CN114422410A - Multi-channel signal processing device and method - Google Patents
Multi-channel signal processing device and method Download PDFInfo
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- CN114422410A CN114422410A CN202111631971.2A CN202111631971A CN114422410A CN 114422410 A CN114422410 A CN 114422410A CN 202111631971 A CN202111631971 A CN 202111631971A CN 114422410 A CN114422410 A CN 114422410A
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/12—Network monitoring probes
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention discloses a multichannel signal processing device and a multichannel signal processing method, which belong to the technical field of signal processing. The invention is suitable for signal processing of the Internet of things, greatly improves the transmission stability, expands a transmission channel to at most support two-sending and two-receiving, has rich external interfaces, is suitable for research and development personnel with high requirements on data transmission stability and more channels, is convenient for long-time data processing, and provides a powerful guarantee platform for development, research and authentication.
Description
Technical Field
The invention belongs to the technical field of signal processing, and particularly relates to a multi-channel signal processing device and method.
Background
At present, with the development of communication, the technology of internet of things has been developed, and because the test of the signals of the internet of things has the characteristics of multiple scenes and long time, the size and the power consumption of a signal processing device have high requirements, and the characteristics of outdoor operation need to be met. The signal processing device in the early stage is processed singly, and the whole machine size is large, so that the outdoor operation is difficult to meet, and the requirement for simultaneously carrying out transceiving test on the Internet of things signals is not met.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a multi-channel signal processing device and a multi-channel signal processing method, which are reasonable in design, overcome the defects of the prior art and have good effects.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-channel signal processing device comprises a baseband processing module and a radio frequency processing module;
the baseband processing module comprises an FPGA, an ARM and an external interface;
the peripheral interfaces comprise an FMC interface, an HDMI interface, an SD card socket, a network port and a USB port;
the FPGA and the ARM are used as cores for data processing and are transmitted through an extensible interface AXI bus;
the FPGA is configured to be used for controlling data processing and channels;
the ARM is configured to be used for carrying out joint processing on data and data interaction with a user control interface;
an FMC interface configured as a communication channel for the FPGA and the AD9361 chip;
the HDMI is configured to be connected with a display screen and can display and view an operating system in the ARM;
the SD card socket is configured for plugging and unplugging an SD card, wherein the SD card can realize programming of an FPGA program;
the network port is configured to realize data interaction between the ARM and the user control interface and control over the whole module;
the USB port is configured to be connected with a peripheral including a mouse and a keyboard, and is convenient for operating an operating system in the ARM;
the radio frequency processing module comprises a low noise amplifier, a frequency mixer, a low pass filter, an ADC, a DAC and a serial peripheral SPI interface module;
a low noise amplifier configured to increase a power of a desired signal, enhancing a signal-to-noise ratio;
a mixer configured to up-convert a baseband signal with a carrier or down-convert a received signal;
a low pass filter configured to filter out-of-band noise;
an ADC configured to sample a received analog signal into a digital signal;
a DAC configured to convert a numerical signal to an analog signal;
and the serial peripheral SPI interface module is configured to be used for configuring the initialization of the ADC module and enabling the ADC module to start working.
Preferably, the ADC uses an AD9361 chip.
Preferably, the AD9361 chip includes two transmitting channels and two receiving channels, supports two operating modes of TDD and FDD, and is connected to the baseband processing module through a dual-channel 12-bit parallel data port.
