CN110086525B - Performance index evaluation method and device of S-band satellite mobile communication system - Google Patents
Performance index evaluation method and device of S-band satellite mobile communication system Download PDFInfo
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Abstract
The embodiment of the invention provides a performance index evaluation method and a performance index evaluation device of an S-band satellite mobile communication system, wherein the method comprises the following steps: receiving satellite signals through a satellite automatic tracking antenna; obtaining a characteristic parameter value of a characteristic parameter related to the satellite signal; acquiring an original signal; performing communication processing on the original signal to obtain and send a processed signal; performing channel fitting according to the characteristic parameter values, establishing a simulation channel, and transmitting the processed signal through the simulation channel; restoring the transmitted processed signal to obtain a restored signal; and evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal.
Description
Technical Field
The invention relates to the field of satellite communication, in particular to a performance index evaluation method and device of an S-band satellite mobile communication system.
Background
Compared with a ground communication system, the satellite communication system has the characteristics of high manufacturing cost, complex structure, difficulty in changing and the like, so that before the satellite communication system is designed, simulation software is required to perform simulation on the satellite communication system to determine the performance index of the satellite communication system.
The satellite mobile communication system in the existing satellite communication system has the characteristics of both satellite communication and mobile communication, so that the satellite mobile communication system is superior to other communication means, the real-time, flexible and efficient communication quality is ensured, and the satellite mobile communication system is widely applied to various communication fields.
The performance index evaluation method of the satellite mobile communication system in the related art is realized by the following steps: the simulation channels of general communication obey Gaussian, Rayleigh and other distributions, and the corresponding satellite mobile communication system mainly comprises the simulation channels established by the established mathematical formula mode and transmits signals through the simulation channels; after recovery processing is carried out on the transmitted signals, recovery signals are obtained; determining an error value between the recovered signal and the original signal; under the condition that the error amount is larger than a first preset value, evaluating the performance index of the satellite mobile communication system; and under the condition that the error amount is less than a second preset amount, evaluating the performance index of the satellite mobile communication system, wherein the first preset value and the second preset value can be respectively set according to the requirements of users.
Although the method realizes the evaluation of the performance index of the satellite mobile communication system, the inventor of the present application finds that the performance index evaluation method of the satellite mobile communication system in the related art has the following problems in the process of implementing the present invention:
because the simulation channel habit of the performance index evaluation method of the satellite mobile communication system in the related technology adopts an idealized distribution model, such as Gaussian distribution, Rayleigh distribution and the like, and the noise conforms to specific distribution, the specific distribution does not conform to the actual situation of the satellite, so that the simulation is deviated from the real situation, and the accuracy of the simulation evaluation result is reduced.
Disclosure of Invention
The embodiment of the invention aims to provide a performance index evaluation method and a performance index evaluation device of an S-band satellite mobile communication system, which are used for solving the problems that simulation deviates from the real situation and the accuracy of a simulation evaluation result is reduced because the simulation channel habit of the performance index evaluation device of the satellite mobile communication system in the prior art adopts an idealized distribution model and the specific distribution of noise does not accord with the actual situation of a satellite. The specific technical scheme is as follows:
in a first aspect, the present invention provides a performance index evaluation method for an S-band satellite mobile communication system, where the method includes:
receiving satellite signals through a satellite automatic tracking antenna;
obtaining a characteristic parameter value of a characteristic parameter related to the satellite signal;
acquiring an original signal; performing communication processing on the original signal to obtain and send a processed signal;
performing channel fitting according to the characteristic parameter values, establishing a simulation channel, and transmitting the processed signal through the simulation channel;
restoring the transmitted processed signal to obtain a restored signal;
and evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal.
Further, the receiving the satellite signal through the satellite automatic tracking antenna includes:
receiving each satellite signal under different propagation environments through a satellite automatic tracking antenna;
the obtaining of the characteristic parameter value of the characteristic parameter related to the satellite signal includes:
obtaining a characteristic parameter value of a characteristic parameter related to each satellite signal as each characteristic parameter value;
the channel fitting is performed through the characteristic parameter values, a simulation channel is established, and the processed signal is transmitted through the simulation channel, and the method comprises the following steps:
performing channel fitting in parallel through the characteristic parameter values, establishing a plurality of simulation channels, and transmitting the processed signals in parallel through the simulation channels, wherein each simulation channel in the simulation channels comprises: characteristic parameter values corresponding to the simulation channels;
the recovering processing of the processed signal after transmission to obtain a recovered signal includes:
carrying out recovery processing on the transmitted processed signals in parallel to obtain recovery signals;
the evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal comprises the following steps: and evaluating the performance indexes of the S-band satellite mobile communication system under different propagation environments based on the recovery signal.
Further, the performing communication processing on the original signal to obtain and send a processed signal includes:
selecting a target communication processing mode from a preset module pool, wherein the preset module pool comprises: each communication processing mode pool, which comprises: more than two of an encoding pool, a modulation pool, a multiplexing pool and an interweaving pool;
and performing communication processing on the original signal through the target communication processing mode to obtain and send a processed signal.
Further, the method further comprises:
after the performance index of the S-band satellite mobile communication system is evaluated, the data and the characteristic parameter values of the performance index of the S-band satellite mobile communication system are stored.
