CN102082753A - Detection method and device of transmitter identification sequence - Google Patents
Detection method and device of transmitter identification sequence Download PDFInfo
- Publication number
- CN102082753A CN102082753A CN2009102414212A CN200910241421A CN102082753A CN 102082753 A CN102082753 A CN 102082753A CN 2009102414212 A CN2009102414212 A CN 2009102414212A CN 200910241421 A CN200910241421 A CN 200910241421A CN 102082753 A CN102082753 A CN 102082753A
- Authority
- CN
- China
- Prior art keywords
- sender unit
- unit identification
- sequence
- transmitter
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
Abstract
The invention provides a detection method of transmitter identification sequences, comprising the following steps of: detecting effective multipath positioned on a receiver according to a received synchronizing signal; intercepting the transmitter identification sequences of transmitters aiming at each effective path, and judging identification numbers and the signal strength of the transmitters aiming at the transmitter identification sequence which correspond to each effective path. The invention also provides a detection device of the transmitter identification sequences. The invention can conveniently detect the effective multipath positioned on the position of the receiver and fast finds the corresponding transmitter identification sequences according to the conditions of the effective multipath, thereby obtaining the identification numbers and the signal strength of all transmitters and fast and accurately judging the sources of received signals of a receiving end.
Description
Technical field
The present invention relates to digital information transmission technical field, particularly relate to a kind of detection method and device based on sender unit identification sequence in the digit broadcasting system of OFDM (Orthogonal Frequency Division Multiplexing, OFDM).
Background technology
OFDM is as a kind of multi-carrier modulation method, and its main thought is that N subcarrier is divided into N subchannel to whole channel, N subchannel parallel transmission information.Ofdm system has many very noticeable advantages.The first, OFDM has the very high availability of frequency spectrum.Common FDM (Frequency Division Multiplexing; frequency division multiplex) system is in order to separate the signal of each subchannel; certain protection need be set at interval at adjacent interchannel; so that receiving terminal can be isolated the signal of respective sub-channel with band pass filter, caused the waste of frequency spectrum resource.Not only do not protect frequency band between each subchannel of ofdm system; and the main lobe of the frequency spectrum of signal is also overlapped but frequency spectrum each sub-channel signal is mutually orthogonal on frequency domain between adjacent channel; each subcarrier is quadrature on time domain, and the separation of each sub-channel signal of ofdm system is finished by this orthogonality.In addition, can also adopt the multi-system modulation on each subchannel of OFDM, further improve the spectrum efficiency of ofdm system.The second, realize fairly simple.When adopting QAM or MPSK modulation system on the subchannel, modulated process can be finished with IFFT, and demodulating process can be finished with FFT, both need not organize oscillation source more, again without the band pass filter component from signal.The 3rd, the anti-multipath interference performance is strong, and anti-fading ability is strong.Because general ofdm system all adopts CP (Cyclic Prefix, Cyclic Prefix) mode, make its intersymbol interference of causing of the multipath transmisstion of erasure signal fully under certain condition, eliminate the destruction of multipath transmisstion fully, so ofdm system has good anti-multipath interference performance to the intercarrier orthogonality.
OFDM has been used in the several wireless system standards at present, for example European digital audio and digital video broadcast system (DAB, DVB-T, DVB-H), 5GHz high data rate Wireless LAN system etc.
Digital broadcasting is except broad covered area, program capacity are big, and maximum characteristics have broadcasting exactly, and a bit to multiple spot, point-to-area, the cost of broadcast message and number of users have nothing to do.Therefore, digital broadcasting has critical role as an important component part of ICT industry in national information infrastructure construction, realization universal service and national information security strategy.
In digital broadcasting service, usually the whole nation is divided into different districts, can dispose several broadcast signal transmission machines in the district.In digit broadcasting system, receiving terminal is known the source of received signal for convenience, can add one section sender unit identification sequence usually in signal.Therefore need provide a kind of apparatus and method that above-mentioned sender unit identification sequence is detected, thereby realize searching out fast corresponding sender unit identification sequence, and can differentiate the signal strength signal intensity of sender unit identification number and each transmitter simultaneously, and then judge the source of receiving terminal received signal.
Summary of the invention
For addressing the above problem, first purpose of the present invention provides a kind of sender unit identification sequence detecting method, and this method can detect effective multipath at receiver place, and at each effective diameter, judges the identification number and the signal strength signal intensity of each transmitter.
Second purpose of the present invention provides a kind of sender unit identification sequence detecting apparatus, this device utilizes synchronizing sequence, can detect effective multipath of receiver present position easily, and according to effective multipath situation, corresponding sender unit identification sequence be can search out fast, and then the identification number and the signal strength signal intensity of all transmitters obtained.
