Signal processing method, apparatus, device, medium, and product

By performing signal separation and modulation in the digital domain, strictly orthogonal first and second modulation signals are generated, and the first complex signal is synthesized in a digital adder. This solves the problem of radio frequency signal distortion caused by local oscillator leakage during signal processing, and achieves low local oscillator leakage, high-quality radio frequency signal output, and reduced hardware costs.

CN122160224APending Publication Date: 2026-06-05ZHONGXING LIANHUA TECH BEIJING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGXING LIANHUA TECH BEIJING CO LTD
Filing Date
2026-05-07
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In existing technologies, local oscillator leakage during signal processing leads to radio frequency signal distortion, which is difficult to effectively solve using existing technologies.

Method used

By performing signal separation and modulation in the digital domain, strictly orthogonal first and second modulation signals are generated, and the first complex signal is synthesized in a digital adder. Then, it is converted into an analog signal by a single digital-to-analog converter, thus avoiding local oscillator leakage in the physical hardware.

Benefits of technology

It achieves high-quality RF signal output with low local oscillator leakage and no image frequency interference, reduces hardware costs and avoids hardware mismatch problems, and ensures signal stability and fidelity.

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Abstract

The application provides a signal processing method, device, equipment, medium and product, and belongs to the technical field of signal processing. Data flow of a digital baseband signal is separated into a first signal and a second signal, then a first modulation signal and a second modulation signal are respectively generated by combining a first digital carrier and a second digital carrier which are strictly orthogonal through a multiplier in a digital domain, signal synthesis operation is performed by a digital adder to output a first complex signal, and finally the synthesized single data flow is sent into a single digital-to-analog converter to be converted into a first analog signal. In this process, the link which is prone to defects in the orthogonal modulation process is all transferred to the digital domain which is composed of absolute accurate 0 and 1. Since there is no physical direct current bias in the digital domain, and the digital multiplication operation eliminates the parasitic capacitance crosstalk under the high-frequency electromagnetic field, the local oscillator leakage generated when operating with the carrier is directly avoided in the data bottom logic, and the radio frequency signal distortion is avoided.
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