CN101252566A - Method and apparatus for generating and receiving frequency domain direct enlarging - fractional number field frequency-hopping mixing signal - Google Patents
Method and apparatus for generating and receiving frequency domain direct enlarging - fractional number field frequency-hopping mixing signal Download PDFInfo
- Publication number
- CN101252566A CN101252566A CNA2008100642864A CN200810064286A CN101252566A CN 101252566 A CN101252566 A CN 101252566A CN A2008100642864 A CNA2008100642864 A CN A2008100642864A CN 200810064286 A CN200810064286 A CN 200810064286A CN 101252566 A CN101252566 A CN 101252566A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- fourier transform
- fractional
- rank
- 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.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Disclosed are frequency domain direct spread and fractional Fourier domain hopping signal generation and receiving methods and the device thereof, avoiding the defects in current frequency domain direct sequence spreading and fractional Fourier domain frequency hopping. The signal generation method includes the steps: two branches of binary numerical signals are acquired from a signal source; direct sequence spectrum spreading is carried out to the first branch of signals so as to obtain direct sequence spread spectrum signals; frequency hopping is carried out to the second branch of signals so as to obtain fractional Fourier domain frequency hopping signals; the two branches of signals are added to each other, thus getting composite spread spectrum outputting signals. The signal receiving method includes the steps: the received signals are de-hopped so as to get de-hopped signals; then the received signals sequentially undergo p-Fourier transform, peak value deprivation, fractional 2-2p-Fourier transform, peak value deprivation again, fractional p-2-Fourier transform, de-spreading and demodulation, thus getting de-spread signals; the de-spread signals and the de-hopped signals undergo parallel-to-serial conversion so as to get the original user signals. The signal generation and receiving methods and the device combine two spread spectrum techniques and increase the concealment of the system.
Description
Technical field
The present invention relates to the mixing spread spectrum technique in a kind of radio communication, be specifically related to a kind of frequency domain direct sequence-generation of fractional number field frequency-hopping mixing spread spectrum signal, the method and the device of reception.
Background technology
Direct sequence spread spectrum and frequency hopping are two kinds of common in spread spectrum communication system communication modes.These two kinds of basic spread spectrum communication systems respectively have pluses and minuses, and the advantage of directly-enlarging system is that signal good concealment, antijamming capability are strong, is fit to the wideband digital system, and shortcoming is that near-far interference is serious, can not set up with narrowband systems and communicate by letter; Good, the no obvious near-far interference of frequency-hopping system anti-multipath performance is fit to instantaneous narrowband systems, and shortcoming is that limited, the fast frequency-hopped device of disguised poor, the anti-multifrequency interference performance of signal is limited.Sometimes being difficult to satisfy system requirements when use is wherein a kind of separately, is that complementary spread spectrum technique combines with these two kinds of pluses and minuses, promptly constitutes to have more a kind of spread spectrum system of premium properties.Direct sequence/frequency hopping that Here it is (DS/FH) spread spectrum system.
Sender end in the Direct swquence spread spectrum system, data-signal waiting for transmission and pseudo noise code (spreading code) waveform multiply each other (or with pseudo-random code sequence mould 2 Hes), and the compound key of formation is modulated carrier wave, is launched by antenna then.At the receiver end, produce the synchronous local pseudo noise code of pseudo noise code in and the sender, carry out despreading to received signal, the signal after the despreading is delivered to the demodulator demodulation, recovers the signal of transmission.
Frequency-hopping system is the output frequency that removes to control discretely the radio-frequency carrier oscillator with the binary system pseudo-random code sequence, makes the frequency saltus step with the variation of pseudo noise code that transmits.Pseudo-random hop sequence control frequency hopper, make its output frequency saltus step in very wide frequency band range, claim frequency hopping pattern again, receiving terminal will produce a local pseudo random sequence synchronous with the transmitting terminal pseudo noise code, separates jumping to the received signal with pseudo random sequence control carrier oscillator.
