CN116708112B - Transmission and detection method, medium and device for reducing PAPR of FMT system - Google Patents
Transmission and detection method, medium and device for reducing PAPR of FMT system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/264—Pulse-shaped multi-carrier, i.e. not using rectangular window
- H04L27/26416—Filtering per subcarrier, e.g. filterbank multicarrier [FBMC]
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/26534—Pulse-shaped multi-carrier, i.e. not using rectangular window
- H04L27/2654—Filtering per subcarrier, e.g. filterbank multicarrier [FBMC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
本发明提供一种降低FMT系统PAPR的传输与检测方法、介质及装置，所述传输与检测方法中，FMT系统的发射端利用通道选择比特和调制比特进行通道调制，在接收端进行相应的通道解调，从而实现降低FMT系统PAPR的传输与检测。本发明将发射端比特数据通过通道调制的方式进行传输，减少了通道数的使用，且传输速率可以根据使用的通道数以及调制方式结合调整，数值仿真表明该传输方法降低了FMT系统传输的PAPR。
The present invention provides a transmission and detection method, medium and device for reducing the PAPR of an FMT system. In the transmission and detection method, the transmitting end of the FMT system uses channel selection bits and modulation bits to perform channel modulation, and the receiving end performs corresponding channel modulation. Demodulation, thereby reducing the transmission and detection of PAPR of the FMT system. This invention transmits bit data at the transmitting end through channel modulation, reducing the use of the number of channels, and the transmission rate can be adjusted according to the number of channels used and the modulation method. Numerical simulation shows that this transmission method reduces the PAPR of FMT system transmission. .
Description
Technical Field
The invention relates to the technical field of communication, in particular to a transmission and detection method, medium and device for reducing PAPR (Peak to Average Power Ratio peak-to-average ratio) of an FMT (Filtered Multitone Modulation) system.
Background
The multitone filtering modulation technology is a multi-carrier transmission technology, and is essentially to modulate data to different frequency points for transmission, and the frequency spectrums of the sub-channels are not overlapped when the system is used for transmission. Because the FMT system uses the filter to divide the sub-channels in the frequency domain, the sub-channels are orthogonal to each other, so that the FMT system has better performance in resisting frequency offset and multipath effect, and can be suitable for Doppler channel environment. But its peak-to-average ratio problem has an impact on FMT system implementation performance.
Disclosure of Invention
The invention aims to provide a transmission and detection method, medium and device for reducing PAPR of an FMT system so as to solve the influence of peak-to-average ratio on the implementation performance of the FMT system.
The invention provides a transmission and detection method for reducing PAPR of an FMT system, which comprises the following steps:
the transmitting end executes the steps 1 to 5:
step 1: setting an FMT system;
step 2: and (3) channel modulation: for the followingMChannels are first toMDividing the individual channels equally intoLGroups, each group having a channel number ofN=M/LThe method comprises the steps of carrying out a first treatment on the surface of the For each subgroupl，l∈1,2,…,LThe transmission information comprises channel selection bits and modulation bits, wherein the channel selection bits are used for selecting channels used for activation, the modulation bits are placed on the channels used for activation for transmission, and the modulation bits are not transmitted on the channels used for deactivation;
step 3: calculation ofMInverse fast fourier transform, IFFT, of individual channels;
step 4: the step 3 is calculatedMThe data of each channel is filtered by a filter bank;
step 5: filtering the step 4MThe data of the channels are transmitted through an antenna of a transmitting end after parallel-serial conversion;
the receiving end executes the steps 6 to 9:
step 6: will receive the signalySerial-to-parallel conversion toMData of the individual channels;
step 7: step 6 is performed by matching the filter bankMThe data of the channels are subjected to matched filtering through a matched filter bank;
step 8: calculating the fast Fourier transform FFT of the data of each channel after the matching and filtering in the step 7, and combining the calculation results of all channels into a vector matrix；
Step 9: and (3) channel demodulation: firstly, according to the configuration of a transmitting end, carrying out block demodulation, and carrying out vector matrix in the step 8Aliquoting intoLGroups, the signal of each group is expressed as +.>，i∈1,2,…,LFirst, theiThe detection result of the group is expressed as, wherein ,/>For groupingiChannel frequency domain response of (a); />For the entire set of candidate bits,is->Subset of (a), i.e.)>Finally, the detection result is->Demapping is to transmit bits, argmin representing the variable value at which the minimum value is taken.
