CN102281244A - Anti-interference wireless digital broadcast signal transmission method for single frequency network - Google Patents
Anti-interference wireless digital broadcast signal transmission method for single frequency network Download PDFInfo
- Publication number
- CN102281244A CN102281244A CN201110247141XA CN201110247141A CN102281244A CN 102281244 A CN102281244 A CN 102281244A CN 201110247141X A CN201110247141X A CN 201110247141XA CN 201110247141 A CN201110247141 A CN 201110247141A CN 102281244 A CN102281244 A CN 102281244A
- Authority
- CN
- China
- Prior art keywords
- time domain
- single frequency
- frequency network
- wireless digital
- digital broadcast
- 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
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008054 signal transmission Effects 0.000 title claims abstract description 23
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 238000012549 training Methods 0.000 claims description 64
- 125000004122 cyclic group Chemical group 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 101100433727 Caenorhabditis elegans got-1.2 gene Proteins 0.000 claims description 9
- 238000013507 mapping Methods 0.000 claims description 8
- 238000013523 data management Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 16
- 238000004891 communication Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000005562 fading Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Abstract
The invention discloses an anti-interference wireless digital broadcast signal transmission method for a single frequency network, and belongs to a time domain, frequency domain and space domain mixed transmission scheme. The anti-interference wireless digital broadcast signal transmission method for the single frequency network has the advantages of low peak-to-average power ratio, short synchronous time, channel interference resistance, controllable multi-service and the like.
Description
Technical field
The invention belongs to wireless communication field, relate more specifically to a kind of single frequency network anti-interference wireless digital broadcast signal transmission method.
Background technology
Because of OFDM multi-carrier transmission technology has simple in structure, the availability of frequency spectrum high plurality of advantages such as becomes and extremely everybody concern and obtain deep research and the extensive use in numerous areas such as Xdsl, wide-band mobile communication, wideband wireless local area network, Digital Television wireless digital broadcasting in the time of can resisting frequency selectivity and channel.Peak-to-average power ratio (PAPR) pair amplifier that ofdm signal is higher and the range of linearity of digital to analog converter have very high requirement, therefore, the solution that must consider how to reduce the probability of occurrence of big peak power signal in the ofdm signal and reduce the nonlinear distortion influence.BICM technology (Bit Interleave coded modulation, Bit Interleaved Coded Modulation, BICM) adopt bit interleaver and feasible coding and modulated process relatively independent, diversity order is improved significantly, and makes communication system have good bit error performance under multidiameter fading channel.The networking model of employing single frequency network can improve the availability of frequency spectrum of Digital Television wireless digital broadcasting transmission system greatly.In actual single frequency network communication environment, Digital Television wireless digital broadcasting communication system performance is subjected to the influence of factors such as lock in time, clock jitter, channel fading, channel disturbance.Single frequency network anti-interference wireless digital broadcast signal transmitter transmission method is the key technology that realizes the digital broadcasting of reliable digit TV monochromatic network anti-interference wireless.Utilizing digital television single-frequency network anti-interference wireless digital broadcasting transmission system that may command multi-services such as free television broadcasting, paid television broadcasting, security information transmission, multimedia value-added service are provided is embodiments that Digital Television wireless digital broadcasting transmission system of new generation satisfies social needs.
Just be based on above background, the present invention is directed to the practical communication environment and propose a kind of single frequency network anti-interference wireless digital broadcast signal transmission method, can satisfy the needs of High Data Rate may command multi-service digital television single-frequency network anti-interference wireless digital broadcast transmission.
Desire is done more deep understanding to the patent background can be with reference to following documents and materials:
R.V.Nee，R.Prasad.“OFDM?for?wireless?multimedia?communications”.Boston：Artech?House，2000.
Y.Wu，S.Hirakawa，U.H.Reimers，and?J.Whitaker.“Overview?of?digital?television?development，”Proceedings?of?the?IEEE，Special?Issue?on?Global?Digital?Television：Technology?and?Emerging?Services，pp.8-21，Jan.2006.
U.Ladebusch?and?C.A.Liss.“Terrestrial?DVB(DVB-T)：A?broadcast?technology?for?stationary?portable?and?mobile?use，”Proceedings?of?the?IEEE，Special?Issue?on?Global?Digital?Television：Technology?and?Emerging?Services，pp.183-194，Jan.2006.
M.Takada?and?M.Saito.“Transmission?systems?for?ISDB-T，”Proceedings?of?the?IEEE，Special?Issue?on?Global?Digital?Television：Technology?and?Emerging?Services，pp.251-256，Jan.2006.
G.Caire，G.Taricco，E.Biglieri，“Bit-interleaved?coded?modulation，”IEEE?Trans.Information?Theory，vol.44，no.3，pp.927-946，May?1998.
Summary of the invention
The present invention is directed to High Data Rate may command multi-service digital television single-frequency network anti-interference wireless digital broadcasting problem, proposed a kind of single frequency network anti-interference wireless digital broadcast signal transmission method.