Fractional Fourier transform (FRFT) is can be applied in the algorithm of spread-spectrum, and described fractional Fourier transform is a kind of Fourier transform of broad sense, and the expression of signal on fractional order Fourier domain comprised the signal of signal at time domain and frequency domain simultaneously.The integrated form of fractional Fourier transform is defined as:
Wherein f (t) is the time domain expression-form of signal, and the p rank fractional Fourier transform of f (t) is F
pF (u), wherein u is the score field coordinate, α=p pi/2.F (u) is common Fourier transform when α=pi/2.Because fractional Fourier transform (FRFT) is the expansion of signal on the general signal of cutting of one group of quadrature (chirp) base, so fractional Fourier transform has best energy accumulating characteristic to the given general signal (chirp) of cutting in certain fractional order Fourier domain.Promptly cut general signal (chirp) and in suitable fraction Fourier conversion territory, will show as an impulse function for one, and for Fourier transform, because basic function is sinusoidal wave, in traditional Fourier transform, can produce power not assemble so cut general signal.Wherein, the expression formula of cutting general signal is:
Parameter
f
0, k represents to cut phase place, centre frequency and the frequency change rate of general signal respectively.The pass of k and bandwidth B is B=kT, and wherein T is for cutting general signal time domain width.In practical communication system, the signal of transmitting terminal emission is a real function, gets two conjugation and cuts general signal stack, makes it become the cosine function form, and expression formula is as follows:
c(t)＝{exp[i(2πf
0t+πkt
2)]+exp[-i(2πf
0t+πkt
2)]}/2
＝cos(2πf
0t+πkt
2)。
Summary of the invention
The invention solves the shortcoming that existing frequency domain direct sequence spread spectrum and this dual mode of fractional number field frequency-hopping exist, a kind of method and signal receiving/transmission device of new mixing spread spectrum signal are provided, i.e. the generation of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal and method of reseptance and device.
The production method of the frequency domain direct enlarging-fractional number field frequency-hopping mixing signal among the present invention is:
The step that signal generates: signal source produces and sends signal c (t), and described transmission signal c (t) is obtained the two-way binary digital signal by serial/parallel conversion, and described two-way binary digital signal is respectively the first via and sends signal c
1(t) and the second the tunnel send signal c
2(t);
The first via is sent signal c
1(t) carry out the step of direct sequence spread spectrum: multiplying each other by the direct sequence that produces with the direct sequence generator obtains direct sequence signal c '
1(t), again to described direct sequence signal c '
1(t) carry out binary phase shift keying (BPSK) and then acquisition direct sequence signal s
1(t);
Send signal c to the second the tunnel
2(t) carry out the step of frequency hopping: FH Sequence Generator produces frequency hop sequences, sequential value by described frequency hop sequences produces frequency hopping pattern, output in real time has the general signal of cutting of different parameters k according to described frequency hopping pattern to cut general signal generator, and with receive the second the tunnel send signal c
2(t) carry out mixing and obtain fractional number field frequency-hopping signal s
2(t);
The step that mixing and signal send: with the direct sequence signal s that obtains in the above-mentioned steps
1(t) and fractional number field frequency-hopping signal s
2(t) addition obtains mixed spread spectrum transmission signal s (t), and described mixed spread spectrum transmission signal s (t) launches through the transmitting terminal antenna.
The method of reseptance of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal of the present invention is:
The step that signal receives: by forming received signal after reception antenna received signal and the filtering;
It is rapid to separate leapfrog: the FH Sequence Generator of receiving terminal produces and the synchronous frequency hop sequences of received signal, and the fractional Fourier transform device p rank fractional Fourier transform that disperses to received signal under the control of described frequency hop sequences obtains p rank Fourier-transformed signal r
p(u), the peak decision device is judged described p rank Fourier-transformed signal r on the fractional number Fourier field of p rank
p(u) waveform peak position, and then obtain to separate jumper connection collection of letters r
2(u);
Despreading step: in received signal, deduct and separate jumper connection collection of letters r
2(u) obtain despread signal r
1(u), detailed process is, to the p rank Fourier-transformed signal r that obtains in separating leapfrog suddenly
p(u) at p rank score field elimination peak value part signal, then to the signal 2-2p rank fractional Fourier transform that disperses, and to the signal after the conversion at 2-2p rank score field elimination peak value part signal, afterwards again to the signal p-2 rank fractional Fourier transform that disperses, obtain removing and separate jumper connection collection of letters r in time domain
2(u) the received signal r after
1' (u), produce and the synchronous direct sequence of received signal with receiving terminal direct sequence generator then, jumper connection collection of letters r is separated in removal
2(u) the received signal r after
1' (u) carry out despreading, at last the signal after the despreading is carried out demodulation and acquire despread signal r
1(u);
Signal blend step: with the despread signal r that obtains in the above-mentioned steps
1(u) conciliate jumping signal r
2(u) acquire the subscriber signal of original transmission by parallel/serial conversion.
Separate leapfrog rapid in, p value changes with the change of the sequential value of frequency hop sequences, when frequency hop sequences value change one time, the saltus step of p value once, the p value is corresponding one by one with the k value of transmitting terminal.
In separating leapfrog suddenly, the peak decision device is judged described p rank Fourier-transformed signal r
pThe detailed process of waveform peak position (u) is: output 1 when peak appears at preceding half section of score field energy spectrum, output 0 when peak appears at the second half section of score field energy spectrum.
