CN109951194A - A kind of data transmission method - Google Patents
A kind of data transmission method Download PDFInfo
- Publication number
- CN109951194A CN109951194A CN201910092322.6A CN201910092322A CN109951194A CN 109951194 A CN109951194 A CN 109951194A CN 201910092322 A CN201910092322 A CN 201910092322A CN 109951194 A CN109951194 A CN 109951194A
- Authority
- CN
- China
- Prior art keywords
- data
- signal
- fft
- sent
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention discloses a kind of data transmission methods, comprising: data symbol to be sent is divided into data symbols number section and serialization number；According to the serial number of data symbols number section, adding window is carried out to each data symbols number section respectively and FFT is handled；According to the serial number of data symbols number section, treated that data segment carries out respectively real empty staggeredly extracts to each；The output of each FFT frequency point is up-sampled and filtered respectively, and is superposed to intermediate frequency transmission signal after being D/A respectively to the result of filtering；Intermediate frequency is sent into signal after up-conversion, is sent by power amplifier.The present invention passes through serioparallel exchange, data rate on each subsignal is 1/N times of input data, after K times of up-sampling, data rate on each subsignal is K/N times of input data, by being digital-to-analogue conversion D/A respectively to each FFT frequency point, multiple D/A conversions are converted by D/A converter, therefore the sampling rate of the D/A converter on each subsignal is reduced to K/N times of input data, thus greatly reduces the cost of D/A converter and A/D converter.
Description
Technical field
The invention belongs to wireless communication technology fields, more particularly, to a kind of data transmission method.
Background technique
With the rapid development of mobile communication, the frequency resource of low-frequency range is almost run out, but still there is frequency shortage
And frequency interference issue.Therefore, future communications must turn to the frequency range of higher frequency, such as millimere-wave band and Terahertz frequency range.Though
These right frequency ranges can provide bigger bandwidth, higher data rate, but also bring many processing problems simultaneously.
Multi-carrier modulation is used at present, is to be superimposed to generate by each carrier component, thus be difficult to avoid that due to sending signal
The excessively high problem of peak-to-average power ratio (PAPR).Can be lower in the efficiency of higher frequency range, power amplifier, high PAPR can further decrease function
Efficiency is put, more serious problem is caused.DFT-s-FBMC (Filter Bank Multi Carrier, filter bank multi-carrier system
System) it is a kind of technology that transmission signal peak-to-average power power ratio is effectively reduced proposed in recent years, core concept is by symbol sebolic addressing elder generation
It is input to the transmitter of FBMC communication system again after a DFT transform is transformed into frequency domain.If using single carrier modulation technique,
Very high in the data rate of high band, the D/A converter and A/D converter for converting digital signals into analog signal need very high
Sampling rate, therefore the cost of D/A converter and A/D converter is very high, causes the difficulty on realizing.
Summary of the invention
In view of the drawbacks of the prior art, it is an object of the invention to solve prior art D/A converter and A/D converter
Technical problem at high cost.
To achieve the above object, the embodiment of the invention provides a kind of data transmission methods, method includes the following steps:
Data symbol to be sent is divided into data symbols number section and serialization number by step S1.；
Step S2. carries out adding window and discrete fourier to each data symbols number section according to the serial number of data symbols number section respectively
Conversion process；
Step S3. is according to the serial number of data symbols number section, and treated that data segment carries out respectively real empty staggeredly extracts to each；
Step S4. is up-sampled and is filtered respectively to the output of each FFT frequency point, and does digital-to-analogue respectively to the result of filtering
Intermediate frequency, which is superposed to, after conversion D/A sends signal；
Intermediate frequency is sent signal after up-conversion by step S5., is sent by power amplifier and antenna.
It is specifically, described that data symbol to be sent is divided into data symbols number section, specifically:
Assuming that the complex symbol period of filter group is T, N number of data symbol is sent in the T moment, by data symbols to be sent
Number sequence is denoted as { a0,a1,a2,...}；The sliding window that the data symbol sequence to be sent will be N by length, every
N/2 point slides data intercept symbol, until the entire data symbol sequence to be sent of sliding interception, obtains according in nth data
Number section xnOn symbol are as follows:
Wherein, N is the length of the data symbols number section of each serial number, xn[k] is nth data sign field xnK-th yuan
Element.
