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Phase upsampling method and device and computer readable storage medium

An up-sampling and computer program technology, applied in the fields of computer-readable storage media, phase up-sampling methods and devices, can solve problems such as large signal distortion, and achieve the effects of reducing signal distortion and reducing transmission power spectrum out-of-band spurs

Pending Publication Date: 2020-12-25
RDA MICROELECTRONICS BEIJING
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Problems solved by technology

[0003] The embodiment of the present invention solves the technical problem of large signal distortion when upsampling the phase signal

Method used

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  • Phase upsampling method and device and computer readable storage medium
  • Phase upsampling method and device and computer readable storage medium
  • Phase upsampling method and device and computer readable storage medium

Examples

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Embodiment Construction

[0028] refer to Figure 7 , a schematic diagram of the structure of an existing polar emission system using two-point modulation technology is given.

[0029] Such as Figure 7As shown, the transmitted signal is a complex signal. The complex signal is input to the in-phase component input terminal I and the quadrature component input terminal Q of the CORDIC module to obtain the amplitude signal AM and the phase signal PM. The amplitude signal AM passes through an AM up-sampling module, an AM digital-to-analog converter (AM DAC) and a low-pass filter (LPF), and is input to a power amplifier (PA). The phase signal PM passes through a PM upsampling module, a phase smoothing module, and a differential operation module (d / dt) to obtain a frequency modulation signal FM. The frequency modulation signal FM and carrier information are respectively input to the adder, and the adder inputs the sum value to the sigma-delta modulator (SDM), and the SDM inputs the result to the phase-lo...

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Abstract

The invention discloses a phase upsampling method and device and a computer readable storage medium. The method comprises the following steps: calculating a first difference value between a phase value of a current sampling point and a phase value of a previous sampling point; when the first difference value is greater than a preset first threshold value, determining a first polynomial model and afirst polynomial coefficient; and constructing a first polynomial according to the first polynomial model and the first polynomial coefficient, and calculating a phase value of an ascending samplingpoint between the current sampling point and the previous sampling point by adopting the first polynomial. According to the scheme, signal distortion existing when upsampling is carried out on the phase signal can be reduced, out-of-band spurious emission of the emission power spectrum is reduced, and the emission signal quality is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a phase upsampling method and device, and a computer-readable storage medium. Background technique [0002] After the polar (Polar) transmission system converts the complex signal into an amplitude signal and a phase signal, due to the non-band-limited characteristics of the phase signal, when the phase signal is processed by conventional upsampling and linear interpolation methods, the signal will be distorted, and the transmission The power spectrum deteriorates. Contents of the invention [0003] The embodiment of the present invention solves the technical problem of large signal distortion when up-sampling the phase signal. [0004] In order to solve the above technical problems, an embodiment of the present invention provides a phase upsampling method, comprising: calculating a first difference between the phase value of the current sampling point a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F7/544G06F7/575
CPCG06F7/5443G06F7/575
Inventor 栾亦夫李开罗丽云
Owner RDA MICROELECTRONICS BEIJING
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