A kind of single frequency network anti-interference wireless digital broadcast signal transmission method that the present invention proposes is characterized in that it comprises the following steps:
1) the centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling and handled to form the input data bit flow;
2) the network data management device of single frequency network will be imported the data bit multi code Rate of Chinese character of flowing through and delete surplus convolutional encoding, Bit Interleave, code element and be modulated at and form FFT Bit Interleave coding modulation data piece on the frequency domain, FFT represents the fast discrete Fourier conversion, and the length of FFT Bit Interleave coding modulation data piece is K;
3) to adopt code check be that FFT Bit Interleave coding modulation data piece that 1 space-frequency coding device will form on frequency domain is modulated to form on each anti-interference wireless digital broadcast signal transmitter branches in the single frequency network and emptyly frequently modulates FFT Bit Interleave coding modulation data piece to the network data management device of single frequency network, and the time synchronized of adjusting each anti-interference wireless digital broadcast signal transmitter branches is all modulated FFT Bit Interleave coding modulation data piece frequently to sky at one time and handled to guarantee all transmitters in the network;
4) each anti-interference wireless digital broadcast signal transmitter in the single frequency network adopts IFFT that sky is modulated FFT Bit Interleave coding modulation data piece frequently and is transformed to the empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
Total, IFFT represents the fast discrete Fourier inverse transformation;
5) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is modulated sky frequently time domain discrete Bit Interleave coding modulation data sample value piece in order and is divided equally into two, the empty sub-piece D of time domain discrete Bit Interleave coding modulation data sample value that frequently modulates
1Frequently modulate the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value with sky
2, D
Total=[D
1, D
2];
6) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is modulated the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value by the peak-to-average power ratio adjustment unit frequently to sky
1, the empty sub-piece D of time domain discrete Bit Interleave coding modulation data sample value that frequently modulates
2Carry out that signal adds, subtracts, conjugate operation is handled and the synthetic new again empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
New, the new empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
NewAdopt following generate pattern to obtain, generate pattern 1 is D
New=[D
1, D
2], generate pattern 2 is
Generate pattern 3 is
Generate pattern 4 is
Generate pattern 5 is
Generate pattern 6 is
Generate pattern 7 is D
New=[D
* 1, D
2], generate pattern 8 is
Generate pattern 9 is
Generate pattern 10 is
Generate pattern 11 is
Generate pattern 12 is
Relatively 12 kinds of synthetic empty frequencies of generate pattern are modulated time domain discrete Bit Interleave coding modulation data sample value piece D
New, choose the empty frequency of peak-to-average power ratio that falls that wherein has minimum peak-to-average power ratio and modulate time domain discrete Bit Interleave coding modulation data sample value piece
And the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating of peak-to-average power ratio will fall
The corresponding generate pattern information that adopts send to the operational indicator sequence unit be set, wherein, D
* 1Expression is modulated the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value frequently to sky
1Each empty modulate that time domain discrete Bit Interleave coding modulation data sample value carries out that conjugate operation is handled frequently and the empty sub-piece of time domain discrete Bit Interleave coding modulation data sample value of frequently modulating that obtains;
7) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is with the real part sequence of training sequence as sequence of plural training, the operational indicator sequence is provided with the imaginary part sequence of the set operational indicator sequence in unit as sequence of plural training, on time domain, constitute the discrete sample block of sequence of plural training, training sequence, the operational indicator sequence, the length of the discrete sample block of sequence of plural training all is X, and the operational indicator sequence is comprising and unique each system parameters and business model information of expressing each anti-interference wireless digital broadcast signal transmitter in the single frequency network;
8) each anti-interference wireless digital broadcast signal transmitter in the single frequency network will repeat 4 times continuously and form time domain embedding training sequence discrete sample block on time domain in the discrete sample block of the sequence of plural training that constitutes on the time domain, time domain embeds the length of training sequence discrete sample block and falls the empty length numerically equal of frequently modulating time domain discrete Bit Interleave coding modulation data sample value piece of peak-to-average power ratio, i.e. K=4 * X;
9) each anti-interference wireless digital broadcast signal transmitter in the single frequency network will fall the empty time domain discrete Bit Interleave coding modulation data sample value piece, time domain frequently modulated of peak-to-average power ratio and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall that peak-to-average power ratio is empty frequently modulates time domain discrete Bit Interleave coding modulation data sample value piece, as frame;
10) each anti-interference wireless digital broadcast signal transmitter in the single frequency network at interval is that frame head inserts time domain and embeds training sequence and fall peak-to-average power ratio empty frequently to modulate time domain discrete Bit Interleave coding modulation data sample value piece be frame with Cyclic Prefix as protection, to form signal frame, the length of Cyclic Prefix is C;
11) each anti-interference wireless digital broadcast signal transmitter in the single frequency network adopts square root raised cosine filter that the signal pulse of signal frame is shaped;
12) each anti-interference wireless digital broadcast signal transmitter in the single frequency network forms emission of radio frequency signals to the on-air radio channel with the baseband signal up-conversion to carrier wave;
13) the anti-interference wireless digital broadcasting signal receiver in the single frequency network detect to receive radiofrequency signal that each anti-interference wireless digital broadcast signal transmitter in the single frequency network sent and its down-conversion is formed baseband signal, utilizes the architectural characteristic of the Cyclic Prefix characteristic of signal frame and signal frame to carry out baseband signal and receives and handle.