Specifically, the windowing process, specific as follows:
To nth data sign field xnR is obtained after adding windown；
rn=Diag (w) xn
Wherein, the effect of Diag function is that diagonally matrix form, w are window vector by vector median filters, and the window is suitable
Length is equal to the length of data symbols number section, and symbol indicates multiplication of matrices operation, xnR is corresponded to after [k] adding windownK-th of element
rn(k)。
Specifically, the window vector w is w1Or w2, their k-th of element w1[k] and w2[k] is respectively indicated are as follows:
Specifically, the Fourier transformation, specific as follows:
By discrete Fourier transform, by rnIt is transformed into frequency domain form Rn；
Rn=FFT (rn)
Wherein, FFT indicates Fast Fourier Transform (FFT), and the points of the FFT are equal to the length of data symbols number section.
Specifically, step S3 is specific as follows:
For nth data sign field, passes it through after actual situation is staggeredly extracted and obtain En；
When n is even number, En[m] can be indicated are as follows:
When n is odd number, En[m] can be indicated are as follows:
Wherein, Rn[m] is treated data segment RnThe value of m-th of FFT frequency point,Function representation takes real part,Letter
Number indicates to take imaginary part, length of the N for the data symbols number section of each serial number, En[m] is EnIn m-th of element value.
Specifically, step S4 includes following sub-step:
Step S401. carries out K times on each FFT frequency point and up-samples, by the signal table of m-th of FFT frequency point after up-sampling
It is shown as Im, ImI-th of element be denoted as Im[i]；
Step S402. is to each sampled result Im[i] is filtered, and obtains the filter of m-th of FFT frequency point upsampled signal
Wave result Sm[i]；
Step 403. is to each filter result Sm[i] does digital-to-analogue conversion, and by treated, signal is expressed as Sm(t)；
Step S404. is by digital-to-analogue conversion result Sm(t) it after being modulated in corresponding centre frequency respectively, is superimposed in obtaining and takes place frequently
The number of delivering letters y (t)；
Wherein, y (t) indicates that intermediate frequency sends signal, Sm(t) indicate that the road m intermediate frequency sends signal, fmIndicate m-th of FFT frequency
The corresponding centre frequency of signal on point.
Specifically, it up-samples for described K times specifically: mend K-1 0 between the neighboring data symbols of each FFT frequency point, be located at
Initial data on m-th of FFT frequency point be [, En[m],En+1[m] ,], become after K times of up-samplingThe signal of m-th of FFT frequency point after up-sampling is expressed as Im, ImI-th
A element is denoted as Im[i]。
It is specifically, described that intermediate frequency transmission signal is passed through into up-conversion, specifically:
Wherein, z (t) indicates the transmission signal after up-conversion, fcFor the target center frequency upconverted to, f0In original
Frequency of heart.
Specifically, the receiver of the corresponding data transmission method is implemented as follows:
Signal is received after amplifier, is down-converted to intermediate-freuqncy signal；The signal extracted in each centre frequency is filtered
Demodulation, and analog-digital conversion a/d is done respectively to the demodulation road Hou Mei signal；Later, actual situation is done to each road signal staggeredly to extract；Finally
IFFT, adding window are done to each road signal, window vector is identical as transmitter, and signal sliding stack after adding window is exported.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have below beneficial to effect
Fruit:
The present invention is due to passing through serioparallel exchange, and the data rate on each subsignal is 1/N times of input data, by K times
After up-sampling, the data rate on each subsignal is K/N times of input data, by doing digital-to-analogue conversion respectively to each FFT frequency point
D/A converter is converted multiple D/A conversions (transmitter) by D/A, converts multiple A/D conversions for A/D converter and (receives
Machine), therefore the sampling rate of the D/A converter and A/D converter on each subsignal is reduced to K/N times of input data, thus greatly
The cost of D/A converter and A/D converter is reduced greatly.
