CN116418656A - Data communication method and device - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B35/00—Testing or checking of ammunition
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H—ELECTRICITY
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- H04L43/00—Arrangements for monitoring or testing data switching networks
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a data communication method and equipment, which relate to the technical field of data communication and are applied to a receiver, wherein the method comprises the following steps: receiving a subframe sequence sent by a transmitter, wherein the subframe sequence comprises at least one subframe which is sequentially arranged, and the subframe comprises a first synchronous sequence, bearing data, a second synchronous sequence, a third synchronous sequence and an idle time slice; performing channel estimation operation on the third synchronous sequence and a preset synchronous sequence to obtain a channel estimation value; carrying out frequency domain equalization on the bearing data and the second synchronous sequence by utilizing the channel estimation value to obtain an equalization result; and processing the equalization result to obtain communication data, and switching frequency points in an idle time slice of the subframe. The invention can perform frequency domain equalization and frequency hopping, and the signal transmitted on each frequency can perform once channel estimation and channel equalization, thus obtaining more accurate channel estimation value and channel equalization.
Description
Technical Field
The present invention relates to the field of data communication technologies, and in particular, to a data communication method and apparatus.
Background
The frequency hopping communication is a special data communication mode, has strong anti-interference performance, is the most outstanding advantage compared with other communication modes, and can resist radio interference extremely effectively.
The military station communication guided by the frequency hopping communication technology can obtain higher communication quality. In the frequency hopping communication process, military radio stations can realize barrier-free transmission of various key information and secret information through higher data rate and frequency hopping parameters. Taking a military high-speed frequency hopping radio station introduced by a certain company as an example, the product optimizes related problems of insufficient bandwidth, channel multipath fading, signal internal interference, refraction wave interference and the like of a traditional radio station (mainly a short wave radio station) through integrating a differential frequency hopping technology (DFH), a digital signal processing technology and the like. From the practical communication efficiency of this military station, the highest data efficiency of this station reaches 19200bps (bits per second) and the frequency hopping rate reaches 5000 hops/s during communication.
The existing frequency hopping communication technology generally has the following two characteristics:
1. high jump speed and low communication rate. Tens of thousands of hops per second can be implemented using incoherent demodulation techniques, but communication rates are typically in the range of a few kilobits per second (kbps) to a few hundred kilobits per second (kbps); further, incoherent demodulation has the inherent disadvantage that a signal with a high signal-to-noise ratio is required for demodulation.
2. The jump speed is low and the communication rate is high. With coherent demodulation techniques, very high communication rates can be achieved, but with low hops, typically in the range of a few hops per second (hop/s) to a few hundred hops per second (hop/s), the radio interference immunity is poor.
Disclosure of Invention
The invention aims to provide a data communication method and device, which can perform frequency domain equalization and frequency hopping, and can perform channel estimation and channel equalization once on signals transmitted on each frequency, so that more accurate channel estimation values and channel equalization can be obtained.
In order to solve the technical problems, the technical scheme of the invention is as follows:
in a first aspect, a data communication method, applied to a receiver, includes:
receiving a subframe sequence sent by a transmitter, wherein the subframe sequence comprises at least one subframe which is sequentially arranged, and the subframe comprises a first synchronous sequence, bearing data, a second synchronous sequence, a third synchronous sequence and an idle time slice;
performing channel estimation operation on the third synchronous sequence and a preset synchronous sequence to obtain a channel estimation value;
carrying out frequency domain equalization on the bearing data and the second synchronous sequence by utilizing the channel estimation value to obtain an equalization result;
and processing the equalization result to obtain communication data, and switching frequency points in an idle time slice of the subframe.
Further, the first synchronization sequence, the second synchronization sequence and the third synchronization sequence are the same symbol sequence.
Further, the first synchronization sequence and the second synchronization sequence form a first cyclic sequence, and the second synchronization sequence and the third synchronization sequence form a second cyclic sequence.
Further, performing a channel estimation operation on the third synchronization sequence and a preset synchronization sequence to obtain a channel estimation value, including:
extracting a third synchronization sequence in the subframe;
performing fast Fourier transform on the third synchronous sequence and a preset synchronous sequence to obtain a first fast Fourier transform sequence corresponding to the third synchronous sequence and a second fast Fourier transform sequence corresponding to the preset synchronous sequence;
and calculating to obtain a channel estimation value according to the first fast Fourier transform sequence and the second fast Fourier transform sequence.
