公开(公告)号：EP2756644A4

公开(公告)日：2015-07-15

申请号：EP11872306

申请日：2011-09-14

Applicant: ST ERICSSON SA

Inventor： TANG ZHIXUN ,  LI XIE ,  ZHANG LIPING

IPC: H04L25/02 ,  H04L25/03 ,  H04W52/24

CPC classification number: H04W52/24 ,  H04L25/0206 ,  H04L25/0212 ,  H04L25/0216 ,  H04L25/0218 ,  H04L2025/03414

Abstract: The embodiment of the invention discloses a method, device and computer program for denoising in channel estimation. The method comprises steps of: calculating a noise power value and a power value of each path in each user window based on a channel estimation result, the user window is referred to channel impulse response window corresponding to this user; calculating a denoising threshold factor based on the noise power value and the power value of each path in each user window; calculating a denoising threshold value based on the noise power value and the denoising threshold factor; and performing a denoising processing on the channel estimation result by using the denoising threshold value.

公开(公告)号：EP2761764A4

公开(公告)日：2015-07-22

申请号：EP11873036

申请日：2011-09-27

Applicant: ST ERICSSON SA

Inventor： TANG ZHIXUN ,  LI XIE ,  ZHUANG LIANG

IPC: H04B1/707 ,  H04B1/7105 ,  H04J11/00

CPC classification number: H04J13/0077 ,  H04B1/707 ,  H04B1/7105 ,  H04B2201/70714 ,  H04J11/0046 ,  H04J11/005

Abstract: This invention relates to a method and an apparatus for code activation, and a computer program and a storage medium thereof. A combined channel impulse response for each code is calculated based on a channelization code, a scrambling code and a channel impulse response corresponding to the code; a statistical result of the correlations between each interference code and all user codes is obtained; an active interference code number is determined; the determined number of interference codes, are activated, wherein a selection of which interference codes to activate is based on the statistical result. In some embodiments of this invention, the interference codes having a close correlation with the user codes may be selected to be activated, thereby the performance of joint detection is improved. In some embodiments of this invention, the complexity of the subsequent joint detection will be remarkably reduced on the premise of ensuring the performance of the joint detection.

公开(公告)号：EP2759066A4

公开(公告)日：2015-07-15

申请号：EP11872872

申请日：2011-09-20

Applicant: ST ERICSSON SA

Inventor： TANG ZHIXUN ,  LI XIE ,  ZHANG LIPING ,  ZHANG DAIJUN

IPC: H04B1/7105 ,  H04B1/7107

CPC classification number: H04B1/7105 ,  H04B1/7107 ,  H04B2201/70702

Abstract: A method, apparatus, receiver, computer program and storage medium for joint detection are disclosed. The joint detection method includes categorizing interference signals based on level of interference so as to obtain a strong interference signal, cancelling the strong interference signal from a received signal, and performing a joint detection by utilizing a matched filtering result of a remaining signal. In one embodiment, it is to firstly determine whether a strong interference codes corresponding to an intra-frequency adjacent cell exists in an active code list or not, recovering a strong interference signal transmitted by a Node B if the strong interference codes exists, applying an interference cancellation to a received signal received by a receiver so as to obtain a matched filtering result of a remaining signal derived by subtracting the strong interference signal from the received signal, performing a joint detection by utilizing the matched filtering result of the remaining signal, and outputting a demodulated result. In at least one embodiment, the computation complexity of the joint detection is reduced, and the accuracy of the joint detection is improved.

公开(公告)号：EP2756603A4

公开(公告)日：2015-06-03

申请号：EP11872402

申请日：2011-09-14

Applicant: ST ERICSSON SA

Inventor： TANG ZHIXUN ,  LI XIE ,  ZHANG LIPING

IPC: H04B1/7107 ,  H04B1/7103 ,  H04J11/00

CPC classification number: H04L5/0073 ,  H04B1/7107 ,  H04B2201/709745 ,  H04L25/0202 ,  H04L25/0204