Detailed description of the invention
Fig. 1 is the data transmission flow figure of transmitter provided in an embodiment of the present invention；
Fig. 2 is the data receiver flow chart of receiver provided in an embodiment of the present invention；
Fig. 3 is data symbol provided in an embodiment of the present invention according to sign field serialization schematic diagram；
Fig. 4 (a) is window vector w provided in an embodiment of the present invention1Function curve schematic diagram；
Fig. 4 (b) is window vector w provided in an embodiment of the present invention2Function curve schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention is the deformation of DFT-s-FBMC, FFT will be carried out again after data sectional to be sent, adding window, for even number sequence
Number sign field, even number serial number FFT frequency point only retain real part, and odd indexed FFT frequency point only retains imaginary part, odd number
Serial number is on the contrary.In addition, by being digital-to-analogue conversion D/A respectively to each FFT frequency point, while reducing to D/A converter sampling rate
Requirement.The present invention is added to the pretreatment to symbol sebolic addressing, to further decrease the peak-to-average power ratio for sending signal.
As shown in Figure 1, data transfer mode is implemented as follows in transmitter: input signal is cut by sliding window segmentation
Rear adding window is taken, then frequency domain is transformed by FFT, real empty staggeredly extraction is carried out to different data section, then on each FFT frequency point
Signal sampling, filtering are digital-to-analogue conversion D/A, will finally be sent after up-conversion after the superposition of each subsignal by power amplifier.
As shown in Fig. 2, the receiver of corresponding this data transfer mode is implemented as follows: receiving signal by amplifier
Afterwards, it is down-converted to intermediate-freuqncy signal；It extracts the signal in each centre frequency and is filtered demodulation, and to the demodulation road Hou Mei signal point
Analog-digital conversion a/d is not done；Later, it does actual situation to each road signal staggeredly to extract, specifically, for even number serial number data symbol
Section, even number road signal only retains real part, and odd number road signal only retains imaginary part, for odd indexed data symbols number section,
Even number road signal only retains imaginary part, and odd number road signal only retains real part；IFFT, adding window finally are done to each road signal,
Window vector is identical as transmitter, and signal sliding stack after adding window is exported.
A kind of data transmission method, method includes the following steps:
Data symbol to be sent is divided into data symbols number section and serialization number by step S1.；
Step S2. carries out adding window and discrete fourier to each data symbols number section according to the serial number of data symbols number section respectively
Conversion process；
Step S3. is according to the serial number of data symbols number section, and treated that data segment carries out respectively real empty staggeredly extracts to each；
Step S4. is up-sampled and is filtered respectively to the output of each FFT frequency point, and does digital-to-analogue respectively to the result of filtering
Intermediate frequency, which is superposed to, after conversion D/A sends signal；
Intermediate frequency is sent signal after up-conversion by step S5., is sent by power amplifier.
Data symbol to be sent is divided into data symbols number section and serialization number by step S1..
Assuming that the complex symbol period of filter group is T, N number of data symbol is sent in the T moment, by data symbols to be sent
Number sequence is denoted as { a0,a1,a2,...}.The sliding window that the data symbol sequence to be sent will be N by length, every
N/2 point slides data intercept symbol, until the entire data symbol sequence to be sent of sliding interception, obtains according in nth data
Number section xnOn symbol are as follows:
Wherein, N is the length of the data symbols number section of each serial number, and data symbol sequence to be sent is divided into multiple length
For the data symbols number section { x of N0,x1,x2... }, nth data sign field xnK-th of element be denoted as xn[k], 0≤k≤N-1.
As shown in figure 3, each data segment includes N number of symbol to sent data symbol according to sign field serialization number, and
N/2 symbol is overlapped between adjacent data section.
Step S2. carries out adding window and discrete fourier to each data symbols number section according to the serial number of data symbols number section respectively
Conversion process.
The window vector that length is N is indicated with w, to nth data sign field xnR is obtained after adding windown。
rn=Diag (w) xn
Wherein, the effect of Diag function is that diagonally matrix form, symbol indicate multiplication of matrices fortune by vector median filters
It calculates, nth data sign field xnK-th of element xnR is corresponded to after [k] adding windownK-th of element rn(k).Windowing operation be for
It is subsequent accurately to restore initial data.
Alternative window vector is denoted as w1And w2, their k-th of element w1[k] and w2[k] is respectively indicated are as follows:
By leaf transformation in N point discrete Fourier, by rnIt is transformed into frequency domain form Rn。
Rn=FFT (rn)
Wherein, FFT indicates Fast Fourier Transform (FFT), by RnThe value of m-th of FFT frequency point is denoted as Rn[m]。
Step S3. is according to the serial number of data symbols number section, and treated that data segment carries out respectively real empty staggeredly extracts to each.