Further, performing frequency domain equalization on the bearer data and the second synchronization sequence by using the channel estimation value to obtain an equalization result, including:
performing fast fourier transform on the bearing data and the second synchronization sequence to obtain a third fast fourier transform sequence;
according to the channel estimation value and the third fast Fourier transform sequence, calculating to obtain frequency domain equalized data;
and performing inverse Fourier transform on the frequency domain equalized data to obtain an equalization result.
Further, the data communication method further includes:
and deleting the second synchronous sequence in the equalization result to obtain a final equalization result.
Further, processing the equalization result to obtain communication data includes:
carrying out sliding windowing on the bearing data in the final equalization result to obtain a continuous communication data sequence;
de-interleaving the communication data sequence to recover the data in the original coding process;
and decoding the deinterleaved data to obtain communication data.
In a second aspect, a data communication method, applied to a transmitter, includes:
transmitting a subframe sequence to a receiver, wherein the subframe sequence comprises at least one subframe which is sequentially arranged, and the subframe comprises a first synchronous sequence, bearing data, a second synchronous sequence, a third synchronous sequence and an idle time slice; so that the receiver carries out channel estimation operation on the third synchronous sequence and a preset synchronous sequence to obtain a channel estimation value; carrying out frequency domain equalization on the bearing data and the second synchronous sequence by utilizing the channel estimation value to obtain an equalization result; and switching frequency points in the idle time slices of the subframes.
In a third aspect, a data communication apparatus includes:
one or more processors;
and a storage device for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the above-described methods.
In a fourth aspect, a computer readable storage medium stores a program that when executed by a processor implements the above method.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme, the channel estimation value is obtained by carrying out channel estimation operation on the third synchronous sequence and the preset synchronous sequence; carrying out frequency domain equalization on the bearing data and the second synchronous sequence by utilizing the channel estimation value to obtain an equalization result; and processing the equalization result to obtain communication data, switching frequency points in an idle time slice of a subframe, performing frequency domain equalization and frequency hopping, and performing channel estimation and channel equalization once on signals transmitted on each frequency to obtain more accurate channel estimation values and channel equalization.
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Fig. 1 is a flow chart of a data communication method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a subframe sequence of a data communication method according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of a data communication method according to an embodiment of the present invention, in which the third synchronization sequence and the preset synchronization sequence are subjected to channel estimation operation to obtain a channel estimation value.
Fig. 4 is a schematic diagram of a subframe sequence illustrated in a data communication method provided by an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention proposes a data communication method applied to a receiver, the method comprising:
and step 14, processing the equalization result to obtain communication data, and switching frequency points in an idle time slice of the subframe.
In the embodiment of the present invention, in step 11, the receiver receives the subframe sequence transmitted by the transmitter, including at least one subframe arranged in sequence, which corresponds to the start of data transmission, and the receiver starts to receive data from the transmitter. In step 12, a channel estimation operation is performed by using the third synchronization sequence and the preset synchronization sequence to obtain a channel estimation value, and in wireless communication, the channel may be interfered by multiple factors to affect the reliability and stability of data transmission, and by performing the channel estimation operation, an estimation value of the current channel may be obtained, so as to provide basic data for the next frequency domain equalization. In step 13, the channel estimation value is utilized to perform frequency domain equalization on the bearing data and the second synchronization sequence to obtain an equalization result, wherein the frequency domain equalization refers to processing the received signal at the receiving end so as to reduce the problems of frequency distortion, frequency response mismatch and the like in the signal, thereby improving the quality and reliability of data transmission, and the equalization result is the processed bearing data for subsequent data decoding and error correction. In step 14, the channel quality is susceptible to interference and noise, so in order to ensure the reliability and stability of data transmission, frequency points may need to be switched. The frequency point switching is performed in an idle time slice of the subframe, and the optimal frequency point is selected for switching, so that the quality and the reliability of data transmission are further improved. Therefore, the data communication method effectively enhances the reliability and stability of data transmission by using channel estimation, frequency domain equalization and frequency point switching, improves the quality of data transmission, and simultaneously improves the overall performance of a wireless communication system.