In a second aspect, the present invention provides an apparatus for evaluating performance indicators of an S-band satellite mobile communication system, including:
the semi-physical parameter acquisition module is used for receiving satellite signals through the satellite automatic tracking antenna; obtaining a characteristic parameter value of a characteristic parameter related to the satellite signal;
the transmitting module is used for acquiring an original signal; performing communication processing on the original signal to obtain and send a processed signal to a simulation channel establishing module;
the simulation channel establishing module is used for performing channel fitting through the characteristic parameter values, establishing a simulation channel and transmitting the processed signal through the simulation channel;
the receiving module is used for receiving the processed signal transmitted by the simulation channel and recovering the transmitted processed signal to obtain a recovered signal; and evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal.
Further, the semi-physical parameter obtaining module is configured to receive each satellite signal in different propagation environments through a satellite automatic tracking antenna; obtaining a characteristic parameter value of a characteristic parameter related to each satellite signal as each characteristic parameter value;
the simulation channel establishing module is configured to perform channel fitting in parallel according to the characteristic parameter values, establish a plurality of simulation channels, and transmit the processed signals in parallel through the plurality of simulation channels, where each simulation channel in the plurality of simulation channels includes: characteristic parameter values corresponding to the simulation channels;
the receiving module is used for receiving the processed signals transmitted by the plurality of simulation channels in parallel and recovering the transmitted processed signals in parallel to obtain recovered signals; and evaluating the performance indexes of the S-band satellite mobile communication system under different propagation environments based on the recovery signal.
Further, the sending module is configured to:
acquiring an original signal;
selecting a target communication processing mode from a preset module pool, wherein the preset module pool comprises: each communication processing mode pool;
and performing communication processing on the original signal through the target communication processing mode to obtain and send a processed signal.
Further, the apparatus further comprises:
and the data storage module is used for storing the data and the characteristic parameter values of the performance indexes of the S-waveband satellite mobile communication system after the performance indexes of the S-waveband satellite mobile communication system are evaluated.
In a third aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor and the communication interface complete communication between the memory and the processor through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of the first aspect when executing the program stored in the memory.
In a fourth aspect, the present invention provides a computer-readable storage medium having stored thereon instructions which, when run on a computer, cause the computer to perform the method of any of the first aspects described above.
The embodiment of the invention provides a performance index evaluation method and device of an S-band satellite mobile communication system. The characteristic parameters related to the satellite signals are obtained through the satellite automatic tracking antenna and belong to measured data, so that the characteristic parameter values of the characteristic parameters related to the satellite signals are obtained through measurement, a simulation channel is established and is closer to a real channel of a satellite mobile communication system, and further, the simulation evaluation result is closer to the real situation of the satellite mobile communication system.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a performance index evaluation method of an S-band satellite mobile communication system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a performance index evaluation apparatus of an S-band satellite mobile communication system according to an embodiment of the present invention;
FIG. 3 is a block diagram of a high level architecture system according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an application of the performance index estimation method of the S-band satellite mobile communication system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the problems that the simulation channel habit of the performance index evaluation device of the satellite mobile communication system in the prior art adopts an idealized distribution model, and the specific distribution of noise does not conform to the actual situation of the satellite, so that simulation deviates from the real situation, and the accuracy of the simulation evaluation result is reduced, the embodiment of the invention provides the performance index evaluation method and the performance index evaluation device of the S-band satellite mobile communication system. The characteristic parameters related to the satellite signals are obtained through the satellite automatic tracking antenna and belong to measured data, so that the characteristic parameter values of the characteristic parameters related to the satellite signals are obtained through measurement, a simulation channel is established and is closer to a real channel of a satellite mobile communication system, and further, the simulation evaluation result is closer to the real situation of the satellite mobile communication system.
First, a method for evaluating performance indexes of an S-band satellite mobile communication system according to an embodiment of the present invention is described below.
The performance index evaluation method of the S-band satellite mobile communication system provided by the embodiment of the invention is applied to electronic equipment, wherein the electronic equipment can realize the performance index evaluation method of the S-band satellite mobile communication system in the embodiment of the invention through simulation.
As shown in fig. 1, an embodiment of the present invention further provides a performance index evaluation method for an S-band satellite mobile communication system, where the method includes:
The characteristic parameters related to the satellite signals may include, but are not limited to: one or more of an envelope of the satellite signal, a phase of the satellite signal, a pitch angle of the satellite signal.
Among them, the communication process may include but is not limited to: two or more of encoding, modulation, multiplexing, and interleaving, which are not limited herein. The actual execution order of these communication processes conforms to the actual communication requirements.
And 140, performing channel fitting through the characteristic parameter values, establishing a simulation channel, and transmitting the processed signal through the simulation channel.
The present step 140 may employ a c.loo model, since the probability density of the envelope r of the processed signal is
Wherein f isr(r) represents the probability density of the envelope r of the processed signal, r represents the envelope of the processed signal, b0Representing the average scattered multipath power, z representing the direct signal, d0Denotes the variance of lnz, μ denotes the mean of lnz, I0Representing a first class of zero-order modified Bessel functions;
the step 140 further includes: the simulation channel is established by fitting a channel through the characteristic parameter values, wherein the channel fitting is for the optimization problem, and the channel fitting can be curve fitting, that is, the objective function is composed of the square sum of a plurality of functions, so f (x) can be expressed as
Wherein F (b, d, μ) represents the objective function obtained by fitting, yiFor the probability distribution of the processed signal, b, d, μ are the fitting parameters of the model, riAs envelope value of the signal, riOne sample in r. The function is a non-linear function and is therefore fitted using a non-linear least squares method.