Single frequency network anti-interference wireless digital broadcast signal transmission method according to above-mentioned is characterized in that: each anti-interference wireless digital broadcast signal transmitter in the single frequency network fall that peak-to-average power ratio is empty modulates that time domain discrete Bit Interleave coding modulation data sample value piece modulates frequently by sky that the signal that the sub-piece of time domain discrete Bit Interleave coding modulation data sample value undertakies by specific 12 kinds of generate patterns adds, subtracts, conjugate operation is handled frequently and synthetic again; Have periodic time domain in the signal frame of each anti-interference wireless digital broadcast signal transmitter in the single frequency network and embed training sequence discrete sample block; The length X of the training sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network is in 512,1024,2048, corresponding empty length K of modulating FFT Bit Interleave coding modulation data piece frequently is respectively 2048,4096,8192, the frequency interval of corresponding subcarrier is respectively 4KHz, 2KHz, 1KHz, and corresponding circulating prefix-length C is respectively empty 1/4,1/8,1/16 of the FFT Bit Interleave coding modulation data block length K size of frequently modulating; The training sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network, operational indicator sequence are formed by a series of 1 or-1, have pseudo-random characteristics; Training sequence, the operational indicator sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network have orthogonality each other; Each different operational indicator sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network is comprising and unique each system parameters and business model information of expressing each anti-interference wireless digital broadcast signal transmitter in the single frequency network; The code check of space-frequency coding device is 1; The input data are carried out multi code Rate of Chinese character, and to delete the encoding rate of surplus convolutional encoding be in 1/4,1/2,5/8,3/4 and 7/8 one; Bit Interleave adopts the random interleaving mode; Code element is modulated to a kind of among QPSK, 16QAM, 32QAM and the 64QAM, and symbol constellations figure mapping mode adopts the Gray code mapping.Anti-interference wireless digital broadcasting signal receiver in the single frequency network can make full use of the Cyclic Prefix characteristic of signal frame and the architectural characteristic of signal frame is carried out baseband signal reception processing, handles comprising the time domain and frequency domain combined alternate analysis to signal frame head and signal frame body.
Characteristics of the present invention:
The present invention is the transmission plan that mix in a kind of time-domain and frequency-domain spatial domain.The empty generate pattern of modulating time domain discrete Bit Interleave coding modulation data sample value piece frequently of peak-to-average power ratio of falling of the present invention is modulated time domain discrete Bit Interleave coding modulation data sample value piece choosing method with the empty frequency of peak-to-average power ratio that falls with minimum peak-to-average power ratio, but the very high big peak power signal probability of the maximum peak power that not only can make full use of ofdm signal is very low, the real part (or imaginary part) of the ofdm signal when number of sub carrier wave is big is the characteristic of multiple Gaussian random process and whose amplitude obeys Rayleigh distribution, the amount of information of the required extra transmission of being adopted of generate pattern is little, be easy to handle the primary signal of recovering to obtain ofdm signal at receiver end, the orthogonal property that can not destroy sub-carrier signal simultaneously can not produce extra nonlinear distortion yet.Have periodic time domain in the signal frame of each anti-interference wireless digital broadcast signal transmitter in the single frequency network and embed training sequence discrete sample block, the training sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network, the operational indicator sequence has pseudo-random characteristics, the training sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network, the operational indicator sequence has orthogonality each other, it is by falling the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating of peak-to-average power ratio that the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating of peak-to-average power ratio falls in the time domain embedding training sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network, time domain embeds training sequence discrete sample block and directly superposes and form, and these have guaranteed that each wireless digital broadcasting signal receiver in the single frequency network can realize frame synchronization fast and accurately, Frequency Synchronization, time synchronized, channel transfer characteristic is estimated, and phase noise and channel transfer characteristic reliably followed the tracks of.Cyclic Prefix is inserted time domain embedding training sequence at interval as protection fall the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating of peak-to-average power ratio, can reduce the interference effect between the adjacent signals frame to form signal frame.Adopt BICM that the input data are carried out the Bit Interleave coded modulation and improved diversity order, make communication system under multidiameter fading channel, have good bit error performance.Each different operational indicator sequence of each anti-interference wireless digital broadcast signal transmitter in the single frequency network is comprising and unique each system parameters and business model information of expressing each anti-interference wireless digital broadcast signal transmitter in the single frequency network, digital television single-frequency network anti-interference wireless digital broadcasting transmission system can satisfy social needs so that can provide may command multi-services such as free television broadcasting, paid television broadcasting, security information transmission, multimedia value-added service.Transmission method of the present invention has the equal power ratio of ebb, lock in time is short, clock jitter is little, anti-channel fading, anti-channel disturbance, can provide plurality of advantages such as High Data Rate may command multi-service digital television single-frequency network anti-interference wireless digital broadcast transmission.
Description of drawings
Fig. 1 is the embodiment schematic diagram according to signal transmission between the transmitter and receiver of single frequency network anti-interference wireless digital broadcast signal transmission method of the present invention.
Fig. 2 is the embodiment schematic diagram that forms according to signal frame in the signals transmission between the transmitter and receiver of single frequency network anti-interference wireless digital broadcast signal transmission method of the present invention.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are described in detail.
