A multi-channel down-conversion method, device and storage medium based on model design

Abstract

The invention discloses a multi-channel down-conversion method, device and storage medium based on model design. The data acquisition model designed at the system level converts intermediate frequency signals in different time domains into intermediate frequency signals in the simultaneous domain through the intermediate frequency signal cross-clock processing module, and analyzes the control parameters and filter coefficients sent by the host computer through the BRAM module to obtain DDS Mixing module control word and cascaded filter bank parameters, according to the DDS mixing module control word to control the DDS mixing module to generate an intermediate frequency local carrier, generate an intermediate frequency baseband signal with the simultaneous domain intermediate frequency signal, and use the intermediate frequency baseband signal and cascaded filter bank The parameters are filtered as input in a cascaded filter bank to obtain a downsampled baseband signal. The technical scheme of the invention can simultaneously process multiple signals in multiple channels, greatly simplifies the complexity of the system, improves the efficiency of down-conversion processing, and improves the reliability and application range of the system.

Description

technical field [0001] The invention relates to the field of software radio, in particular to a model-based design multi-channel down-conversion method, device and storage medium. Background technique [0002] At present, with the rapid development of fields such as satellite communication and radar detection, digital down-conversion is one of the key technologies of the software radio system. Digital down-conversion technology is widely used in satellite communications, navigation simulators, radar and other fields. Using digital down-conversion can move the radio frequency baseband data to zero frequency, and then perform encoding and decoding, modulation and demodulation and filtering of the signal. The amount of data is increasing, so the quality of the down-converter in the communication system directly affects the overall performance of the product, and the down-converter has become the focus and difficulty of communication system design. At present, most of the most ...

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Problems solved by technology

At present, most of the most common down-converters are in single-channel mode. When processing multiple signals at the same time, multiple down-converters need to be set up, resulting in a larger communication system and a more complicated design, resulting in high cost and low reliability. poor

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