The idea of the nonlinear least square method is to convert the nonlinear least square method problem into a linear least square method problem and solve the problem by iteration. Taking F (x) as an example, the solving process is as follows:
initial iteration points: x is the number of1K is 1, wherein x represents the parameter to be fitted, and k represents the number of iterations;
first step, linearization: handle fi(x) Where x is xkTaking the Taylor expansion, the function after omitting the high-order term is recorded as
At this time
Is fi(x) Where x is xkCan approximately represent a linear function offi(x) Wherein f isi(x) Representing a non-linear function with respect to x, xkThe k-th iteration of x is represented,
after f denotes the omission of higher-order termsi(x) Taylor first order approximation expansion.
Step two, derivation: all the non-linear terms in F (x) are converted into linear terms, and further converted into a linear least square problem, so that
By using
Approximately f (x). To pair
Make a derivative of
Solving x to obtain the next optimal point x ═ xk+1(iteration is one step closer in the direction of the decrease in the value of f (x)), and then, based on the new optimum point, let f (x) be equal to xk+1And (4) performing Taylor expansion and circularly performing the two steps. In the formation of fi(x) After the first order approximation, a first order approximation of F (x) can be calculated, which is
xk+1Denotes the (k + 1) th iteration of x, and F (x) denotes the objective function.
Iteration stop conditions: more than one iteration stop condition, e.g. up to xk+1-xk< threshold, consider xk+1F (x) is brought to near the minimum value and the iteration is stopped. Where this threshold determines the x estimation accuracy and the number of iterations of the optimization process. This threshold may be set according to user requirements.
among them, the recovery process may include, but is not limited to: two or more of decoding, demodulating, demultiplexing, and deinterleaving, which are not limited herein. The actual execution order of these restoration processes conforms to the actual communication demand, and the actual execution order of the restoration processes is the same as the actual execution order of the communication processes.
And step 160, evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal.
In the embodiment of the invention, the satellite signal is received through the satellite automatic tracking antenna, the characteristic parameter value of the characteristic parameter related to the satellite signal is obtained, and the channel fitting is carried out through the characteristic parameter value to establish the simulation channel. The characteristic parameters related to the satellite signals are obtained through the satellite automatic tracking antenna and belong to measured data, so that the characteristic parameter values of the characteristic parameters related to the satellite signals are obtained through measurement, a simulation channel is established and is closer to a real channel of a satellite mobile communication system, and further, the simulation evaluation result is closer to the real situation of the satellite mobile communication system.
In order to provide different channels for an S-band satellite mobile communication system, and effectively improve the efficiency of the S-band satellite mobile communication system through a parallel computing manner, in one possible implementation manner, the receiving a satellite signal through a satellite automatic tracking antenna includes:
receiving each satellite signal under different propagation environments through a satellite automatic tracking antenna;
the obtaining of the characteristic parameter value of the characteristic parameter related to the satellite signal includes:
obtaining a characteristic parameter value of a characteristic parameter related to each satellite signal as each characteristic parameter value;
the channel fitting is performed through the characteristic parameter values, a simulation channel is established, and the processed signal is transmitted through the simulation channel, and the method comprises the following steps:
performing channel fitting in parallel through the characteristic parameter values, establishing a plurality of simulation channels, and transmitting the processed signals in parallel through the simulation channels, wherein each simulation channel in the simulation channels comprises: characteristic parameter values corresponding to the simulation channels;
the recovering processing of the processed signal after transmission to obtain a recovered signal includes:
carrying out recovery processing on the transmitted processed signals in parallel to obtain recovery signals;
the evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal comprises the following steps: and evaluating the performance indexes of the S-band satellite mobile communication system under different propagation environments based on the recovery signal.
In the embodiment of the invention, the satellite signal is received through the satellite automatic tracking antenna, the characteristic parameter value of the characteristic parameter related to the satellite signal is obtained, and the channel fitting is carried out in parallel through the characteristic parameter value to establish a plurality of simulation channels. The characteristic parameters related to the satellite signals are obtained through the satellite automatic tracking antenna and belong to measured data, so that the characteristic parameter values of the characteristic parameters related to the satellite signals are obtained through measurement, a simulation channel is established and is closer to a real channel of a satellite mobile communication system, and further, the simulation evaluation result is closer to the real situation of the satellite mobile communication system. In addition, different channels can be provided for the S-band satellite mobile communication system, and the efficiency of the S-band satellite mobile communication system can be effectively improved through a parallel computing mode.
In order to meet different requirements of users, such as different scenes and different coding modes, any scene can be simulated; or, which is better than the user's needs may be compared in multiple ways, and the evaluation result is more ready, and in a possible implementation, the performing communication processing on the original signal to obtain and send a processed signal includes:
selecting a target communication processing mode from a preset module pool, wherein the preset module pool comprises: each communication processing mode pool, which comprises: more than two of the coding pool, the modulation pool, the multiplexing pool and the interweaving pool.