The embodiment of signal transmission (supposing has N transmitter in the single frequency network) between the transmitter and receiver of the single frequency network anti-interference wireless digital broadcast signal transmission method that proposes according to the present invention as shown in Figure 1, follows these steps to carry out:
1) the centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling and handled to form the input data bit flow;
2) the network data management device of single frequency network will be imported the data bit multi code Rate of Chinese character of flowing through and delete surplus convolutional encoding, Bit Interleave, code element and be modulated at and form FFT Bit Interleave coding modulation data piece on the frequency domain, FFT represents the fast discrete Fourier conversion, and the length of FFT Bit Interleave coding modulation data piece is K; The encoding rate that multi code Rate of Chinese character is deleted surplus convolutional encoding is in 1/4,1/2,5/8,3/4 and 7/8, Bit Interleave adopts the random interleaving mode, code element is modulated to a kind of among QPSK, 16QAM, 32QAM and the 64QAM, and symbol constellations figure mapping mode adopts the Gray code mapping;
3) to adopt code check be that FFT Bit Interleave coding modulation data piece that 1 space-frequency coding device will form on frequency domain is modulated to form on each anti-interference wireless digital broadcast signal transmitter branches in the single frequency network and emptyly frequently modulates FFT Bit Interleave coding modulation data piece to the network data management device of single frequency network, and the time synchronized of adjusting each anti-interference wireless digital broadcast signal transmitter branches is all modulated FFT Bit Interleave coding modulation data piece frequently to sky at one time and handled to guarantee all transmitters in the network;
4) each anti-interference wireless digital broadcast signal transmitter in the single frequency network adopts IFFT that sky is modulated FFT Bit Interleave coding modulation data piece frequently and is transformed to the empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
Total, IFFT represents the fast discrete Fourier inverse transformation;
5) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is modulated sky frequently time domain discrete Bit Interleave coding modulation data sample value piece in order and is divided equally into two, the empty sub-piece D of time domain discrete Bit Interleave coding modulation data sample value that frequently modulates
1Frequently modulate the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value with sky
2, D
Total=[D
1, D
2];
6) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is modulated the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value by the peak-to-average power ratio adjustment unit frequently to sky
1, the empty sub-piece D of time domain discrete Bit Interleave coding modulation data sample value that frequently modulates
2Carry out that signal adds, subtracts, conjugate operation is handled and the synthetic new again empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
New, the new empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
NewAdopt following generate pattern to obtain, generate pattern 1 is D
New=[D
1, D
2], generate pattern 2 is
Generate pattern 3 is
Generate pattern 4 is
Generate pattern 5 is
Generate pattern 6 is
Generate pattern 7 is D
New=[D
* 1, D
2], generate pattern 8 is
Generate pattern 9 is
Generate pattern 10 is
Generate pattern 11 is
Generate pattern 12 is
Relatively 12 kinds of synthetic empty frequencies of generate pattern are modulated time domain discrete Bit Interleave coding modulation data sample value piece D
New, choose the empty frequency of peak-to-average power ratio that falls that wherein has minimum peak-to-average power ratio and modulate time domain discrete Bit Interleave coding modulation data sample value piece
And the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating of peak-to-average power ratio will fall
The corresponding generate pattern information that adopts send to the operational indicator sequence unit be set, wherein, D
* 1Expression is modulated the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value frequently to sky
1Each empty modulate that time domain discrete Bit Interleave coding modulation data sample value carries out that conjugate operation is handled frequently and the empty sub-piece of time domain discrete Bit Interleave coding modulation data sample value of frequently modulating that obtains;
7) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is with the real part sequence of training sequence as sequence of plural training, the operational indicator sequence is provided with the imaginary part sequence of the set operational indicator sequence in unit as sequence of plural training, on time domain, constitute the discrete sample block of sequence of plural training, training sequence, the operational indicator sequence, the length of the discrete sample block of sequence of plural training all is X, the operational indicator sequence is comprising and unique each system parameters and business model information of expressing each anti-interference wireless digital broadcast signal transmitter in the single frequency network, and X gets 512,1024, in 2048 one;
8) each anti-interference wireless digital broadcast signal transmitter in the single frequency network will repeat 4 times continuously and form time domain embedding training sequence discrete sample block on time domain in the discrete sample block of the sequence of plural training that constitutes on the time domain, time domain embeds the length of training sequence discrete sample block and falls the empty length numerically equal of frequently modulating time domain discrete Bit Interleave coding modulation data sample value piece of peak-to-average power ratio, i.e. K=4 * X; When X got 512, K got 2048, and the frequency interval of corresponding subcarrier is got 4KHz; When X got 1024, K got 4096, and the frequency interval of corresponding subcarrier is got 2KHz; When X got 2048, K got 8192, and the frequency interval of corresponding subcarrier is got 1KHz;
9) each anti-interference wireless digital broadcast signal transmitter in the single frequency network will fall the empty time domain discrete Bit Interleave coding modulation data sample value piece, time domain frequently modulated of peak-to-average power ratio and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall that peak-to-average power ratio is empty frequently modulates time domain discrete Bit Interleave coding modulation data sample value piece, as frame;
10) each anti-interference wireless digital broadcast signal transmitter in the single frequency network at interval is that frame head inserts time domain and embeds training sequence and fall peak-to-average power ratio empty frequently to modulate time domain discrete Bit Interleave coding modulation data sample value piece be frame with Cyclic Prefix as protection, to form signal frame, the length of Cyclic Prefix is C; When X got 512, C got 1/4 of K size; When X got 1024, C got 1/8 of K size; When X got 2048, C got 1/16 of K size;
11) each anti-interference wireless digital broadcast signal transmitter in the single frequency network adopts square root raised cosine filter that the signal pulse of signal frame is shaped;
12) each anti-interference wireless digital broadcast signal transmitter in the single frequency network forms emission of radio frequency signals to the on-air radio channel with the baseband signal up-conversion to carrier wave;
13) the anti-interference wireless digital broadcasting signal receiver in the single frequency network detect to receive radiofrequency signal that each anti-interference wireless digital broadcast signal transmitter in the single frequency network sent and its down-conversion is formed baseband signal, utilizes the architectural characteristic of the Cyclic Prefix characteristic of signal frame and signal frame to carry out baseband signal and receives and handle.
Embodiment according to signal frame formation (supposing has N transmitter in the single frequency network) in the signals transmission between the transmitter and receiver of single frequency network anti-interference wireless digital broadcast signal transmission method of the present invention, as shown in Figure 2, specifically implement as follows:
The centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling and handled to form the input data bit flow.