For even number serial number data sign field, even number serial number FFT frequency point only retains real part, odd indexed FFT frequency point
Only retain imaginary part；For odd indexed data symbols number section, even number serial number FFT frequency point only retains imaginary part, odd indexed
FFT frequency point only retains real part, to realize that cooperation sends data between neighboring data symbols section.It is specific as follows:
For nth data sign field, the E obtained after actual situation is staggeredly extracted is passed it throughnIn m-th of element be denoted as En
[m]。
When n is even number, En[m] can be indicated are as follows:
When n is odd number, En[m] can be indicated are as follows:
Wherein,Function representation takes real part,Function representation takes imaginary part, En[m] is EnM-th of element.
Step S4. is up-sampled and is filtered respectively to the output of each FFT frequency point, and does digital-to-analogue respectively to the result of filtering
Intermediate frequency, which is superposed to, after conversion D/A sends signal.
S401. K times is carried out on each FFT frequency point to up-sample.
K-1 0 is mended between the neighboring data symbols of each FFT frequency point.The initial data being located on m-th of FFT frequency point is
[···,En[m],En+1[m] ,], become after K times of up-sampling
The signal of m-th of FFT frequency point after up-sampling is expressed as Im, ImI-th of element be denoted as Im[i]。
Step S402. is filtered each sampled result.
To Im[i] is filtered, and obtains the filter result S of m-th of FFT frequency point upsampled signalm[i], calculation formula is such as
Under:
Wherein, L is the length of filter g [i].
Step 403. does digital-to-analogue conversion to each filter result.
To the discrete signal S on each FFT frequency pointm[i] is digital-to-analogue conversion D/A respectively, and passes through necessary analog filtering,
Image signal after removing digital-to-analogue conversion D/A, by treated, signal is expressed as Sm(t)。
After digital-to-analogue conversion result is modulated in corresponding centre frequency by step S404. respectively, superposition obtains intermediate frequency and sends letter
Number.
Wherein, y (t) indicates that intermediate frequency sends signal, Sm(t) indicate that the road m intermediate frequency sends signal, fmIndicate m-th of FFT frequency
The corresponding centre frequency of signal on point.
Intermediate frequency is sent signal after up-conversion by step S5., is sent by power amplifier.
Wherein, z (t) indicates the transmission signal after up-conversion, fcFor the target center frequency upconverted to, f0In original
Frequency of heart.The y (t) and z (t) obtained by above-mentioned processing is complete single-carrier signal, and the peak-to-average power ratio of signal is low, has
Conducive to the utilization efficiency for improving power amplifier as far as possible.
Embodiment 1
The specified conditions of the present embodiment are that the data symbols number N sent in the T moment is 256, symbol sebolic addressing to be sent
akLength is 10368, wherein { a1,a2,...,a128}、{a10239,a10240,...,a10368It is 0 to play signal transition, { a129,
a130,...,a10238It is complex symbol.Under the actual conditions, implementation steps can be indicated are as follows:
(1) data symbol sequence to be sent is divided into the data symbols number section { x that 80 length are 2560,x1,...,x79,
Wherein, k-th of element of nth data sign field is denoted as xn[k]:
xn[k]=a128(n-1)+k,0≤k≤255,(n≠0)
(2) indicate that length is 256 window vector with w, to nth data sign field xnIt is obtained after adding window:
rn=Diag (w) xn
Wherein, the effect of Diag function is by vector median filters diagonally matrix form, by alternative two kinds of window vectors w
It is denoted as w1And w2, their k-th of element w1[k] and w2[k] can be respectively indicated are as follows:
The function curve of both window functions can be found in shown in Fig. 4.Wherein, Fig. 4 (a) is window vector w1Corresponding function is bent
Line, Fig. 4 (b) are window vector w2Corresponding function curve.
