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1.发明公开A METHOD AND APPARATUS FOR DEMODULATION OF QAM SIGNAL USING SYMBOL-SPECIFIC AMPLITUDE REFERENCE ESTIMATION 有权解调QAM的方法和设备信号使用符号，特定振幅参考估计
公开(公告)号：EP2304879A1
公开(公告)日：2011-04-06
申请号：EP09766931.1
申请日：2009-01-29
IPC分类号： H04B1/707
CPC分类号： H04B1/712 , H04B1/7105 , H04B2201/709727
摘要： According to the teachings presented herein, 'spreading code' knowledge is used in forming amplitude references for QAM demodulation in a DS-CDMA receiver. Here, 'spreading code' broadly refers to spreading/channelization codes, scrambling codes, or the product of such codes. Further, these teachings apply to any linear DS-CDMA demodulator, such as Rake, Generalized Rake (G-Rake), or chip equalizer, and to nonlinear demodulators that employ linear filtering, such as decision feedback equalizers (DFEs). Advantageously, the determination of symbol-specific amplitude references relies on shared correlation estimates and/or shared combining weights that are common to two or more symbols of interest, thereby significantly reducing processing requirements as compared to the use of symbol-specific impairment correlation estimates.
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公开(公告)号：EP2269318B1
公开(公告)日：2015-04-08
申请号：EP09726265.3
申请日：2009-02-23
发明人： CAIRNS, Douglas A , GRANT, Stephen
CPC分类号： G06F17/12 , H04B1/7115 , H04B1/712 , H04B7/0848 , H04B7/0854 , H04B7/0857 , H04B2201/70707 , H04B2201/709727
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公开(公告)号：EP2269318A1
公开(公告)日：2011-01-05
申请号：EP09726265.3
申请日：2009-02-23
发明人： CAIRNS, Douglas A , GRANT, Stephen
CPC分类号： G06F17/12 , H04B1/7115 , H04B1/712 , H04B7/0848 , H04B7/0854 , H04B7/0857 , H04B2201/70707 , H04B2201/709727
摘要： In receiving equipment such as a mobile terminal (1) for decoding received signals coded according to a CDMA method are decoded in an intermediate processor (9). In the decoding, coefficients or elements of a vector w are calculated in a unit or module (13) by an iterative method as a solution to a system of linear equations represented by the matrix equation Rw = h, where R is a matrix of known elements and h is a known vector. For terminating the iteration, a value of the signal to interference plus noise ratio SINR for the received signals is calculated in each iteration step and then this calculated value or a quantity derived therefrom is used as a stopping criterion or generally in a stopping algorithm.
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4.发明公开EFFICIENT COMPUTATION OF SOFT SCALING FACTORS FOR LINEAR MULTI-USER DETECTOR 审中-公开高效计算软件缩放因子用于对用户更加线性检测器
公开(公告)号：EP2186209A2
公开(公告)日：2010-05-19
申请号：EP08794134.0
申请日：2008-07-30
IPC分类号： H04B1/707
CPC分类号： H04B1/71055 , H04B1/7115 , H04B2201/709727
摘要： A symbol detector (30) converts initial symbol estimates of received symbols to soft estimates for decoding. The symbol detector (30) computes spreading waveform correlations between a spreading waveform for a symbol of interest and spreading waveforms for one or more interfering symbols. Interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating for noise. A soft scaling factor for the symbol of interest is computed from the interference rejection terms. The soft scaling factors are then applied to the initial symbol estimates to generate the soft estimates.
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