For realizing above-mentioned purpose of the present invention, according to a fermentation of the present invention, the invention provides a kind of sender unit identification sequence detecting method, it comprises the steps: to detect effective multipath at receiver place according to the synchronous received signal of having obtained; At each effective diameter, intercept the sender unit identification sequence of each transmitter; And, judge the identification number and the signal strength signal intensity of each transmitter at the sender unit identification sequence of each effective diameter correspondence.
According to another fermentation of the present invention, the invention provides a kind of device that detects the sender unit identification sequence, it comprises: the module that is used to detect effective multipath of receiver present position; Link to each other, be used to intercept the interception module of the transmit identification signal of the corresponding reception transmit identification signal of each effective diameter with the module that detects effective multipath; And the sender unit identification number that is used to differentiate each effective diameter correspondence, number, the identification number of place, statistics receiver position transmitter, and the identification number and the signal strength signal intensity judge module of each transmitter of each transmitter signal strength of accumulative total.
Have following characteristics according to sender unit identification sequence detecting method of the present invention and device:
(1) utilizes synchronizing sequence, can detect effective multipath of receiver present position easily;
(2),, can search out corresponding sender unit identification sequence fast at each effective diameter according to beacon infrastructure;
(3) identification number and the signal strength signal intensity of all transmitters of receiver position can be detected simultaneously, thereby the source of received signal can be conveniently known.
Description of drawings
Fig. 1 is the beacon infrastructure figure in the CMMB system;
Fig. 2 is for generating the flow chart of sender unit identification sequence;
The make a living flow chart of growth synchronizing sequence of Fig. 3;
Fig. 4 is according to sender unit identification Sequence Detection flow chart of the present invention;
Fig. 5 is the flow chart that the effective multipath shown in Fig. 4 detects;
Fig. 6 is the intercepting flow chart of the transmit identification sequence of each transmitter shown in Fig. 4;
Fig. 7 judges the flow chart of each sender unit identification number and signal strength signal intensity for ask correlation after relevant according to time-domain signal;
Fig. 8 judges the flow chart of each sender unit identification number and signal strength signal intensity for ask correlation after relevant according to frequency-region signal; And
Fig. 9 is the apparatus structure schematic diagram according to sender unit identification Sequence Detection flow process of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
In order better to explain the present invention, at first the generative process to beacon infrastructure, sender unit identification sequence generative process and synchronizing sequence describes.
Fig. 1 is the beacon infrastructure figure in CMMB (China Mobile Multimedia Broadcasting, the China Mobile multimedia broadcasting) system.As seen from the figure, beacon comprises sender unit identification sequence and two long synchronizing sequences.The sender unit identification sequence is positioned at the original position of beacon, is the limited pseudo-random signal of frequency band, is used for identifying different transmitters; Two long synchronizing sequences follow closely after the sender unit identification sequence, also are the limited pseudo-random signal of frequency band.In the present embodiment, the sample rate of CMMB system is 10MHz, and system bandwidth is 8MHz, comprise beacon and 53 OFDM symbols in every frame, totally 25 milliseconds, comprise 250,000 sampled point comprises sender unit identification sequence and long synchronizing sequence at two identical 2048 in the beacon.
Distinguish the generative process of accompanying drawings sender unit identification sequence and synchronizing sequence below.
Fig. 2 shows the flow chart that generates the sender unit identification sequence.As shown in FIG., the flow process of generation sender unit identification sequence comprises five steps of conversion that generate pseudo random sequence, generation frequency domain orthogonal sequence, sequence brachymemma, sequence location and frequency domain to time domain.In the present embodiment, the frequency domain truncated sequence after adopting the m sequence by the orthogonal sequence scrambler, this sequence produces time domain band limit random sequence through Fourier transform, and then obtains the sender unit identification sequence.Above process specifies as follows:
Generating pseudorandom m sequence, is x by generator polynomial promptly
8+ x
7+ x
6The shift register of+x+1 generates the m sequence, and wherein, the shift register initial condition is 00000001.
Then, the m sequence is mapped as multiple m sequence M (k).
Frequency domain orthogonal sequence maker generation length is 256 walsh sequences of 256, and the walsh sequence that obtains also converts the complex frequency domain sequence to
W(k)，k＝0，1，...，255。
After multiplying each other, multiple m sequence and walsh sequence W (k) corresponding element obtain length and be 256 complex symbol sequence.
