CN111954244A - 5G signal simulation method and device, electronic equipment and storage medium - Google Patents
5G signal simulation method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the invention relates to the field of signal simulation, and discloses a 5G signal simulation method and device, electronic equipment and a storage medium. The signal simulation method comprises the following steps: generating a bit stream, and coding and rate matching the bit stream to obtain a narrowband physical downlink shared channel code word; modulating, mapping and coding the code word of the narrow-band physical downlink shared channel to obtain a complex symbol; obtaining a time domain waveform according to a pre-constructed narrowband reference signal sequence and the complex symbols, and performing fading simulation on the time domain waveform to obtain a pseudo-real signal script; and converting the virtual real signal script into a virtual real physical signal. The embodiment of the invention obtains the quasi-physical signal by the simulation method, and the signal is obtained by the simulation method, so that the obtaining efficiency of the obtained signal can be improved on the premise of consuming lower material resources.
Description
Technical Field
The present invention relates to the field of signal simulation, and in particular, to a method and an apparatus for signal simulation, an electronic device, and a storage medium.
Background
In the communication field, the block error rate of a baseband signal directly determines the quality of the whole communication signal, and after the actual deployment of equipment, the block error rate is increased due to the increase of service grouping, weak network coverage, same frequency interference of a base station, pilot frequency pollution and other problems, so that the service performance is reduced, and the application of a user is influenced.
The inventor finds that, with the development of the 5G technology, the acquisition of the actual transmission signal for the block error rate test not only consumes a large amount of material resources, but also fails to achieve the purpose of signal transmission evaluation through the block error rate test due to the low acquisition efficiency of the actual transmission signal, and cannot meet the development requirements of the current 5G technology.
Disclosure of Invention
An object of embodiments of the present invention is to provide a signal simulation method, apparatus, electronic device, and storage medium, in which a pseudo-real signal is obtained by performing simulation on a generated bitstream, and a signal obtained according to the simulation can improve the acquisition efficiency of the obtained signal on the premise of consuming relatively low material resources.
In order to solve the above technical problem, an embodiment of the present invention provides a signal simulation method, where the method includes: generating a bit stream, and coding and rate matching the bit stream to obtain a narrowband physical downlink shared channel code word; modulating, mapping and coding the code word of the narrow-band physical downlink shared channel to obtain a complex symbol; obtaining a time domain waveform according to a pre-constructed narrowband reference signal sequence and the complex symbols, and performing fading simulation on the time domain waveform to obtain a pseudo-real signal script; and converting the virtual real signal script into a virtual real physical signal.
In order to solve the above problem, the present invention also provides a signal simulation apparatus, including: the code word generating module is used for generating a bit stream, coding the bit stream and carrying out rate matching to obtain a narrow-band physical downlink shared channel code word; a complex symbol generating module, configured to modulate and map-code the narrowband physical downlink shared channel codeword to obtain a complex symbol; the quasi-real signal script generation module is used for obtaining a time domain waveform according to a pre-constructed narrowband reference signal sequence and the complex symbols, and carrying out fading simulation on the time domain waveform to obtain a quasi-real signal script; and the signal generation module is used for converting the real-simulated signal script into a real-simulated physical signal.
In order to solve the above problem, the present invention also provides an electronic device, including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the signal simulation method.
In order to solve the above problem, the present invention further provides a computer-readable storage medium, which stores at least one instruction, wherein the at least one instruction is executed by a processor in an electronic device to implement the signal simulation method.
The embodiment of the invention takes a narrow-band physical downlink shared channel as a transmission channel basis, firstly generates a bit stream, and meets the requirement of a code word conforming to the narrow-band physical downlink shared channel by encoding the bit stream and rate matching, then modulates, maps and encodes the code word until a time domain waveform is constructed, and simultaneously simulates the fading of the time domain waveform to obtain a simulated signal script according to the fading phenomenon of an actual transmission accompanying signal, because the whole signal generation process is obtained on the basis of a simulation environment, compared with the direct acquisition of an actual transmission signal, the acquisition efficiency of the simulation acquisition signal is obviously improved on the premise of consuming lower material resources, if a large amount of physical signals are required to be acquired to test the block error rate of the channel, if the actual physical signals are used, the test progress of the block error rate is delayed because the actual physical signals need to be acquired, cleaned and the like, if the simulated physical signal is used for replacing the actual physical signal, the simulated physical signal not only consumes lower material resources, but also can be generated in a large amount in a short time, so that the purposes of testing the channel block error rate and the like can be effectively finished; on the other hand, the embodiment of the invention simulates the generation and transmission process of the actual signal, divides the simulation process into bit streams, encodes, modulates, constructs time domain waveforms and other steps to restore the generation and transmission process of the actual signal, can improve the similarity between the simulated physical signal and the actual physical signal, and can effectively utilize the simulated physical signal to replace the actual physical signal.