Basic thought of the present invention is when cutting general signal | when k| gets different value, best energy accumulating characteristic is arranged on corresponding different score field.The user is divided into two tunnel modulation at transmitting terminal with signal, and this two road signal of transmission reaches resource multiplex and strengthens concealed purpose in same frequency range then.
The generation device of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal of the present invention comprises signal source 11, serial/parallel transducer 12, direct sequence spread spectrum device 13, spread spectrum modulator 15, cut general signal generator 18, FH Sequence Generator 19, first filter 17 and adder 20, the signal output part of signal source 11 is connected with the signal input part of serial/parallel transducer 12, two signal output parts of described serial/parallel transducer 12 respectively with the signal input part of direct sequence spread spectrum device 13, the signal input part of cutting general signal generator 18 connects, the signal output part of described direct sequence spread spectrum device 13 is connected with the signal input part of spread spectrum modulator 15, the signal output part of described spread spectrum modulator 15 is connected with the signal input part of first filter 17, the Frequency Hopping Signal input of the signal output part of FH Sequence Generator 19 and Qie Pu signal generator 18 is connected, the described signal output part of cutting general signal generator 18, the signal output part of first filter 17 is connected with two signal input parts of adder 20 respectively, and the signal output part of described adder 20 is exported armed output signal.
Comprise second filter 32 in the receiving system of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal of the present invention, P rank fractional Fourier transform device 33, FH Sequence Generator 34, the first fractional fourier transform domain filter 35,2-2P rank fractional Fourier transform device 36, the second fractional fourier transform domain filter 37, P-2 rank fractional Fourier transform device 38, despreader 39, extended frequency demodulator 41, the 3rd filter 43, peak value decision device 44 and parallel/serial transducer 45, a signal input part of the signal output part of second filter 32 and P rank fractional Fourier transform device 33 is connected, the Frequency Hopping Signal input of described P rank fractional Fourier transform device 33 and the signal output part of FH Sequence Generator 34 are connected, the signal output part of described P rank fractional Fourier transform device 33 respectively with the signal input part of peak value decision device 44, the signal input part of the first fractional fourier transform domain filter 35 connects, the signal output part of the described first fractional fourier transform domain filter 35 is connected with the signal input part of 2-2P rank fractional Fourier transform device 36, the signal output part of described 2-2P rank fractional Fourier transform device 36 and the signal input part of the second fractional fourier transform domain filter 37 are connected, the signal output part of the described second fractional fourier transform domain filter 37 is connected with the signal input part of P-2 rank fractional Fourier transform device 38, the signal output part of described P-2 rank fractional Fourier transform device 38 and the signal input part of despreader 39 are connected, the signal output part of described despreader 39 is connected with the signal input part of extended frequency demodulator 41, the signal output part of described extended frequency demodulator 41 is connected with the signal input part of the 3rd filter 43, the signal output part of described the 3rd filter 43, the signal output part of peak value decision device 44 is connected with two signal input parts of parallel/serial transducer 45 respectively, the output output primary signal of described parallel/serial transducer 45.
Beneficial effect of the present invention has:
One, utilizing different parameters | k| cuts general signal has best energy accumulating on corresponding not same order score field character, combine two kinds of spectrum spreading methods of direct sequence and frequency hopping, these two kinds spread spectrums excellent, that shortcoming is complementary of frequency domain direct sequence spread spectrum and fractional number field frequency-hopping are combined.Two, carry out the fractional Fourier transform of corresponding exponent number and then obtain energy accumulating according to correct frequency hopping pattern at receiving terminal, separate with the peak value judgement then and jump out correct signal.Three, the method that adopts Direct-Spread and fractional number field frequency-hopping to combine has realized channel multiplexing, promptly in identical frequency band with two kinds of modulation systems while transmitting two paths of signals.Four, two kinds of spread spectrums combine, and have strengthened system's disguise.
Description of drawings
Fig. 1 is the generation of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal of the present invention and the structural representation of receiving system; Fig. 2 is the waveform schematic diagram that carries out direct spread-spectrum, and d (t) c (t) is the waveform after expanding, the spread-spectrum signal of s (t) expression signal sending end output,
Fig. 3 cuts the waveform of the mixed spread-spectrum signal of general signal and direct sequence signal stack in time domain.Fig. 4 cuts the energy spectrum waveform of general signal at its corresponding fractional fourier transform domain; Fig. 5 cuts the energy spectrum waveform of the mixed spread-spectrum signal of general signal and direct sequence signal stack at its corresponding fractional fourier transform domain, and Fig. 6 cuts mixed spread-spectrum signal that general signal and direct sequence signal the superpose energy spectrum waveform at frequency domain.