The target communication processing mode may be a communication processing mode determined from a preset module pool. For example, the target communication processing method may be a target coding method, a target modulation method, a target multiplexing method, and a target interleaving method, which is not limited herein. The preset module pool can be used for storing each communication mode. In the module pooling processing of the communication processing function, the description information of each communication processing is uniformly stored by the preset module pool and is periodically maintained and updated, so that the method can be suitable for different satellite protocols, and corresponding modules are selected from the preset module pool to be simulated according to protocol requirements.
The encoding pool may include, but is not limited to: the method includes a source coding pool and a channel coding pool, the source coding pool includes Advanced Multi-Band Excitation (AMBE for short), Algebraic codebook Excited Linear Prediction (ACELP for short), audio coding standard g.721, and the channel coding pool may include, but is not limited to: the modulation pool may include, but is not limited to, Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), 8 Quadrature Phase Shift Keying (8 PSK), Quadrature relative Phase Shift Keying (DQPSK), Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank (Filter Bank-Shift Keying, FBMC), and the like, and may include, but is not limited to, a random matrix mc, a random Redundancy Check (CRC) and the like, The multiplexing pool may include, but is not limited to, Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), and other multiplexing methods. Thus, modules such as coding, modulation, interleaving, multiplexing and the like are subjected to pooling processing, and different simulation parameters can be selected from a preset module pool to realize simulation of satellites following different protocols.
And performing communication processing on the original signal through the target communication processing mode to obtain and send a processed signal. Therefore, the communication processing of different scenes and different coding modes can be completed according to the target communication processing mode.
In order to implement direct automatic storage of data for simulation, in one possible implementation, the method further includes:
after the performance index of the S-band satellite mobile communication system is evaluated, the data and the characteristic parameter values of the performance index of the S-band satellite mobile communication system are stored.
The data of the performance index of the S-band satellite mobile communication system may refer to all data in the process of evaluating the performance index of the S-band satellite mobile communication system, which is not limited herein.
In a second aspect, a description is continued below of a performance index evaluation apparatus for an S-band satellite mobile communication system according to an embodiment of the present invention.
As shown in fig. 2, an apparatus for evaluating performance index of S-band satellite mobile communication system according to an embodiment of the present invention includes:
a semi-physical parameter obtaining module 11, configured to receive a satellite signal through a satellite automatic tracking antenna, and obtain a characteristic parameter value of a characteristic parameter related to the satellite signal, where the obtaining of the characteristic parameter value of the characteristic parameter related to the satellite signal may include, but is not limited to: characteristic parameter values of the satellite signal characteristic parameters and characteristic parameter values of the antenna characteristic parameters; the satellite signal characteristic parameters may include, but are not limited to: envelope and phase information of the satellite signal; the antenna characteristic parameters may include, but are not limited to: elevation information of the antenna.
The embodiment of the invention can realize the acquisition of the characteristic parameter value of the characteristic parameter related to the satellite signal, and the embodiment of the invention can use a measurement module. That is, the semi-physical parameter obtaining module 11 is configured to receive a satellite signal through a satellite automatic tracking antenna; calculating characteristic parameter values of envelope and phase information of the satellite signals by adopting an envelope extraction method and a phase extraction method; and reading the elevation angle information of the antenna to obtain the characteristic parameter value of the elevation angle information of the antenna. Therefore, the characteristic parameter values of the characteristic parameters related to the satellite signals can be conveniently obtained, the final result can be quickly and accurately obtained, and a judgment basis for selecting proper parameters is provided for actual engineering and practice.
A sending module 12, configured to obtain an original signal; and carrying out communication processing on the original signal to obtain and send a processed signal to the simulation channel establishing module.
Among them, the communication process may include but is not limited to: two or more of encoding, modulation, multiplexing, and interleaving, which are not limited herein. The actual execution sequence of these communication processes conforms to the actual communication requirements, for example, the sending module 12 is used to obtain the original signal; and sequentially coding, modulating, multiplexing and interleaving the original signal to obtain and send a processed signal to the simulation channel establishing module. This allows a better adaptation of the original signal to the channel to be transmitted, and thus a better transmission of the original signal.
The sending module 12 has various acquiring manners for acquiring the original signal, which are not limited herein, such as: and acquiring a random number, and generating an original signal by the random number. Therefore, the content of the original signal is simple, and the influence of the original signal on the S-band satellite mobile communication system is small.
And the simulation channel establishing module 13 is configured to perform channel fitting according to the characteristic parameter values, establish a simulation channel, and transmit the processed signal through the simulation channel. Since the simulation channel establishing module 13 is configured to perform channel fitting through the characteristic parameter values, it is indicated that the simulation channel establishing module 13 acquiesces to obtain the characteristic parameter values and performs channel fitting through the characteristic parameter values.
A receiving module 14, configured to receive the processed signal transmitted by the emulation channel, and perform recovery processing on the processed signal after transmission to obtain a recovery signal; and evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal.
