Time delay mismatch calibration method and device and computer readable storage medium
A calibration method and time delay technology, applied in transmitter monitoring, transmission monitoring, electrical components, etc., can solve problems such as convergence and long time calibration results, and achieve the effect of fast and convenient delay mismatch calibration
Pending Publication Date: 2021-01-08
RDA MICROELECTRONICS BEIJING
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Problems solved by technology
However, to calibrate the delay mismatch needs to add additional circuits, and it takes a long time to make the calibration results converge
Method used
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[0028] Refer to attached Figure 6 , a schematic diagram of the structure of an existing polar emission system using two-point modulation technology is given. Such as Figure 6 As 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 is input to a power amplifier (PA) through an AM digital-to-analog converter (AM DAC) and a low-pass filter (LPF). The phase signal PM passes through the differential operation module (d / dt) to obtain the frequency modulation signal FM. The frequency modulation signal FM is input to the phase-locked loop through two channels. The phase-locked loop consists of a sigma-delta modulator (SDM), a frequency divider, a phase / frequency detector (PFD), a charge pump (CP), and a loop filter ( Loop Filter) and voltage controlled oscillator ...
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The invention discloses a time delay mismatch calibration method and device and a computer readable storage medium. The method comprises the steps of: controlling a transmitter to transmit a third signal; obtaining an adjacent channel leakage ratio when the third signal is transmitted, the adjacent channel leakage ratio comprising a first adjacent channel leakage ratio of the transmitting power ofthe current channel to the radiation power leaked to the left channel, and a second adjacent channel leakage ratio of the transmitting power of the current channel to the radiation power leaked to the right channel, wherein the carrier frequency corresponding to the left channel is smaller than the carrier frequency of the current channel corresponding to the emission of the third signal, the carrier frequency of the current channel is smaller than the carrier frequency corresponding to the right channel, and the current channel is used for sending the third signal; calculating a second difference value between the first adjacent channel leakage ratio and the second adjacent channel leakage ratio, and determining a second time delay adjustment value according to the second difference value; and calibrating the time delay mismatch between the amplitude signal and the phase signal by adopting the second time delay adjustment value. According to the scheme, time delay mismatch calibration can be completed quickly and conveniently.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a delay mismatch calibration method and device, and a computer-readable storage medium. Background technique [0002] The Polar transmission system directly uses the phase-locked loop (PLL) to modulate the phase information, which has advantages in power consumption and area compared with the conventional direct quadrature frequency conversion transmission system. [0003] The polar transmission system includes a CORDIC module, and the complex signal to be sent is input to the CORDIC module to obtain a phase signal and an amplitude signal. Since the phase signal and the amplitude signal are processed by different circuits, there will be a delay mismatch between the two signals. [0004] In the prior art, for the delay mismatch between the amplitude signal and the phase signal, a feedback receiver using an independent local oscillator to provide the carrier...
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IPC IPC(8): H04W24/02H04W24/08H04B17/11H04B17/10
CPCH04W24/02H04W24/08H04B17/104H04B17/11
Inventor 栾亦夫李开罗丽云
Owner RDA MICROELECTRONICS BEIJING