Embodiment
Embodiment one: the production method of the frequency domain direct enlarging-fractional number field frequency-hopping mixing signal in the present embodiment is:
The step that signal generates: signal source produces and sends signal c (t), and described transmission signal c (t) is obtained the two-way binary digital signal by serial/parallel conversion, and described two-way binary digital signal is respectively the first via and sends signal c
1(t) and the second the tunnel send signal c
2(t);
The first via is sent signal c
1(t) carry out the step of direct sequence spread spectrum: multiplying each other by the direct sequence that produces with the direct sequence generator obtains direct sequence signal c '
1(t), again to described direct sequence signal c '
1(t) carry out binary phase shift keying (BPSK) and then acquisition direct sequence signal s
1(t);
Send signal c to the second the tunnel
2(t) carry out the step of frequency hopping: FH Sequence Generator produces frequency hop sequences, sequential value by described frequency hop sequences produces frequency hopping pattern, output in real time has the general signal of cutting of different parameters k according to described frequency hopping pattern to cut general signal generator, and with receive the second the tunnel send signal c
2(t) carry out mixing and obtain fractional number field frequency-hopping signal s
2(t);
The step that mixing and signal send: with the direct sequence signal s that obtains in the above-mentioned steps
1(t) and fractional number field frequency-hopping signal s
2(t) addition obtains mixed spread spectrum transmission signal s (t), and described mixed spread spectrum transmission signal s (t) launches through the transmitting terminal antenna.
Send signal c described to the second the tunnel
2(t) carry out in the step of frequency hopping, the described positive and negative establishing method of cutting general signal generator parameter k is: send signal c according to the second the tunnel
2(t) code element situation produces and cuts general signal, and generating signal when described code element is 1 is the general signal of cutting of parameter k, and generating signal when described code element is 0 is the general signal of cutting of parameter-k.
The method of reseptance of the frequency domain direct enlarging-fractional number field frequency-hopping mixing signal in the present embodiment is:
The step that signal receives: by forming received signal after reception antenna received signal and the filtering;
It is rapid to separate leapfrog: the FH Sequence Generator of receiving terminal produces and the synchronous frequency hop sequences of received signal, and the fractional Fourier transform device p rank fractional Fourier transform that disperses to received signal under the control of described frequency hop sequences obtains p rank Fourier-transformed signal r
p(u), the peak decision device is judged described p rank Fourier-transformed signal r on the fractional number Fourier field of p rank
p(u) waveform peak position, and then obtain to separate jumper connection collection of letters r
2(u);
Despreading step: in received signal, deduct and separate jumper connection collection of letters r
2(u) obtain despread signal r
1(u), detailed process is, to the p rank Fourier-transformed signal r that obtains in separating leapfrog suddenly
p(u) at p rank score field elimination peak value part signal, then to the signal 2-2p rank fractional Fourier transform that disperses, and to the signal after the conversion at 2-2p rank score field elimination peak value part signal, afterwards again to the signal p-2 rank fractional Fourier transform that disperses, obtain removing and separate jumper connection collection of letters r in time domain
2(u) the received signal r after
1' (u), produce and the synchronous direct sequence of received signal with receiving terminal direct sequence generator then, jumper connection collection of letters r is separated in removal
2(u) the received signal r after
1' (u) carry out despreading, at last the signal after the despreading is carried out demodulation and acquire despread signal r
1(u);
Signal blend step: with the despread signal r that obtains in the above-mentioned steps
1(u) conciliate jumping signal r
2(u) acquire the subscriber signal of original transmission by parallel/serial conversion.
Separate leapfrog rapid in, p value changes with the change of the sequential value of frequency hop sequences, when frequency hop sequences value change one time, the saltus step of p value once, the p value is corresponding one by one with the k value of transmitting terminal.
In separating leapfrog suddenly, the peak decision device is judged described p rank Fourier-transformed signal r
pThe detailed process of waveform peak position (u) is: output 1 when peak appears at preceding half section of score field energy spectrum, output 0 when peak appears at the second half section of score field energy spectrum.
The generation and the method for reseptance of frequency domain direct enlarging in the present embodiment and fractional number field frequency-hopping hybrid spread spectrum signal, the process that produces signal at signal sending end is signal to be sent to be divided into two-way carry out direct sequence spread spectrum and frequency hopping respectively and handle, and then will produce the transmission signal of hybrid spread spectrum after the Direct Sequence Spread Spectrum Signal that obtain and the Frequency Hopping Signal addition; At receiving terminal, extracting the synchronizing signal of carrying in the received signal produces and the synchronous frequency hop sequences of received signal local FH Sequence Generator, separate to received signal and jump into and obtain to separate the jumping signal, simultaneously, another road demodulator circuit leaches earlier the fractional number field frequency-hopping signal from received signal, use then keep synchronous direct sequence with filtering with received signal after the signal despreading, demodulation obtains despread signal again, and what will obtain at last separates jumping signal and despread signal by the parallel/serial subscriber signal that is converted to.
