Transmitting device and stray control method

Abstract

The invention discloses a transmitting device and a stray control method. The transmitting device comprises a digital baseband processing module, an analog front-end processing module, an analog rear-end processing module and a control module, the control module is connected with the digital baseband processing module, the analog front-end processing module and the analog rear-end processing module; the analog front-end processing module is connected with the digital baseband processing module and the analog rear-end processing module; based on a control instruction generated by the control module, a baseband signal realizes flexible and adjustable intermediate frequency conversion path reconstruction spectrum characteristics through the digital baseband processing module, the analog front-end processing module adjusts sampling noise and far-end stray suppression capability, and the analog rear-end processing module adjusts radio frequency and power parameters in real time. The integer boundary spurious frequency is dynamically shifted to the non-sensitive frequency band, and the integer boundary spurious power is reduced.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a transmitting device and a spurious control method. Background Art

[0002] In conventional launch devices, such as Figure 1 As shown, the phase-locked loop (PLL) is the core module for generating the local oscillator signal. Traditional fractional-N phase-locked loops (PLLs) achieve fine frequency control by modulating the division ratio. However, this periodic modulation of the division ratio can lead to integer boundary spurs (IBS). The closer the IBS spurs are to integer multiples of the reference clock frequency, the greater their power. Conversely, the further they deviate from integer multiples of the reference clock frequency, the smaller their power. These spurs are located near the carrier frequency and may fall into adjacent channels of transmitters or the frequency band of receivers, causing interference and violating EMC standards.

[0003] In traditional transmitter architectures, the integer boundary spurs (IBS) of the phase-locked loop (PLL) are fixed and cannot be dynamically adjusted, resulting in limited EMC performance in specific frequency bands. In existing technologies, the suppression of integer boundary spurs in the PLL mainly relies on the following methods: 1) Analog filtering: Adding a high-order filter to the output of the phase-locked loop will increase system size and power consumption. 2) Digital calibration: Optimize linearity through a time-to-digital converter (TDC) and digital compensation algorithms, but this requires a complex calibration process and increases the digital circuit area; 3) Random modulation: Introducing a random sequence to disperse stray energy, but may worsen phase noise; However, none of the above spurious suppression methods can achieve active avoidance of spurious emissions from the system architecture level, and it is difficult to strike a balance between flexibility, cost, and performance. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention aims to provide a transmitting device and a spurious control method, which can dynamically change the spurious frequency distribution and achieve active avoidance of spurious emissions from the transmitting device.

[0005] In order to solve the above problems, the present invention is implemented according to the following scheme: Provided is a transmitting device, comprising: a digital baseband processing module, an analog front-end processing module, an analog back-end processing module, and a control module; the control module is connected to the digital baseband processing module, the analog front-end processing module, and the analog back-end processing module; the analog front-end processing module is connected to the digital baseband processing module and the analog back-end processing module; The control module generates a control instruction according to the parameters to be controlled of the simulation back-end processing module; The digital baseband processing module determines the frequency of the intermediate frequency digital signal converted from the baseband signal according to the control instruction; the baseband signal is the input signal of the transmitting device; The analog front-end processing module determines the suppression capability of sampling noise and far-end spurious when converting the intermediate frequency digital signal into an intermediate frequency analog signal according to the control instruction; The analog backend processing module adjusts the parameters to be controlled according to the control instruction and determines the frequency and power of the radio frequency signal converted from the intermediate frequency analog signal; the radio frequency signal is the output signal of the transmitting device.

[0006] Compared with the prior art, the beneficial effects of a transmitting device of the present invention are as follows: the control module realizes the coordinated control of the digital baseband processing module, the analog front-end processing module and the analog back-end processing module, thereby realizing system-level dynamic spurious avoidance. Based on the control instructions generated by the control module, the baseband signal reconstructs the spectrum characteristics through the flexible and adjustable intermediate frequency conversion path through the digital baseband processing module, the analog front-end processing module adjusts the suppression capability of sampling noise and far-end spurious, and the analog back-end processing module adjusts the RF frequency and power parameters in real time, so that the integer boundary spurious frequency is dynamically offset to the non-sensitive frequency band, thereby reducing the integer boundary spurious power.

[0007] Optionally, the digital baseband processing module includes an interpolation filter and a digital up-converter; the digital up-converter is connected to the interpolation filter, the analog front-end processing module, and the control module.