In addition, the modulating, mapping and encoding the narrowband physical downlink shared channel codeword to obtain a complex symbol includes: scrambling the code words of the narrow-band physical downlink shared channel by using randomized bit data to obtain scrambled code words; modulating the scrambled code word to obtain a modulation symbol; and carrying out layer mapping and precoding on the modulation symbols to obtain the complex symbols.
The embodiment of the invention scrambles the code word of the narrow-band physical downlink shared channel to simulate the condition that the actual signal can be interfered by various transmission factors in the transmission process, improves the similarity between the simulated physical signal and the actual physical signal, simulates the process of transmitting different transmission data to different antenna ports through mapping coding, and avoids the phenomenon that the simulation fails due to the interference of the different transmission data on the same antenna port.
In addition, the obtaining a time domain waveform according to the pre-constructed narrowband reference signal sequence and the complex symbol includes: mapping the narrowband reference signal sequence and the complex symbols to a pre-constructed time-frequency resource map; and modulating the time-frequency resource graph to obtain the time-domain waveform.
The embodiment of the invention constructs the time-frequency resource map, modulates the time-domain waveform through the time-frequency resource map so as to simulate the waveform pattern which is acquired by an instrument and visualized in the actual transmission process of the signal, thereby further perfecting the signal simulation process.
In addition, the performing fading simulation on the time domain waveform to obtain a pseudo-real signal script includes: constructing a fading channel; and transmitting the time domain waveform by using the fading channel to obtain the quasi-real signal script.
According to the embodiment of the invention, the loss process is simulated by using fading simulation according to the phenomenon that the signal is lost when the signal is transmitted in the channel, so that the actual physical signal is simulated vividly.
In addition, after the converting the virtual signal script into the actual physical signal, the method further includes: and testing the block error rate of the pre-constructed channel by using the quasi-physical signal.
The embodiment of the invention applies the generated quasi-physical signal to the block error rate test, thereby solving the dilemma that the block error rate test is limited by the difficulty in obtaining the actual physical signal and cannot achieve the effective test.
In addition, the encoding and rate matching the bit stream to obtain a narrowband physical downlink shared channel codeword includes: adding a cyclic redundancy check code in the bit stream, and carrying out tail-biting convolutional coding to obtain a narrow-band physical downlink shared channel bit; and carrying out rate matching on the narrowband physical downlink shared channel bit to obtain the narrowband physical downlink shared channel code word.
In the embodiment of the invention, as the generated bit stream only represents the basic network speed unit in signal transmission, cyclic redundancy check codes, tail-biting convolutional codes and rate matching are further added to the bit stream to generate signal code words meeting the requirement of channel transmission, the generation process of transmission data before being input into a channel is truly restored, and the simulation accuracy is improved.
In addition, the bitstream is a random bitstream.
In the embodiment of the invention, the bit stream is generally a random bit stream, and the range of the bit stream generated randomly is larger in value, so that the simulated signal is wider in practicability and application scenes.
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One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic flow chart of a signal simulation method according to a first embodiment of the present invention;
fig. 2 is a detailed flowchart of S1 in the signal simulation method according to the first embodiment of the present invention;
fig. 3 is a detailed flowchart of S2 in the signal simulation method according to the first embodiment of the present invention;
fig. 4 is a detailed flowchart of S3 in the signal simulation method according to the first embodiment of the present invention;
fig. 5 is a detailed flowchart of S4 in the signal simulation method according to the first embodiment of the present invention;
FIG. 6 is a block diagram of a signal simulation apparatus according to a second embodiment of the present invention;
fig. 7 is a schematic diagram of an internal structure of an electronic device implementing a signal simulation method according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The invention relates to a signal simulation method, which has the core that a bit stream is simulated to obtain a pseudo-real signal, and the acquisition efficiency of the acquired signal can be improved on the premise of consuming lower material resources according to the simulated acquired signal. The following is a detailed description of the implementation details of the signal simulation of the present embodiment, and the following is only provided for the convenience of understanding and is not necessary for implementing the present embodiment.