The network data management device of single frequency network will be imported the data bit multi code Rate of Chinese character of flowing through and delete surplus convolutional encoding, Bit Interleave, code element and be modulated at and form FFT Bit Interleave coding modulation data piece on the frequency domain; The encoding rate that multi code Rate of Chinese character is deleted surplus convolutional encoding is in 1/4,1/2,5/8,3/4 and 7/8, Bit Interleave adopts the random interleaving mode, code element is modulated to a kind of among QPSK, 16QAM, 32QAM and the 64QAM, and symbol constellations figure mapping mode adopts the Gray code mapping; Adopting code check is that FFT Bit Interleave coding modulation data piece that 1 space-frequency coding device will form on frequency domain is modulated to form on each anti-interference wireless digital broadcast signal transmitter branches in the single frequency network and emptyly frequently modulates FFT Bit Interleave coding modulation data piece, and the time synchronized of adjusting each anti-interference wireless digital broadcast signal transmitter branches is all modulated FFT Bit Interleave coding modulation data piece frequently to sky at one time and handled to guarantee all transmitters in the network; Through IFFT it is transformed to the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating again, generates and choose the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating of peak-to-average power ratio that falls that wherein has minimum peak-to-average power ratio by the peak-to-average power ratio adjustment unit and simultaneously the generate pattern information of the corresponding employing of institute is sent to the operational indicator sequence unit is set.Empty frequency is modulated FFT Bit Interleave coding modulation data piece and is made up of subcarrier.Empty length of modulating FFT Bit Interleave coding modulation data piece frequently is K; When X got 512, corresponding K got 2048, and the frequency interval of corresponding subcarrier is got 4KHz; When X got 1024, corresponding K got 4096, and the frequency interval of corresponding subcarrier is got 2KHz; When X got 2048, corresponding K got 8192, and the frequency interval of corresponding subcarrier is got 1KHz.Each anti-interference wireless digital broadcast signal transmitter in the single frequency network with training sequence as the real part sequence of sequence of plural training, with the imaginary part sequence of operational indicator sequence as sequence of plural training, on time domain, constitute the discrete sample block of sequence of plural training, on time domain, it is repeated 4 times continuously again and form time domain embedding training sequence discrete sample block.The length of the discrete sample block of training sequence, operational indicator sequence, sequence of plural training all is X, and X gets in 512,1024,2048, and the length that time domain embeds training sequence discrete sample block is K, K=4 * X.Training sequence, operational indicator sequence as each anti-interference wireless digital broadcast signal transmitter in the single frequency network are formed by a series of 1 or-1, have pseudo-random characteristics, and training sequence, operational indicator sequence have orthogonality each other; The training sequence that satisfies above-mentioned feature can be by realizing as one group of displacement m sequence of a kind of specific type of pseudo-random number sequence with as the walsh sequence of orthogonal sequence, Hadamard sequences or by the orthogonal sequence that other modes produce; Each different operational indicator sequence is comprising and unique each system parameters and business model information of expressing each anti-interference wireless digital broadcast signal transmitter in the single frequency network.Each anti-interference wireless digital broadcast signal transmitter in the single frequency network will fall the empty time domain discrete Bit Interleave coding modulation data sample value piece, time domain frequently modulated of peak-to-average power ratio and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall that peak-to-average power ratio is empty frequently modulates time domain discrete Bit Interleave coding modulation data sample value piece, as frame; Fall empty frequently modulation of peak-to-average power ratio at time domain embedding training sequence and insert Cyclic Prefix in the time domain discrete Bit Interleave coding modulation data sample value piece, form signal frame as the protection interval.Length as protection Cyclic Prefix at interval is C; When X got 512, corresponding C got 1/4 of K size; When X got 1024, corresponding C got 1/8 of K size; When X got 2048, corresponding C got 1/16 of K size.Each anti-interference wireless digital broadcast signal transmitter in the single frequency network adopts square root raised cosine filter that the signal of signal frame is carried out pulse shaping.When X got 512, the rolloff-factor that corresponding signal to signal frame carries out the square root raised cosine filter of pulse shaping got 0.1; When X got 1024, the rolloff-factor that corresponding signal to signal frame carries out the square root raised cosine filter of pulse shaping got 0.05; When X got 2048, the rolloff-factor that corresponding signal to signal frame carries out the square root raised cosine filter of pulse shaping got 0.025.
Each anti-interference wireless digital broadcast signal transmitter in the single frequency network forms emission of radio frequency signals to the on-air radio channel with the baseband signal up-conversion to carrier wave.
Anti-interference wireless digital broadcasting signal receiver in the single frequency network detects and receives radiofrequency signal that each anti-interference wireless digital broadcast signal transmitter in the single frequency network sent and its down-conversion is formed baseband signal, utilize the Cyclic Prefix characteristic of signal frame and the architectural characteristic of signal frame to carry out baseband signal reception processing, handle comprising time domain and frequency domain combined alternate analysis to signal frame head and signal frame body.
In conjunction with the accompanying drawings specific embodiments of the invention are had been described in detail above, but the present invention is not limited to the foregoing description, under the spirit and scope situation of the claim that does not break away from the application, those skilled in the art can make various modifications or remodeling.