[0008] Optionally, the digital up-converter includes a switching switch, a frequency converter and a digital local oscillator module; the frequency converter is connected to the interpolation filter, the analog front-end processing module, the switching switch and the digital local oscillator module; and the digital local oscillator module is connected to the control module.

[0009] Optionally, the analog front-end processing module includes a digital-to-analog converter and an analog filter; the digital-to-analog converter is connected to the frequency converter and the analog filter; the analog filter is connected to the analog back-end processing module and the control module.

[0010] Optionally, the analog back-end processing module includes a radio frequency up-converter, a pre-amplifier and a fractional-frequency phase-locked loop; the radio frequency up-converter is connected to the analog filter, the pre-amplifier and the fractional-frequency phase-locked loop; the fractional-frequency phase-locked loop is connected to the control module.

[0011] Optionally, the fractional-frequency phase-locked loop includes a phase frequency detector, a charge pump, a loop filter, a voltage-controlled oscillator, a feedback divider and a divide-by-two divider; the phase frequency detector is connected to the divide-by-two divider through the charge pump, the loop filter and the voltage-controlled oscillator in sequence; the feedback divider is connected to the phase frequency detector and the voltage-controlled oscillator.

[0012] A spurious emission control method is also provided, which is applied to the transmitting device, and includes: The control module generates a control instruction for controlling the spurious emission of the transmitting device according to the control parameters to be controlled of the simulation back-end processing module; The digital baseband processing module switches the working mode of the digital baseband processing module according to the control instruction, and determines the frequency of the intermediate frequency digital signal converted from the baseband signal according to the working mode, wherein the baseband signal is the input signal of the transmitting device; The analog front-end processing module adjusts the signal transmission parameters of the analog front-end processing module according to the control instruction, wherein the signal transmission parameters are used to indicate the suppression capability of sampling noise and far-end spurious when the intermediate frequency digital signal is converted into an intermediate frequency analog signal; The analog back-end processing module adjusts the parameters to be controlled of the analog back-end processing module according to the control instruction, and determines the frequency and power of the radio frequency signal converted from the intermediate frequency analog signal according to the parameters to be controlled. The radio frequency signal is the output signal of the transmitting device.

[0013] Optionally, the control instruction includes a first control instruction and a second control instruction; The control module generates control instructions based on the parameters to be controlled by the simulation backend processing module, including: Determining a deviation parameter according to the parameter to be controlled; When the deviation parameter is greater than a preset target value, generating a first control instruction for controlling the transmitting device to operate in a direct up-conversion mode; When the deviation parameter is less than or equal to a preset target value, a second control instruction is generated for controlling the transmitting device to operate in a secondary up-conversion mode.

[0014] Optionally, the signal transmission parameter includes the bandwidth of the analog filter in the analog front-end processing module; the parameter to be controlled includes the frequency division ratio of the fractional frequency phase-locked loop in the analog back-end processing module; When the control instruction is a first control instruction, the digital baseband processing module switches the working mode of the digital up converter in the digital baseband processing module to a bypass mode according to the first control instruction, and the frequency of the intermediate frequency digital signal is the same as the frequency of the baseband signal; The analog front-end processing module adjusts the bandwidth of the analog filter to be greater than the frequency of the baseband signal according to the first control instruction; the bandwidth is used to indicate the suppression capability of the intermediate frequency analog signal sampling noise and far-end spurious; The analog back-end processing module determines a target frequency division ratio based on the first control instruction, a reference signal received by the fractional frequency phase-locked loop, and a local oscillator frequency output by the fractional frequency phase-locked loop, and adjusts the frequency division ratio of the fractional frequency phase-locked loop to the target frequency division ratio.

[0015] Optionally, the signal transmission parameter includes the bandwidth of the analog filter in the analog front-end processing module; the parameter to be controlled includes the frequency division ratio of the fractional frequency phase-locked loop in the analog back-end processing module; When the control instruction is a second control instruction, the digital baseband processing module switches the working mode of the digital up converter in the digital baseband processing module to the up-conversion mode according to the second control instruction, and the frequency converter of the digital up converter determines the frequency of the intermediate frequency digital signal according to the digital local oscillator frequency output by the digital local oscillator module and the baseband signal; The analog front-end processing module adjusts the bandwidth of the analog filter to be greater than the frequency of the intermediate frequency digital signal according to the second control instruction; the bandwidth is used to indicate the suppression capability of the intermediate frequency analog signal sampling noise and far-end spurious; The analog back-end processing module determines a target frequency division ratio based on the second control instruction, the digital local oscillator frequency, the reference signal received by the fractional-frequency phase-locked loop, and the local oscillator frequency output by the fractional-frequency phase-locked loop, and adjusts the frequency division ratio of the fractional-frequency phase-locked loop to the target frequency division ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram of the traditional launch device architecture; Figure 2 The transmitting device architecture of the present invention Figure 1 ; Figure 3 The transmitting device architecture of the present invention Figure 2 ; Figure 4 Flowchart of the spurious control method of the present invention.

