发明人： RAO, Jing , HE, Ning , BJÖRKEGREN, Håkan , EDHOLM, Christer , TIDESTAV, Claes , BOTTOMLEY, Gregory
IPC分类号： H04W52/12
CPC分类号： H04W52/241 , H04W52/12 , H04W52/146
摘要： A method and apparatus for controlling the transmit power of a mobile device in a mobile communication network takes the level of self-interference into account to perform inner-loop power control. For normal inner-loop power control, a signal quality estimate is compared to a signal quality target and power control commands are generated based on the comparison. When self-interference is the dominant impairment in the received signal, a 'fast break' is introduced to change inner-loop power control command generation.
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公开(公告)号：EP1616393B1
公开(公告)日：2007-01-10
申请号：EP04749803.5
申请日：2004-04-06
IPC分类号： H04B1/707
CPC分类号： H04B1/7105 , H04B1/709 , H04B1/712 , H04L25/03171 , H04L25/03331
摘要： A CDMA communication system uses a RAKE receiver, a code correlator and a multi-code joint detector to jointly detect symbols in two or more received signals contained within a composite signal. The RAKE receiver separates the composite signal into two or more RAKE output signals by despreading the composite signal using selected spreading codes. The multi-code joint detector jointly detects the symbols in the received signals using the RAKE receiver output signals, cross-correlations between the spreading codes generated by the code correlator, and RAKE combining weights based on a noise covariance matrix. The multi-code joint detector also includes a trellis that represents possible states and state transitions and a branch metric calculator for calculating branch metrics associated with the state transitions based on the RAKE receiver output signals and the cross-correlations between the spreading codes.
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公开(公告)号：EP2119079B1
公开(公告)日：2016-11-09
申请号：EP07748397.2
申请日：2007-04-12
IPC分类号： H04W4/18
CPC分类号： H04W72/0406 , H04B2201/709727 , H04W4/18 , H04W48/08 , H04W72/082
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9.发明授权METHOD OF CLOSED LOOP POWER CONTROL ADJUSTED BY SELF-INTERFERENCE AND APPARATUS 有权法的电力控制与闭环控制，适应了自干扰和设备
公开(公告)号：EP2250840B1
公开(公告)日：2016-02-24
申请号：EP08871950.5
申请日：2008-11-28
发明人： RAO, Jing , HE, Ning , BJÖRKEGREN, Håkan , EDHOLM, Christer , TIDESTAV, Claes , BOTTOMLEY, Gregory
CPC分类号： H04W52/241 , H04W52/12 , H04W52/146
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