The generation device of the frequency domain direct enlarging-fractional number field frequency-hopping mixing signal described in the present embodiment comprises signal source 11, serial/parallel transducer 12, direct sequence spread spectrum device 13, spread spectrum modulator 15, cut general signal generator 18, FH Sequence Generator 19, first filter 17 and adder 20, the signal output part of signal source 11 is connected with the signal input part of serial/parallel transducer 12, two signal output parts of described serial/parallel transducer 12 respectively with the signal input part of direct sequence spread spectrum device 13, the signal input part of cutting general signal generator 18 connects, the signal output part of described direct sequence spread spectrum device 13 is connected with the signal input part of spread spectrum modulator 15, the signal output part of described spread spectrum modulator 15 is connected with the signal input part of first filter 17, the Frequency Hopping Signal input of the signal output part of FH Sequence Generator 19 and Qie Pu signal generator 18 is connected, the described signal output part of cutting general signal generator 18, the signal output part of first filter 17 is connected with two signal input parts of adder 20 respectively, and the signal output part of described adder 20 is exported armed output signal.
Comprise direct sequence generator and multiplier in the described direct sequence spread spectrum device 13, multiplier produces direct sequence and input signal with the direct sequence generator and multiplies each other and obtain direct sequence signal and export to spread spectrum modulator 15.
Comprise carrier signal generator and multiplier in the described spread spectrum modulator 15, multiplier is given first filter 17 with the carrier signal of input signal and the carrier signal generator output spread-spectrum signal that obtains after the modulation that multiplies each other.
Comprise in the receiving system of the frequency domain direct enlarging-fractional number field frequency-hopping mixing signal described in the present embodiment and connect second filter 32, P rank fractional Fourier transform device 33, FH Sequence Generator 34, the first fractional fourier transform domain filter 35,2-2P rank fractional Fourier transform device 36, the second fractional fourier transform domain filter 37, P-2 rank fractional Fourier transform device 38, despreader 39, extended frequency demodulator 41, the 3rd filter 43, peak value decision device 44 and parallel/serial transducer 45, a signal input part of the signal output part of second filter 32 and P rank fractional Fourier transform device 33 is connected, the Frequency Hopping Signal input of described P rank fractional Fourier transform device 33 and the signal output part of FH Sequence Generator 34 are connected, the signal output part of described P rank fractional Fourier transform device 33 respectively with the signal input part of peak value decision device 44, the signal input part of the first fractional fourier transform domain filter 35 connects, the signal output part of the described first fractional fourier transform domain filter 35 is connected with the signal input part of 2-2P rank fractional Fourier transform device 36, the signal output part of described 2-2P rank fractional Fourier transform device 36 and the signal input part of the second fractional fourier transform domain filter 37 are connected, the signal output part of the described second fractional fourier transform domain filter 37 is connected with the signal input part of P-2 rank fractional Fourier transform device 38, the signal output part of described P-2 rank fractional Fourier transform device 38 and the signal input part of despreader 39 are connected, the signal output part of described despreader 39 is connected with the signal input part of extended frequency demodulator 41, the signal output part of described extended frequency demodulator 41 is connected with the signal input part of the 3rd filter 43, the signal output part of described the 3rd filter 43, the signal output part of peak value decision device 44 is connected with two signal input parts of parallel/serial transducer 45 respectively, the original signal of output output of described parallel/serial transducer 45.
Claims (9)
1, the production method of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal is characterized in that its detailed process comprises:
The step that signal generates: signal source produces and sends signal c (t), and described transmission signal c (t) is obtained the two-way binary digital signal by serial/parallel conversion, and described two-way binary digital signal is respectively the first via and sends signal c
1(t) and the second the tunnel send signal c
2(t);
The first via is sent signal c
1(t) carry out the step of direct sequence spread spectrum: multiplying each other by the direct sequence that produces with the direct sequence generator obtains direct sequence signal c '
1(t), again to described direct sequence signal c '
1(t) carry out binary phase shift keying and then acquisition direct sequence signal s
1(t);
Send signal c to the second the tunnel
2(t) carry out the step of frequency hopping: FH Sequence Generator produces frequency hop sequences, sequential value by described frequency hop sequences produces frequency hopping pattern, output in real time has the general signal of cutting of different parameters k according to described frequency hopping pattern to cut general signal generator, and with receive the second the tunnel send signal c
2(t) carry out mixing and obtain fractional number field frequency-hopping signal s
2(t);
The step that mixing and signal send: with the direct sequence signal s that obtains in the above-mentioned steps
1(t) and fractional number field frequency-hopping signal s
2(t) addition obtains mixed spread spectrum transmission signal s (t), and described mixed spread spectrum transmission signal s (t) launches through the transmitting terminal antenna.