Among them, the recovery process may include, but is not limited to: two or more of decoding, demodulating, demultiplexing, and deinterleaving, which are not limited herein. The actual execution sequence of the recovery processing conforms to the actual communication requirement, and the actual execution sequence of the recovery processing is the same as the actual execution sequence of the communication processing, for example, the receiving module 14 is configured to receive the processed signal transmitted by the simulation channel, and sequentially decode, demodulate, demultiplex, and deinterleave the transmitted processed signal to obtain a recovery signal; and evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal. Therefore, the signals can be recovered from the simulation channel more accurately to obtain recovered signals.
In order to enable the performance index of the S-band satellite mobile communication system to be evaluated, the receiving module 14 according to the embodiment of the present invention is configured to evaluate the performance index of the S-band satellite mobile communication system based on the recovered signal in any evaluable manner. For example, based on the recovered signal, an error value between the recovered signal and the original signal is determined; under the condition that the error amount is larger than a preset value, evaluating the performance index of the satellite mobile communication system; and under the condition that the error amount is less than the preset number, evaluating the performance index of the satellite mobile communication system.
For another example, the performance index of the satellite mobile communication system is evaluated based on the error rate of the recovered signal. Therefore, the error rate can be conveniently used, and the performance index of the satellite mobile communication system can be evaluated. For example, the receiving module 14 is configured to display an error rate curve of the recovered signal based on the error rate of the recovered signal, and evaluate a performance index of the satellite mobile communication system. Therefore, the curve of the bit error rate is observed more intuitively, and the performance index of the satellite mobile communication system is evaluated.
In the embodiment of the invention, a semi-physical parameter obtaining module receives a satellite signal through a satellite automatic tracking antenna to obtain a characteristic parameter value of a characteristic parameter related to the satellite signal, and a simulation channel establishing module performs channel fitting through the characteristic parameter value to establish a simulation channel. The characteristic parameters related to the satellite signals are obtained through the satellite automatic tracking antenna and belong to measured data, so that the characteristic parameter values of the characteristic parameters related to the satellite signals are obtained through measurement, a simulation channel is established and is closer to a real channel of a satellite mobile communication system, and further, the simulation evaluation result is closer to the real situation of the satellite mobile communication system.
In order to provide different channels for an S-band satellite mobile communication system and effectively improve the efficiency of the S-band satellite mobile communication system through a parallel computing manner, an embodiment of the present invention further provides a performance index evaluation device for the S-band satellite mobile communication system, where the device may include:
a semi-physical parameter obtaining module 11, configured to receive each satellite signal in different propagation environments through a satellite auto-tracking antenna; obtaining a characteristic parameter value of a characteristic parameter related to each satellite signal as each characteristic parameter value;
an emulation channel establishing module 13, configured to perform channel fitting in parallel according to the characteristic parameter values, establish a plurality of emulation channels, and transmit the processed signal in parallel through the plurality of emulation channels, where each emulation channel in the plurality of emulation channels includes: characteristic parameter values corresponding to the simulated channels.
In order to improve the efficiency of establishing the simulation channel, since the simulation channel establishing module 13 is configured to perform channel fitting in parallel by using the characteristic parameter values, the simulation channel establishing module 13 may obtain the characteristic parameter values in parallel by default, and perform parallel channel fitting by using the characteristic parameter values.
The sending module 12 may be configured to obtain an original signal; the original signal is subjected to communication processing, a processed signal or a plurality of processed signals are obtained and sent to the simulation channel establishing module in parallel, and under the condition that the sending module 12 sends a processed signal, all simulation channel establishing modules used for establishing simulation channel parallel processing can be used for using one processed signal for multiple times, so that the simulation channel establishing module can comprise a storage module used for storing the received processed signal. Thus, the transmission module 12 can reduce the processing load of the S-band satellite mobile communication system without transmitting a plurality of original signals.
A receiving module 14, configured to receive the processed signals transmitted by the multiple simulation channels in parallel, and perform recovery processing on the transmitted processed signals in parallel to obtain recovery signals; and evaluating the performance indexes of the S-band satellite mobile communication system under different propagation environments based on the recovery signal.
The steps of implementing the parallelism of the modules of the semi-physical parameter obtaining module 11, the sending module 12, the simulation channel establishing module 13 and the receiving module 14 can be implemented by each module, or each module can be provided with a computing unit, that is, each module comprises a computing unit, the parallel process of each module is implemented by the computing unit of each module, the system efficiency is effectively improved by a parallel computing mode, the computing efficiency of the whole S-band satellite mobile communication system is effectively improved, and the related technical indexes of different channels can be obtained in the same time.
The computing units of each module can form a parallel computing layer, the computing module can comprise different propagation scenes and different noise addition algorithms, different channels are provided for the S-band satellite mobile communication system, and the efficiency of the S-band satellite mobile communication system can be effectively improved through a parallel computing mode. The processing capability of a multi-core computer can be fully exerted by utilizing a Computing unit of a Parallel Computing layer, namely a Parallel Computing toolkit Parallel Computing Toolbox, the same application software can be operated on a computer cluster or grid Computing service without changing codes, different characteristic parameters are selected from the application software for synchronous simulation, and bit error rate (BER for short) results of an S-band satellite mobile communication system under different simulation channels can be obtained simultaneously.