The sequence puncturer is taken out the element of the some of this complex symbol sequence according to system's needs, obtains the multiple random sequence of frequency domain.In the present embodiment, the sequence puncturer is taken out the 66th to the 256th element of complex symbol sequence, obtains length and be 191 the multiple random sequence of frequency domain
S(k)，k＝0，1，...，190。
The sequence locator is 8M and the requirement of not having DC component according to signal bandwidth, and the multiple random sequence of 191 frequency domains is positioned at the appropriate location of frequency domain before the time-frequency domain conversation, obtains 256 frequency domain random sequence P (k), k=0, and 1 ..., 255, promptly
Adopt IFFT with 256 frequency domain random sequence P (k) by frequency domain transform to time domain, obtain the time domain random sequence
p(n)，n＝0，1，...，255，
Be sender unit identification sequence: p (n)=IFFT[P (k)], n=0,1 ..., 255
Two long synchronizing sequences that follow closely after the sender unit identification sequence also are the limited pseudo-random signal of frequency band.The product process of this synchronizing sequence comprises the multiple m sequence of generation, will answer the correspondence position that the m sequence is positioned at frequency domain as shown in Figure 3, obtains the frequency domain complex sequences and above-mentioned frequency domain complex sequences is carried out frequency-spatial transform, obtains band territory synchronizing sequence in limited time.Concrete generative process is as follows:
In multiple m sequence generator, be x by generator polynomial
10+ x
9+ 1 shift register generates the m sequence, and the initial condition of this shift register is 01110101101.
Then, the m sequence is mapped as multiple m sequence L (k).
Afterwards,, the m sequence is positioned at the appropriate location of frequency domain, obtains the frequency domain complex sequences by m sequence locator
X(k)，k＝0，1，...，2047，
Promptly
At last, use the IFFT converter with X (k) by frequency domain transform to time domain, obtain the band territory synchronizing sequence x (n) that prescribes a time limit, n=0,1 ..., 2047, promptly
x(n)＝IFFT[X(k)]，n＝0，1，...，2047。
Based on the generation of above-mentioned sender unit identification sequence and synchronizing sequence, the invention provides a kind of detection method of sender unit identification sequence.Fig. 4 shows the testing process figure of sender unit identification sequence.As seen from the figure, the detection method of sender unit identification sequence of the present invention may further comprise the steps:
S401:, detect effective multipath at receiver place according to the synchronous received signal of having obtained.
Utilize the received signal synchronized algorithm, can obtain synchronous received signal.According to the synchronous received signal of having obtained, the flow process of the effective multipath of step 401 detection as shown in Figure 5.The concrete steps that detect effective multipath comprise:
From obtain synchronous received signal, choose the long synchronizing sequence of certain-length, in the present embodiment, extract any long synchronizing sequence s (n) of 2048, n=0,1 ..., 2047.
2048 long synchronizing sequence s (n) of said extracted are 2048 FFT, time domain received signal s (n) are transformed to frequency-region signal S (k):
S(k)＝FFT{s(n)}，k＝0，1，…，2047。
Generate local scrambler sequence.In the present embodiment, the product process of the synchronizing sequence among the product process of local scrambler sequence and Fig. 3 is identical, according to the generation method of above-mentioned synchronizing sequence, generates frequency domain pseudorandom BPSK sequence X (k).
Frequency-region signal S (k) is separated randomization with local scrambler sequence X (k) conjugate multiplication, promptly obtains the frequency domain synthesis channel of receiver position to each transmitter:
H(k)，k＝0，1，...，2047。
H(k)＝S(k)X
H(k)，n＝0，1，…，2047
Frequency domain synthesis channel H (k) is 2048 IFFT, and the calculating channel impulse response obtains time domain synthesis channel h (n), n=0 ..., 2047, that is:
h(n)＝IFFT{H(k)}，n＝0，1，…，2047，
The maximum of the power of calculating channel impulse response,
peak＝max{|h(n)|
2}，n＝0，1，......2047，
Set the threshold value ratio (15dB) between peak power and each point power.If
peak/|h(n)|
2≥ratio，n＝0，1，......2047，
Judge that then this directly is effective diameter.
After obtaining effective diameter, at each effective diameter, seek the head of corresponding sender unit identification sequence,, seek and obtain the receiver/transmitter identifier of this footpath correspondence forward by the time domain brachymemma by the position of beacon infrastructure known transmitter identifier and synchronizing sequence.
S402:, intercept the sender unit identification sequence of each transmitter at each effective diameter.
Fig. 6 shows the flow chart of each sender unit identification sequence of intercepting in the step 402.Concrete steps comprise:
According to beacon infrastructure and effective diameter position, pushing away corresponding counting forward is exactly the position of possible each transmitter transmit identification signal.From these position intercept signal 256 points, be the transmit identification signal of possible transmitter by the time domain intercepting, be designated as r (n), n=0,1 ..., 255.
