CN114362842B - Device and method suitable for 5G high-frequency band large-bandwidth multichannel channel detection - Google Patents
Device and method suitable for 5G high-frequency band large-bandwidth multichannel channel detection Download PDFInfo
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Abstract
The invention discloses a device and a method for detecting a 5G high-frequency band large-bandwidth multichannel channel, which belong to the field of wireless communication; the signal generating unit is used for completing the generation and modulation of the 5G channel detection vector signals, the 5G channel detection vector signals are transmitted to the wireless channel through the antenna, the receiving antenna is used for receiving the 5G channel detection vector signals in the wireless channel, the data acquisition receiving unit is used for carrying out data acquisition, storage and demodulation, meanwhile, instantaneous channel parameters are extracted based on IQ data acquired by channel measurement, statistical analysis is carried out on the extracted instantaneous channel parameters, and the average characteristics of a time-varying channel are described in a statistical mode to form channel modeling parameters. The invention reflects the MIMO characteristic of the wireless channel more truly; the 5G large bandwidth channel measurement is realized through the large bandwidth channel detection signal, and the large bandwidth characteristic of the wireless channel is reflected more truly by the broadband channel test.
Description
Technical Field
The invention belongs to the field of wireless communication, and particularly relates to a device and a method for detecting a 5G high-frequency band large-bandwidth multichannel channel.
Background
As a next generation mobile communication system, the 5G (the 5th Generation Mobile Communication System,5G) technology can further improve the spectrum efficiency in terms of spectrum, but the 5G still faces new spectrum requirements. WRC-19 specializes in 1.13 entitled IMT systems to find new frequencies, involving frequencies in the range 24.25-86GHz. For the 1.13 issue, CEPT has been discussed primarily for bands of priority or focus, with the focus bands being 24.25-27.5GHz, 31.8-33.4GHz, 40.5-43.5GHz, and 45.5-47.2GHz. No matter which frequency band is planned for 5G, boundaries for compatibility analysis need to be found from time domain, frequency domain, and space domain. Therefore, when the compatibility analysis is performed, the detailed information of the usage and planning of other radio services in the relevant frequency band needs to be mastered, including usage scenes, places, time and the like, so as to better find the coexistence and sharing space. The 5G is oriented to the high-frequency band and large-broadband field, the current frequency band is still in an exploration stage, and in the process of exploring the frequency band, electromagnetic compatibility analysis research is required to be carried out on the services of adjacent or similar frequency bands so as to protect the common healthy development of bilateral services. It follows that the spectrum resources of future 5G systems will still be scarce, and in addition to efficiently utilizing the allocated resources, the 5G systems need to seek more spectrum resources.
The 5G high-frequency channel detection becomes a key technology of a new spectrum resource of the 5G system, and can realize the analysis and verification of the key technology of the 5G system, the measurement and modeling of a key candidate frequency band wireless channel and the coexistence analysis of related radio services. At present, a millimeter wave vector network analyzer, an antenna and a turntable are mainly used for measuring the propagation characteristics of the 5G high frequency band in China, and the method has the defects that firstly, the measured parameters are time division, the influence on Sub-6G is small, and the influence on millimeter waves cannot be ignored; the second disadvantage is that the signal of the vector network analyzer is narrow-band, and there is imperfection for 5G large bandwidth channel measurement.