[0017] Explanation of the reference numerals: 1. digital baseband processing module; 101. interpolation filter; 102. digital up-converter; 1021. switching switch; 1022. frequency converter; 1023. digital local oscillator module; 2. analog front-end processing module; 201. digital-to-analog converter; 202. analog filter; 3. analog back-end processing module; 301. RF up-converter; 302. pre-amplifier; 303. fractional-frequency phase-locked loop; 3031. frequency detector; 3032. charge pump; 3033. loop filter; 3034. voltage-controlled oscillator; 3035. feedback divider; 3036. divide-by-two divider; 4. control module. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0019] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0020] See also Figure 2 As shown, a transmitting device of the present invention includes: a digital baseband processing module 1, an analog front-end processing module 2, an analog back-end processing module 3 and a control module 4; the control module 4 is connected to the digital baseband processing module 1, the analog front-end processing module 2, and the analog back-end processing module 3; the analog front-end processing module 2 is connected to the digital baseband processing module 1 and the analog back-end processing module 3.

[0021] The control module 4 generates a control instruction based on the parameters to be controlled of the analog back-end processing module 3; the digital baseband processing module 1 determines the frequency of the intermediate frequency digital signal converted into the baseband signal according to the control instruction; the baseband signal is the input signal of the transmitting device; the analog front-end processing module 2 determines the sampling noise and far-end spurious suppression capability of the intermediate frequency digital signal converted into the intermediate frequency analog signal according to the control instruction; the analog back-end processing module 3 adjusts the parameters to be controlled according to the control instruction and determines the frequency and power of the radio frequency signal converted into the intermediate frequency analog signal; the radio frequency signal is the output signal of the transmitting device.

[0022] See also Figure 3As shown, the digital baseband processing module 1 includes an interpolation filter 101 and a digital up converter 102; the digital up converter 102 is connected to the interpolation filter 101, the analog front-end processing module 2, and the control module 4; the digital up converter 102 includes a switching switch 1021, a frequency converter 1022, and a digital local oscillator module 1023; the frequency converter 1022 is connected to the interpolation filter 101, the analog front-end processing module 2, the switching switch 1021, and the digital local oscillator module 1023; the digital local oscillator module 1023 is connected to the control module 4; wherein, in one embodiment of the present invention, compared with the traditional digital up converter, the digital up converter 102 is an optional digital up converter 102, and its operating mode is controlled by the control instruction generated by the control module 4.

[0023] The interpolation filter 101 is used to receive the baseband signal fbb, which is increased from a lower sampling frequency fs / N to a sampling frequency fs that meets the requirements of subsequent processing, and to filter out some image frequencies generated by the sampling process. The digital up-converter 102 operates in up-conversion mode and bypass mode. The digital local oscillator module 1023 is used to generate a digital local oscillator frequency fdlo. When the switch 1021 is open, the digital up-converter 102 operates in up-conversion mode. At this time, the frequency converter 1022 operates and converts the interpolated baseband signal frequency from fbb to an intermediate frequency digital signal fif of a digital intermediate frequency frequency, that is, the intermediate frequency digital signal fif = fbb + fdlo. When the switch 1021 is closed, the digital up-converter 102 operates in bypass mode. At this time, the frequency converter 1022 does not operate, that is, the intermediate frequency digital signal fif = fbb. The operating mode of the digital up-converter 102 is controlled by the control instruction generated by the control module 4.

[0024] The analog front-end processing module 2 includes a digital-to-analog converter 201 and an analog filter 202; the digital-to-analog converter 201 is connected to the frequency converter 1022 and the analog filter 202; the analog filter 202 is connected to the analog back-end processing module 3 and the control module 4; wherein, in one embodiment of the present invention, the analog filter 202 is a programmable analog filter 202 compared to a traditional analog filter, and its bandwidth is controlled by a control instruction generated by the control module 4.