2, the production method of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal according to claim 1 is characterized in that sending signal c described to the second the tunnel
2(t) carry out in the step of frequency hopping, the described positive and negative establishing method of cutting general signal generator parameter k is: send signal c according to the second the tunnel
2(t) code element situation produces and cuts general signal, and generating signal when described code element is 1 is the general signal of cutting of parameter k, and generating signal when described code element is 0 is the general signal of cutting of parameter-k.
3, the method for reseptance of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal is characterized in that its detailed process comprises:
The step that signal receives: by forming received signal after reception antenna received signal and the filtering;
It is rapid to separate leapfrog: FH Sequence Generator produces and the synchronous frequency hop sequences of received signal, and the fractional Fourier transform device p rank fractional Fourier transform that disperses to received signal under the control of described frequency hop sequences obtains p rank Fourier-transformed signal r
p(u), the peak decision device is judged described p rank Fourier-transformed signal r on the fractional number Fourier field of p rank
p(u) waveform peak position, and then obtain to separate jumper connection collection of letters r
2(u);
Despreading step: in received signal, deduct and separate jumper connection collection of letters r
2(u) obtain despread signal r
1(u), detailed process is, to the p rank Fourier-transformed signal r that obtains in separating leapfrog suddenly
p(u) at p rank score field elimination peak value part signal, then to the signal 2-2p rank fractional Fourier transform that disperses, and to the signal after the conversion at 2-2p rank score field elimination peak value part signal, afterwards again to the signal p-2 rank fractional Fourier transform that disperses, obtain removing and separate jumper connection collection of letters r in time domain
2(u) the received signal r after
1' (u), produce and the synchronous direct sequence of received signal with receiving terminal direct sequence generator then, jumper connection collection of letters r is separated in removal
2(u) the received signal r after
1' (u) carry out despreading, at last the signal after the despreading is carried out demodulation and acquire despread signal r
1(u);
Signal blend step: with the despread signal r that obtains in the above-mentioned steps
1(u) conciliate jumping signal r
2(u) acquire the subscriber signal of original transmission by parallel/serial conversion.
4, the method for reseptance of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal according to claim 3, it is characterized in that the p value changes with the change of the sequential value of frequency hop sequences in separating leapfrog suddenly, when the frequency hop sequences value changes one time, the saltus step of p value once, the p value is corresponding one by one with the k value of transmitting terminal.
5, the method for reseptance of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal according to claim 3 is characterized in that the peak decision device is judged described p rank Fourier-transformed signal r in separating leapfrog suddenly
pThe detailed process of waveform peak position (u) is: output 1 when peak appears at preceding half section of score field energy spectrum, output 0 when peak appears at the second half section of score field energy spectrum.
6, the generation device of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal, it comprises signal source (11), it is characterized in that it also comprises serial/parallel transducer (12), direct sequence spread spectrum device (13), spread spectrum modulator (15), cut general signal generator (18), FH Sequence Generator (19), first filter (17) and adder (20), the signal output part of signal source (11) is connected with the signal input part of serial/parallel transducer (12), two signal output parts of described serial/parallel transducer (12) respectively with the signal input part of direct sequence spread spectrum device (13), the signal input part of cutting general signal generator (18) connects, the signal output part of described direct sequence spread spectrum device (13) is connected with the signal input part of spread spectrum modulator (15), the signal output part of described spread spectrum modulator (15) is connected with the signal input part of first filter (17), the signal output part of FH Sequence Generator (19) is connected with the Frequency Hopping Signal input of Qie Pu signal generator (18), the described signal output part of cutting general signal generator (18), the signal output part of first filter (17) is connected with two signal input parts of adder (20) respectively, and the signal output part of described adder (20) is exported armed output signal.
7, the generation device of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal according to claim 6, it is characterized in that comprising direct sequence generator and multiplier in the described direct sequence spread spectrum device (13), multiplier produces direct sequence and input signal with the direct sequence generator and multiplies each other and obtain direct sequence signal and export to spread spectrum modulator (15).