Disclosure of Invention
The invention aims to overcome the influence of traditional time division and narrow-band channel measurement, and provides a device and a method for detecting a 5G high-frequency band large-bandwidth multichannel channel, which realize millimeter wave MIMO channel test through system synchronization so as to enable the device to have parallel channel test capability; and 5G large bandwidth channel measurement is realized through the large bandwidth channel detection signal, so that the device has the capability of testing the broadband channel.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A multichannel channel detection device suitable for 5G high-frequency band large bandwidth comprises a signal generation unit, a data acquisition receiving unit, a transmitting antenna and a receiving antenna; wherein,
A signal generation unit configured to complete generation and modulation of the 5G channel sounding vector signal;
The data acquisition receiving unit is configured to acquire, store and demodulate data, extract instantaneous channel parameters based on IQ data acquired by channel measurement, and perform statistical analysis on the extracted instantaneous channel measurement parameters to describe the average characteristics of a time-varying channel in a statistical manner so as to form channel modeling parameters;
A transmit antenna configured to receive a signal;
a receiving antenna configured to transmit a signal;
The signal generating unit is used for completing the generation and modulation of the 5G channel detection vector signals, transmitting the signals to a wireless channel of a measured piece through a transmitting antenna, receiving the 5G channel detection vector signals in the wireless channel of the measured piece through a receiving antenna, performing data acquisition, storage and demodulation by a data acquisition receiving unit, extracting instantaneous channel parameters based on IQ data acquired by channel measurement, performing statistical analysis on the extracted instantaneous channel parameters, and describing the average characteristics of a time-varying channel in a statistical mode to form channel modeling parameters.
Preferably, the signal generating unit comprises a baseband emission processing host, a millimeter wave multichannel emission extension, a power amplification component, a mobile power supply and an atomic clock;
The baseband transmission processing host comprises an FPGA, a DSP and a DAC, and is configured to generate PN sequences with Nu paths orthogonal to each other according to the data rate of the DAC at a transmitting end, the bandwidth of a required transmitting signal, the time length of a transmitting waveform and the number of channels, and respectively generate Nu paths of I/Q baseband signals according to the Nu paths of PN sequences and output the signals to the millimeter wave multichannel transmission extension;
The millimeter wave multichannel transmitting extension comprises a transmitting channel module and a local oscillator module; the baseband signal enters a modulator of the transmitting channel module, the local oscillation module generates the local oscillation signal according to the carrier frequency required to be transmitted by the signal generating unit, the local oscillation signal enters the transmitting channel module, the frequency multiplication and the filtering are carried out on the local oscillation signal, the local oscillation signal is input to the modulator, the modulator modulates the baseband signal into a radio frequency signal, and the radio frequency signal is output to the power amplification assembly;
The power amplification assembly is configured to amplify the power of the radio frequency signal and then output the amplified radio frequency signal to the transmitting antenna;
An atomic clock configured to provide a GPS reference clock and a synchronization signal for synchronization of the signal generation unit;
And the mobile power supply is configured to provide alternating current output and power supply for the signal generating unit for outdoor channel test requirements.
Preferably, the data acquisition and receiving unit comprises a baseband receiving and processing host, a millimeter wave multichannel receiving extension, a storage device, a low-noise amplifier assembly, a mobile power supply and an atomic clock;
The millimeter wave multichannel receiving extension comprises a receiving channel module and a local oscillator module; the receiving channel module receives the radio frequency signal, the radio frequency signal enters a mixer in the receiving module after amplitude adjustment, the local oscillation module generates a corresponding local oscillation signal according to the frequency of the signal received by the receiving channel, and the local oscillation signal is input to the mixer after frequency multiplication and filtering; the intermediate frequency baseband signal mixed by the mixer in the receiving channel is amplified and filtered and then is input to a baseband receiving processing host for signal analysis;
the baseband receiving and processing host comprises an FPGA, a DSP and an ADC, an intermediate frequency baseband signal is acquired through an AD and is divided into two paths of IQ 16bit signals, and the IQ 16bit signals are transmitted to the storage device through an optical port after being processed by the baseband;
the storage device is configured to store the processed channel detection data, extract instantaneous channel parameters, perform statistical analysis on the extracted channel measurement instantaneous parameters, and describe the average characteristics of the time-varying channels in a statistical manner to form channel parameters;
the low-noise amplifier assembly is configured to receive a low-power radio frequency signal through the receiving antenna, amplify the low-power radio frequency signal and output the amplified low-power radio frequency signal to the millimeter wave multichannel receiving extension;
an atomic clock configured to provide a GPS reference clock and a synchronization signal for synchronization of the data acquisition receiving unit;
and the mobile power supply is configured to provide alternating current output, and power supply for the data acquisition receiving unit for outdoor channel test requirements.
