Digital pre-distortion system and method for improving short wave intermodulation and harmonic distortion
A technology of digital pre-distortion and harmonic distortion, applied in the direction of improving amplifiers to reduce nonlinear distortion, amplifiers with semiconductor devices/discharge tubes, electrical components, etc., can solve harmonic distortion without suppression ability, single short-wave power amplifier Issues such as intermodulation distortion and inability to improve the overall performance of shortwave power amplifiers can achieve the effect of improving intermodulation and harmonic suppression, reducing harmonic suppression, and improving performance
Pending Publication Date: 2022-04-26
XIAN UNIV OF POSTS & TELECOMM
View PDF1 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The purpose of the present invention is to solve the existing digital predistortion method for improving the distortion of the shortwave power amplifier, which can only improve the intermodulation distortion of the shortwave power amplifier, has no ability to suppress harmonic distortion, and cannot improve the overall performance of the shortwave power amplifier. problem, and provides a system and method for digital pre-distortion to improve short-wave intermodulation and harmonic distortion
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0082] In order to make the purpose, advantages and features of the present invention more clear, a system and method of digital predistortion for improving short-wave intermodulation and harmonic distortion proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[0083] like figure 1 As shown, a predistortion structure in the prior art adopts a lookup table (Lookup Table, LUT) method, and the LUT searches according to a certain function of the signal amplitude or input amplitude, and then corrects and applies it to the input terminal of the power amplifier. The amplitude and phase of the signal. The predistortion system structure consists of two channels: the loop chan...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention aims to solve the problems that the existing digital pre-distortion method for improving the distortion of the short-wave power amplifier can only improve the intermodulation distortion of the short-wave power amplifier, has no suppression capability on harmonic distortion and cannot improve the overall performance of the short-wave power amplifier. The invention provides a digital pre-distortion system and a digital pre-distortion method for improving short wave intermodulation and harmonic distortion. According to the method, aiming at short-wave signal system characteristics and a short-wave power amplifier memory effect, on the basis of integrating a cross memory polynomial pre-distortion model, an FIR structure is further adopted in the model, high-order harmonic suppression in the octave of the short-wave power amplifier is carried out by utilizing low-pass filtering characteristics of the FIR structure, and meanwhile, intermodulation and harmonic suppression are improved; and pre-distortion parameter extraction is carried out with higher integrating degree, so that the performance of a digital pre-distortion system is improved.
Description
technical field [0001] The present invention relates to adaptive digital pre-distortion technology, more specifically to a system and method for digital pre-distortion simultaneously improving intermodulation distortion and harmonic distortion of short-wave power amplifiers, suitable for improving the efficiency of short-wave radio frequency power amplifiers and reducing the impact on short-wave Design requirements for filter banks cascaded at the output of the transmitter power amplifier. Background technique [0002] The frequency range of wireless electromagnetic waves between 1.6MHz and 30MHz is usually called the shortwave frequency band. Shortwave communication mainly relies on the back and forth reflection and refraction between the ionosphere and the ground for propagation. Therefore, no matter day or night, shortwave can travel far. Nowadays, with the continuous development of computer, microelectronics and wireless communication technology, breakthroughs have been ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H03F1/32H03F3/195H03F3/213
CPCH03F1/3241H03F3/195H03F3/213H03F2200/451
Inventor 任继军王兴朱鹏李瑞彪程秦秦
Owner XIAN UNIV OF POSTS & TELECOMM