公开(公告)号：IN2568CHN2014A

公开(公告)日：2015-08-07

申请号：IN2568CHN2014

申请日：2014-04-04

Applicant: QUALCOMM INC

Inventor： YOO TAESANG ,  LUO TAO ,  SCHOENEICH HENDRIK ,  RAJIH MYRIAM ,  ZHAO LU

IPC: H04L25/03 ,  H04J11/00 ,  H04L1/00

Abstract: Certain aspects of the present disclosure relate to a hybrid approach for Physical Downlink Shared Channel (PDSCH) Interference Cancellation (IC). In certain aspects if the PDSCH information is known for a serving cell but not be known for interfering cell(s) a hybrid approach that involves using Codeword level IC (CWIC) for the serving cell and using Symbol level IC (SLIC) for the interfering cells may be used for better IC performance. The hybrid IC approach may start with a UE attempting to decode the serving cell PDSCH. If the decode is unsuccessful the UE may perform CWIC for the serving cell followed by SLIC using the results of the CWIC stage. After the SLIC stage the UE may attempt to decode the serving cell PDSCH again. The UE may perform multiple operations of this method until the serving cell PDSCH is successfully decoded or a maximum number of iterations is reached.

公开(公告)号：IN3350CHN2014A

公开(公告)日：2015-07-03

申请号：IN3350CHN2014

申请日：2014-05-02

Applicant: QUALCOMM INC

Inventor： YOO TAESANG ,  SCHOENEICH HENDRIK ,  LUO TAO ,  WEI YONGBIN ,  RAJIH MYRIAM ,  MALLADI DURGA PRASAD

IPC: H04J11/00 ,  H04B7/04 ,  H04B17/00

Abstract: In order to cancel any interference due to the second cell signal (e.g. from a non serving cell) from a signal received at a UE without receiving additional control information the UE blindly estimates parameters associated with decoding the second cell signal. This may include determining a metric based on sets of symbols associated with the cell signals in order to determine parameters for the second cell signal e.g. the transmission mode modulation format and/or spatial scheme of the second cell signal. The parameters for the signal may be determined based on a comparison of the metric with a threshold. When a spatial scheme and a modulation format is unknown the blind estimation may include determining a plurality of constellations of possible transmitted modulated symbols associated with a potential spatial scheme and modulation format combination. Interference cancellation can be performed using the constellations and a corresponding probability weight.