In addition, the invention also provides a method for detecting the multichannel channel suitable for the 5G high-frequency band and the large bandwidth, which adopts the device for detecting the multichannel channel suitable for the 5G high-frequency band and the large bandwidth, and specifically comprises the following steps:
Step 1: the generation and modulation of the 5G channel detection vector signal are completed through a signal generation unit;
step 2: the 5G channel detection vector signals are transmitted to a wireless channel of a tested piece through a transmitting antenna;
Step 3: the receiving antenna receives a 5G channel detection vector signal in a wireless channel of a measured piece;
Step 4: and carrying out data acquisition, storage and demodulation through a data acquisition receiving unit, extracting instantaneous channel parameters based on IQ data acquired by channel measurement, carrying out statistical analysis on the extracted instantaneous channel measurement parameters, and describing the average characteristics of a time-varying channel in a statistical manner to form channel modeling parameters.
The invention has the beneficial technical effects that:
According to the invention, through multi-channel MIMO channel test, the parallel channel test can more truly reflect the MIMO characteristic of the wireless channel; the 5G large bandwidth channel measurement is realized through the large bandwidth channel detection signal, and the large bandwidth characteristic of the wireless channel is reflected more truly by the broadband channel test; the device has flexible expandability in working frequency points, channel numbers, working modes and the like, and can realize the analysis and verification of key technology of a 5G system and the measurement and modeling of key candidate frequency band wireless channels; technical support is provided for planning and allocation of frequency resources of important business, and the method is used for 5G channel research of national radio spectrum management and scientific research institutes.
According to the invention, through multi-channel MIMO channel test, the parallel channel test can more truly reflect the MIMO characteristic of the wireless channel.
The invention realizes 5G large bandwidth channel measurement through the large bandwidth channel detection signal, and the broadband channel test reflects the large broadband characteristic of the wireless channel more truly.
The baseband processing and the radio frequency processing are separated, which is beneficial to system upgrading and expanding.
The invention adopts parallel MIMO broadband detection, which is beneficial to system upgrading and expansion.
The millimeter wave multichannel transmitting extension set adopts a local oscillator design principle, can realize MIMO test, miniaturization and cost reduction, and is convenient for cascade connection and synchronization between channels.
The millimeter wave multichannel receiving extension set adopts a local oscillator design principle, can realize MIMO test, miniaturization and cost reduction, and is convenient for cascade connection and synchronization between channels.
Drawings
FIG. 1 is a block diagram of a large bandwidth multi-channel sounding device suitable for 5G high frequency bands;
FIG. 2 is a schematic block diagram of a baseband transmit processing host;
fig. 3 is a schematic block diagram of a millimeter wave multichannel transmitting extension;
fig. 4 is a schematic block diagram of a millimeter wave multichannel receiver extension;
fig. 5 is a schematic block diagram of a baseband receiving processing host;
Fig. 6 is a flow chart of channel sounding signal processing.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
The device comprises a signal generating unit, a data acquisition receiving unit and a receiving and transmitting antenna, wherein as shown in figure 1, millimeter wave MIMO channel test is realized through atomic clock synchronous signals, so that the device has parallel channel test capability; and 5G large bandwidth channel measurement is realized through the large bandwidth channel detection signal, so that the device has the capability of testing the broadband channel.
