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A method of saving dpd system hardware resources

A system hardware and resource technology, applied in electrical components, amplification control, components of amplification devices, etc., can solve problems such as occupying DPD system hardware resources, complex QR decomposition or SVD decomposition, and increasing solution complexity, etc. Operation efficiency, shortening algorithm operation time, avoiding the effect of matrix inversion operation

Active Publication Date: 2022-05-17
福州智程信息科技有限公司
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Problems solved by technology

[0022] U is a matrix with K Q rows and n columns. When the sampling volume is large, the number of columns of the U matrix will be much larger than K Q (that is, n>>K Q), and QR decomposition or SVD decomposition will be more efficient. complex, which increases the complexity of solving equation (3) to a certain extent, and will also occupy a large amount of DPD system hardware resources

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  • A method of saving dpd system hardware resources
  • A method of saving dpd system hardware resources
  • A method of saving dpd system hardware resources

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Embodiment Construction

[0093] Such as figure 1 with 2 As shown, a method for saving DPD system hardware resources specifically includes the following steps:

[0094] Step 10, collecting the input signal of the power amplifier and the feedback signal output by the power amplifier;

[0095] Step 20, the input signal and the feedback signal estimate an integer delay by the following formula, so that the input signal and the feedback signal are aligned to a sampling clock offset, and the coarse synchronization of the input signal and the feedback signal is completed:

[0096]

[0097] Among them, D is the estimated delay; N is the number of sampling points of the signal; Di is the search length, for some search window length W, there is D i ∈[0,W-l]; n is the correlation length; x(n) and y 0 (n) represent input signal and feedback signal respectively, y* 0 (n) is the conjugate of the feedback signal;

[0098] Step 30, calculate the phase adjustment factor by the following formula to complete the...

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Abstract

The invention provides a method for saving the hardware resources of the DPD system. The invention multiplies the transpose conjugate of the matrix U or the transpose of the matrix U on both sides of the non-homogeneous linear equation group, and converts the matrix operation of the equation group into a square matrix operation. , and finally use the Gaussian elimination method to solve the DPD pre-distortion parameters, which skillfully avoids the matrix inversion operation and saves the hardware resources of the DPD system; optimizes the matrix U structure in the DPD algorithm, shortens the algorithm operation time by 80%, and greatly improves It improves the operating efficiency of the algorithm and saves the hardware resources of the DPD system at the same time.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for saving hardware resources of a DPD system. Background technique [0002] The nonlinear characteristics of a power amplifier (Power Amplifier, PA) will have a great impact on its work efficiency, and at the same time, with the rapid increase of high data rate and multimedia service requirements, higher requirements are placed on the linearity of the power amplifier. Therefore, in order to obtain a power amplifier with high efficiency and high linearity, it is extremely necessary to perform high linearization on the power amplifier. [0003] At present, Digital Pre-distortion (Digital Pre-distortion, DPD) has been proved to be one of the fastest-growing and most effective methods for compensating the nonlinearity of power amplifiers. That is, a nonlinear module reciprocal to the nonlinear characteristics of the power amplifier is added before the power amplifier ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F3/21H03G3/30
CPCH03F1/3247H03F3/21H03G3/30
Inventor 本杰明.K.许刘聪江蓝锦龙
Owner 福州智程信息科技有限公司