[0025] The digital-to-analog converter 201 is used to convert the intermediate frequency digital signal fif into an intermediate frequency analog signal, that is, the intermediate frequency analog signal is also fif; the analog filter 202 is used to filter out the sampling noise and far-end spurs generated by the digital-to-analog converter 201, that is, to determine the ability of the analog filter 202 to suppress the sampling noise and far-end spurs of the intermediate frequency analog signal fif; the ability of the analog filter 202 to filter out the sampling noise and far-end spurs determines the ability of the analog filter 202 to suppress the sampling noise and far-end spurs of the intermediate frequency signal fif; the bandwidth BW of the analog filter 202 is used to indicate the frequency bandwidth occupied by the intermediate frequency analog signal fif output by the digital-to-analog converter 201, that is, the filtering ability of the analog filter 202 is determined by the bandwidth BW, and the bandwidth BW is controlled by the control instruction generated by the control module 4.

[0026] The analog back-end processing module 3 includes a radio frequency up-converter 301, a pre-amplifier 302 and a fractional frequency phase-locked loop 303; the radio frequency up-converter 301 is connected to the analog filter 202, the pre-amplifier 302 and the fractional frequency phase-locked loop 303; the fractional frequency phase-locked loop 303 is connected to the control module 4; the fractional frequency phase-locked loop 303 includes a frequency detector 3031, a charge pump 3032, a loop filter 3033, a voltage-controlled oscillator 3034, a feedback divider 3035 and a divide-by-two divider 3036; the frequency detector 3031 is connected to the divide-by-two divider 3036 via the charge pump 3032, the loop filter 3033 and the voltage-controlled oscillator 3034 in sequence; the feedback divider 3035 is connected to the frequency detector 3031 and the voltage-controlled oscillator 3034.

[0027] The RF up-converter 301 is used to convert the intermediate frequency analog signal fif output by the analog filter 202 into a radio frequency signal frf of a radio frequency that meets the transmission requirements, that is, frf=fif+flo, where the signal flo is the local oscillator signal output by the fractional frequency phase-locked loop 303; when the digital baseband processing module 1 operates in the up-conversion mode, the intermediate frequency analog signal fif=fbb+fdlo is substituted, that is, the radio frequency signal frf=fbb+fdlo+flo; when the digital baseband processing module 1 operates in the upper bypass mode, the intermediate frequency analog signal fif=fbb is substituted, that is, the radio frequency signal frf=fbb+fl o; the preamplifier 302 is used to power amplify the RF signal output by the RF up-converter 301 and drive the off-chip load to output a RF signal with a frequency and power that meets the transmitter requirements; the division ratio N of the fractional-frequency phase-locked loop 303 can be a fractional number, and the output frequency of the voltage-controlled oscillator 3034 can be a non-integer multiple of the reference frequency signal fref. The reference frequency signal fref is the reference signal received by the frequency detector 3031 to provide higher frequency resolution and more accurately control the output of the local oscillator signal flo of the fractional-frequency phase-locked loop 303, and the local oscillator signal flo=fref*N / 2.

[0028] Integer boundary spurs (IBS) are common spurious signals in the fractional-N PLL 303. They primarily appear when the division ratio N approaches an integer, particularly when the fractional portion of the division ratio N approaches 0 or 1. The closer the fractional portion of the division ratio N approaches 0 or 1, the smaller the spurious frequency fibs of the IBS and the larger the spurious power of the IBS. Conversely, the further the fractional portion of the division ratio N deviates from 0 or 1, the larger the spurious frequency fibs of the IBS and the smaller the spurious power of the IBS.

