Adaptive algorithm modular design method based on FPGA

Abstract

The invention discloses an adaptive algorithm modular design method based on an FPGA. The method mainly comprises three parts: (1) design of a standard parallel adaptive LMS filter and a non-standardparallel adaptive LMS filter; (2) establishment of a circuit model of the whole adaptive FxLMS system; and (3) establishment of an RTL circuit structure model under a Vivado comprehensive tool and a testbench platform of an adaptive algorithm. Compared with a traditional FxLMS algorithm, the innovation point of the method is that an Xilinx System sensor tool is added on the basis of a Simulink library, the tool is used for calling a basic adder, a multiplier and some logic unit blocks for modular design, finally HDL codes are generated, and layout wiring and time sequence simulation are carried out in combination with a Vivado comprehensive tool. According to the invention, the development period can be shortened, the modeling accuracy can be improved, good matching of resources and speedcan be achieved, the flexibility of the algorithm can be remarkably improved, the performance of the algorithm can be enhanced, and rapid order adjustment of the self-adaptive algorithm can be conveniently achieved.

Description

technical field [0001] The invention belongs to the field of digital signal processing, and in particular relates to an FPGA-based self-adaptive algorithm modular design method, in which LMS normative and non-normative circuits are studied and realized, and finally a testbench simulation test platform is built Timing simulation after circuit synthesis. Background technique [0002] With the development of economy and continuous progress of technology, Active Noise Control (ANC) has become a research hotspot in the field of vibration engineering at home and abroad. The core part of the active noise control system (ANC) is the control algorithm. The selection of the control algorithm is directly related to the final effect. There are many control algorithms, and the sound cancellation of the adaptive filter is a common method. Among them, the adaptive algorithm mainly includes FxLMS (filtered-x least mean square) algorithm, recursive least squares (RLS) and fast transverse fi...

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Problems solved by technology

[0003] At present, the research on the FxLMS algorithm is still mainly in the stage of simulation with software. Although it is meaningful to focus more on its own characteristic research and structural improvement, many of them do not consider how to realize it on specific hardware. Problems and the research on its basic LMS algorithm circuit model structure also have a lot of deficiencies, so the present invention proposes a kind of adaptive algorithm modular design method based on FPGA

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