Referring to fig. 1, a flowchart of signal simulation in a first embodiment of the present invention is shown in fig. 1, where the flowchart includes:
and S1, generating a bit stream, and coding and rate matching the bit stream to obtain a narrowband physical downlink shared channel code word.
In order to simulate the actual physical signal, a bit stream needs to be generated according to a preset narrowband physical downlink shared channel in the first step, where the narrowband physical downlink shared channel is a physical channel under a narrowband Internet of Things, and the narrowband Internet of Things (NB-IoT) is an Internet of Things technology characterized by low speed, low power consumption and large-scale Internet of Things device connection.
Preferably, the embodiment of the present invention may generate a random bit stream or a fixed-size bit stream, and further, the size of the random bit stream or the fixed-size bit stream should not be larger than the size of the transport block transmitted by the narrowband physical downlink shared channel, which would otherwise affect the transmission of the bit stream in the narrowband physical downlink shared channel. Generally, the maximum Transport Block Size (TBS) transmitted by the narrowband physical downlink shared channel is 2536 bits.
In order to simulate a more real physical signal, the bit stream needs to be encoded and rate-matched in the embodiment of the present invention, so as to obtain a narrowband physical downlink shared channel codeword.
In detail, referring to the detailed flowchart of fig. 2, the encoding and rate matching the bit stream to obtain the narrowband physical downlink shared channel codeword includes:
s11, adding a cyclic redundancy check code in the bit stream, and carrying out tail-biting convolutional coding to obtain a narrowband physical downlink shared channel bit;
the Cyclic Redundancy Check (CRC) code is a commonly used Check code having the capability of error detection and correction, and the addition of the CRC code is mainly used to facilitate subsequent error detection, for example, a 24-bit CRC code is added at the end of a bit stream. The tail-biting convolutional encoding may use a two-step viterbi algorithm, a dual traceback loop viterbi decoding algorithm, etc., which have been disclosed so far.
In the embodiment of the invention, the tail-biting convolutional coding can also be replaced by Manchester coding and differential Manchester coding, so that the narrowband physical downlink shared channel bit is obtained.
S12, carrying out rate matching on the narrow-band physical downlink shared channel bit to obtain the code word of the narrow-band physical downlink shared channel.
The Rate matching refers to puncturing (punctured) narrowband physical downlink shared channel bits on a transport channel to match narrowband physical downlink shared channel bits and a carrying capacity of a narrowband physical downlink shared channel. The puncturing is an operation of dropping the number of bits of the current narrowband physical downlink shared channel bit and sequentially shifting the number of bits of the following narrowband physical downlink shared channel bit forward by one bit.
In the preferred embodiment of the invention, the signal code word which meets the requirement of channel transmission is generated by adding the cyclic redundancy check code, the tail-biting convolutional coding and the rate matching to the bit stream, the generation process of the transmission data before being input into the channel is really restored, and the simulation accuracy is improved.
And S2, modulating, mapping and coding the code word of the narrow-band physical downlink shared channel to obtain a complex symbol.
In the embodiment of the present invention, the modulating and mapping coding of the narrowband physical downlink shared channel codeword may make the narrowband physical downlink shared channel codeword more conform to the transmission property of a physical channel.
In detail, referring to the detailed flowchart of fig. 3, the S2 includes:
s21, scrambling the code word of the narrow-band physical downlink shared channel by using randomized bit data to obtain a scrambled code word;
in the preferred embodiment of the present invention, the size of the randomized bit data is also not larger than the size of the largest transport block of the narrowband physical downlink shared channel.
In the embodiment of the invention, the random bit data can be replaced by the bit data with fixed size, thereby completing scrambling and obtaining the scrambled code word.
The scrambling is a processing method of digital signals, and the randomized bit data can be multiplied by a narrowband physical downlink shared channel code word to obtain the scrambled code word according to the embodiment of the invention. The scrambling code words are re-scattered in both time and frequency compared to the narrowband physical downlink shared channel code words. By scrambling the code words of the narrow-band physical downlink shared channel, the condition that the actual signal is interfered by various transmission factors in the transmission process is simulated, and the similarity between the simulated physical signal and the actual physical signal is improved.
S22, modulating the scrambled code words to obtain modulation symbols;
the embodiment of the invention can adopt a quadrature phase shift keying modulation mode or a differential quadrature phase shift keying modulation mode and the like to modulate the scrambling code words to obtain modulation symbols.