[0029] The control module 4 controls the frequency configuration of the transmitter, specifically by controlling the original fractional frequency phase-locked loop 303 to achieve two working modes: 1) When the division ratio N of the fractional-frequency phase-locked loop 303 deviates from an integer by more than a preset target value, for example, the preset target value is 0.05, that is, when the fractional part of the division ratio N is greater than 0.05 and less than 0.95, the integer boundary spurious IBS is not obvious, and in this case, no electromagnetic compatibility problem will occur in the output spurious of the transmitter. By controlling the switch 1021 to be closed, the digital up-converter 102 is configured to operate in the bypass mode, that is, the intermediate frequency digital signal fif=fbb, the transmitter operates in the direct conversion mode, and the radio frequency signal ffr=fbb+flo. At this time, the division ratio N of the fractional-frequency phase-locked loop 303 is adjusted to N=2*flo / fref; 2) When the division ratio N of the fractional frequency phase-locked loop 303 deviates from the integer value and is not greater than (less than or equal to) the preset target value, for example, the preset target value is 0.05, that is, when the fractional part of the division ratio N is less than or equal to 0.05 and greater than or equal to 0.95, the integer boundary spurious IBS becomes significantly larger, which may cause electromagnetic compatibility problems in the output spurious of the transmitter. By controlling the switch 1021 to be turned on, the digital up-converter 102 is configured to work in the up-conversion mode, that is, the intermediate frequency digital signal fif=fbb+fdlo, and the analog The bandwidth BW of the pseudo filter 202 is expanded to be greater than fbb + fdlo. The transmitter operates in a double-conversion mode, and the RF signal frr = fbb + fdlo + flo. At this time, the division ratio N of the fractional-number frequency-locked loop 303 is adjusted to N = 2*(flo - fdlo) / fref. By changing the local oscillator signal flo of the RF up-converter 301 and the corresponding fractional value of the division ratio N, the frequency of the integer boundary spurs IBS is changed, thereby achieving the purpose of reducing the integer boundary spurs IBS output by the transmitter.

[0030] The present invention also provides a spurious control method, which is applied to the above-mentioned transmitting device and includes: S1: The control module 4 generates a control instruction for controlling spurious emissions of the transmitting device based on the parameters to be controlled of the analog backend processing module 3; wherein the parameters to be controlled include the frequency division ratio N of the fractional-frequency phase-locked loop 303 in the analog backend processing module 3, and the control instruction includes a first control instruction and a second control instruction; the control module 4 generates the control instruction based on the parameters to be controlled of the analog backend processing module 3, including: According to the parameter to be controlled, a deviation parameter is determined, specifically, the fractional part of the division ratio N of the fractional frequency phase-locked loop 303 is determined as the deviation parameter; when the deviation parameter is greater than a preset target value, a first control instruction is generated for controlling the transmitting device to operate in a direct up-conversion mode, for example, when the preset target value is 0.05, that is, when the deviation parameter (the fractional part of the division ratio N) is greater than 0.05 and less than 0.95, the first control instruction is generated; when the deviation parameter is less than or equal to the preset target value, a second control instruction is generated for controlling the transmitting device to operate in a secondary up-conversion mode, for example, when the preset target value is 0.05, that is, when the fractional part of the division ratio N is less than or equal to 0.05 and greater than or equal to 0.95, the second control instruction is generated.

[0031] S2: The digital baseband processing module 1 switches the working mode of the digital baseband processing module 1 according to the control instruction, and determines the frequency of the baseband signal fbb converted into the intermediate frequency digital signal fif according to the working mode, and the baseband signal fbb is the input signal of the transmitting device; wherein the working mode of the digital baseband processing module 1 includes an up-conversion mode and a bypass mode; when the working mode of the digital baseband processing module 1 is the up-conversion mode, the frequency converter 1022 of the digital up-converter 102 in the digital baseband processing module 1 works, and the frequency converter 1022 is based on the digital local oscillation mode of the digital up-converter 102. The digital local oscillator frequency fdlo generated by block 1023 converts the baseband signal fbb into an intermediate frequency digital signal fif, and the intermediate frequency digital signal fif=fbb+fdlo; when the working mode of the digital baseband processing module 1 is the bypass mode, the frequency converter 1022 of the digital up converter 102 in the digital baseband processing module 1 does not work, and the frequency converter 1022 will not convert the baseband signal fbb into an intermediate frequency digital signal fif according to the digital local oscillator frequency fdlo generated by the digital local oscillator module 1023 of the digital up converter 102, and at this time the intermediate frequency digital signal fif=fbb. S3: The analog front-end processing module 2 adjusts the signal transmission parameters of the analog front-end processing module 2 according to the control instruction. The signal transmission parameters are used to indicate the ability to suppress sampling noise and far-end spurs when converting the intermediate frequency digital signal fif into the intermediate frequency analog signal fif. The signal transmission parameters include the bandwidth BW of the analog filter 202 in the analog front-end processing module 2. The analog filter 202 is used to filter out the sampling noise and far-end spurs generated by the digital-to-analog converter 201, that is, to determine the ability to suppress the sampling noise and far-end spurs of the intermediate frequency analog signal fif. The ability of the analog filter 202 to filter out the sampling noise and far-end spurs determines the ability to suppress the sampling noise and far-end spurs of the intermediate frequency signal fif. The bandwidth BW of the analog filter 202 is used to indicate the frequency bandwidth occupied by the intermediate frequency analog signal fif output by the digital-to-analog converter 201. That is, the filtering ability of the analog filter 202 is determined by the bandwidth BW, and the bandwidth BW is controlled by the control instruction generated by the control module 4.