Claims (8)
1. a single frequency network anti-interference wireless digital broadcast signal transmission method is characterized in that it comprises the following steps:
1) the centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling and handled to form the input data bit flow;
2) the network data management device of single frequency network will be imported the data bit multi code Rate of Chinese character of flowing through and delete surplus convolutional encoding, Bit Interleave, code element and be modulated at and form FFT Bit Interleave coding modulation data piece on the frequency domain, FFT represents the fast discrete Fourier conversion, and the length of FFT Bit Interleave coding modulation data piece is K;
3) to adopt code check be that FFT Bit Interleave coding modulation data piece that 1 space-frequency coding device will form on frequency domain is modulated to form on each anti-interference wireless digital broadcast signal transmitter branches in the single frequency network and emptyly frequently modulates FFT Bit Interleave coding modulation data piece to the network data management device of single frequency network, and the time synchronized of adjusting each anti-interference wireless digital broadcast signal transmitter branches is all modulated FFT Bit Interleave coding modulation data piece frequently to sky at one time and handled to guarantee all transmitters in the network;
4) each anti-interference wireless digital broadcast signal transmitter in the single frequency network adopts IFFT that sky is modulated FFT Bit Interleave coding modulation data piece frequently and is transformed to the empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
Total, IFFT represents the fast discrete Fourier inverse transformation;
5) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is modulated sky frequently time domain discrete Bit Interleave coding modulation data sample value piece in order and is divided equally into two, the empty sub-piece D of time domain discrete Bit Interleave coding modulation data sample value that frequently modulates
1Frequently modulate the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value with sky
2, D
Total=[D
1, D
2];
6) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is modulated the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value by the peak-to-average power ratio adjustment unit frequently to sky
1, the empty sub-piece D of time domain discrete Bit Interleave coding modulation data sample value that frequently modulates
2Carry out that signal adds, subtracts, conjugate operation is handled and the synthetic new again empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
New, the new empty time domain discrete Bit Interleave coding modulation data sample value piece D that frequently modulates
NewAdopt following generate pattern to obtain, generate pattern 1 is D
New=[D
1, D
2], generate pattern 2 is
Generate pattern 3 is
Generate pattern 4 is
Generate pattern 5 is
Generate pattern 6 is
Generate pattern 7 is D
New=[D
* 1, D
2], generate pattern 8 is
Generate pattern 9 is
Generate pattern 10 is
Generate pattern 11 is
Generate pattern 12 is
Relatively 12 kinds of synthetic empty frequencies of generate pattern are modulated time domain discrete Bit Interleave coding modulation data sample value piece D
New, choose the empty frequency of peak-to-average power ratio that falls that wherein has minimum peak-to-average power ratio and modulate time domain discrete Bit Interleave coding modulation data sample value piece
And the empty time domain discrete Bit Interleave coding modulation data sample value piece of frequently modulating of peak-to-average power ratio will fall
The corresponding generate pattern information that adopts send to the operational indicator sequence unit be set, wherein, D
* 1Expression is modulated the sub-piece D of time domain discrete Bit Interleave coding modulation data sample value frequently to sky
1Each empty modulate that time domain discrete Bit Interleave coding modulation data sample value carries out that conjugate operation is handled frequently and the empty sub-piece of time domain discrete Bit Interleave coding modulation data sample value of frequently modulating that obtains;
7) each anti-interference wireless digital broadcast signal transmitter in the single frequency network is with the real part sequence of training sequence as sequence of plural training, the operational indicator sequence is provided with the imaginary part sequence of the set operational indicator sequence in unit as sequence of plural training, on time domain, constitute the discrete sample block of sequence of plural training, training sequence, the operational indicator sequence, the length of the discrete sample block of sequence of plural training all is X, and the operational indicator sequence is comprising and unique each system parameters and business model information of expressing each anti-interference wireless digital broadcast signal transmitter in the single frequency network;
8) each anti-interference wireless digital broadcast signal transmitter in the single frequency network will repeat 4 times continuously and form time domain embedding training sequence discrete sample block on time domain in the discrete sample block of the sequence of plural training that constitutes on the time domain, time domain embeds the length of training sequence discrete sample block and falls the empty length numerically equal of frequently modulating time domain discrete Bit Interleave coding modulation data sample value piece of peak-to-average power ratio, i.e. K=4 * X;
9) each anti-interference wireless digital broadcast signal transmitter in the single frequency network will fall the empty time domain discrete Bit Interleave coding modulation data sample value piece, time domain frequently modulated of peak-to-average power ratio and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall that peak-to-average power ratio is empty frequently modulates time domain discrete Bit Interleave coding modulation data sample value piece, as frame;
10) each anti-interference wireless digital broadcast signal transmitter in the single frequency network at interval is that frame head inserts time domain and embeds training sequence and fall peak-to-average power ratio empty frequently to modulate time domain discrete Bit Interleave coding modulation data sample value piece be frame with Cyclic Prefix as protection, to form signal frame, the length of Cyclic Prefix is C;
11) each anti-interference wireless digital broadcast signal transmitter in the single frequency network adopts square root raised cosine filter that the signal pulse of signal frame is shaped;
12) each anti-interference wireless digital broadcast signal transmitter in the single frequency network forms emission of radio frequency signals to the on-air radio channel with the baseband signal up-conversion to carrier wave;
13) the anti-interference wireless digital broadcasting signal receiver in the single frequency network detect to receive radiofrequency signal that each anti-interference wireless digital broadcast signal transmitter in the single frequency network sent and its down-conversion is formed baseband signal, utilizes the architectural characteristic of the Cyclic Prefix characteristic of signal frame and signal frame to carry out baseband signal and receives and handle.
2. by the single frequency network anti-interference wireless digital broadcast signal transmission method of claim 1, it is characterized in that: the length X of the discrete sample block of the training sequence of each anti-interference wireless digital broadcast signal transmitter in the described single frequency network, operational indicator sequence, sequence of plural training is got in 512,1024,2048.
3. by the single frequency network anti-interference wireless digital broadcast signal transmission method of claim 2, it is characterized in that: described training sequence, operational indicator sequence are formed by a series of 1 or-1, have pseudo-random characteristics.
4. by the single frequency network anti-interference wireless digital broadcast signal transmission method of claim 2, it is characterized in that: described training sequence, operational indicator sequence have orthogonality each other.