The Quadrature Phase-Shift Keying (QPSK) is a modulation method for transmitting data by conversion or modulation, and mainly uses four Phase points uniformly distributed on the circumference of a constellation diagram, and each scrambling code word is encoded into two bit symbols by the four Phase points. The differential quadrature phase shift keying modulation method is a modulation method improved based on the quadrature phase shift keying modulation method.
And S23, performing layer mapping and precoding on the modulation symbols to obtain complex symbols.
Because the present invention needs to simulate an actual physical signal, and the generation process of the actual physical signal generally involves transmission diversity (transmit diversity), in order to realize the transmission diversity, modulated modulation symbols need to be divided into different transmission layers through layer mapping, and then data in the transmission layers are mapped to antenna ports through precoding, so as to obtain complex symbols.
The precoding is mainly to match data of different transmission layers to antenna ports, and simultaneously reduce interference between data to cause simulation failure. The concept of antenna ports is defined from the point of view of the receiving end of the terminal, and a port is an independent antenna channel for the receiver.
S3, obtaining a time domain waveform according to the pre-constructed narrow-band reference signal sequence and the complex symbol, and carrying out fading simulation on the time domain waveform to obtain a pseudo-real signal script.
In order to further simulate the change of a signal along with time, namely a time domain waveform, the invention needs to utilize a pre-constructed narrow-band reference signal sequence to assist in generating the time domain waveform.
Furthermore, because the general bandwidths of the signals are different, the signals can be divided into two forms, namely narrow-band signals and wide-band signals, the narrow-band signals can be defined by using the relative bandwidths, relative arrays and relative speeds, and the pre-constructed narrow-band reference signal sequence belongs to the narrow-band signals.
In detail, referring to the detailed flowchart of fig. 4, the matching the pre-constructed narrowband reference signal sequence and the complex symbol to obtain the time domain waveform includes:
s31, mapping the narrowband reference signal sequence and the complex symbols to a pre-constructed time-frequency resource map.
In the preferred embodiment of the present invention, the narrowband reference signal sequence and the complex symbols are mapped to a pre-constructed time-frequency resource map according to a preset mapping rule. Preferably, the mapping rule includes avoiding a control region based on a wireless data communication technology, a Cell Reference Signal (CRS) of a narrow-band Reference Signal, and the like during the mapping process.
S32, modulating the time frequency resource graph to obtain the time domain waveform.
The embodiment of the invention utilizes the orthogonal frequency division multiplexing technology or the direct sequence spread spectrum and other modes to modulate the time-frequency resource map to obtain the time-domain waveform.
The Orthogonal Frequency Division Multiplexing (OFDM) technique belongs to one of multicarrier modulation methods, is a modulation method which is disclosed at present and realizes parallel transmission of high-speed serial data through Frequency Division Multiplexing, and has better capability of resisting multipath fading.
Further, since the signal is lost during transmission, which causes signal fading, fading simulation is required after obtaining the time domain waveform.
In detail, the performing fading simulation on the time domain waveform to obtain a pseudo-real signal script includes:
s33, constructing a fading channel;
preferably, the embodiment of the present invention constructs the fading channel by using a pre-constructed fading channel function. In detail, the fading channel function includes adjustable parameters such as delay characteristic, doppler shift, initial phase, path correlation, and the like, and the fading channel is constructed based on a rice channel, a rayleigh channel, and the like.
And S34, transmitting the time domain waveform by using the fading channel to obtain the pseudo-real signal script.
The embodiment of the invention transmits the fading channel as a transmission channel of time domain waveform, thereby obtaining the real-simulated signal script.
And S4, converting the real simulation signal script into a real simulation physical signal.
In the preferred embodiment of the invention, the simulated signal script is led into a pre-constructed signal generator instrument to obtain an actual physical signal, or a pre-constructed simulation program is used for operating the simulated signal script to generate a simulated physical signal.
Furthermore, the generated virtual physical signal can be applied to the block error rate test, so that the dilemma that the current block error rate test is limited by difficulty in acquiring the actual physical signal and cannot achieve effective test is solved. And after the quasi-physical signal is obtained, testing the block error rate of the pre-constructed channel by using the quasi-physical signal.
In the preferred embodiment of the present invention, the actual physical signal can be sent to the receiver terminal in a wired manner by using a coaxial signal line, and when the actual physical signal is successfully received by the receiver terminal, the block error rate of the actual physical signal is analyzed by calling the test module.
