A baseband signal processing method and device based on a heterogeneous multi-core system

Abstract

The application provides a baseband signal processing method and equipment based on a heterogeneous multi-core system, and belongs to the technical fields of communication and digital signal processing.The method comprises the following steps: a main control core analyzes a baseband signal waveform file, and acquires baseband signal data and baseband signal parameter information; a digital processing core receives the baseband signal parameter information through a bus channel, and reads the baseband signal data through a data transmission channel according to the baseband signal parameter information; the main control core sends radio frequency parameter information to the digital processing core through the bus channel; the digital processing core processes the baseband signal data according to the baseband signal parameter information and the radio frequency parameter information; and the digital processing core controls a digital-to-analog conversion chip to perform digital-to-analog conversion on the baseband signal data processed according to a preset configuration, so as to generate analog radio frequency data.The application guarantees the playing of multi-format and multi-standard signal sample files and real-time parameter control, and has obvious advantages.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication and digital signal processing, in particular to a baseband signal processing method and device based on a heterogeneous multi-core system. BACKGROUND

[0002] In the current communication equipment system, with the development and application of communication processing chips, the baseband processing performance of the communication system is also increasingly improved. Looking at the communication equipment system, for users, the service and control management of the baseband processing unit are two key points of the entire communication system, and better cooperation can realize efficient and stable operation of the system.

[0003] However, there are still cooperation problems in the function unit of signal playing and management control, data flow control instability problems of different rate modulation waveforms, and problems of real-time and flexibility of management configuration radio frequency signal parameters. SUMMARY

[0004] The present application provides a baseband signal processing method and device based on a heterogeneous multi-core system to solve at least one defect in the prior art.

[0005] In a first aspect, the present application provides a baseband signal processing method based on a heterogeneous multi-core system, which is realized by a processing core based on a heterogeneous multi-core system. The processing core includes a main control core and a digital processing core, and has a data transmission channel and a bus channel between the main control core and the digital processing core. The method includes: the main control core parses a baseband signal waveform file to obtain baseband signal data and baseband signal parameter information; the digital processing core receives the baseband signal parameter information through the bus channel and reads the baseband signal data through the data transmission channel according to the baseband signal parameter information; the main control core sends radio frequency parameter information to the digital processing core through the bus channel, and the digital processing core performs data processing on the baseband signal data according to the baseband signal parameter information and the radio frequency parameter information; and the digital processing core controls a digital-to-analog conversion chip to perform digital-to-analog conversion on the baseband signal data after data processing according to a preset configuration to generate analog radio frequency data.

[0006] According to the baseband signal processing method based on a heterogeneous multi-core system, the baseband signal parameter information includes file size, channel number, sampling rate, bit rate and bit width information of the baseband signal; and the radio frequency parameter information includes radio frequency signal bandwidth and radio frequency.

[0007] According to the baseband signal processing method based on the heterogeneous multi-core system, the digital processing core performs data processing on the baseband signal data according to the baseband signal parameter information and the radio frequency parameter information, and the method comprises the following steps: the digital processing core determines an interpolation multiple according to a sampling rate of the baseband signal and a data sampling rate of a digital-to-analog conversion chip, so as to perform interpolation processing on the baseband signal data; the digital processing core performs filtering processing on the data after the interpolation processing based on a radio frequency signal bandwidth; and the digital processing core determines a frequency of an eigen signal based on a radio frequency, so as to perform up-conversion processing on the data after the filtering processing.

[0008] According to the baseband signal processing method based on the heterogeneous multi-core system, before the master control core analyzes the baseband signal waveform file and obtains the baseband signal data and the baseband signal parameter information of the baseband signal, the method further comprises the following step: the master control core receives the baseband signal waveform file selected and sent by the host computer.

[0009] According to the baseband signal processing method based on the heterogeneous multi-core system, before the master control core sends the radio frequency parameter information to the digital processing core through the bus channel, the method further comprises the following step: the master control core receives the radio frequency parameter information set and sent by the host computer.

[0010] According to the baseband signal processing method based on the heterogeneous multi-core system, the data transmission channel is constructed based on AXI_BRAM of ZYNQ, and the bus channel is constructed based on AXI bus of ZYNQ.

[0011] According to the baseband signal processing method based on the heterogeneous multi-core system, the interpolation processing performed on the baseband signal data is multi-stage interpolation processing, and correspondingly, filtering processing is performed after each stage of interpolation processing.