(3) by leaf transformation in 256 point discrete Fouriers by rnIt is transformed into frequency domain form Rn:
Rn=FFT (rn)
FFT function representation Fast Fourier Transform (FFT), by RnThe value of m-th of FFT frequency point is denoted as Rn[m]。
(4) for nth data sign field, the E obtained after actual situation is staggeredly extracted is passed it throughnIn m-th of element be denoted as En
[m]。
When n is even number, En[m] can be indicated are as follows:
When n is odd number, En[m] can be indicated are as follows:
Wherein,The effect of function is to take real part,The effect of function is to take imaginary part.EnM-th after [m] corresponding FFT
Frequency point.
(5) 4 times of up-samplings are carried out on each FFT frequency point, if initial data on m-th of FFT frequency point be [,
En[m],En+1[m] ,], become after 4 times of up-samplings [..., En[m],0,0,0,En+1[m],…].After up-sampling
The signal of m-th of FFT frequency point is expressed as Im, ImI-th of element be denoted as Im[i]。
To ImThe formula that [i] is filtered with filter g [i] are as follows:
Wherein, L is the length of filter g [i], L=7 in the present embodiment.In following simulation example, g [i] takes sine
The impulse response function of filter (g [i]=sin (π i/8), i=1,2 ..., 7).
(6) to the discrete signal S on each FFT frequency pointm[i] is digital-to-analogue conversion D/A respectively, and filters by necessary simulation
Wave, by treated, signal is expressed as Sm(t), it is modulated in corresponding centre frequency and is superimposed and obtain intermediate frequency transmission letter
Number, concrete operations formula are as follows:
Wherein, fmIndicate the corresponding centre frequency of signal on m-th of FFT frequency point.
N=256, K=4 in the present embodiment, therefore the sampling rate of single D/A converter can be the 4/ of input data
256=1/64 times, the communication of high-speed can be thus realized using multiple inexpensive D/A converters.
More than, the only preferable specific embodiment of the application, but the protection scope of the application is not limited thereto, and it is any
Within the technical scope of the present application, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
Cover within the scope of protection of this application.Therefore, the protection scope of the application should be subject to the protection scope in claims.
Claims (10)
1. a kind of data transmission method, which is characterized in that method includes the following steps:
Data symbol to be sent is divided into data symbols number section and serialization number by step S1.；
Step S2. carries out adding window and discrete Fourier transform to each data symbols number section according to the serial number of data symbols number section respectively
Processing；
Step S3. is according to the serial number of data symbols number section, and treated that data segment carries out respectively real empty staggeredly extracts to each；
Step S4. is up-sampled and is filtered respectively to the output of each FFT frequency point, and does digital-to-analogue conversion respectively to the result of filtering
It is superposed to intermediate frequency after D/A and sends signal；
Intermediate frequency is sent signal after up-conversion by step S5., is sent by power amplifier and antenna.
2. data transmission method as described in claim 1, which is characterized in that described that data symbol to be sent is divided into number
According to sign field, specifically:
Assuming that the complex symbol period of filter group is T, N number of data symbol is sent in the T moment, by data symbol sequence to be sent
Column are denoted as { a0,a1,a2,...}；The sliding window that the data symbol sequence to be sent will be N by length, every N/2 point
Data intercept symbol is slided, until the entire data symbol sequence to be sent of sliding interception, obtains in nth data sign field Xn
On symbol are as follows:
Wherein, N is the length of the data symbols number section of each serial number, xn[k] is nth data sign field XnK-th of element.
3. data transmission method as described in claim 1, which is characterized in that the windowing process, specific as follows:
To nth data sign field XnR is obtained after adding windown；
rn=Diag (w) Xn
Wherein, the effect of Diag function is that diagonally matrix form, w are window vector, the suitable length of window by vector median filters
Equal to the length of data symbols number section, symbol indicates multiplication of matrices operation, xnR is corresponded to after [k] adding windownK-th of element rn
(k)。
4. data transmission method as claimed in claim 3, which is characterized in that the window vector w is w1Or w2, their kth
A element w1[k] and w2[k] is respectively indicated are as follows:
5. data transmission method as claimed in claim 3, which is characterized in that the Fourier transformation, specific as follows:
By discrete Fourier transform, by rnIt is transformed into frequency domain form Rn；
Rn=FFT (rn)
Wherein, FFT indicates Fast Fourier Transform (FFT), and the points of the FFT are equal to the length of data symbols number section.