In detail, the step of testing the block error rate of the pre-constructed channel by using the quasi-physical signal refers to a detailed flow chart of fig. 5, which includes:
s41, counting the response statistics of the quasi-physical signal in the channel;
and S42, calculating the block error rate index according to the response statistics.
In the preferred embodiment of the present invention, the response statistics can adopt the currently disclosed block error rate test method, such as a vector signal source test method, and after the block error rate index is obtained, a block error rate curve graph can be drawn according to the block error rate index, so that the block error rate can be presented to the user more intuitively.
FIG. 6 is a functional block diagram of the signal simulation apparatus according to the present invention.
The signal simulation apparatus 100 according to the present invention may be installed in an electronic device. According to the realized functions, the signal simulation device may include a code word generation module 101, a complex symbol generation module 102, a pseudo-real signal script generation module 103, and a signal generation module 104. A module according to the present invention, which may also be referred to as a unit, refers to a series of computer program segments that can be executed by a processor of an electronic device and that can perform a fixed function, and that are stored in a memory of the electronic device.
In the present embodiment, the functions regarding the respective modules/units are as follows:
the codeword generating module 101 is configured to generate a bit stream, and encode and rate-match the bit stream to obtain a narrowband physical downlink shared channel codeword.
The complex symbol generating module 102 is configured to modulate, map, and encode the narrowband physical downlink shared channel codeword to obtain a complex symbol.
The pseudo-real signal script generating module 103 is configured to match the pre-constructed narrowband reference signal sequence pair with the complex symbol to obtain a time domain waveform, and perform fading simulation on the time domain waveform to obtain a pseudo-real signal script.
The signal generating module 104 is configured to convert the virtual reality signal script into a virtual reality physical signal. .
The module in the device provided by the embodiment of the invention can be the same as the signal simulation method when in use, a simulated signal script is constructed by carrying out fading simulation on the generated bit stream, and the block error rate test is carried out by combining a receiver terminal, so that the problem of low accuracy of the block error rate test can be solved.
Fig. 7 is a schematic structural diagram of an electronic device implementing the signal simulation method according to the present invention.
The electronic device 1 may comprise a processor 12, a memory 11 and a bus, and may further comprise a computer program, such as a signal emulation program 110, stored in the memory 11 and executable on the processor 12.
The memory 11 includes at least one type of readable storage medium, which includes flash memory, removable hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 11 may in some embodiments be an internal storage unit of the electronic device 1, such as a removable hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the electronic device 1. Further, the memory 11 may also include both an internal storage unit and an external storage device of the electronic device 1. The memory 11 may be used not only to store application software installed in the electronic device 1 and various types of data, such as codes of a signal simulation program, etc., but also to temporarily store data that has been output or is to be output.
The processor 12 may be formed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or may be formed of a plurality of integrated circuits packaged with the same or different functions, including one or more Central Processing Units (CPUs), microprocessors, digital Processing chips, graphics processors, and combinations of various control chips. The processor 12 is a Control Unit (Control Unit) of the electronic device, connects various components of the whole electronic device by using various interfaces and lines, and executes various functions and processes data of the electronic device 1 by running or executing programs or modules (e.g., executing a signal simulation program, etc.) stored in the memory 11 and calling data stored in the memory 11.
The bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. The bus is arranged to enable connection communication between the memory 11 and at least one processor 12 or the like.
Fig. 7 only shows an electronic device with components, and it will be understood by a person skilled in the art that the structure shown in fig. 7 does not constitute a limitation of the electronic device 1, and may comprise fewer or more components than shown, or a combination of certain components, or a different arrangement of components.
For example, although not shown, the electronic device 1 may further include a power supply (such as a battery) for supplying power to each component, and preferably, the power supply may be logically connected to the at least one processor 12 through a power management device, so as to implement functions of charge management, discharge management, power consumption management, and the like through the power management device. The power supply may also include any component of one or more dc or ac power sources, recharging devices, power failure detection circuitry, power converters or inverters, power status indicators, and the like. The electronic device 1 may further include various sensors, a bluetooth module, a Wi-Fi module, and the like, which are not described herein again.
Further, the electronic device 1 may further include a network interface, and optionally, the network interface may include a wired interface and/or a wireless interface (such as a WI-FI interface, a bluetooth interface, etc.), which are generally used for establishing a communication connection between the electronic device 1 and other electronic devices.