[0012] In the second aspect, the application further provides a baseband signal processing device based on a heterogeneous multi-core system, which comprises: a host computer and a processing core based on a heterogeneous multi-core system; the host computer is used for setting a baseband signal waveform file to be played and radio frequency parameter information for playing; the processing core comprises a master control core and a digital processing core, and the master control core and the digital processing core have a data transmission channel and a bus channel therebetween; and the processing core is used for generating analog radio frequency data to play the baseband signal by using any of the baseband signal processing methods based on the heterogeneous multi-core system.

[0013] In the third aspect, the application further provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of any of the baseband signal processing methods based on the heterogeneous multi-core system.

[0014] The baseband signal processing method and device based on a heterogeneous multi-core system provided by the application adopt processing cores of a heterogeneous multi-core system to process baseband signal data, and realize the playing of multi-format and multi-standard signal sample files and real-time parameter control, thus having obvious advantages compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 is one of the flowcharts of the baseband signal processing method based on a heterogeneous multi-core system provided by the application;

[0017] Figure 2 is the overall framework diagram of the baseband signal processing method based on a heterogeneous multi-core system provided by the application;

[0018] Figure 3 is the second flowchart of the baseband signal processing method based on a heterogeneous multi-core system provided by the application. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the application clearer, the technical solutions in the application will be described clearly and completely in the following with reference to the drawings in the application. Obviously, the described embodiments are some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the application.

[0020] It should be noted that in the description of the embodiments of the present application, the terms "comprising", "containing" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. Unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] The terms "first", "second" and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally a class, and do not limit the number of objects, for example, the first object can be one or more.

[0022] The following will be described in detail Figures 1-3 The method and device for processing baseband signals based on a heterogeneous multi-core system are provided.

[0023] Figure 1 is one of the flowcharts of the method for processing baseband signals based on a heterogeneous multi-core system provided by the present application, which is realized by a processing core based on a heterogeneous multi-core system, for example, a ZYNQ communication processing chip, wherein the processing core of the chip includes a main control core PS and a digital processing core PL, and the main control core and the digital processing core have data transmission channels and bus channels; as Figure 1 shown, the method includes but is not limited to the following steps:

[0024] Step 101: The main control core parses the baseband signal waveform file to obtain baseband signal data and baseband signal parameter information.

[0025] Optionally, the method for processing baseband signals based on a heterogeneous multi-core system provided by the present application further comprises: the main control core receives the baseband signal waveform file selected and sent by the host computer before step 101.

[0026] It is understood that the present invention can use host computer software to select the baseband signal waveform file to be played and send the baseband signal waveform file to the main control core PS.

[0027] The baseband signal parameter information in this invention includes, but is not limited to: the file size, number of channels, sampling rate, bit rate, and bit width of the baseband signal.

[0028] Step 102: The digital processing core receives baseband signal parameter information through the bus channel and reads baseband signal data through the data transmission channel according to the baseband signal parameter information.

[0029] Optionally, the data transmission channel is built based on ZYNQ's AXI_BRAM; the bus channel is built based on ZYNQ's AXI bus.

[0030] Step 103: The main control core sends the RF parameter information to the digital processing core through the bus channel. The digital processing core processes the baseband signal data according to the baseband signal parameter information and the RF parameter information.

[0031] Optionally, the data processing includes, but is not limited to, interpolation, filtering, and up-conversion of the data.

[0032] Optionally, the baseband signal processing method based on a heterogeneous multi-core system provided by the present invention further includes, before step 103: the main control core receives radio frequency parameter information set and sent by the host computer.

[0033] It is understood that the host computer provided by this invention can also set radio frequency parameter information and send the radio frequency parameter information to the PS.

[0034] Further, step 103 specifically includes: the digital processing core PL determines the interpolation factor based on the sampling rate of the baseband signal and the data sampling rate of the digital-to-analog converter chip DA, so as to perform interpolation processing on the baseband signal data; the digital processing core performs filtering processing on the interpolated data based on the RF signal bandwidth; the digital processing core determines the frequency of the intrinsic signal based on the RF frequency, so as to perform up-conversion processing on the filtered data.

[0035] It should be noted that the interpolation processing of baseband signal data in this invention can be multi-stage interpolation processing, and correspondingly, filtering processing is also performed after each stage of interpolation processing.