The above-mentioned sending module, the simulation channel establishing module and the receiving module may be implemented in parallel by any one module, may also be implemented in parallel by any two modules, and may also be implemented in parallel by three modules, which is determined according to the actual situation and will not be described in detail herein.
In the embodiment of the invention, the semi-physical parameter obtaining module receives satellite signals through the satellite automatic tracking antenna to obtain characteristic parameter values of characteristic parameters related to the satellite signals, and the simulation channel establishing module performs channel fitting in parallel through the characteristic parameter values to establish a plurality of simulation channels. The characteristic parameters related to the satellite signals are obtained through the satellite automatic tracking antenna and belong to measured data, so that the characteristic parameter values of the characteristic parameters related to the satellite signals are obtained through measurement, a simulation channel is established and is closer to a real channel of a satellite mobile communication system, and further, the simulation evaluation result is closer to the real situation of the satellite mobile communication system. In addition, different channels can be provided for the S-band satellite mobile communication system, and the efficiency of the S-band satellite mobile communication system can be effectively improved through a parallel computing mode.
In order to meet different requirements of users, such as different scenes and different coding modes, any scene can be simulated; or, which is better than the user's requirement may be compared in various ways, and the evaluation result is more prepared, where the sending module 12 in the embodiment of the present invention is configured to:
acquiring an original signal; selecting a target communication processing mode from a preset module pool; performing communication processing on the original signal through the target communication processing mode to obtain and send a processed signal, wherein the preset module pool comprises: each communication processing mode pool, which comprises: more than two of the coding pool, the modulation pool, the multiplexing pool and the interweaving pool.
Illustratively, the user needs to use a plurality of communication processing modes, and the sending module 12 is specifically configured to obtain a random number as an original signal; selecting a target coding mode, a target modulation mode, a target multiplexing mode and a target interleaving mode from a preset module pool, wherein the preset module pool comprises: each coding mode, each modulation mode, each multiplexing mode and each interleaving mode; and sequentially coding, modulating, multiplexing and interleaving the original signal by more than two of the target coding mode, the target modulation mode, the target multiplexing mode and the target interleaving mode to obtain a processed signal, and sending the processed signal. Therefore, the communication processing of different scenes and different coding modes can be completed according to the target communication processing mode.
In order to realize direct automatic storage of simulation data, an embodiment of the present invention further provides a performance index evaluation device for an S-band satellite mobile communication system, where the device may further include:
and the data storage module is used for storing the data and the characteristic parameter values of the performance indexes of the S-waveband satellite mobile communication system after the performance indexes of the S-waveband satellite mobile communication system are evaluated.
The data storage module can be a simulation data storage database, and can realize direct automatic storage of simulation data through a collaborative simulation architecture and a Real-Time Interface (RTI for short).
Referring to fig. 3, an embodiment of the present invention further provides a High Level Architecture (HLA) system, where the HLA system includes: in the performance index evaluation device of the S-band satellite mobile communication system, the preset module pool may form a simulation application layer 21.
The high-level architecture HLA system further comprises: an adapter for a generic RTI service; the adapter is also used for the general API service of the simulation channel establishment module, wherein the general RTI service may include but is not limited to: federal management, statement management, ownership management, data release management, time management, and object management; secondly, the general API service of the performance index evaluation device of the S-band satellite mobile communication system may include, but is not limited to: signal processing engine management, data space management, data mapping and simulation channel establishment module management. The high-level architecture HLA system further comprises: and the RTI is used for being responsible for data communication among the modules. The adapters and RTIs described above may form an intermediate interface layer.
The intermediate interface layer 22 adds the signal processing engine into the simulation federation as the identity of a federation member through the adapter, and issues and orders the required object class and interaction class, the adapter maps the obtained object class and interaction class data required by the simulation channel building module into the input and output variables in the simulation channel building module according to the relevant information, and sends the input and output variables in the simulation channel building module according to the control instruction of the simulation operation manager, such as in the form of the interaction class, and performs corresponding control, such as starting, pausing, continuing, terminating and the like, on the signal processing engine through the API of the simulation channel building module. Thus, the adapter adds the signal processing engine into the simulation federation as the identity of a member of the federation, issues and orders the required object class and interaction class, and performs corresponding control, such as starting, pausing, continuing, terminating and the like, on the signal processing engine through the API of the simulation channel establishing module. The interaction is more convenient, and the control is more convenient for the outside.
The high-level architecture HLA system further comprises: the task control module is used for controlling tasks; and the simulation analysis module is used for analyzing the evaluation result of the simulation. The infrastructure layer 24 may be formed based on a data storage module, a task control module, and a simulation analysis module.
The invention provides a performance index evaluation device of an S-band satellite mobile communication system, which mainly comprises a semi-physical parameter acquisition module 11, a simulation application layer 21, an intermediate interface layer 22, a parallel computation layer 23 and an infrastructure layer 24. The obtained characteristic parameter values of the characteristic parameters related to the satellite signals are led into a simulation application layer 21, communication processing modes are selected in different module pools, then the characteristic parameter values are output through an intermediate interface layer, parallel computing is carried out through a parallel computing layer 23, and finally the characteristic parameter values are output to an infrastructure layer 24, and functions such as task control, simulation analysis, data storage and the like are achieved through different computers.