The invention provides a multichannel channel detection device suitable for 5G high-frequency band and large bandwidth, which comprises: the system comprises a signal generating unit, a data acquisition receiving unit and a receiving and transmitting antenna, wherein the signal generating unit comprises a baseband transmitting processing host, a millimeter wave multichannel transmitting extension, a power amplifier assembly, a mobile power supply and an atomic clock; the data acquisition receiving unit comprises a baseband receiving processing host, a millimeter wave multichannel receiving extension, a mass storage device, a low-noise amplifier component, a mobile power supply and an atomic clock. The signal generating unit completes the generation and modulation of the 5G channel detection vector signal, the signal is transmitted to a wireless channel of a measured piece through an antenna, the receiving antenna receives the 5G channel detection vector signal in the wireless channel of the measured piece, the data acquisition receiving unit performs data acquisition, storage and demodulation, meanwhile, instantaneous channel parameters are extracted based on IQ data acquired by channel measurement, statistical analysis is performed on the extracted instantaneous parameters of the channel measurement, the average characteristics of time-varying channels are described in a statistical mode, channel modeling parameters are formed, and example parameters are shown in table 2 based on the device.
System parameter configuration table
| Configuration parameters | 24-86GHz measurement |
| Center frequency | 26GHz |
| Bandwidth of a communication device | 1GHz |
| Number of channels | 16 |
| Transmission power | 30dBm |
| Minimum resolution | 0.005Hz |
| Display noise level | Less than or equal to-65 dBm@1 GHz bandwidth |
| DAC/ADC data rate | 2.4576GSPS |
| Transmitting antenna | 4 X 4 planar antenna array |
| Receiving antenna | 4 X 4 planar antenna array |
| Antenna gain | 25dBi |
| Power amplifier gain | 20dB |
The baseband transmitting processing host comprises an FPGA+DSP, a DAC board card and the like, and as shown in fig. 2, 16 paths of mutually orthogonal PN sequences are generated according to the required transmitting signal bandwidth (1 GHz), the time length (10 ms) of a transmitting waveform and the channel number (16) according to the DAC data rate (2.4576 GSPS), and Nu paths of I/Q baseband signals are respectively generated according to the 16 paths of PN sequences and are output to the millimeter wave multichannel transmitting extension.
The millimeter wave multichannel transmitting extension comprises a control interface module, a transmitting channel module and a local oscillator module, wherein as shown in figure 3, the number of channels is 16, the bandwidth is 1GHz, and the frequency resolution is 0.005Hz; the baseband signal enters the modulator of the transmitting channel module, the local oscillation module generates the local oscillation signal according to the carrier frequency required to be transmitted by the signal generating unit, and the local oscillation signal enters the transmitting channel and is input to the modulator after frequency multiplication and filtering. The modulator modulates the baseband signal and outputs the radio frequency signal to the power amplifier component through the amplitude control of the transmitting channel. The millimeter wave multichannel transmitting extension adopts a local oscillator design principle, so that MIMO test can be realized and cost can be reduced.
The power amplifier component selects 16 80215FD amplifiers, 16 80215KB amplifiers and 16 80215NF amplifiers with 20dB gain to realize 24-86GHz frequency band coverage and 30dB signal output. The radio frequency signal enters the power amplification component to amplify power and output the amplified power to the antenna for transmission, so as to meet the detection requirement of long-distance channel space.
The low-noise amplifier assembly is used for improving the small signal receiving capacity of the data acquisition receiving unit by selecting 16 low-noise amplifiers of 80230F, 16 low-noise amplifiers of 80230KA and 16 low-noise amplifiers of 80230NB, wherein the noise coefficient of the low-noise amplifier assembly is lower than 4 dBd. The low-noise amplifier component receives low-power radio frequency signals through the receiving antenna, amplifies the low-power radio frequency signals and outputs millimeter wave multichannel receiving extension sets.