As shown in fig. 2, one implementation manner of the subframe sequence includes: identical 3 "UW" (special word) sequences, which may be m-sequences (maximum length sequences) or ZC sequences (Zaddoff-Chu sequences); "DATA" is a symbol carrying valid DATA; the "null" represents an idle time slice for switching a frequency point without data, wherein the structure of the subframe in fig. 2 corresponds to the first synchronization sequence, the bearer data, the second synchronization sequence, the third synchronization sequence, and the idle time slice in the present invention from left to right, respectively.
In another optional embodiment of the present invention, the first synchronization sequence, the second synchronization sequence and the third synchronization sequence are identical symbol sequences, the first synchronization sequence and the second synchronization sequence form a first cyclic sequence, and the second synchronization sequence and the third synchronization sequence form a second cyclic sequence.
In the embodiment of the present invention, the first synchronization sequence, the second synchronization sequence and the third synchronization sequence are the same symbol sequences, which indicates that the same coding mode is adopted in the transmission process. If different coding modes are adopted in different subframes, the difficulty and complexity of decoding at the receiving end may be increased, so that the same coding mode is used to reduce the complexity of decoding and improve the reliability of the system, wherein the first synchronization sequence and the second synchronization sequence form a first cyclic sequence, and the second synchronization sequence and the third synchronization sequence form a second cyclic sequence. The cyclic sequence is often used in the synchronization and timing aspects of wireless communication, and its main function is to realize the synchronization and timing functions without additional channel overhead. Specifically, in the process of data communication, a transmitter periodically transmits a synchronization sequence, and then a receiver performs operations such as channel estimation and frequency domain equalization by using the received synchronization sequence, so as to realize synchronization of the two parties, and the application of a cyclic sequence in wireless communication combines different synchronization sequences, so that a more flexible and efficient synchronization mode is realized. Therefore, the invention uses the same symbol sequence to form the cyclic sequence, which can greatly reduce the decoding complexity, and can realize a more flexible and efficient synchronous mode by reasonably combining the synchronous sequences, thereby further improving the quality of data transmission and the reliability and stability of the system.
As shown in fig. 3, in the embodiment of the present invention, the step 12 may include:
and step 123, calculating to obtain a channel estimation value according to the first fast Fourier transform sequence and the second fast Fourier transform sequence.
In the embodiment of the present invention, in step 121, the subframe includes the third synchronization sequence, so the third synchronization sequence needs to be extracted from the subframe to perform channel estimation. Next, in step 122, the third synchronization sequence and the preset synchronization sequence are subjected to fast fourier transform, so as to obtain their corresponding fast fourier transform sequences. The fast fourier transform is a commonly used signal processing technique that can convert time domain signals into frequency domain signals for more convenient processing and analysis. Finally, in step 123, a channel estimate is calculated from the first fft sequence and the second fft sequence. Channel estimation refers to processing a received signal by a receiving end, and presuming signal characteristics of channel transmission, so as to provide basic data for subsequent signal processing. The received signals can be better understood and processed through channel estimation, and the reliability and stability of the system are improved. Therefore, the invention adopts the technical means of extracting the third synchronous sequence, fast Fourier transformation, channel estimation and the like, and can effectively improve the efficiency and the precision of signal processing, thereby improving the quality of data transmission and the reliability and the stability of the system. These measures not only can raise the reliability of communication, but also can raise the whole performance of system, and can make data transmission more high-effective and stable.
In an embodiment of the present invention, the step 13 may include:
step 131, performing a fast fourier transform on the bearer data and the second synchronization sequence to obtain a third fast fourier transform sequence;
step 132, calculating to obtain frequency domain equalized data according to the channel estimation value and the third fast fourier transform sequence;
and step 133, performing inverse Fourier transform on the frequency domain equalized data to obtain an equalization result.