Optionally, the electronic device 1 may further comprise a user interface, which may be a Display (Display), an input unit (such as a Keyboard), and optionally a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, or the like. The display, which may also be referred to as a display screen or display unit, is suitable for displaying information processed in the electronic device 1 and for displaying a visualized user interface, among other things.
It is to be understood that the described embodiments are for purposes of illustration only and that the scope of the appended claims is not limited to such structures.
The signal simulation program 110 stored in the memory 11 of the electronic device 1 is a combination of a plurality of instructions, and when running in the processor 12, the same technical implementation means as the above method items can be implemented, which is not described herein again.
Further, the integrated modules/units of the electronic device 1, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. The computer-readable medium may include: any entity or device capable of carrying said computer program code, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM).
The computer-readable storage medium has stored thereon a signal emulation program that is executable by one or more processors to:
generating a bit stream, and coding and rate matching the bit stream to obtain a narrowband physical downlink shared channel code word;
modulating, mapping and coding the code word of the narrow-band physical downlink shared channel to obtain a complex symbol;
obtaining a time domain waveform according to a pre-constructed narrowband reference signal sequence and the complex symbols, and performing fading simulation on the time domain waveform to obtain a pseudo-real signal script;
and converting the virtual real signal script into a virtual real physical signal.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus, device and method can be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and other divisions may be realized in practice.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional module.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.
The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.
Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A method for signal simulation, the method comprising:
generating a bit stream, and coding and rate matching the bit stream to obtain a narrowband physical downlink shared channel code word;
modulating, mapping and coding the code word of the narrow-band physical downlink shared channel to obtain a complex symbol;
obtaining a time domain waveform according to a pre-constructed narrowband reference signal sequence and the complex symbols, and performing fading simulation on the time domain waveform to obtain a pseudo-real signal script;
and converting the virtual real signal script into a virtual real physical signal.
2. The signal simulation method of claim 1, wherein the modulating and mapping the narrowband physical downlink shared channel codeword to obtain a complex symbol comprises:
scrambling the code words of the narrow-band physical downlink shared channel by using randomized bit data to obtain scrambled code words;
modulating the scrambled code word to obtain a modulation symbol;
and carrying out layer mapping and precoding on the modulation symbols to obtain the complex symbols.
3. The signal simulation method of claim 1, wherein the obtaining a time domain waveform according to the pre-constructed narrowband reference signal sequence and the complex symbol comprises:
mapping the narrowband reference signal sequence and the complex symbols to a pre-constructed time-frequency resource map;
and modulating the time-frequency resource graph to obtain the time-domain waveform.
4. The signal simulation method of claim 1, wherein the performing fading simulation on the time domain waveform to obtain a pseudo-real signal script comprises:
constructing a fading channel;
and transmitting the time domain waveform by using the fading channel to obtain the quasi-real signal script.
5. The signal emulation method of claim 1, wherein the encoding and rate matching the bit stream to obtain a narrowband physical downlink shared channel codeword comprises:
adding a cyclic redundancy check code in the bit stream, and carrying out tail-biting convolutional coding to obtain a narrow-band physical downlink shared channel bit;
and carrying out rate matching on the narrowband physical downlink shared channel bit to obtain the narrowband physical downlink shared channel code word.
6. The signal emulation method of any one of claims 1 to 5, wherein the bitstream is a random bitstream.
7. The signal simulation method of claim 1, wherein after converting the real-like signal script into a real-like physical signal, further comprising:
and testing the block error rate of the pre-constructed channel by using the quasi-physical signal.
8. A signal emulation apparatus, comprising:
the code word generating module is used for generating a bit stream, coding the bit stream and carrying out rate matching to obtain a narrow-band physical downlink shared channel code word;
a complex symbol generating module, configured to modulate and map-code the narrowband physical downlink shared channel codeword to obtain a complex symbol;
the quasi-real signal script generation module is used for obtaining a time domain waveform according to a pre-constructed narrowband reference signal sequence and the complex symbols, and carrying out fading simulation on the time domain waveform to obtain a quasi-real signal script;
and the signal generation module is used for converting the real-simulated signal script into an actual physical signal.
9. An electronic device, characterized in that the electronic device comprises:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a signal simulation method according to any one of claims 1 to 7.