The millimeter wave multichannel receiving extension set comprises a control interface module, a receiving channel module and a local oscillator module, wherein as shown in fig. 4, the number of channels is 16, the bandwidth is 1GHz, the frequency resolution is 0.005Hz, and the display noise level is less than-65 dBm@1 GHz bandwidth; the receiving channel module receives the radio frequency signal, the amplitude of the radio frequency signal is adjusted, the radio frequency signal enters a mixer in the receiving module, the local oscillation module generates a corresponding local oscillation signal according to the frequency of the signal received by the receiving channel, and the local oscillation signal is input to the mixer after frequency multiplication and filtering. The mixer in the receiving channel mixes out the intermediate frequency baseband signal, and inputs the signal to the baseband receiving processing host after amplifying and filtering. The millimeter wave multichannel receiving extension adopts a local oscillator design principle, so that MIMO test can be realized and cost can be reduced.
The baseband receiving and processing host comprises an FPGA+DSP, an ADC board card and the like, as shown in figure 5, the intermediate frequency point is 614.4MHz, and the sampling data rate is 2.4576GSPS. The intermediate frequency baseband signal is collected by the ADC board card and is divided into two paths of 16bit signals of IQ, and the IQ signals are transmitted to the mass storage device through the optical port after being processed by the baseband.
The mass storage device stores the channel detection data processed for a long time, extracts instantaneous channel parameters, performs statistical analysis on the extracted channel measurement instantaneous parameters, describes the average characteristics of the time-varying channel in a statistical manner, and forms channel parameters, and the flow is shown in figure 6.
The atomic clock selects two types of BM1304-25A GPS/BDS, which are respectively used for the signal generating unit and the data acquisition receiving unit, provides high-performance GPS/BDS atomic frequency standard, has rich output signal types and quantity, has high frequency accuracy and long-term frequency stability, can provide high-performance GPS reference clock and synchronous signal, and is used for the synchronization of the signal generating unit and the data acquisition receiving unit.
The mobile power supply adopts a power frequency online UPS, adopts an advanced full DSP digital control technology, can meet the mobility and power supply requirements of a test scheme under various scenes, can meet the battery backup time of more than 6 hours when the load is about 800w, provides power for a signal generating unit and a data acquisition receiving unit, and is used for outdoor channel test requirements.
According to the invention, through multi-channel MIMO channel test, the parallel channel test can more truly reflect the MIMO characteristic of the wireless channel; the 5G large bandwidth channel measurement is realized through the large bandwidth channel detection signal, and the large bandwidth characteristic of the wireless channel is reflected more truly by the broadband channel test; the device has flexible expandability in working frequency points, channel numbers, working modes and the like, and can realize the analysis and verification of key technology of a 5G system and the measurement and modeling of key candidate frequency band wireless channels; technical support is provided for planning and allocation of frequency resources of important business, and the method is used for 5G channel research of national radio spectrum management and scientific research institutes.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (2)
1. The utility model provides a be applicable to 5G high frequency channel big bandwidth multichannel channel detection device which characterized in that: the system comprises a signal generating unit, a data acquisition receiving unit, a transmitting antenna and a receiving antenna; wherein,
A signal generation unit configured to complete generation and modulation of the 5G channel sounding vector signal;
The data acquisition receiving unit is configured to acquire, store and demodulate data, extract instantaneous channel parameters based on IQ data acquired by channel measurement, and perform statistical analysis on the extracted instantaneous channel measurement parameters to describe the average characteristics of a time-varying channel in a statistical manner so as to form channel modeling parameters;
A transmit antenna configured to receive a signal;
a receiving antenna configured to transmit a signal;
The signal generating unit completes the generation and modulation of the 5G channel detection vector signal, the signal is transmitted to a wireless channel of a measured piece through a transmitting antenna, the receiving antenna receives the 5G channel detection vector signal in the wireless channel of the measured piece, the data acquisition receiving unit performs data acquisition, storage and demodulation, meanwhile, instantaneous channel parameters are extracted based on IQ data acquired by channel measurement, statistical analysis is performed on the extracted instantaneous channel measurement parameters, the average characteristic of a time-varying channel is described in a statistical mode, and channel modeling parameters are formed;