[0032] S4: The analog backend processing module 3 adjusts the parameters to be controlled of the analog backend processing module 3 according to the control instruction, and determines the frequency and power of the radio frequency signal converted from the intermediate frequency analog signal according to the parameters to be controlled. The radio frequency signal is the output signal of the transmitting device.

[0033] The RF up-converter 301 in the analog back-end processing module 3 is used to convert the intermediate frequency analog signal fif output by the analog filter 202 into a radio frequency signal frf of a radio frequency that meets the transmission requirements, that is: frf=fif+flo; when the digital baseband processing module 1 works in the up-conversion mode, the intermediate frequency analog signal fif=fbb+fdlo is substituted, that is, the radio frequency signal frf=fbb+fdlo+flo; when the digital baseband processing module 1 works in the upper bypass mode, the intermediate frequency analog signal fif=fbb is substituted, that is, the radio frequency signal frf=fbb+flo.

[0034] Integer boundary spurs (IBS) are common spurious signals in the fractional-N PLL 303. They primarily appear when the division ratio N approaches an integer, particularly when the fractional portion of the division ratio N approaches 0 or 1. The closer the fractional portion of the division ratio N approaches 0 or 1, the smaller the spurious frequency fibs of the IBS and the larger the spurious power of the IBS. Conversely, the further the fractional portion of the division ratio N deviates from 0 or 1, the larger the spurious frequency fibs of the IBS and the smaller the spurious power of the IBS.

[0035] In one embodiment of the present invention, each time the transmitting device adjusts the frequency of the radio frequency signal, it performs a working frequency configuration process to adjust the frequency of the radio frequency signal according to the frequency of the transmitting device. Figure 4 The process shown controls the integer boundary spurs (IBS) of the transmitter, as follows: 1) Configure the transmitter to obtain the local oscillator signal flo required for direct up-conversion based on the RF signal frf output by the transmitter; 2) Calculating the frequency division ratio N of the fractional-frequency phase-locked loop 303 based on the reference frequency signal fref and the local oscillator signal flo, where N=2*flo / fref; 3) Whether the division ratio N deviates from the integer value by more than the preset target value, that is, whether the deviation parameter exceeds the preset target value; 4) If it exceeds the preset target value, the integer boundary spurious frequency fibs is large and the spurious power of the integer boundary spurious IBS is low. At this time, the control instruction is the first control instruction, and the transmitter operates in the direct up-conversion mode.

[0036] When the control instruction is the first control instruction, the digital baseband processing module 1 switches the operating mode of the digital up-converter 102 in the digital baseband processing module 1 to the bypass mode according to the first control instruction. Specifically, the switching switch 1021 is controlled to be closed so that the frequency of the intermediate frequency digital signal fif is the same as the frequency of the baseband signal fbb (fif=fbb). The analog front-end processing module 2 adjusts the bandwidth BW of the analog filter 202 to be greater than the frequency of the baseband signal fbb according to the first control instruction. The bandwidth BW is used to indicate the ability to suppress sampling noise and far-end spurious signals of the intermediate frequency analog signal fif. The analog back-end processing module 3 determines the target frequency division ratio N' according to the first control instruction based on the reference signal fbb received by the fractional-frequency phase-locked loop 303 and the local oscillator frequency flo output by the fractional-frequency phase-locked loop 303, and adjusts the frequency division ratio N of the fractional-frequency phase-locked loop 303 to the target frequency division ratio N'.

[0037] The first control instruction sets the digital baseband processing module 1, the analog front-end processing module 2, and the analog back-end processing module 3 as follows: ① The working mode of the digital up-converter 102 is set to bypass mode; ② The bandwidth BW of the analog filter 202 is greater than the baseband signal fbb; ③ The frequency division ratio N of the fractional frequency phase-locked loop 303 is set to the target frequency division ratio N', where N'=2*flo / fref.

