36results about How to "Achieving Interference Suppression" patented technology

The invention discloses an optimized weighted CSI feeding back method for cooperative beam forming, which comprises that: in a cooperative beam forming mode, a terminal (UE) estimates the state information of a channel from a service cell to the terminal by using a channel state indication reference signal (CSI-RS); the UE estimates the state information of an equivalent channel from main interfering neighboring cell to the UE by using a demodulation reference signal (DMRS); and the UE calculates a weighted CSI by using the state information of the channel from the service cell to the UE and the state information of the equivalent channel from the main interfering neighboring cell to the UE and feeds the weighted CSI to the service cell. The invention also provides an optimized weighted CSI feeding back device for cooperative beam forming. With the method and the device, channel information interaction between the service cell and the main interfering neighboring cell is not required in the feedback of the weighted CSI.

The invention provides a Femtocell interference suppression method combing with a frequency spectrum distribution and a power control, relates to a Femtocell interference suppression method, and aims to achieve interference suppression between the Femtocell and a macro cellular when the Femetocell and the macro base state adopt a common communication channel configuration or part of the common communication channel configuration. The Femtocell interference suppression method comprises the following steps: firstly, the sensing-based frequency spectrum distribution scheme is used to divide the frequency spectrum into a specific frequency spectrum for the macro cellular and a macro cellular common frequency spectrum for Femtocell; based on Doppler parameter low speed of a reference signal received by a macrocell, the speed of a macro cellular UE (User Experience) around the Femtocell is evaluated; whether the macro cellular user uses the specific frequency spectrum for the macro cellular or not is determined according to the threshold value of the speed; and the used frequency spectrum resource is determined by the reported feedback value of a CQI (Channel Quality Indicator). Meanwhile, the power control means is started when the intensiveness of the Femtocell reaches a certain threshold to evaluate the amount of active Femtocell in each cluster, and the Femtocell initial interference tolerance is set up by broadcast. The invention is suitable for the Femtocell interference suppression.

The invention discloses a passive intermodulation interference cancellation method and system based on a recursive network. The system and the method comprises a passive intermodulation interference cancellation system (a cancellation system for short) based on the recursive network and a passive intermodulation interference cancellation method (a cancellation method for short) based on the recursive network. The cancellation system comprises a feature analysis processing module, a recursive network estimation module and a cancellation feedback adjustment module. The cancellation method comprises the steps of 1, receiving a signal; 2, judging whether the received signal is in a pilot time slot or not, and jumping to the 3 or 6; 3, extracting features and carrying out network initialization; 4, preprocessing the received signal and removing pilot; 5, carrying out prediction training on the recursive network, thereby obtaining a one-step-ahead prediction recursive network; 6, preprocessing a data transmission time slot receiving signal; 7, predicting a PIM interference signal of a next moment by employing a result of the 5, and finishing interference cancellation; 8, processing collected difference values before and after decoding, feeding back a processing result, and updating network parameters; and 9, judging whether cancellation is finished or not, and deciding to wait or to jump to the 6. According to the method and the device, the system adaptability is high, the cancellation precision is high, and the hardware realization is easy.