Further, step 1 includes:
recording deviceMFast fourier transform FFT point number and channel number for parallel input channel numberMThe same is true of the fact that,kthe impulse response of the filter at time instant ish(k) The transmitting side signal is expressed as:
wherein ,A m is the firstmModulated signals of individual channels, m e 0,M-1]，vthe integral variable is represented by a value of the integral variable,jin units of imaginary numbers,h(k-vM) Indicating the current timekDelay timevMThe impulse response of the subsequent filter.
Further, the number of channel selection bits and the number of modulation bits in step 2 are as follows:
the number of channel selection bits is，mIs a subgrouplThe number of channels in (a) for activating the transmission of information, is used for the transmission of information>Representing slaveNSelection among individual channelsmThe number of permutations and combinations of the individual activation channels;
the number of the modulation bits is，/>Modulation order for constellation points.
Further, the transmission model of the transmitting antenna in step 5 is expressed asy=hx+w, wherein ,yrepresenting the received signal(s),hindicating the gain of the channel,wmean 0 and variance ofIs a gaussian noise of (c).
The invention also provides a computer terminal storage medium which stores computer terminal executable instructions for executing the transmission and detection method for reducing the PAPR of the FMT system.
The present invention also provides a computing device comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the transmission and detection method for reducing PAPR of the FMT system.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
the invention transmits the transmitting end bit data in a channel modulation mode, reduces the use of the channel number, and the transmission rate can be combined and adjusted according to the used channel number and the modulation mode, and numerical simulation shows that the transmission method reduces the PAPR of the FMT system transmission.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of an FMT system in an embodiment of the present invention.
Fig. 2 is a schematic block diagram of channel modulation in an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
By the number of channelsM=64, divided intoL=32 groups, each group having the number of channels ofN=M/L=2, number of channels for transmitting informationm1, the number of channel select bits isThe modulation bits are BPSK modulated, and the number of the modulation bits is +.>Modulation orderMod2. The specific implementation manner of the present invention is described by taking the maximum likelihood detection method as an example, as shown in fig. 1 and fig. 2, the present embodiment proposes a transmission and detection method for reducing the PAPR of the FMT system:
transmitting end:
step 1: setting an FMT system; generating an information bit stream, dividing the bit stream intoLGroup, then one slot transmissionL×(b 1 +b 2 ) =64 bits;
step 2: and (3) channel modulation: within each subgroup of each slot, 2 bits are transmitted, with BPSK modulation;
if it is: indicating the use of the first channel and modulating bit 0 on the channel for-1 transmission;
if it is: indicating the use of the first channel and modulating bit 0 to a 1 transmission on the channel;
if it is: indicating the use of a second channel and modulating bit 0 on the channel for-1 transmission;
if it is: indicating the use of a second channel and modulating bit 0 to a 1 transmission on the channel;
step 3: calculating the Inverse Fast Fourier Transform (IFFT) of 64 channels;
step 4: filtering the 64 channel data obtained by calculation in the step 3 through a filter bank;
step 5: the 64 channel data after the filtering in the step 4 are transmitted through an antenna of a transmitting end after being subjected to parallel-serial conversion;
the receiving end:
step 6: serial-parallel converting the received signal into 64 channels of data;
step 7: the data of 64 channels in the step 6 are subjected to matched filtering through a matched filter bank;
step 8: calculating the FFT of 64 channels after matching and filtering in the step 7, and combining the calculation results of all channels into a vector matrix；
Step 9: and (3) channel demodulation: firstly, according to the configuration of a transmitting end, carrying out block demodulation, and carrying out vector matrix in the step 8Equally divided into 32 groups, the signal of each group is expressed as +.>，i∈1,2,…,LFirst, theiThe detection result of the group is expressed as, wherein ,/>For groupingiChannel frequency domain response of (a); candidate bit set of 2-selected 1-channel using BPSK modulation +.>Denoted as->，/>Denoted as->Finally the detection result is +.>Demapping is to transmit bits, argmin representing the variable value at which the minimum value is taken.