6. data transmission method as described in claim 1, which is characterized in that step S3 is specific as follows:
For nth data sign field, passes it through after actual situation is staggeredly extracted and obtain En；
When n is even number, En[m] can be indicated are as follows:
When n is odd number, En[m] can be indicated are as follows:
Wherein, Rn[m] is treated data segment RnThe value of m-th of FFT frequency point,Function representation takes real part,Function table
Show and take imaginary part, N is the length of the data symbols number section of each serial number, En[m] is EnIn m-th of element value.
7. data transmission method as described in claim 1, which is characterized in that step S4 includes following sub-step:
Step S401. carries out K times on each FFT frequency point and up-samples, and the signal of m-th of FFT frequency point after up-sampling is expressed as
Im, ImI-th of element be denoted as Im[i]；
Step S402. is to each sampled result Im[i] is filtered, and obtains the filtering knot of m-th of FFT frequency point upsampled signal
Fruit Sm[i]；
Step 403. is to each filter result Sm[i] does digital-to-analogue conversion, and by treated, signal is expressed as Sm(t)；
Step S404. is by digital-to-analogue conversion result Sm(t) after being modulated in corresponding centre frequency respectively, superposition obtains intermediate frequency and sends letter
Number y (t)；
Wherein, y (t) indicates that intermediate frequency sends signal, Sm(t) indicate that the road m intermediate frequency sends signal, fmIt indicates on m-th of FFT frequency point
The corresponding centre frequency of signal.
8. data transmission method as claimed in claim 7, which is characterized in that described K times up-samples specifically: in each FFT
K-1 0 is mended between the neighboring data symbols of frequency point, the initial data being located on m-th of FFT frequency point be [..., En[m],En+1
[m] ...], become after K times of up-samplingM-th after up-sampling
The signal of FFT frequency point is expressed as Im, ImI-th of element be denoted as Im[i]。
9. data transmission method as described in claim 1, which is characterized in that it is described that intermediate frequency transmission signal is passed through into up-conversion,
Specifically:
Wherein, z (t) indicates the transmission signal after up-conversion, fcFor the target center frequency upconverted to, f0For archicenter frequency
Rate.
10. data transmission method as described in claim 1, which is characterized in that the receiver of the corresponding data transmission method
It is implemented as follows:
Signal is received after amplifier, is down-converted to intermediate-freuqncy signal；It extracts the signal in each centre frequency and is filtered demodulation,
And analog-digital conversion a/d is done respectively to the demodulation road Hou Mei signal；Later, actual situation is done to each road signal staggeredly to extract；Finally to each
Road signal is IFFT, adding window, and window vector is identical as transmitter, and signal sliding stack after adding window is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092322.6A CN109951194A (en) | 2019-01-30 | 2019-01-30 | A kind of data transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092322.6A CN109951194A (en) | 2019-01-30 | 2019-01-30 | A kind of data transmission method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109951194A true CN109951194A (en) | 2019-06-28 |
Family
ID=67007444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910092322.6A Pending CN109951194A (en) | 2019-01-30 | 2019-01-30 | A kind of data transmission method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109951194A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299966A (en) * | 2019-07-26 | 2019-10-01 | 华中科技大学 | A kind of data transmission method, terminal and base station |
| CN111131141A (en) * | 2019-09-30 | 2020-05-08 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Voice encryption and decryption method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148789A (en) * | 2010-02-08 | 2011-08-10 | 清华大学 | Method and device for receiving multicarrier modulation signal |
| CN103716126A (en) * | 2012-09-28 | 2014-04-09 | 英特尔公司 | Methods and arrangements for high-speed digital-to-analog conversion |
| CN104184691A (en) * | 2013-05-24 | 2014-12-03 | 北京邮电大学 | Coherent light OFDM system receiving end high-speed data parallel processing structure and method |
| CN105933103A (en) * | 2016-04-28 | 2016-09-07 | 上海交通大学 | Light DFT-S-OFDM secure transmission system based on digital chaos |
| CN107920177A (en) * | 2017-12-28 | 2018-04-17 | 中国电子科技集团公司第五十四研究所 | A kind of Ultra-high Rate Modulation demodulator radio frequency realization device |