In the embodiment of the present invention, in step 131, the carrying data and the second synchronization sequence are subjected to a fast fourier transform, and the time domain signal can be converted into the frequency domain signal through the fast fourier transform, so that the processing and the analysis are more convenient, and the third fast fourier transform sequence can be obtained through the fast fourier transform of the carrying data and the second synchronization sequence. In step 132, frequency domain equalized data is calculated based on the channel estimate and the third fft sequence. By adopting the channel estimation value to carry out frequency domain equalization, signal distortion and interference caused by a channel can be corrected, thereby improving the reliability of data transmission and reducing the error rate. In step 133, the frequency domain equalized data is subjected to inverse fourier transform to obtain an equalization result, where the inverse fourier transform may convert the frequency domain signal into a time domain signal, so as to obtain equalized data, and by performing frequency domain equalization and inverse fourier transform, the quality of data transmission and the reliability of the system may be further improved. Therefore, the invention adopts the technical means of carrying out frequency domain equalization on the bearing data by the channel estimation value, can better correct the distortion and interference caused by the channel, improves the reliability and stability of data transmission, and reduces the bit error rate. These measures not only can raise the reliability of communication, but also can raise the whole performance of system, and can make data transmission more high-effective and stable.
In another preferred embodiment of the present invention, the data communication method further includes:
and step 15, deleting the second synchronous sequence in the equalization result to obtain a final equalization result.
In the embodiment of the present invention, in step 15, the second synchronization sequence in the equalization result is deleted, so as to obtain a final equalization result. The second synchronisation sequence has been effected in the preceding step for the receiving end to determine the characteristics of the channel and so this signal is no longer required in the subsequent data processing and can be deleted to reduce interference with subsequent processing. By processing the equalization result, the reliability and stability of data transmission can be improved. Deleting the second synchronization sequence may reduce errors generated under the influence of the signal and further reduce the bit error rate. Therefore, the receiving end can obtain more accurate and higher-quality data, and the performance and reliability of the whole system are improved. Therefore, the invention adopts the technical means of processing the equalization result, can improve the reliability and stability of data transmission, simultaneously reduce the error rate and further optimize the performance of the whole system.
In the embodiment of the present invention, in step 14, the method may include:
step 141, sliding and windowing the bearing data in the final equalization result to obtain a continuous communication data sequence;
step 142, de-interleaving the communication data sequence to recover the data in the original coding;
step 143, decoding the deinterleaved data to obtain communication data;
in the embodiment of the invention, the communication data is obtained by performing a series of processes such as sliding windowing, matched filtering, de-interleaving and decoding on the bearing data in the final equalization result. The processing steps can effectively remove the influence of factors such as channel interference, distortion and the like on data transmission, so that more accurate and reliable communication data are obtained, and the quality and reliability of the data transmission are further improved. Therefore, the invention adopts the technical means of switching the frequency points in the idle time slices of the subframes, can further improve the reliability and stability of data transmission, avoid the influence of factors such as channel interference, distortion and the like on the data transmission, and optimize the performance of the whole system at the same time, so that the data transmission is more efficient, reliable and stable.
As shown in fig. 4, an embodiment of the method of the present invention includes:
the transmitter sends the subframe sequence shown in fig. 2, and completes the next frequency point switching in the time slice where the "null" is located, where the subframe sequence in fig. 4 is sequentially, from left to right, a first synchronization sequence, a bearing data, a second synchronization sequence, a third synchronization sequence, and a free time slice.
The receiver receives the sequence of subframes in the format. As shown in fig. 4, the sequences marked by brackets 2 are a cyclic sequence consisting of two identical UW sequences (a second synchronization sequence and a third synchronization sequence), the sequences marked by brackets 1, the first and the last UW sequences are respectively a first synchronization sequence and a second synchronization sequence, and 1 cyclic sequence is also formed;
and (3) carrying out channel estimation operation on the received third synchronous sequence in the bracket 2 and a locally known UW sequence, wherein the method comprises the following steps of: respectively performing fast Fourier transform on the third synchronous sequence and the locally known UW sequence to respectively obtain FFT (fast Fourier transform) corresponding to the third synchronous sequence UW FFT corresponding to locally known UW sequence Local_UW Then the channel estimate w=fft Local_UW / FFT UW ；
And carrying out frequency domain equalization on the sequence marked by the bracket 3 by using the channel estimation value, wherein the method comprises the following steps: firstly, performing fast Fourier transform on sequences marked by brackets 3 to obtain a frequency domain signal FFT data Then the frequency domain equalized data y=w×fft data = FFT Local_UW / FFT UW × FFT data Performing inverse Fourier transform on the frequency domain equalized data y to obtain an equalized result of the sequences marked by brackets 3;
the sequences marked by brackets 3 after the frequency domain equalization operation are deleted from the UW part, only the DATA part is reserved, and the DATA part contains effective modulation DATA and is sent to a subsequent analysis module, such as de-interleaving, LDPC decoder and the like.