In addition, the present invention also provides a multi-channel signal processing method, which adopts the above multi-channel signal processing apparatus, and specifically includes the following steps:
step 1: configuring a low noise amplifier, a mixer, a low pass filter, an ADC and a DAC in the radio frequency processing module through the FPGA to enable the low noise amplifier, the mixer, the low pass filter, the ADC and the DAC to work normally;
step 2: two receiving channels in the AD9361 chip receive signals, then sample the signals, and transmit data to the FPGA through an FMC interface;
and step 3: the AD bit width of the AD9361 chip is 12 bits, after zero padding, data is spliced into 32 bits and transmitted to the ARM through the AXI bus;
and 4, step 4: the ARM reads data in real time and transmits the data to the internet port, and a user control interface analyzes the data in real time after receiving the data, so that the signal analysis and demodulation function of the internet of things is realized;
and 5: the user control interface sends the standard NB-IoT data to the ARM, and the ARM stores the data and then takes out the data, and then transmits the data to the FPGA through the AXI bus;
step 6: the FPGA buffers the received data and then stores the data into the DDR 3; after the storage is finished, circularly sending down the data stored in the DDR3, and finally converting the data into differential data to be transmitted to an AD9361 chip;
and 7: the transmitted standard NB-IoT data is changed into analog signals through the DAC and is output from two transmitting ports.
The invention has the following beneficial technical effects:
the invention is suitable for signal processing of the Internet of things, greatly improves the transmission stability, expands a transmission channel to at most support two-sending and two-receiving, has rich external interfaces, is suitable for research and development personnel with high requirements on data transmission stability and more channels, is convenient for long-time data processing, and provides a powerful guarantee platform for development, research and authentication.
Drawings
Fig. 1 is a schematic structural diagram of a baseband processing module of a two-transmitter and two-receiver efficient signal processing apparatus of an internet of things according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
example 1:
as shown in fig. 1, a multi-channel signal processing apparatus includes a baseband processing module and a radio frequency processing module;
the baseband processing module comprises an FPGA, an ARM and an external interface;
the peripheral interfaces comprise an FMC interface, an HDMI interface, an SD card socket, a network port and a USB port;
the FPGA and the ARM are used as cores for data processing and are transmitted through an extensible interface AXI bus;
the FPGA is configured to be used for controlling data processing and channels;
the ARM is configured to be used for carrying out joint processing on data and data interaction with a user control interface;
an FMC interface configured as a communication channel for the FPGA and the AD9361 chip;
the HDMI is configured to be connected with a display screen and can display and view an operating system in the ARM;
the SD card socket is configured for plugging and unplugging an SD card, wherein the SD card can realize programming of an FPGA program;
the network port is configured to realize data interaction between the ARM and the user control interface and control over the whole module;
the USB port is configured to be connected with a peripheral including a mouse and a keyboard, and is convenient for operating an operating system in the ARM;
the radio frequency processing module comprises a low noise amplifier, a frequency mixer, a low pass filter, an ADC, a DAC and a serial peripheral SPI interface module;
a low noise amplifier configured to increase a power of a desired signal, enhancing a signal-to-noise ratio;
a mixer configured to up-convert a baseband signal with a carrier or down-convert a received signal;
a low pass filter configured to filter out-of-band noise;
an ADC configured to sample a received analog signal into a digital signal;
a DAC configured to convert a numerical signal to an analog signal;
and the serial peripheral SPI interface module is configured to be used for configuring the initialization of the ADC module and enabling the ADC module to start working.
The ADC adopts an AD9361 chip.
The AD9361 chip comprises two transmitting channels and two receiving channels, supports two working modes of TDD and FDD, and is connected with the baseband processing module through a dual-channel 12-bit parallel data port.