Furthermore, in some embodiments, a computer terminal storage medium is provided, storing computer terminal executable instructions for performing the transmission and detection method for reducing PAPR of FMT system as described in the previous embodiments. Examples of the computer storage medium include magnetic storage media (e.g., floppy disks, hard disks, etc.), optical recording media (e.g., CD-ROMs, DVDs, etc.), or memories such as memory cards, ROMs, or RAMs, etc. The computer storage media may also be distributed over network-connected computer systems, such as stores for application programs.
Furthermore, in some embodiments, a computing device is presented comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the transmission and detection method for reducing PAPR of an FMT system as described in the previous embodiments. Examples of computing devices include PCs, tablets, smartphones, PDAs, etc.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The transmission and detection method for reducing the PAPR of the FMT system is characterized by comprising the following steps:
the transmitting end executes the steps 1 to 5:
step 1: setting an FMT system;
step 2: and (3) channel modulation: for the followingMChannels are first toMDividing the individual channels equally intoLGroups, each group having a channel number ofN=M/LThe method comprises the steps of carrying out a first treatment on the surface of the For each subgroupl，l∈1,2,…,LThe transmission information comprises channel selection bits and modulation bits, wherein the channel selection bits are used for selecting channels used for activation, the modulation bits are placed on the channels used for activation for transmission, and the modulation bits are not transmitted on the channels used for deactivation;
step 3: calculation ofMInverse fast fourier transform, IFFT, of individual channels;
step 4: the step 3 is calculatedMThe data of each channel is filtered by a filter bank;
step 5: filtering the step 4MThe data of the channels are transmitted through an antenna of a transmitting end after parallel-serial conversion;
the receiving end executes the steps 6 to 9:
step 6: will receive the signalySerial-to-parallel conversion toMData of the individual channels;
step 7: step 6 is performed by matching the filter bankMThe data of the channels are subjected to matched filtering through a matched filter bank;
step 8: calculating the fast Fourier transform FFT of the data of each channel after the matching and filtering in the step 7, and combining the calculation results of all channels into a vector matrix；
Step 9: and (3) channel demodulation: firstly, according to the configuration of a transmitting end, carrying out block demodulation, and carrying out vector matrix in the step 8Aliquoting intoLGroups, the signal of each group is expressed as +.>，i∈1,2,…,LFirst, theiThe detection result of the group is expressed as, wherein ,/>For groupingiChannel frequency domain response of (a); />For the entire set of candidate bits,is->Subset of (a), i.e.)>Finally, the detection result is->Demapping is to transmit bits, argmin representing the variable value at which the minimum value is taken.
2. The transmission and detection method for reducing PAPR of FMT system according to claim 1, wherein step 1 includes:
recording deviceMFast fourier transform FFT point number and channel number for parallel input channel numberMThe same, current timekThe impulse response of the filter of (2) ish(k) The transmitting side signal is expressed as:
wherein ,A m is the firstmModulated signals of individual channels, m e 0,M-1]，vthe integral variable is represented by a value of the integral variable,jin units of imaginary numbers,h(k-vM) Indicating the current timekDelay timevMThe impulse response of the subsequent filter.
3. The transmission and detection method for reducing PAPR of FMT system according to claim 2, wherein the number of channel selection bits and the number of modulation bits in step 2 are as follows:
the number of channel selection bits is，mIs a subgrouplThe number of channels in (a) for activating the transmission of information, is used for the transmission of information>Representing slaveNSelection among individual channelsmThe number of permutations and combinations of the individual activation channels;
the number of the modulation bits is，/>Modulation order for constellation points.
4. A transmission and detection method for reducing PAPR of FMT system according to claim 3, wherein the transmission model of transmitting end antenna in step 5 is expressed asy=hx+w, wherein ,yrepresenting the received signal(s),hindicating the gain of the channel,wmean 0 and variance ofIs a gaussian noise of (c).
5. A computer terminal storage medium storing computer terminal executable instructions for performing the transmission and detection method for reducing PAPR of FMT system according to any one of claims 1-4.
6. A computing device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the transmission and detection method for reducing PAPR of an FMT system according to any one of claims 1-4.
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