In conjunction with the above-described high-level architecture HLA system, and with reference to fig. 4, specific applications of embodiments of the present invention are as follows:
and step 210, receiving the satellite signal through the satellite automatic tracking antenna, and obtaining a characteristic parameter value of a characteristic parameter related to the satellite signal.
At step 230, federal membership data is initialized.
And 240, selecting a required communication processing mode from the slave module pool according to the satellite protocol, wherein the required communication processing mode comprises a source coding pool, a channel coding pool, a modulation pool, a multiplexing pool and an interleaving pool which are selected correspondingly according to the satellite protocol, each pool has multiple modes for selection, and the coding mode, the modulation mode, the multiplexing mode and the interleaving mode are selected sequentially through a simulation process.
And step 250, creating a federal member and adding the member into the simulation federation, adding the signal processing engine into the simulation federation according to the identity of one federal member, and issuing and ordering the required object class and the required interaction class.
And 270, providing different propagation scenes and different noise additions for corresponding simulation by the simulation channels by utilizing the processing capacity of the multi-core computer to obtain an error rate curve, simultaneously obtaining simulation results under different channels, and evaluating the performance indexes of the S-band satellite mobile communication system under different propagation environments. And if the general error rate is more than-5 db, evaluating the performance index of the S-band satellite mobile communication system under different propagation environments to be poor.
And step 280, exiting or canceling the simulation federation, wherein the functions of task control, simulation analysis, data storage and the like of the simulation process are respectively executed on three computers. In the process of implementing the performance index evaluation method of the S-band satellite mobile communication system in the embodiment of the invention, tasks such as task control, simulation analysis, data storage and the like of simulation can be distributed to three computers, wherein the task control function mainly comprises the steps of formulating a simulation task and designing a task input control interface; the performance index evaluation device of the S-band satellite mobile communication system mainly adopts a signal processing module as the simulation engine. The data storage function may be an emulation data storage database.
In the embodiment of the invention, the semi-physical parameter obtaining module receives satellite signals through the satellite automatic tracking antenna to obtain characteristic parameter values of characteristic parameters related to the satellite signals, and the simulation channel establishing module performs channel fitting through the characteristic parameter values to establish a simulation channel. The characteristic parameters related to the satellite signals are obtained through the satellite automatic tracking antenna and belong to measured data, so that the characteristic parameter values of the characteristic parameters related to the satellite signals are obtained through measurement, a simulation channel is established and is closer to a real channel of a satellite mobile communication system, and further, the simulation evaluation result is closer to the real situation of the satellite mobile communication system.
The following continues to describe the electronic device provided by the embodiment of the present invention.
An embodiment of the present invention further provides an electronic device, as shown in fig. 5, including a processor 31, a communication interface 32, a memory 33 and a communication bus 34, where the processor 31, the communication interface 32, and the memory 33 complete mutual communication through the communication bus 34,
a memory 33 for storing a computer program;
the processor 31, when executing the program stored in the memory 33, implements the following steps:
receiving satellite signals through a satellite automatic tracking antenna;
obtaining a characteristic parameter value of a characteristic parameter related to the satellite signal;
acquiring an original signal; performing communication processing on the original signal to obtain and send a processed signal;
performing channel fitting according to the characteristic parameter values, establishing a simulation channel, and transmitting the processed signal through the simulation channel;
restoring the transmitted processed signal to obtain a restored signal;
and evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal.
The communication bus mentioned in the electronic device may be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a RAM (Random Access Memory) or an NVM (Non-Volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also a DSP (Digital Signal Processing), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
The method provided by the embodiment of the invention can be applied to electronic equipment. Specifically, the electronic device may be: a desktop computer capable of realizing simulation, a portable computer capable of realizing simulation, a server capable of realizing simulation, and the like. Without limitation, any electronic device that can implement the present invention is within the scope of the present invention.
An embodiment of the present invention provides a computer-readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the performance index evaluation method for an S-band satellite mobile communication system described above.
Embodiments of the present invention provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the steps of the above-described method for performance index estimation of an S-band satellite mobile communication system.
Embodiments of the present invention provide a computer program, which when run on a computer, causes the computer to perform the steps of the performance index evaluation method of the S-band satellite mobile communication system described above.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus/electronic device/storage medium/computer program product/computer program embodiment comprising instructions, the description is relatively simple as it is substantially similar to the method embodiment, and reference may be made to some descriptions of the method embodiment for relevant points.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. A performance index evaluation method of an S-band satellite mobile communication system is characterized by comprising the following steps:
receiving satellite signals through a satellite automatic tracking antenna;
obtaining a characteristic parameter value of a characteristic parameter related to the satellite signal, wherein the characteristic parameter related to the satellite signal comprises: the envelope of the satellite signal, the phase of the satellite signal and the pitch angle of the satellite signal;
acquiring an original signal; performing communication processing on the original signal to obtain and send a processed signal; selecting a target communication processing mode from a preset module pool, wherein the preset module pool is used for storing each communication mode; the preset module pool comprises: each communication processing mode pool, which comprises: more than two of an encoding pool, a modulation pool, a multiplexing pool and an interweaving pool; the target communication processing mode is a target coding mode, a target modulation mode, a target multiplexing mode and a target interleaving mode which are determined from the communication processing modes in the preset module pool;
performing channel fitting according to the characteristic parameter values, establishing a simulation channel, and transmitting the processed signal through the simulation channel; wherein a simulation channel is established by fitting F (b, d, μ) using a non-linear least squares method, wherein,
wherein F (b, d, mu) represents the simulated channel obtained by fitting, yiFor the probability distribution of the processed signal, riTo process the signalM is the number of samples, f (b, d, μ, r)i) Is the probability density of the ith sample in the envelope r;
restoring the transmitted processed signal to obtain a restored signal, wherein the restoring process comprises: two or more of decoding, demodulating, demultiplexing, and deinterleaving, and an actual execution order of the restoration processing is the same as an actual execution order of the communication processing;
and evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal.