[0036] Specifically, based on the signal sampling rate obtained from the baseband signal parameter information and the data sampling rate of the DA chip, the interpolation factor of the baseband signal data is determined, and an appropriate number of FIR filter stages and the interpolation factor for each stage are selected. Furthermore, the sampling clock of each FIR filter stage is kept consistent with the input data sampling rate of that stage.

[0037] Further, the frequency of the intrinsic signal when the application performs up-conversion processing is the required radio frequency.

[0038] Step 104: The digital processing core controls the digital-to-analog conversion chip to perform digital-to-analog conversion on the baseband signal data processed by the preset configuration, to generate analog radio frequency data.

[0039] Wherein, the PL configures the DA according to the bus protocol connected with the digital-to-analog conversion chip DA, and sends the baseband signal data processed in step 103 to the DA, to obtain analog radio frequency data transmission to the radio frequency port for emission.

[0040] It can be understood that when the parameter needs to be matched, the radio frequency parameter information is issued to the PS through the host computer software network, the PS issues the radio frequency parameter information through the AXI bus, the PL parses the corresponding radio frequency parameter according to the protocol header, and then configures the radio frequency signal parameter in the data processing process.

[0041] In order to more clearly illustrate the technical scheme of the application, an embodiment will be described below.

[0042] The application adopts a ZYNQ communication processing chip of a heterogeneous multi-core system, the processing core includes PS and PL, the PS is the master control, the PL is the baseband digital signal processing core, the PS and the PL are connected through the AXI bus to build an AXI_BRAM signal data transmission channel and an AXI bus control management channel.

[0043] Figure 2 is the overall framework diagram of the baseband signal processing method based on the heterogeneous multi-core system provided by the application, Figure 3 is the second flowchart of the baseband signal processing method based on the heterogeneous multi-core system provided by the application. Taking the system clock as 122.88MHz, the data clock of the DA as 122.88MHz, and the baud rate of the waveform file signal as 9600 as an example, the scheme implementation process is described in combination with Figure 2 and Figure 3

[0044] (1) Baseband signal waveform file reading and radio frequency signal parameter setting

[0045] a. The host computer software selects the baseband signal waveform file to be played, and sets the radio frequency parameter information to be played;

[0046] b. The host computer issues the baseband signal file and the radio frequency parameter information set in step a above to the PS;

[0047] (2) Baseband signal waveform file analysis and signal data transmission

[0048] ​a. PS parses the baseband signal waveform file according to the format of the baseband signal waveform file, and obtains a header and a data field;

[0049] b. The header part parses the file size, the number of sound channels, the sampling rate, the bit rate and the bit width information of the baseband signal, and sends them to the PL core through the AXI bus as parameters for subsequent data processing;

[0050] c. The data field part is the baseband signal data, and the PS writes the data into the AXI_BRAM through the AXI_BRAM controller according to the data bit width and the number of channels.

[0051] (3) Processing of baseband signal data

[0052] a. The PL reads the baseband signal data from the AXI_BRAM, wherein the clock for reading the data is consistent with the sampling rate of the signal. In this embodiment, the system clock 122.88MHz is divided to obtain a 9600Hz clock for sampling the signal data;

[0053] b. The PL performs interpolation processing on the baseband signal data:

[0054] According to the sampling rate of the baseband signal in step (2) and the data sampling rate of the DA chip, the interpolation multiple of the baseband signal data is determined, and appropriate FIR filter order and interpolation multiple of each level are selected. Moreover, the sampling clock of each level of FIR filter is consistent with the input data sampling rate of the filter.

[0055] In this embodiment, three levels of interpolation are adopted, and the interpolation multiples are 20, 20 and 32 respectively. Therefore, the first level interpolation sampling rate is 9600Hz, the second level interpolation sampling rate is 192KHz, and the third level interpolation sampling rate is 3.84MHz. After the third interpolation is completed, the signal sampling rate is 122.88MHz;

[0056] c. The PL filters the interpolated baseband signal data: in this embodiment, low-pass filtering is performed on the signal after each level of interpolation, and the filter coefficient is designed by using the filterDesigner tool of Matlab.