8, the generation device of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal according to claim 6, it is characterized in that comprising carrier signal generator and multiplier in the described spread spectrum modulator (15) that multiplier is given first filter (17) with the carrier signal of input signal and the carrier signal generator output spread-spectrum signal that obtains after the modulation that multiplies each other.
9, the receiving system of frequency domain direct enlarging-fractional number field frequency-hopping mixing signal, it is characterized in that it comprises second filter (32), P rank fractional Fourier transform devices (33), FH Sequence Generator (34), the first fractional fourier transform domain filter (35), 2-2P rank fractional Fourier transform devices (36), the second fractional fourier transform domain filter (37), P-2 rank fractional Fourier transform devices (38), despreader (39), extended frequency demodulator (41), the 3rd filter (43), peak value decision device (44) and parallel/serial transducer (45), a signal input part of the signal output part of second filter (32) and P rank fractional Fourier transform devices (33) is connected, the Frequency Hopping Signal input of described P rank fractional Fourier transform devices (33) is connected with the signal output part of FH Sequence Generator (34), the signal output part of described P rank fractional Fourier transform devices (33) respectively with the signal input part of peak value decision device (44), the signal input part of the first fractional fourier transform domain filter (35) connects, the signal output part of the described first fractional fourier transform domain filter (35) is connected with the signal input part of 2-2P rank fractional Fourier transform devices (36), the signal output part of described 2-2P rank fractional Fourier transform devices (36) is connected with the signal input part of the second fractional fourier transform domain filter (37), the signal output part of the described second fractional fourier transform domain filter (37) is connected with the signal input part of P-2 rank fractional Fourier transform devices (38), the signal output part of described P-2 rank fractional Fourier transform devices (38) is connected with the signal input part of despreader (39), the signal output part of described despreader (39) is connected with the signal input part of extended frequency demodulator (41), the signal output part of described extended frequency demodulator (41) is connected with the signal input part of the 3rd filter (43), the signal output part of described the 3rd filter (43), the signal output part of peak value decision device (44) is connected with two signal input parts of parallel/serial transducer (45) respectively, the original signal of output output of described parallel/serial transducer (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100642864A CN101252566B (en) | 2008-04-14 | 2008-04-14 | Method and apparatus for generating and receiving frequency domain direct enlarging - fractional number field frequency-hopping mixing signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100642864A CN101252566B (en) | 2008-04-14 | 2008-04-14 | Method and apparatus for generating and receiving frequency domain direct enlarging - fractional number field frequency-hopping mixing signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101252566A true CN101252566A (en) | 2008-08-27 |
| CN101252566B CN101252566B (en) | 2012-04-25 |
Family
ID=39955757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100642864A Expired - Fee Related CN101252566B (en) | 2008-04-14 | 2008-04-14 | Method and apparatus for generating and receiving frequency domain direct enlarging - fractional number field frequency-hopping mixing signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101252566B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888262A (en) * | 2010-06-13 | 2010-11-17 | 电子科技大学 | High-density differential frequency hopping communication method |
| CN101566690B (en) * | 2009-06-03 | 2012-01-25 | 哈尔滨工业大学 | Distance measuring method of wireless ad hoc network and distance measuring system for realizing method |
| CN101674104B (en) * | 2009-09-23 | 2013-01-09 | 电子科技大学 | Synchronous acquisition method based on PN sequence likelihood ratio in FFH system |
| CN104393891A (en) * | 2014-11-27 | 2015-03-04 | 电子科技大学 | Communication method for driving frequency spreading/frequency hopping of direct sequence by adopting information |
| CN106100695A (en) * | 2016-06-14 | 2016-11-09 | 西安电子科技大学 | A kind of pattern modulation frequency hopping Anti TBIgG method based on Constructing Chaotic Code |
| CN107769816A (en) * | 2017-11-01 | 2018-03-06 | 中山大学花都产业科技研究院 | A kind of Chirp spread spectrum communication system receivers clock synchronization system and method |
| CN109547060A (en) * | 2018-11-22 | 2019-03-29 | 北京睿信丰科技有限公司 | It jumps spread-spectrum signal emitter, jump spread-spectrum signal reception device, frequency hopping spread spectrum (FHSS) communication system and frequency hopping spread spectrum (FHSS) communication method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100365789B1 (en) * | 1998-01-20 | 2003-05-09 | 삼성전자 주식회사 | Parallel hopping direct sequence/slow frequency hopping composite cdma system |