And completing the switching of a next frequency point in the time slice where the 'null' is located, and realizing the switching of the frequency point by modifying the frequency of a DDS (direct digital synthesis) phase-locked loop or an analog phase-locked loop.
Therefore, the invention can perform frequency domain equalization and frequency hopping, the subframe can realize longer frame structure through cascading, and channel estimation and frequency domain equalization can be performed once for each frequency point, namely, channel estimation and channel equalization can be performed once for signals transmitted on each frequency, and more accurate channel estimation value and channel equalization can be obtained. The cyclic sequence is formed by two identical 'UW' sequences and the channel estimation is performed by using a third synchronous sequence. Communication rate similar to single carrier frequency domain equalization can be achieved. Meanwhile, the method has the technical advantages brought by a frequency domain equalization technology and a frequency hopping technology. The length of the UW, the DATA and the empty can be adjusted according to different requirements. "UW" may be m sequences or ZC sequences; "DATA" may be a BPSK symbol or a QPSK symbol or a QAM symbol. The frequency hopping is performed in the time slice corresponding to the null, and the transmitter does not transmit signals at the moment, so that the power consumption can be saved.
The method disclosed by the embodiment of the invention integrates the single-carrier frequency domain equalization technology and the fast jump technology, and inherits the technical advantages of high-speed communication and multi-channel interference resistance of the single-carrier frequency domain equalization technology. The frequency hopping rate depends on the subframe length and the symbol rate, and the lengths of "UW", "DATA" and "null" can be adjusted according to different requirements, and the symbol rate can also be adjusted.
The following examples are given: assuming that the length of "UW" is equal to 16 symbols, the length of "DATA" is equal to 112 symbols, and the length of "null" is equal to 16 symbols, the length of one subframe is equal to 176 symbols; assuming that the symbol rate is equal to 17.6Msps/s, the transmission time of one subframe is 10us, namely, the frequency point is switched every 10us, namely, the frequency hopping rate is 10 ten thousand hops per second; assuming that the modulation scheme adopted is QPSK modulation and the error correction code is 1/2 code, the communication rate=112/176×17.6mbps=11.2 Mbps.
In summary, in this example, both the communication rate and the frequency hopping rate are significantly advantageous over existing frequency hopping communication techniques.
A data communication method applied to a transmitter, the method comprising:
transmitting a subframe sequence to a receiver, wherein the subframe sequence comprises at least one subframe which is sequentially arranged, the subframe comprises a first synchronous sequence, bearing data, a second synchronous sequence, a third synchronous sequence and an idle time slice, so that the receiver carries out channel estimation operation on the third synchronous sequence and a preset synchronous sequence to obtain a channel estimation value, carrying out frequency domain equalization on the bearing data and the second synchronous sequence by using the channel estimation value to obtain an equalization result, and processing the equalization result to obtain communication data; and switching frequency points in the idle time slices of the subframes.
Optionally, the first synchronization sequence, the second synchronization sequence and the third synchronization sequence are the same symbol sequence.
Optionally, the first synchronization sequence and the second synchronization sequence form a first cyclic sequence, and the second synchronization sequence and the third synchronization sequence form a second cyclic sequence.
Optionally, performing a channel estimation operation on the third synchronization sequence and a preset synchronization sequence to obtain a channel estimation value, including:
extracting a third synchronization sequence in the subframe;
performing fast Fourier transform on the third synchronous sequence and a preset synchronous sequence to obtain a first fast Fourier transform sequence corresponding to the third synchronous sequence and a second fast Fourier transform sequence corresponding to the preset synchronous sequence;
and calculating to obtain a channel estimation value according to the first fast Fourier transform sequence and the second fast Fourier transform sequence.
Optionally, performing frequency domain equalization on the bearer data and the second synchronization sequence by using the channel estimation value to obtain an equalization result, including:
performing fast fourier transform on the bearing data and the second synchronization sequence to obtain a third fast fourier transform sequence;
according to the channel estimation value and the third fast Fourier transform sequence, calculating to obtain frequency domain equalized data;
and performing inverse Fourier transform on the frequency domain equalized data to obtain an equalization result.
