A digitally assisted analog domain distortion suppression device and method

Abstract

The present invention relates to a digitally assisted analog domain distortion suppressing device and method, comprising a non-ideal device for outputting a distorted output signal according to an input signal, and outputting a correction signal after the device suppresses the distortion of the input signal; It is used to extract the input signal and output signal of the non-ideal device, and after aligning the delay between the input signal and the output signal to perform power normalization, extract the distortion component of the output signal; the feedback coefficient adjustment part is used to adjust the distortion component The size is the size of the distortion introduced by the non-ideal device, and the output feedback signal is sent to the input terminal to obtain the adjusted input signal. The invention effectively suppresses signal distortion caused by non-linearity and noise generated by non-ideal radio frequency devices, reduces the use of digital signal processing devices by completing distortion suppression in the analog domain, and does not require additional complicated calculations to determine the relevant models of non-ideal devices coefficient.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a digital-assisted analog domain distortion suppression device and method. Background technique [0002] Due to the non-ideality of radio frequency devices, wireless communication systems are often interfered with, resulting in performance degradation, misunderstanding, or loss of information; such interference usually takes many forms, such as nonlinear components generated by radio frequency power amplifiers, or modulus The quantization noise generated by the insufficient quantization precision of the converter may not only cause in-band distortion, but may even leak into adjacent frequency bands and interfere with other user communications. [0003] Such as figure 1 As shown, the interference generated by the non-ideal characteristics of the device may appear in the frequency band (such as noise), or it may be scattered on both sides of the frequency ba...

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Problems solved by technology

[0002] Due to the non-ideality of radio frequency devices, wireless communication systems are often interfered with, resulting in performance degradation, misunderstanding, or loss of information; such interference usually takes many forms, such as nonlinear components generated by radio frequency power amplifiers, or modulus The quantization noise generated by the insufficient quantization precision of the converter, these interferences may not only cause in-band distortion, but may even leak into adjacent frequency bands and interfere with other user communications

[0003] like figure 1 As shown, the interference generated by the non-ideal characteristics of the device may appear in the frequency band (such as noise), or it may be scattered on both sides of the frequency band (such as nonlinearity), which will cause distortion of the user signal, or affect the possible adjacent Channel users generate interference; in practical engineering applications, the maximum ACLR (adjacent channel leakage power ratio) value allowed by communication equipment is usually specified, such as -45dBc, which will place very high requirements on the performance of radio frequency devices

[0004] Therefore, in order to solve the above problems, it is necessary to suppress or eliminate the nonlinear or noise interference generated by non-ideal devices. This elimination can be performed in the analog domain or the digital domain; however, most of the current elimination methods are either complex , or the performance is not ideal; therefore, how to effectively suppress the distortion generated by radio frequency non-ideal devices in the analog domain is a problem that needs to be solved at this stage

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