5. press the single frequency network anti-interference wireless digital broadcast signal transmission method of claim 1, it is characterized in that: describedly the input data are carried out multi code Rate of Chinese character delete the multi code Rate of Chinese character of surplus convolutional encoding, Bit Interleave, code element modulation treatment to delete the encoding rate of surplus convolutional encoding be in 1/4,1/2,5/8,3/4 and 7/8 one, Bit Interleave adopts the random interleaving mode, code element is modulated to a kind of among QPSK, 16QAM, 32QAM and the 64QAM, and symbol constellations figure mapping mode adopts the Gray code mapping.
6. by the single frequency network anti-interference wireless digital broadcast signal transmission method of claim 1, it is characterized in that: described empty frequency is modulated FFT Bit Interleave coding modulation data piece and is made up of subcarrier; When X got 512, sub-carrier number got 2048, and the frequency interval of subcarrier is got 4KHz; When X got 1024, sub-carrier number got 4096, and the frequency interval of subcarrier is got 2KHz; When X got 2048, sub-carrier number got 8192, and the frequency interval of subcarrier is got 1KHz.
7. by the single frequency network anti-interference wireless digital broadcast signal transmission method of claim 1, it is characterized in that: the length C value of described Cyclic Prefix is relevant with the X value; When X got 512, C got 1/4 of K size; When X got 1024, C got 1/8 of K size; When X got 2048, C got 1/16 of K size.
8. press the single frequency network anti-interference wireless digital broadcast signal transmission method of claim 1, it is characterized in that: the baseband signal that described single frequency network anti-interference wireless digital broadcasting signal receiver is carried out receives to be handled, and one of them step is that the time domain and frequency domain combined alternate analysis of signal frame head and signal frame body is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247141 CN102281244B (en) | 2011-08-22 | 2011-08-22 | Anti-interference wireless digital broadcast signal transmission method for single frequency network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247141 CN102281244B (en) | 2011-08-22 | 2011-08-22 | Anti-interference wireless digital broadcast signal transmission method for single frequency network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102281244A true CN102281244A (en) | 2011-12-14 |
| CN102281244B CN102281244B (en) | 2013-07-24 |
Family
ID=45106427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110247141 Active CN102281244B (en) | 2011-08-22 | 2011-08-22 | Anti-interference wireless digital broadcast signal transmission method for single frequency network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102281244B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780541A (en) * | 2014-01-13 | 2014-05-07 | 宁波大学 | Single-frequency network anti-interference wireless digital broadcasting signal transmission method |
| CN114268531A (en) * | 2021-12-30 | 2022-04-01 | 深圳智微电子科技有限公司 | Single tone interference detection and elimination method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100080311A1 (en) * | 2008-10-01 | 2010-04-01 | Harris Corporation | Orthogonal frequency division multiplexing (ofdm) communications device and method that incorporates low papr preamble and receiver channel estimate circuit |
| CN101778080A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Multimedia broadcast wireless signal transmission method |
| CN101778079A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Multimedia broadcast wireless signal anti-jamming transmission method |
| CN101778085A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Method for transmitting anti-interference wireless multi-media broadcast signal in single frequency network |
| CN101778078A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Anti-jamming wireless multimedia broadcasting signal transmission method |
| CN101815050A (en) * | 2010-03-03 | 2010-08-25 | 宁波大学 | Multimedia broadcasting wireless signal single-frequency network anti-jamming transmission method |
-
2011
- 2011-08-22 CN CN 201110247141 patent/CN102281244B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100080311A1 (en) * | 2008-10-01 | 2010-04-01 | Harris Corporation | Orthogonal frequency division multiplexing (ofdm) communications device and method that incorporates low papr preamble and receiver channel estimate circuit |
| CN101778080A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Multimedia broadcast wireless signal transmission method |
| CN101778079A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Multimedia broadcast wireless signal anti-jamming transmission method |
| CN101778085A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Method for transmitting anti-interference wireless multi-media broadcast signal in single frequency network |
| CN101778078A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Anti-jamming wireless multimedia broadcasting signal transmission method |
| CN101815050A (en) * | 2010-03-03 | 2010-08-25 | 宁波大学 | Multimedia broadcasting wireless signal single-frequency network anti-jamming transmission method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780541A (en) * | 2014-01-13 | 2014-05-07 | 宁波大学 | Single-frequency network anti-interference wireless digital broadcasting signal transmission method |
| CN114268531A (en) * | 2021-12-30 | 2022-04-01 | 深圳智微电子科技有限公司 | Single tone interference detection and elimination method |
| CN114268531B (en) * | 2021-12-30 | 2023-08-04 | 深圳智微电子科技有限公司 | Method for detecting and eliminating single-tone interference |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102281244B (en) | 2013-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102263731A (en) | Method for transmitting anti-fading wireless signals of digital broadcast single-frequency network | |
| CN102238131B (en) | Anti-interference radio signal framing modulation method for multimedia broadcast single-frequency network | |
| CN102299890B (en) | Multimedia broadcasting wireless signal anti-interference framing modulation method | |
| CN102394852B (en) | Single-frequency network anti-fading wireless multimedia broadcasting signal framing modulation method | |
| CN102255863B (en) | Anti-noise digital mobile broadcast signal transmitting method | |