Optionally, the receiver further deletes the second synchronization sequence in the equalization result to obtain a final equalization result.
Optionally, processing the equalization result to obtain communication data includes:
carrying out sliding windowing on the bearing data in the final equalization result to obtain a continuous communication data sequence;
de-interleaving the communication data sequence to recover the data in the original coding process;
and decoding the deinterleaved data to obtain communication data.
In the embodiment of the invention, when transmitting the subframe sequence, the transmitter transmits at least one subframe which is sequentially arranged to the receiver, wherein each subframe comprises a first synchronization sequence, bearing data, a second synchronization sequence, a third synchronization sequence and an idle time slice which are sequentially arranged. Thus, the efficiency and stability of data transmission can be effectively improved, because the subframes arranged in sequence can enable data to be transmitted one by one according to a preset sequence.
Secondly, when the channel estimation operation is carried out, the receiver utilizes the received third synchronous sequence and the preset synchronous sequence to estimate, and then a channel estimation value is obtained. In this way, the influence of the channel can be reduced by estimating the parameters of the channel, and the identification and processing capacity of the receiver on the data can be improved.
And then, when carrying out frequency domain equalization, the transmitter carries out frequency domain equalization on the bearing data and the second synchronous sequence by utilizing the channel estimation value to obtain an equalization result. Thus, the received data can be processed for removing interference and noise, and the reliability and the correctness of data transmission are improved.
And finally, processing the equalization result to obtain communication data, and switching frequency points in the idle time slices of the subframes. Therefore, data transmission can be carried out on different frequency points, so that the influence of factors such as channel interference, distortion and the like on the data transmission is better avoided, and the data transmission is more efficient, reliable and stable.
Therefore, the method can effectively improve the efficiency, stability and reliability of data transmission, reduce the influence caused by channels, optimize the performance of the whole system and enable the data transmission to be more efficient, reliable and stable.
The embodiment of the invention also provides data communication equipment, which comprises: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. All the implementation manners in the method embodiment are applicable to the embodiment, and the same technical effect can be achieved.
Embodiments of the present invention also provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform a method as described above. All the implementation manners in the method embodiment are applicable to the embodiment, and the same technical effect can be achieved.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system, data communication device and unit may refer to corresponding procedures in the foregoing method embodiments, which are not described in detail herein.
In the embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units 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 units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.
Furthermore, it should be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. Also, the steps of performing the series of processes described above may naturally be performed in chronological order in the order of description, but are not necessarily performed in chronological order, and some steps may be performed in parallel or independently of each other. It will be appreciated by those of ordinary skill in the art that all or any of the steps or components of the methods and apparatus of the present invention may be implemented in hardware, firmware, software, or any combination thereof in any computing device (including processors, storage media, etc.) or network of computing devices, as would be apparent to one of ordinary skill in the art after reading this description of the invention.
The object of the invention can thus also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general purpose device. The object of the invention can thus also be achieved by merely providing a program product containing program code for implementing said method or device. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is apparent that the storage medium may be any known storage medium or any storage medium developed in the future. It is also noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. The steps of executing the series of processes may naturally be executed in chronological order in the order described, but are not necessarily executed in chronological order. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A method of data communication for use with a receiver, the method comprising:
receiving a subframe sequence sent by a transmitter, wherein the subframe sequence comprises at least one subframe which is sequentially arranged, and the subframe comprises a first synchronous sequence, bearing data, a second synchronous sequence, a third synchronous sequence and an idle time slice;
performing channel estimation operation on the third synchronous sequence and a preset synchronous sequence to obtain a channel estimation value;
carrying out frequency domain equalization on the bearing data and the second synchronous sequence by utilizing the channel estimation value to obtain an equalization result;
and processing the equalization result to obtain communication data, and switching frequency points in an idle time slice of the subframe.
2. The data communication method of claim 1, wherein the first synchronization sequence, the second synchronization sequence, and the third synchronization sequence are the same symbol sequence.
3. The data communication method according to claim 2, wherein the first synchronization sequence and the second synchronization sequence constitute a first cyclic sequence, and the second synchronization sequence and the third synchronization sequence constitute a second cyclic sequence.