2. The method of claim 1, wherein said receiving satellite signals via a satellite auto-tracking antenna comprises:
receiving each satellite signal under different propagation environments through a satellite automatic tracking antenna;
the obtaining of the characteristic parameter value of the characteristic parameter related to the satellite signal includes:
obtaining a characteristic parameter value of a characteristic parameter related to each satellite signal as each characteristic parameter value;
the channel fitting is performed through the characteristic parameter values, a simulation channel is established, and the processed signal is transmitted through the simulation channel, and the method comprises the following steps:
performing channel fitting in parallel through the characteristic parameter values, establishing a plurality of simulation channels, and transmitting the processed signals in parallel through the simulation channels, wherein each simulation channel in the simulation channels comprises: characteristic parameter values corresponding to the simulation channels;
the recovering processing of the processed signal after transmission to obtain a recovered signal includes:
carrying out recovery processing on the transmitted processed signals in parallel to obtain recovery signals;
the evaluating the performance index of the S-band satellite mobile communication system based on the recovery signal comprises the following steps: and evaluating the performance indexes of the S-band satellite mobile communication system under different propagation environments based on the recovery signal.
3. The method of claim 1, wherein the method further comprises:
after the performance index of the S-band satellite mobile communication system is evaluated, the data and the characteristic parameter values of the performance index of the S-band satellite mobile communication system are stored.
4. An apparatus for evaluating performance index of an S-band satellite mobile communication system, comprising:
the semi-physical parameter acquisition module is used for receiving satellite signals through the satellite automatic tracking antenna; obtaining a characteristic parameter value of a characteristic parameter related to the satellite signal;
the transmitting module is used for acquiring an original signal; performing communication processing on the original signal to obtain and send a processed signal to a simulation channel establishing module; wherein the characteristic parameters related to the satellite signals comprise: the envelope of the satellite signal, the phase of the satellite signal and the pitch angle of the satellite signal; selecting a target communication processing mode from a preset module pool, wherein the preset module pool is used for storing each communication mode; the preset module pool comprises: each communication processing mode pool, which comprises: more than two of an encoding pool, a modulation pool, a multiplexing pool and an interweaving pool; the target communication processing mode is a target coding mode, a target modulation mode, a target multiplexing mode and a target interleaving mode which are determined from the communication processing modes in the preset module pool;
the simulation channel establishing module is used for performing channel fitting through the characteristic parameter values, establishing a simulation channel and transmitting the processed signal through the simulation channel; wherein a simulation channel is established by fitting F (b, d, μ) using a non-linear least squares method, wherein,
wherein F (b, d, mu) represents the simulated channel obtained by fitting, yiFor the probability distribution of the processed signal, riIs the envelope value of the ith sample in the envelope r of the processed signal, m is the number of samples, f (b, d, mu, r)i) Is the probability density of the ith sample in the envelope r;
the receiving module is used for receiving the processed signal transmitted by the simulation channel and recovering the transmitted processed signal to obtain a recovered signal; evaluating a performance index of the S-band satellite mobile communication system based on the recovery signal, wherein the recovery process comprises: two or more of decoding, demodulation, demultiplexing, and deinterleaving, and an actual execution order of the restoration processing is the same as an actual execution order of the communication processing.
5. The apparatus of claim 4,
the semi-physical parameter obtaining module is used for receiving each satellite signal in different propagation environments through the satellite automatic tracking antenna; obtaining a characteristic parameter value of a characteristic parameter related to each satellite signal as each characteristic parameter value;
the simulation channel establishing module is configured to perform channel fitting in parallel according to the characteristic parameter values, establish a plurality of simulation channels, and transmit the processed signals in parallel through the plurality of simulation channels, where each simulation channel in the plurality of simulation channels includes: characteristic parameter values corresponding to the simulation channels;
the receiving module is used for receiving the processed signals transmitted by the plurality of simulation channels in parallel and recovering the transmitted processed signals in parallel to obtain recovered signals; and evaluating the performance indexes of the S-band satellite mobile communication system under different propagation environments based on the recovery signal.
6. The apparatus of claim 4, wherein the apparatus further comprises:
and the data storage module is used for storing the data and the characteristic parameter values of the performance indexes of the S-waveband satellite mobile communication system after the performance indexes of the S-waveband satellite mobile communication system are evaluated.
7. An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;
the memory is used for storing a computer program;
the processor, when executing the program stored in the memory, implementing the method steps of any of claims 1-3.
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