[0057] The sampling rate of the first level filter is the sampling rate of the input data multiplied by the interpolation multiple of the first level FIR filter, the passband frequency is half of the RF signal bandwidth, and the stopband frequency is 1.25 times of the passband frequency;

[0058] The sampling rate of the second level filter is the sampling rate of the input data multiplied by the interpolation multiple of the second level FIR filter, the passband frequency is half of the input data sampling rate value divided by 1.25, and the stopband frequency is half of the input data sampling rate value;

[0059] The third-stage filter and higher-stage filter design method is consistent with the second-stage filter design method. Specifically, the sampling rate, passband frequency and stopband frequency are respectively:

[0060] First stage: 192KHz, 1.5KHz (half of the radio frequency signal bandwidth), 1.875KHz;

[0061] Second stage: 3.84MHz, 76.8KHz (half of the radio frequency signal bandwidth), 96KHz;

[0062] Third stage: 122.88MHz, 1.536MHz (half of the radio frequency signal bandwidth), 1.95MHz;

[0063] d, the data after interpolation and filtering processing is up-converted:

[0064] Wherein, the frequency of the intrinsic signal during up-conversion is the required radio frequency; PL obtains the intrinsic signal through the DDS core, and then multiplies the data signal to obtain the processed data.

[0065] (4) signal data digital-to-analog conversion

[0066] PL configures DA according to the communication bus protocol connected with DA, and sends the baseband signal data after data processing to the data input end of DA, and DA performs digital-to-analog conversion on the baseband digital signal according to the configuration to obtain analog radio frequency data.

[0067] (5) configuration of radio frequency signal parameters (radio frequency parameter information)

[0068] a, first, the transmission protocol of the radio frequency parameters between the communication parties PS and PL is restricted;

[0069] b, the radio frequency parameter information configured by the upper computer and received by the PS is sent to the PL through the AXI bus according to the protocol in (5) a, such as the radio frequency parameter that PL needs to call when up-converting the baseband signal, and such as the radio frequency signal bandwidth parameter that PL needs to call when filtering the baseband signal;

[0070] c, signal parameters obtained by analyzing the waveform file header: the parameters are analyzed by the PS and transmitted to the PL through the AXI bus, such as file size, which is used as the length information of the subsequent PL reading signal data; and such as sampling rate, which is used as the sampling rate basis for subsequent signal data reading and processing.

[0071] The baseband signal processing method based on the heterogeneous multi-core system provided by the application uses the processing core of the heterogeneous multi-core system to process the baseband signal data, realizes the guarantee of playing multi-format and multi-standard signal sample files and real-time parameter control, and has obvious advantages compared with the prior art.

[0072] In another aspect, the present application also provides a baseband signal processing device based on a heterogeneous multi-core system, a host computer and a processing core based on a heterogeneous multi-core system; the host computer is used to set a baseband signal waveform file to be played and radio frequency parameter information of the playing; the processing core includes a main control core and a digital processing core, and the main control core and the digital processing core have a data transmission channel and a bus channel; the processing core is used to generate analog radio frequency data for playing the baseband signal by using any of the above baseband signal processing methods based on a heterogeneous multi-core system. The method includes: the main control core analyzes the baseband signal waveform file to obtain baseband signal data and baseband signal parameter information; the digital processing core receives the baseband signal parameter information through the bus channel, and reads the baseband signal data through the data transmission channel according to the baseband signal parameter information; the main control core sends the radio frequency parameter information to the digital processing core through the bus channel, and the digital processing core processes the baseband signal data according to the baseband signal parameter information and the radio frequency parameter information; the digital processing core controls a digital-to-analog conversion chip to perform digital-to-analog conversion on the baseband signal data processed according to the preset configuration, to generate analog radio frequency data.

[0073] In another aspect, the present application also provides a computer program product, the computer program product includes a computer program stored on a non-transitory computer readable storage medium, the computer program includes program instructions, when the program instructions are executed by a computer, the computer can execute the baseband signal processing method based on a heterogeneous multi-core system provided by each of the above embodiments, the method includes: the main control core analyzes the baseband signal waveform file to obtain baseband signal data and baseband signal parameter information; the digital processing core receives the baseband signal parameter information through the bus channel, and reads the baseband signal data through the data transmission channel according to the baseband signal parameter information; the main control core sends the radio frequency parameter information to the digital processing core through the bus channel, and the digital processing core processes the baseband signal data according to the baseband signal parameter information and the radio frequency parameter information; the digital processing core controls a digital-to-analog conversion chip to perform digital-to-analog conversion on the baseband signal data processed according to the preset configuration, to generate analog radio frequency data.