| CN108449301A (en) * | 2018-03-27 | 2018-08-24 | 华中科技大学 | A kind of data transmission method |
| CN108848047A (en) * | 2018-07-02 | 2018-11-20 | 重庆邮电大学 | A kind of filter bank multi-carrier transmitter implementation method |
-
2019
- 2019-01-30 CN CN201910092322.6A patent/CN109951194A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148789A (en) * | 2010-02-08 | 2011-08-10 | 清华大学 | Method and device for receiving multicarrier modulation signal |
| CN103716126A (en) * | 2012-09-28 | 2014-04-09 | 英特尔公司 | Methods and arrangements for high-speed digital-to-analog conversion |
| CN104184691A (en) * | 2013-05-24 | 2014-12-03 | 北京邮电大学 | Coherent light OFDM system receiving end high-speed data parallel processing structure and method |
| CN105933103A (en) * | 2016-04-28 | 2016-09-07 | 上海交通大学 | Light DFT-S-OFDM secure transmission system based on digital chaos |
| CN107920177A (en) * | 2017-12-28 | 2018-04-17 | 中国电子科技集团公司第五十四研究所 | A kind of Ultra-high Rate Modulation demodulator radio frequency realization device |
| CN108449301A (en) * | 2018-03-27 | 2018-08-24 | 华中科技大学 | A kind of data transmission method |
| CN108848047A (en) * | 2018-07-02 | 2018-11-20 | 重庆邮电大学 | A kind of filter bank multi-carrier transmitter implementation method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299966A (en) * | 2019-07-26 | 2019-10-01 | 华中科技大学 | A kind of data transmission method, terminal and base station |
| CN111131141A (en) * | 2019-09-30 | 2020-05-08 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Voice encryption and decryption method and device |
| CN111131141B (en) * | 2019-09-30 | 2022-04-29 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Voice encryption and decryption method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101232488B (en) | Communication method capable of reducing peak average power ratio of OFDM system | |
| EP2200244B1 (en) | Method and apparatus for multi-carrier frequency division multiplexing transmission | |
| US8406323B2 (en) | Orthogonal frequency division multiplexing using subsymbol processing | |
| CN102075483B (en) | Method for reducing peak to average power ratio of OFDM signal | |
| CN112532351B (en) | Interleaving transmission method for weighted fractional Fourier transform frequency domain two-component signal | |
| EP1856875A1 (en) | Efficient employment of digital upsampling using ifft in ofdm systems for simpler analog filtering | |
| CN104883238B (en) | A kind of carrier time division multiplexing modulation/demodulation methods and system | |
| CN102025681B (en) | Sideband information transmission method of SLM (selective mapping method) and PTS (partial transmit sequences) in OFDM (orthogonal frequency division multiplexing) system reduce peak average ratio technology | |
| CN102904854A (en) | Method and device for reducing peak-to-average power ratio in filter-bank multi-carrier system | |
| CN108270713B (en) | Multi-application scene signal multi-access method and system | |
| CN106330809A (en) | Method for restraining PAPR of optical OFDM system based on FHT and improved Mu law companding transform | |
| CN103326972A (en) | Filter bank multicarrier modulation system and design method thereof | |
| CN106656899A (en) | Method for realizing multicarrier VDE system modulation and demodulation of ship VDES system | |
| CN103297373A (en) | Constant envelope orthogonal frequency division multiplexing modulation method | |
| CN107819715A (en) | Receiver architecture for the communication system based on linear modulation | |
| CN112714090B (en) | Transmission method of weighted fractional Fourier transform extended hybrid carrier | |
| CN109951194A (en) | A kind of data transmission method | |
| AU2018451799A1 (en) | 5G multi-carrier underwater acoustic communication method | |
| CN107395544A (en) | Real number orthogonal pilot frequency sequence design method based on MIMO FBMC | |
| Park et al. | Deep learning-based automatic modulation classification with blind OFDM parameter estimation | |
| CN102148679A (en) | Low-complexity bandwidth signal digital frequency selection method | |
| CN108650005A (en) | A kind of pilot configuration and channel estimation methods in MIMO-FBMC/OQAM systems | |
| CN108449301B (en) | Data transmission method | |
| CN110061941A (en) | A kind of channel equalization method in 5G multi-carrier communications systems | |
| CN101729466B (en) | Device and method for detecting and using blank frequency spectrum with peak interference |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190628 |
|
| RJ01 | Rejection of invention patent application after publication |