Device and method for digital pre-distortion
A digital predistortion and digital signal technology, applied in the direction of predistortion by compensating for memory effect, parts of amplifying devices, improving amplifiers to reduce nonlinear distortion, etc. Low cost, compensation of nonlinearity and memory effect distortion, quality improvement effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0054] An embodiment of the present invention provides a digital predistortion device, which is described by taking a Hammerstein model and an FIR filter as examples. Figure 10 It is a schematic diagram of the structure of the digital predistortion device of the embodiment of the present invention.
[0055] Such as Figure 10 As shown, the digital predistortion device 1000 includes: a digital predistorter 100 , a constant value characteristic acquirer 1003 , a cost function generator 1004 and a coefficient updater 1005 . Wherein, the digital predistorter 100 includes a nonlinear device 1001 and an FIR filter 1002 . It is worth noting that, for simplicity, Figure 10 Only some components are shown, and for other components not shown, reference may be made to the prior art.
[0056] Among them, the nonlinear device 1001 is used to compensate the nonlinear characteristics of the signal; the FIR filter 1002 is used to compensate the memory effect characteristics of the signal;...
Embodiment 2
[0126] An embodiment of the present invention provides a digital pre-distortion method, which uses a nonlinear device to compensate the nonlinear characteristics of a signal, and uses a memory effect compensator to compensate the memory effect characteristics of the signal. This embodiment of the present invention corresponds to the digital pre-distortion device described in Embodiment 1, and the same content as Embodiment 1 will not be repeated.
[0127] Figure 21 is a schematic flow chart of the digital pre-distortion method of the embodiment of the present invention, such as Figure 21 As shown, the method may include:
[0128] Step 2101, process the feedback signal to obtain the constant value characteristic information of the signal;
[0129] Step 2102, calculating the pre-distortion cost function according to the obtained constant value characteristic information and a preset value, wherein the preset value is obtained in advance according to the modulation mode of th...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More 
PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.