| US6345066B1 (en) * | 1998-05-19 | 2002-02-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Reduction of access time delay in frequency-hopping radio systems using a direct sequence mode |
| CN2462618Y (en) * | 2001-01-16 | 2001-11-28 | ***电子第五十四研究所 | Extended frequency hopping signal modem |
-
2008
- 2008-04-14 CN CN2008100642864A patent/CN101252566B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566690B (en) * | 2009-06-03 | 2012-01-25 | 哈尔滨工业大学 | Distance measuring method of wireless ad hoc network and distance measuring system for realizing method |
| CN101674104B (en) * | 2009-09-23 | 2013-01-09 | 电子科技大学 | Synchronous acquisition method based on PN sequence likelihood ratio in FFH system |
| CN101888262A (en) * | 2010-06-13 | 2010-11-17 | 电子科技大学 | High-density differential frequency hopping communication method |
| CN101888262B (en) * | 2010-06-13 | 2013-08-14 | 电子科技大学 | High-density differential frequency hopping communication method |
| CN104393891A (en) * | 2014-11-27 | 2015-03-04 | 电子科技大学 | Communication method for driving frequency spreading/frequency hopping of direct sequence by adopting information |
| CN106100695A (en) * | 2016-06-14 | 2016-11-09 | 西安电子科技大学 | A kind of pattern modulation frequency hopping Anti TBIgG method based on Constructing Chaotic Code |
| CN107769816A (en) * | 2017-11-01 | 2018-03-06 | 中山大学花都产业科技研究院 | A kind of Chirp spread spectrum communication system receivers clock synchronization system and method |
| CN109547060A (en) * | 2018-11-22 | 2019-03-29 | 北京睿信丰科技有限公司 | It jumps spread-spectrum signal emitter, jump spread-spectrum signal reception device, frequency hopping spread spectrum (FHSS) communication system and frequency hopping spread spectrum (FHSS) communication method |
| CN109547060B (en) * | 2018-11-22 | 2021-03-19 | 北京睿信丰科技有限公司 | Frequency hopping spread spectrum signal transmitting device, frequency hopping spread spectrum signal receiving device, frequency hopping spread spectrum communication system and frequency hopping spread spectrum communication method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101252566B (en) | 2012-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101252566B (en) | Method and apparatus for generating and receiving frequency domain direct enlarging - fractional number field frequency-hopping mixing signal | |
| CN101594165B (en) | Hybrid spread spectrum communication system and working method thereof | |
| JP2660441B2 (en) | Receiver for spread spectrum communication | |
| US20050281318A1 (en) | Pseudo noise coded communication systems | |
| CN101252406B (en) | Anti-multiaddress interfering direct sequence spread spectrum communication system | |
| CN109246041A (en) | A kind of compound text signal broadcast control method of R-CSK dual rate | |
| US7257148B2 (en) | Radio transmitting apparatus, radio receiving apparatus, radio transmitting method, and radio receiving method | |
| CN101262249B (en) | Transmission and receiving method and device for fraction Fourier domain and frequency domain joint frequency spreading signals | |
| CN101217333B (en) | A transmission method and the corresponding acceptance method of channel resource reusing | |
| CN101252568B (en) | Frequency domain direct sequence spread-spectrum and fractional number Fourier field csep signal spread-spectrum transmitting method | |
| CN103312375B (en) | OCC (orthogonal complementary code) UWB (ultra wide band) system interference suppression method based on Chirp pulse | |
| CN109547060B (en) | Frequency hopping spread spectrum signal transmitting device, frequency hopping spread spectrum signal receiving device, frequency hopping spread spectrum communication system and frequency hopping spread spectrum communication method | |
| CN101232299B (en) | Chip signal spread spectrum sending and receiving method based on fraction Fourier transformation | |
| US20020167991A1 (en) | Transmitter, receiver, transmitting method, and receiving method | |
| CN101247142B (en) | Fractional number Fourier transform domain frequency hopping signal generating and receiving method | |
| CN101881834B (en) | System and method for receiving CBOC (Community-Based Outpatient Clinic) modulating signal | |
| CN101272157B (en) | Ultra-broadband time-derived channel multiplexing method based on fractional number Fourier transform domain | |
| JP3666018B2 (en) | Transmission device, reception device, transmission method, and reception method | |
| CN1581713A (en) | DS/SS spread spectrum communication technique for improving spread spectrum gain | |
| CN101262250B (en) | Joint transmission and receiving method for chirp direct frequency spreading signal and frequency jump signals | |
| Hasjuks et al. | Performance study of chaos-based DSSS and FHSS multi-user communication systems | |
| Harris et al. | Efficient implementation of multicarrier frequency hopping receiver via polyphase channelizer | |
| CN203872202U (en) | Code division multiplexing quadrature frequency division multiple access communication system signal reception device | |
| JP3686817B2 (en) | Code division multiple access communication method | |
| Lindenmeier et al. | A DSSS-based wireless short range data-link |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 |