[0038] 5) If the preset target value is not exceeded, the integer boundary spurious frequency fibs is small and the spurious power of the integer boundary spurious IBS is high. At this time, the control instruction is the second control instruction, and the transmitter operates in the secondary up-conversion mode.

[0039] When the control instruction is the second control instruction, the digital baseband processing module 1 switches the working mode of the digital up converter 102 in the digital baseband processing module 1 to the up-conversion mode according to the second control instruction, specifically, the control switch 1021 is turned on, and the frequency converter 1022 of the digital up converter 102 determines the frequency of the intermediate frequency digital signal fif according to the digital local oscillator frequency fdlo and the baseband signal fbb output by the digital local oscillator module 1023, and the intermediate frequency digital signal fif=fbb+fdlo; the analog front-end processing module ... second control instruction. The second control instruction adjusts the bandwidth BW of the analog filter 202 to be greater than the frequency of the intermediate frequency digital signal fif; the bandwidth BW is used to indicate the suppression capability of the intermediate frequency analog signal fif sampling noise and far-end spurious; the analog back-end processing module 3 determines the target frequency division ratio N' according to the second control instruction based on the digital local oscillator frequency fdlo, the reference signal fref received by the fractional-frequency phase-locked loop 303 and the local oscillator frequency flo output by the fractional-frequency phase-locked loop 303, and adjusts the frequency division ratio N of the fractional-frequency phase-locked loop 303 to the target frequency division ratio N'.

[0040] The second control instruction sets the digital baseband processing module 1, the analog front-end processing module 2, and the analog back-end processing module 3 as follows: ① The working mode of the digital up-converter 102 is set to the up-conversion mode; ② The bandwidth BW of the analog filter 202 is greater than the intermediate frequency digital signal fif=fbb+fdlo; ③ The frequency division ratio N of the fractional frequency phase-locked loop 303 is set to the target frequency division ratio N', where N'=2*(flo-fdlo) / fref.

[0041] 6) Complete the frequency setting of the transmitter and enter normal working state.

[0042] The frequency fibs of the integer boundary spur (IBS) is the product of the minimum deviation of the frequency division ratio N from an integer and the reference frequency signal fref of the fractional-number phase-locked loop 303 (the reference signal received by the frequency detector 3031). The allowable deviation of the frequency division ratio N from an integer by a preset target value and the local oscillator frequency fdlo of the digital up-converter 102 can be determined during implementation based on the magnitude and requirements of the integer boundary spurs. Table 1 is provided to illustrate the spurious control method provided by the present invention for a transmitter, which prevents fibs from being too small, thereby reducing the spurious power of the transmitter IBS.

[0043] Table 1

[0044] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A launching device, characterized in that: include: A digital baseband processing module, an analog front-end processing module, an analog back-end processing module, and a control module; the control module is connected to the digital baseband processing module, the analog front-end processing module, and the analog back-end processing module; the analog front-end processing module is connected to the digital baseband processing module and the analog back-end processing module; The control module generates a control instruction according to the parameters to be controlled of the simulation back-end processing module; The digital baseband processing module determines the frequency of the intermediate frequency digital signal converted from the baseband signal according to the control instruction; the baseband signal is the input signal of the transmitting device; The analog front-end processing module determines the suppression capability of sampling noise and far-end spurious when converting the intermediate frequency digital signal into an intermediate frequency analog signal according to the control instruction; The analog backend processing module adjusts the parameters to be controlled according to the control instruction and determines the frequency and power of the radio frequency signal converted from the intermediate frequency analog signal; the radio frequency signal is the output signal of the transmitting device.

2. A launching device according to claim 1, characterized in that: The digital baseband processing module includes an interpolation filter and a digital up-converter; the digital up-converter is connected to the interpolation filter, the analog front-end processing module, and the control module.

3. A launching device according to claim 2, characterized in that: The digital up-converter includes a switching switch, a frequency converter and a digital local oscillator module; the frequency converter is connected to the interpolation filter, the analog front-end processing module, the switching switch and the digital local oscillator module; the digital local oscillator module is connected to the control module.

4. A launching device according to claim 3, characterized in that: The analog front-end processing module includes a digital-to-analog converter and an analog filter; the digital-to-analog converter is connected to the frequency converter and the analog filter; the analog filter is connected to the analog back-end processing module and the control module.