4. The data communication method according to claim 3, wherein performing a channel estimation operation on the third synchronization sequence and a preset synchronization sequence to obtain a channel estimation value includes:
extracting a third synchronization sequence in the subframe;
performing fast Fourier transform on the third synchronous sequence and a preset synchronous sequence to obtain a first fast Fourier transform sequence corresponding to the third synchronous sequence and a second fast Fourier transform sequence corresponding to the preset synchronous sequence;
and calculating to obtain a channel estimation value according to the first fast Fourier transform sequence and the second fast Fourier transform sequence.
5. The method of claim 4, wherein performing frequency domain equalization on the bearer data and the second synchronization sequence using the channel estimation value to obtain an equalization result, comprising:
performing fast fourier transform on the bearing data and the second synchronization sequence to obtain a third fast fourier transform sequence;
according to the channel estimation value and the third fast Fourier transform sequence, calculating to obtain frequency domain equalized data;
and performing inverse Fourier transform on the frequency domain equalized data to obtain an equalization result.
6. The data communication method according to claim 5, further comprising:
and deleting the second synchronous sequence in the equalization result to obtain a final equalization result.
7. The data communication method according to claim 6, wherein processing the equalization result to obtain communication data comprises:
carrying out sliding windowing on the bearing data in the final equalization result to obtain a continuous communication data sequence;
de-interleaving the communication data sequence to recover the data in the original coding process;
and decoding the deinterleaved data to obtain communication data.
8. A method of data communication for a transmitter, the method comprising:
transmitting a subframe sequence to a receiver, wherein the subframe sequence comprises at least one subframe which is sequentially arranged, and the subframe comprises a first synchronous sequence, bearing data, a second synchronous sequence, a third synchronous sequence and an idle time slice; so that the receiver carries out channel estimation operation on the third synchronous sequence and a preset synchronous sequence to obtain a channel estimation value; carrying out frequency domain equalization on the bearing data and the second synchronous sequence by utilizing the channel estimation value to obtain an equalization result; and switching frequency points in the idle time slices of the subframes.
9. A data communication device, comprising:
one or more processors;
storage means for storing one or more programs which when executed by the one or more processors cause the one or more processors to implement the method of any of claims 1-7 or the method of claim 8.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a program which, when executed by a processor, implements the method according to any one of claims 1-7 or the method according to claim 8.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070147529A1 (en) * | 2004-07-16 | 2007-06-28 | Wladimir Bocquet | Frequency domain equalization method and apparatus for a single carrier receiver |
| US20090116567A1 (en) * | 2007-11-07 | 2009-05-07 | Integrated System Solution Corp. | Channel estimation method and apparatus for long range signals in bluetooth |
| CN103384226A (en) * | 2012-05-02 | 2013-11-06 | 电信科学技术研究院 | Method and device for frequency domain equalization detection |
| CN105516031A (en) * | 2015-12-18 | 2016-04-20 | 北京航空航天大学 | Channel estimation and channel equalization method of fast frequency hopping system |
| KR20180008025A (en) * | 2016-07-15 | 2018-01-24 | 건국대학교 산학협력단 | Method of iteratively estimating and equalizing a channel in a frequency oversampling domain in a fbmc/oqam system and apparatus for the same |
-
2023
- 2023-06-06 CN CN202310658674.XA patent/CN116418656B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070147529A1 (en) * | 2004-07-16 | 2007-06-28 | Wladimir Bocquet | Frequency domain equalization method and apparatus for a single carrier receiver |
| US20090116567A1 (en) * | 2007-11-07 | 2009-05-07 | Integrated System Solution Corp. | Channel estimation method and apparatus for long range signals in bluetooth |
| CN103384226A (en) * | 2012-05-02 | 2013-11-06 | 电信科学技术研究院 | Method and device for frequency domain equalization detection |
| CN105516031A (en) * | 2015-12-18 | 2016-04-20 | 北京航空航天大学 | Channel estimation and channel equalization method of fast frequency hopping system |
| KR20180008025A (en) * | 2016-07-15 | 2018-01-24 | 건국대학교 산학협력단 | Method of iteratively estimating and equalizing a channel in a frequency oversampling domain in a fbmc/oqam system and apparatus for the same |
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