10. A computer-readable storage medium storing at least one instruction which, when executed by a processor, implements a signal simulation method according to any one of claims 1 to 7.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515844A (en) * | 2009-01-20 | 2009-08-26 | 重庆无线绿洲通信技术有限公司 | Efficient multi-user multielement parallel transmission method and device |
| EP2330843A1 (en) * | 2009-12-03 | 2011-06-08 | Nomor Research GmbH | Apparatus and method for providing a control signal |
| US20140313994A1 (en) * | 2011-09-01 | 2014-10-23 | China Academy Of Telecommunications Technology | Method and device for transmitting downlink control information |
| CN105827381A (en) * | 2015-01-26 | 2016-08-03 | 苹果公司 | Receiver Architecture with Analog Complex Filter for OFDMA Reception |
| CN106879000A (en) * | 2017-04-28 | 2017-06-20 | 北京科技大学 | A kind of LTE A system integration project platforms |
| WO2017114350A1 (en) * | 2015-12-28 | 2017-07-06 | 夏普株式会社 | Multiplexing method for narrowband internet of things physical downlink channel, and base station and user equipment |
| US20180091341A1 (en) * | 2016-09-27 | 2018-03-29 | Qualcomm Incorporated | Methods and apparatus for using synchronization signals as reference for demodulating multi-port broadcast channel |
| WO2018063845A1 (en) * | 2016-09-29 | 2018-04-05 | Intel IP Corporation | Support of frequency hopping with different number of physical resource blocks in different hopped frequency regions |
| CN108768583A (en) * | 2018-03-30 | 2018-11-06 | 重庆邮电大学 | A kind of data source analog platform based on LTE-A |
| CN110808752A (en) * | 2018-08-06 | 2020-02-18 | 黎光洁 | Communication method and system of Internet of things |
| CN111130696A (en) * | 2019-12-19 | 2020-05-08 | 重庆邮电大学 | Downlink simulation platform based on 5G terminal simulator |
-
2020
- 2020-08-04 CN CN202010770609.2A patent/CN111954244B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515844A (en) * | 2009-01-20 | 2009-08-26 | 重庆无线绿洲通信技术有限公司 | Efficient multi-user multielement parallel transmission method and device |
| EP2330843A1 (en) * | 2009-12-03 | 2011-06-08 | Nomor Research GmbH | Apparatus and method for providing a control signal |
| US20140313994A1 (en) * | 2011-09-01 | 2014-10-23 | China Academy Of Telecommunications Technology | Method and device for transmitting downlink control information |
| CN105827381A (en) * | 2015-01-26 | 2016-08-03 | 苹果公司 | Receiver Architecture with Analog Complex Filter for OFDMA Reception |
| WO2017114350A1 (en) * | 2015-12-28 | 2017-07-06 | 夏普株式会社 | Multiplexing method for narrowband internet of things physical downlink channel, and base station and user equipment |
| US20180091341A1 (en) * | 2016-09-27 | 2018-03-29 | Qualcomm Incorporated | Methods and apparatus for using synchronization signals as reference for demodulating multi-port broadcast channel |
| WO2018063845A1 (en) * | 2016-09-29 | 2018-04-05 | Intel IP Corporation | Support of frequency hopping with different number of physical resource blocks in different hopped frequency regions |
| CN106879000A (en) * | 2017-04-28 | 2017-06-20 | 北京科技大学 | A kind of LTE A system integration project platforms |
| CN108768583A (en) * | 2018-03-30 | 2018-11-06 | 重庆邮电大学 | A kind of data source analog platform based on LTE-A |
| CN110808752A (en) * | 2018-08-06 | 2020-02-18 | 黎光洁 | Communication method and system of Internet of things |
| CN111130696A (en) * | 2019-12-19 | 2020-05-08 | 重庆邮电大学 | Downlink simulation platform based on 5G terminal simulator |
Non-Patent Citations (3)
| Title |
|---|
| NHAT-QUANG NHAN ET.AL: ""Optimized MIMO symbol mapping to improve the turbo cliff region of iterative precoded MIMO detection"", 《2015 23RD EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO)》, 28 December 2015 (2015-12-28) * |
| 王美乐;张治中;王光亚;: "LTE-A空口监测分析仪中PDSCH解资源映射的设计与实现", 计算机应用, no. 10 * |
| 罗浩: ""宽带集群通信系统上行物理信道研究及实现"", 《中国优秀博硕士学位论文全文数据库（硕士）》, 15 January 2020 (2020-01-15) * |
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