3 results about "Prototype filter" patented technology

This invention discloses an optimal pairwise pilot design method for a filter bank multicarrier communication system. First, based on the pairwise pilot channel estimation method, a pilot optimization model is established, and expressions for inherent interference and prototype filters are given in the model. Then, using differentiation analysis, the optimal pilot values ​​are determined under constraint boundary conditions, thus transforming the constraints of the pilot optimization model into equality constraints. Finally, optimal pairwise pilot structures applicable to different prototype filters are provided, and these structures are used as pilot designs for the pairwise pilot channel estimation method. Using this method, only two columns of pilot symbols are needed for channel estimation, and different pilot structures are adopted according to the type of prototype filter, thereby reducing pilot load while adapting to different communication scenarios.

A decoding method and an encoding method applying filter coefficient update are provided. The decoding method includes: determining a plurality of reference samples for a prediction mode; determining a prototype filter; acquiring an updated filter based on the prototype filter by trimming and / or truncating one or more coefficients of the prototype filter; and filtering the plurality of reference samples with the updated filter to generate predicted samples of a current block.

The invention discloses a sound field control method, a measurement device, electronic equipment and a readable storage medium, and relates to the technical field of spatial audio, and the method comprises the steps: obtaining the propagation time delay from a plurality of sound sources to at least one target listening point in a target listening area; performing pulse response modeling based on each propagation time delay to obtain a prototype filter model; performing optimization solution on the prototype filter model according to a preset target response function to obtain a target filter coefficient; wherein the objective of the optimization solution is to minimize an error between a system response function of the prototype filter model after the prototype filter model is processed by a target filter coefficient and a target response function; the target filter coefficient is used for filtering the audio input signal so as to reconstruct or form a sound field in the target listening area. According to the invention, the robustness of sound field control is improved.