[0074] In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements a baseband signal processing method based on a heterogeneous multi-core system, as provided by any of the above embodiments, including: parsing, by a master control core, a baseband signal waveform file to obtain baseband signal data and baseband signal parameter information; receiving, by a digital processing core, the baseband signal parameter information through a bus channel, and reading the baseband signal data through a data transmission channel according to the baseband signal parameter information; sending, by the master control core, radio frequency parameter information to the digital processing core through the bus channel, and performing, by the digital processing core, data processing on the baseband signal data according to the baseband signal parameter information and the radio frequency parameter information; and controlling, by the digital processing core, a digital-to-analog conversion chip to perform digital-to-analog conversion on the baseband signal data processed to generate analog radio frequency data.

[0075] The above merely provides exemplary embodiments of the present application, but cannot limit the scope of the present application. Any equivalent changes and modifications made according to the teachings of the present application shall fall within the scope of the present application. Any implementation of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is intended to cover any variations, uses, or adaptations of the present application following the general principles thereof and including other types of art known to those skilled in the art. The specification and examples are to be regarded as exemplary in nature and not as restrictive. The scope of the present application is defined by the appended claims.

[0076] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they shall be considered within the scope of the present application.

[0077] Those skilled in the art will readily understand that the above described are only the preferred embodiments of the present application and are not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall fall within the scope of the present application.

Claims

1. A baseband signal processing method based on a heterogeneous multi-core system, characterized in that, The method is implemented using a processing core based on a heterogeneous multi-core architecture. The processing core includes a main control core and a digital processing core, with a data transmission channel and a bus channel between them. The method includes: The main control core parses the baseband signal waveform file to obtain baseband signal data and baseband signal parameter information; The digital processing core receives baseband signal parameter information through the bus channel and reads baseband signal data through the data transmission channel according to the baseband signal parameter information; The main control core sends the radio frequency parameter information to the digital processing core through the bus channel. The digital processing core processes the baseband signal data according to the baseband signal parameter information and the radio frequency parameter information. The digital processing core controls the digital-to-analog converter chip to perform digital-to-analog conversion on the processed baseband signal data according to the preset configuration, generating analog radio frequency data; Before the main control core sends the RF parameter information to the digital processing core via the bus channel, it also includes: The main control core receives radio frequency parameter information based on settings and transmissions from the host computer.

2. The baseband signal processing method based on a heterogeneous multi-core system according to claim 1, characterized in that, The baseband signal parameter information includes the baseband signal file size, number of channels, sampling rate, bit rate, and bit width information; The radio frequency parameter information includes: radio frequency signal bandwidth and radio frequency frequency.

3. The baseband signal processing method based on a heterogeneous multi-core system according to claim 2, characterized in that, The digital processing core performs data processing on the baseband signal data based on the baseband signal parameter information and radio frequency parameter information, including: The digital processing core determines the interpolation factor based on the sampling rate of the baseband signal and the data sampling rate of the digital-to-analog converter chip in order to perform interpolation processing on the baseband signal data; The digital processing core performs filtering on the interpolated data based on the RF signal bandwidth. The digital processing core determines the frequency of the intrinsic signal based on the radio frequency in order to perform up-conversion processing on the filtered data.

4. The baseband signal processing method based on a heterogeneous multi-core system according to claim 1, characterized in that, Before the main control core parses the baseband signal waveform file to obtain the baseband signal data and baseband signal parameter information, the process also includes: The main control core receives the baseband signal waveform file selected and sent by the host computer.

5. The baseband signal processing method based on a heterogeneous multi-core system according to claim 1, characterized in that, The data transmission channel is built based on ZYNQ's AXI_BRAM; the bus channel is built based on ZYNQ's AXI bus.

6. The baseband signal processing method based on a heterogeneous multi-core system according to claim 3, characterized in that, The interpolation processing of the baseband signal data is a multi-stage interpolation process, and correspondingly, filtering is performed after each stage of interpolation.

7. A baseband signal processing device based on a heterogeneous multi-core architecture, characterized in that, include: The host computer and the processing core based on a heterogeneous multi-core architecture; The host computer is used to set the baseband signal waveform file to be played and the radio frequency parameter information to be played. The processing core includes a main control core and a digital processing core, and there is a data transmission channel and a bus channel between the main control core and the digital processing core; The processing core is used to generate analog radio frequency data for baseband signal playback using any of the baseband signal processing methods based on heterogeneous multi-core architectures as described in claims 1 to 6.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the baseband signal processing method based on a heterogeneous multi-core architecture as described in any one of claims 1 to 6.

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