公开(公告)号：EP2245753A1

公开(公告)日：2010-11-03

申请号：EP09715398.5

申请日：2009-01-22

申请人： Telefonaktiebolaget L M Ericsson (PUBL)

发明人： GRANT, Stephen J. ,  CAIRNS, Douglas A.

IPC分类号： H04B1/707

CPC分类号： H04B7/0426 ,  H04B1/712 ,  H04B2201/709727

摘要： Methods and apparatus for estimating code-reuse interference associated with a multi- stream multiple-input multiple-output (MIMO) signal are disclosed. An estimate for the data-to- pilot power ratio is obtained as a by-product of parametric estimation of impairment covariance associated with the received MIMO signal. In an exemplary method, a parametric impairment model is constructed (510) for a received MIMO signal, the parametric model omitting code- reuse interference. Impairment covariance is measured (520), using received pilot symbol data. The parametric impairment model is fitted (530) to the measured impairment covariance to obtain one or more scaling parameter values. A per-code energy value for a first data stream is then calculated from the one or more scaling parameter values. In some embodiments, the data-to-pilot power ratio for the received signal is first calculated (540) from the one or more scaling parameters, and the per-code energy value calculated (550) from the data-to-pilot power ratio.

公开(公告)号：EP2245753B1

公开(公告)日：2011-08-31

申请号：EP09715398.5

申请日：2009-01-22

申请人： Telefonaktiebolaget L M Ericsson (PUBL)

发明人： GRANT, Stephen J. ,  CAIRNS, Douglas A.

IPC分类号： H04B1/707

CPC分类号： H04B7/0426 ,  H04B1/712 ,  H04B2201/709727

摘要： Methods and apparatus for estimating code-reuse interference associated with a multi- stream multiple-input multiple-output (MIMO) signal are disclosed. An estimate for the data-to- pilot power ratio is obtained as a by-product of parametric estimation of impairment covariance associated with the received MIMO signal. In an exemplary method, a parametric impairment model is constructed (510) for a received MIMO signal, the parametric model omitting code- reuse interference. Impairment covariance is measured (520), using received pilot symbol data. The parametric impairment model is fitted (530) to the measured impairment covariance to obtain one or more scaling parameter values. A per-code energy value for a first data stream is then calculated from the one or more scaling parameter values. In some embodiments, the data-to-pilot power ratio for the received signal is first calculated (540) from the one or more scaling parameters, and the per-code energy value calculated (550) from the data-to-pilot power ratio.

公开(公告)号：EP1779537A2

公开(公告)日：2007-05-02

申请号：EP05761069.3

申请日：2005-07-19

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： GRANT, Stephen J. ,  MOLNAR, Karl J.

IPC分类号： H04B1/69 ,  H04L27/01 ,  H04L1/06

CPC分类号： H04B1/712 ,  H04B1/71057 ,  H04B7/02 ,  H04B7/0848 ,  H04B2201/709727

摘要： A receiver includes a receiver circuit that decodes multiple signals of interest contained in a composite receive signal. The receiver comprises at least one Generalized RAKE combining circuit and a joint demodulation circuit and generates a detected signal at an output. The joint demodulation circuit contains a reduced search soft value generator circuit and generates soft bit values that represent coded bits received from the transmitter.

公开(公告)号：EP1779537B1

公开(公告)日：2013-07-10

申请号：EP05761069.3

申请日：2005-07-19

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： GRANT, Stephen J. ,  MOLNAR, Karl J.

IPC分类号： H04B1/7115 ,  H04B1/7105 ,  H04B7/08

CPC分类号： H04B1/712 ,  H04B1/71057 ,  H04B7/02 ,  H04B7/0848 ,  H04B2201/709727