Example 2:
on the basis of the above embodiment 1, the present invention further provides a multi-channel signal processing method, which specifically includes the following steps:
step 1: configuring a low noise amplifier, a mixer, a low pass filter, an ADC and a DAC in the radio frequency processing module through the FPGA to enable the low noise amplifier, the mixer, the low pass filter, the ADC and the DAC to work normally;
step 2: two receiving channels in the AD9361 chip receive signals, then sample the signals, and transmit data to the FPGA through an FMC interface;
and step 3: the AD bit width of the AD9361 chip is 12 bits, after zero padding, data is spliced into 32 bits and transmitted to the ARM through the AXI bus;
and 4, step 4: the ARM reads data in real time and transmits the data to the internet port, and a user control interface analyzes the data in real time after receiving the data, so that the signal analysis and demodulation function of the internet of things is realized;
and 5: the user control interface sends the standard NB-IoT data to the ARM, and the ARM stores the data and then takes out the data, and then transmits the data to the FPGA through the AXI bus;
step 6: the FPGA buffers the received data and then stores the data into the DDR 3; after the storage is finished, circularly sending down the data stored in the DDR3, and finally converting the data into differential data to be transmitted to an AD9361 chip;
and 7: the transmitted standard NB-IoT data is changed into analog signals through the DAC and is output from two transmitting ports.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (4)
1. A multi-channel signal processing apparatus characterized by: the device comprises a baseband processing module and a radio frequency processing module;
the baseband processing module comprises an FPGA, an ARM and an external interface;
the peripheral interfaces comprise an FMC interface, an HDMI interface, an SD card socket, a network port and a USB port;
the FPGA and the ARM are used as cores for data processing and are transmitted through an extensible interface AXI bus;
the FPGA is configured to be used for controlling data processing and channels;
the ARM is configured to be used for carrying out joint processing on data and data interaction with a user control interface;
an FMC interface configured as a communication channel for the FPGA and the AD9361 chip;
the HDMI is configured to be connected with a display screen and can display and view an operating system in the ARM;
the SD card socket is configured for plugging and unplugging an SD card, wherein the SD card can realize programming of an FPGA program;
the network port is configured to realize data interaction between the ARM and the user control interface and control over the whole module;
the USB port is configured to be connected with a peripheral including a mouse and a keyboard, and is convenient for operating an operating system in the ARM;
the radio frequency processing module comprises a low noise amplifier, a frequency mixer, a low pass filter, an ADC, a DAC and a serial peripheral SPI interface module;
a low noise amplifier configured to increase a power of a desired signal, enhancing a signal-to-noise ratio;
a mixer configured to up-convert a baseband signal with a carrier or down-convert a received signal;
a low pass filter configured to filter out-of-band noise;
an ADC configured to sample a received analog signal into a digital signal;
a DAC configured to convert a numerical signal to an analog signal;
and the serial peripheral SPI interface module is configured to be used for configuring the initialization of the ADC module and enabling the ADC module to start working.
2. The multi-channel signal processing apparatus according to claim 1, characterized in that: the ADC adopts an AD9361 chip.
3. The multi-channel signal processing apparatus according to claim 2, characterized in that: the AD9361 chip comprises two transmitting channels and two receiving channels, supports two working modes of TDD and FDD, and is connected with the baseband processing module through a dual-channel 12-bit parallel data port.
4. A multi-channel signal processing method, characterized by: a multi-channel signal processing apparatus according to claim 3, comprising:
step 1: configuring a low noise amplifier, a mixer, a low pass filter, an ADC and a DAC in the radio frequency processing module through the FPGA to enable the low noise amplifier, the mixer, the low pass filter, the ADC and the DAC to work normally;
step 2: two receiving channels in the AD9361 chip receive signals, then sample the signals, and transmit data to the FPGA through an FMC interface;
and step 3: the AD bit width of the AD9361 chip is 12 bits, after zero padding, data is spliced into 32 bits and transmitted to the ARM through the AXI bus;
and 4, step 4: the ARM reads data in real time and transmits the data to the internet port, and a user control interface analyzes the data in real time after receiving the data, so that the signal analysis and demodulation function of the internet of things is realized;
and 5: the user control interface sends the standard NB-IoT data to the ARM, and the ARM stores the data and then takes out the data, and then transmits the data to the FPGA through the AXI bus;
step 6: the FPGA buffers the received data and then stores the data into the DDR 3; after the storage is finished, circularly sending down the data stored in the DDR3, and finally converting the data into differential data to be transmitted to an AD9361 chip;
and 7: the transmitted standard NB-IoT data is changed into analog signals through the DAC and is output from two transmitting ports.
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| CN202111631971.2A CN114422410A (en) | 2021-12-29 | 2021-12-29 | Multi-channel signal processing device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115865688A (en) * | 2022-11-25 | 2023-03-28 | 天津光电通信技术有限公司 | Double-channel high-speed analog acquisition playback equipment |
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