The signal generating unit comprises a baseband emission processing host, a millimeter wave multichannel emission extension, a power amplification assembly, a mobile power supply and an atomic clock;
The baseband transmission processing host comprises an FPGA, a DSP and a DAC, and is configured to generate PN sequences with Nu paths orthogonal to each other according to the data rate of the DAC at a transmitting end, the bandwidth of a required transmitting signal, the time length of a transmitting waveform and the number of channels, and respectively generate Nu paths of I/Q baseband signals according to the Nu paths of PN sequences and output the signals to the millimeter wave multichannel transmission extension;
The millimeter wave multichannel transmitting extension comprises a transmitting channel module and a local oscillator module; the baseband signal enters a modulator of the transmitting channel module, the local oscillation module generates the local oscillation signal according to the carrier frequency required to be transmitted by the signal generating unit, the local oscillation signal enters the transmitting channel module, the frequency multiplication and the filtering are carried out on the local oscillation signal, the local oscillation signal is input to the modulator, the modulator modulates the baseband signal into a radio frequency signal, and the radio frequency signal is output to the power amplification assembly;
The power amplification assembly is configured to amplify the power of the radio frequency signal and then output the amplified radio frequency signal to the transmitting antenna;
An atomic clock configured to provide a GPS reference clock and a synchronization signal for synchronization of the signal generation unit;
A mobile power supply configured to provide an alternating current output, power to the signal generating unit, for outdoor channel testing requirements;
the data acquisition and receiving unit comprises a baseband receiving and processing host, a millimeter wave multichannel receiving extension, storage equipment, a low-noise amplifier component, a mobile power supply and an atomic clock;
The millimeter wave multichannel receiving extension comprises a receiving channel module and a local oscillator module; the receiving channel module receives the radio frequency signal, the radio frequency signal enters a mixer in the receiving module after amplitude adjustment, the local oscillation module generates a corresponding local oscillation signal according to the frequency of the signal received by the receiving channel, and the local oscillation signal is input to the mixer after frequency multiplication and filtering; the intermediate frequency baseband signal mixed by the mixer in the receiving channel is amplified and filtered and then is input to a baseband receiving processing host for signal analysis;
the baseband receiving and processing host comprises an FPGA, a DSP and an ADC, an intermediate frequency baseband signal is acquired through an AD and is divided into two paths of IQ 16bit signals, and the IQ 16bit signals are transmitted to the storage device through an optical port after being processed by the baseband;
the storage device is configured to store the processed channel detection data, extract instantaneous channel parameters, perform statistical analysis on the extracted channel measurement instantaneous parameters, and describe the average characteristics of the time-varying channels in a statistical manner to form channel parameters;
the low-noise amplifier assembly is configured to receive a low-power radio frequency signal through the receiving antenna, amplify the low-power radio frequency signal and output the amplified low-power radio frequency signal to the millimeter wave multichannel receiving extension;
an atomic clock configured to provide a GPS reference clock and a synchronization signal for synchronization of the data acquisition receiving unit;
and the mobile power supply is configured to provide alternating current output, and power supply for the data acquisition receiving unit for outdoor channel test requirements.
2. A multichannel channel detection method suitable for 5G high-frequency band large bandwidth is characterized in that: the device for detecting the multichannel channel suitable for the 5G high-frequency band and the large bandwidth according to the claim 1 comprises the following steps:
Step 1: the generation and modulation of the 5G channel detection vector signal are completed through a signal generation unit;
step 2: the 5G channel detection vector signals are transmitted to a wireless channel of a tested piece through a transmitting antenna;
Step 3: the receiving antenna receives a 5G channel detection vector signal in a wireless channel of a measured piece;
Step 4: and carrying out data acquisition, storage and demodulation through a data acquisition receiving unit, extracting instantaneous channel parameters based on IQ data acquired by channel measurement, carrying out statistical analysis on the extracted instantaneous channel measurement parameters, and describing the average characteristics of a time-varying channel in a statistical manner to form channel modeling parameters.
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