| CN102281244B (en) | Anti-interference wireless digital broadcast signal transmission method for single frequency network | |
| CN102244638A (en) | Anti-interference wireless multimedia broadcast signal framing modulation method for single frequency network | |
| CN102263743B (en) | Anti-interference mobile multimedia broadcast signal framing modulation method for single-frequency network | |
| CN102281246B (en) | Anti-fading method for transmitting wireless digital broadcast signal in single frequency network | |
| CN102263759B (en) | Method for transmitting anti-interference mobile signals of digital broadcast single-frequency network | |
| CN102307171A (en) | Anti-interference wireless multimedia broadcast signal framing modulation method | |
| CN102307172B (en) | Framing and modulating method for robustness wireless multimedia broadcast signal with single frequency network | |
| CN102263738B (en) | Anti-interference transmission method for digital broadcast wireless signal | |
| CN102263747B (en) | Method for transmitting robust mobile digital broadcast signals in single frequency network | |
| CN102263763B (en) | Mobile signal transmission method for digital broadcast single-frequency network | |
| CN102263727B (en) | Interference-resistance framing modulation method for mobile signals of multimedia broadcasting single frequency network | |
| CN102263748B (en) | Anti-interference mobile digital broadcast signal transmission method for single-frequency network | |
| CN102263733B (en) | Anti-interference wireless signal transmission method for digital broadcast single-frequency network | |
| CN102263745A (en) | Method for modulating framing of mobile multimedia broadcast signals of single-frequency network | |
| CN102263741B (en) | Method for framing and modulating anti-fading mobile multimedia broadcasting signal of single frequency network | |
| CN102281245B (en) | Single frequency network robustness wireless digital broadcast signal transmission method | |
| CN102263754B (en) | Anti-interference transmission method of mobile digital broadcast signals | |
| CN102263749B (en) | Anti-fading mobile digital broadcast signal transmission method for single-frequency network | |
| CN102255854B (en) | Anti-interference method for transmitting wireless digital broadcast signal | |
| CN102263742A (en) | Robust framing modulation method for mobile multi-media broadcast signals of single frequency network |
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 | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cao Aifang Inventor after: Su Jing Inventor before: Zheng Ziwei Inventor before: Xu Tiefeng Inventor before: Nie Qiuhua Inventor before: He Jiaming |
|
| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170929 Address after: 102600, room 2, building 2212, pop Center, Xinghua street, Beijing, Daxing District Patentee after: Beijing Yong Bo Technology Co.,Ltd. Address before: 315211 Zhejiang Province, Ningbo Jiangbei District Fenghua Road No. 818 Patentee before: Ningbo University Effective date of registration: 20170929 Address after: 300000 Tianjin city Baodi District Jingyuan BaiCaoYuan Baoxin 3-3-501 Co-patentee after: Su Jing Patentee after: Cao Aifang Address before: 102600, room 2, building 2212, pop Center, Xinghua street, Beijing, Daxing District Patentee before: Beijing Yong Bo Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180918 Address after: 570228 No. 58 Renmin Avenue, Hainan, Haikou Patentee after: Hainan University Address before: 300000 Baoxin Jingyuan Baoxi garden, Baodi District, Tianjin, 3-3-501 Co-patentee before: Su Jing Patentee before: Cao Aifang |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180920 Address after: 570228 No. 58 Renmin Avenue, Hainan, Haikou Patentee after: Hainan University Address before: 300000 Baoxin Jingyuan Baoxi garden, Baodi District, Tianjin, 3-3-501 Co-patentee before: Su Jing Patentee before: Cao Aifang |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20181121 Address after: 313000 Building No. 19, Venture Park for Small and Medium-sized Enterprises, Wuxing District, Huzhou City, Zhejiang Province, Wuxing District, Balidian Town, Wuxing District Patentee after: ZHEJIANG DENENG LOGISTICS EQUIPMENT TECHNOLOGY CO.,LTD. Address before: 570228 No. 58 Renmin Avenue, Hainan, Haikou Patentee before: Hainan University |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181206 Address after: Room 1402, Ziyang Building, 99 Mingzhu Road, Huaishang District, Bengbu City, Anhui Province Patentee after: Bengbu HRABERO Intellectual Property Service Co.,Ltd. Address before: 313000 Building No. 19, Venture Park for Small and Medium-sized Enterprises, Wuxing District, Huzhou City, Zhejiang Province, Wuxing District, Balidian Town, Wuxing District Patentee before: ZHEJIANG DENENG LOGISTICS EQUIPMENT TECHNOLOGY CO.,LTD. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20190925 Address after: Room 501, Office Building of Market Supervision Bureau of Langchuan Avenue, Jianping Town, Langxi County, Xuancheng City, Anhui Province Patentee after: Xuancheng Geith Intellectual Property Operations Co.,Ltd. Address before: Room 1402, Ziyang Building, 99 Mingzhu Road, Huaishang District, Bengbu City, Anhui Province Patentee before: Bengbu HRABERO Intellectual Property Service Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201204 Address after: Ji'an City, Jiangxi province 343900 area Suichuan County Yunling industry Patentee after: JIANGXI SUICHUAN TONGMING ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: Room 501, Office Building of Market Supervision Bureau of Langchuan Avenue, Jianping Town, Langxi County, Xuancheng City, Anhui Province Patentee before: Xuancheng Geith Intellectual Property Operations Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230707 Address after: No. 60, North Area, Shaziling Industrial Park, Suichuan County, Ji'an City, Jiangxi Province, 343900 Patentee after: JIANGXI YIXIN PHARMACEUTICAL Co.,Ltd. Address before: 343900 Yunling industrial concentration area, Suichuan County, Ji'an, Jiangxi Patentee before: JIANGXI SUICHUAN TONGMING ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240116 Address after: 343900 East Industrial Park, Suichuan County, Ji'an City, Jiangxi Province Patentee after: Jiangxi Ruizhihe Medical Instrument Co.,Ltd. Address before: No. 60, North Area, Shaziling Industrial Park, Suichuan County, Ji'an City, Jiangxi Province, 343900 Patentee before: JIANGXI YIXIN PHARMACEUTICAL Co.,Ltd. |