5. A launching device according to claim 4, characterized in that: The analog back-end processing module includes a radio frequency up-converter, a pre-amplifier and a fractional frequency phase-locked loop; the radio frequency up-converter is connected to the analog filter, the pre-amplifier and the fractional frequency phase-locked loop; the fractional frequency phase-locked loop is connected to the control module.

6. A launching device according to claim 5, characterized in that: The fractional-frequency phase-locked loop includes a phase frequency detector, a charge pump, a loop filter, a voltage-controlled oscillator, a feedback frequency divider and a divide-by-two frequency divider; the phase frequency detector is connected to the divide-by-two frequency divider through the charge pump, the loop filter and the voltage-controlled oscillator in sequence; the feedback frequency divider is connected to the phase frequency detector and the voltage-controlled oscillator.

7. A spurious control method, applied to a transmitting device according to claims 1 to 6, characterized in that: include: The control module generates a control instruction for controlling the spurious emission of the transmitting device according to the control parameters to be controlled of the simulation back-end processing module; The digital baseband processing module switches the working mode of the digital baseband processing module according to the control instruction, and determines the frequency of the intermediate frequency digital signal converted from the baseband signal according to the working mode, wherein the baseband signal is the input signal of the transmitting device; The analog front-end processing module adjusts the signal transmission parameters of the analog front-end processing module according to the control instruction, wherein the signal transmission parameters are used to indicate the suppression capability of sampling noise and far-end spurious when the intermediate frequency digital signal is converted into an intermediate frequency analog signal; The analog back-end processing module adjusts the parameters to be controlled of the analog back-end processing module according to the control instruction, and determines the frequency and power of the radio frequency signal converted from the intermediate frequency analog signal according to the parameters to be controlled. The radio frequency signal is the output signal of the transmitting device.

8. The spurious control method according to claim 7, characterized in that: The control instruction includes a first control instruction and a second control instruction; The control module generates control instructions based on the parameters to be controlled by the simulation backend processing module, including: Determining a deviation parameter according to the parameter to be controlled; When the deviation parameter is greater than a preset target value, generating a first control instruction for controlling the transmitting device to operate in a direct up-conversion mode; When the deviation parameter is less than or equal to a preset target value, a second control instruction is generated for controlling the transmitting device to operate in a secondary up-conversion mode.

9. The spurious control method according to claim 8, characterized in that: The signal transmission parameter includes the bandwidth of the analog filter in the analog front-end processing module; the parameter to be controlled includes the frequency division ratio of the fractional frequency phase-locked loop in the analog back-end processing module; When the control instruction is a first control instruction, the digital baseband processing module switches the working mode of the digital up converter in the digital baseband processing module to a bypass mode according to the first control instruction, and the frequency of the intermediate frequency digital signal is the same as the frequency of the baseband signal; The analog front-end processing module adjusts the bandwidth of the analog filter to be greater than the frequency of the baseband signal according to the first control instruction; the bandwidth is used to indicate the suppression capability of the intermediate frequency analog signal sampling noise and far-end spurious; The analog back-end processing module determines a target frequency division ratio based on the first control instruction, a reference signal received by the fractional frequency phase-locked loop, and a local oscillator frequency output by the fractional frequency phase-locked loop, and adjusts the frequency division ratio of the fractional frequency phase-locked loop to the target frequency division ratio.

10. The spurious control method according to claim 8, characterized in that: The signal transmission parameter includes the bandwidth of the analog filter in the analog front-end processing module; the parameter to be controlled includes the frequency division ratio of the fractional frequency phase-locked loop in the analog back-end processing module; When the control instruction is a second control instruction, the digital baseband processing module switches the working mode of the digital up converter in the digital baseband processing module to the up-conversion mode according to the second control instruction, and the frequency converter of the digital up converter determines the frequency of the intermediate frequency digital signal according to the digital local oscillator frequency output by the digital local oscillator module and the baseband signal; The analog front-end processing module adjusts the bandwidth of the analog filter to be greater than the frequency of the intermediate frequency digital signal according to the second control instruction; the bandwidth is used to indicate the suppression capability of the intermediate frequency analog signal sampling noise and far-end spurious; The analog back-end processing module determines a target frequency division ratio based on the second control instruction, the digital local oscillator frequency, the reference signal received by the fractional-frequency phase-locked loop, and the local oscillator frequency output by the fractional-frequency phase-locked loop, and adjusts the frequency division ratio of the fractional-frequency phase-locked loop to the target frequency division ratio.

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