After the sender unit identification sequence of each transmitter of intercepting,, carry out the identification number and the signal strength signal intensity of each transmitter and judge at the receiver sender unit identification sequence of each possible effective diameter correspondence.
S403:, judge the identification number and the signal strength signal intensity of each transmitter at the sender unit identification sequence of each effective diameter correspondence.
Judge in the step 403 that the identification number of each transmitter and the method for signal strength signal intensity comprise two kinds, wherein first method is the time domain transmitter identifier that receives by calculating and the correlation of time domain local transmitter identifier, judge the identification number and the signal strength signal intensity of each transmitter, specifically comprise: generate the local transmitter identifier; The time domain transmitter identifier correspondence that receives is asked relevant with the time domain local transmitter identifier conjugate multiplication in the hunting zone, obtain correlation; Correlation the maximum is the sender unit identification number of this effective diameter correspondence; According to the sender unit identification of each effective diameter correspondence number, the channel power of the same transmit that adds up respectively machine, obtain the signal strength signal intensity of each transmitter.
Fig. 7 shows and above-mentionedly asks correlation after relevant by calculating time-domain signal, judges the flow chart of sender unit identification number and signal strength signal intensity.Specifically, to each possible sender unit identification sequence r (n), repeat to do following steps:
In the actual detected process, near the number Q of its transmitter and corresponding sender unit identification sequence can obtain in advance during receiver test, in this hunting zone, generate required time domain transmitter identifier according to sender unit identification sequence product process shown in Figure 2.
In Q transmitter hunting zone, the time domain transmitter identifier r (n) that receives is asked relevant with local possible time domain transmitter identifier p (n), obtain correlation c (q), q=0,1 ..., Q.
Utilize good auto-correlation of sender unit identification sequence and their cross correlation, seek the maximum among the c (q), its corresponding sender unit identification sequence number is the sender unit identification number of this effective diameter correspondence.
According to the sender unit identification of each effective diameter correspondence number, the channel power of the same transmit that adds up machine, calculate the signal strength signal intensity of each transmitter.
Judge the identification number of each transmitter and the method for signal strength signal intensity in the step 403, another kind method is the correlation by calculating frequency domain sender unit identification sequence and frequency domain local transmitter identifier signal, judge the identification number and the signal strength signal intensity of each transmitter, comprising: generate frequency domain local transmitter identifier; The time domain transmitter identifier that receives is transformed to frequency domain sender unit identification sequence; Frequency domain sender unit identification sequence correspondence is asked relevant with the frequency domain local transmitter identifier in the hunting zone, obtain correlation; Correlation the maximum is the sender unit identification number of this effective diameter correspondence; According to the sender unit identification of each effective diameter correspondence number, the channel power of the same transmit that adds up respectively machine, obtain the signal strength signal intensity of each transmitter.
Fig. 8 shows and above-mentionedly asks correlation after relevant by calculating frequency-region signal, judges the flow chart of sender unit identification number and signal strength signal intensity.Specifically, to each possible sender unit identification sequence r (n), repeat to do following steps:
In the actual detected process, near the number Q of its transmitter and corresponding sender unit identification sequence can obtain in advance during receiver test, in this hunting zone, generate required frequency domain sender unit identification sequence according to sender unit identification sequence product process shown in Figure 2.
The time domain transmitter identifier r (n) that receives is 256 FFT is transformed to frequency domain transmit identification sequence R (k), k=0,1 ..., 255.
In Q transmitter hunting zone, the frequency domain sender unit identification sequence R (k) that receives is asked relevant with local possible frequency domain sender unit identification sequence P (k), obtain correlation C (q), q=0,1 ..., Q.
Utilize good auto-correlation of sender unit identification sequence and their cross correlation, seek the maximum among the C (q), its corresponding sender unit identification sequence number is the sender unit identification sequence number of this effective diameter correspondence.
According to the sender unit identification of each effective diameter correspondence number, the channel power of the same transmit that adds up machine, calculate the signal strength signal intensity of each transmitter.
The present invention also provides a kind of sender unit identification sequence detecting apparatus 900, as shown in Figure 9, this device comprises: the effective multipath detection module 901 that is used to detect effective multipath of receiver present position, link to each other with the module 901 that detects effective multipath, be used to intercept each effective diameter correspondence reception transmit identification signal transmit identification signal interception module 902 with link to each other with the transmit identification signal interception module of each transmitter, be used to differentiate the sender unit identification number of each effective diameter correspondence, the number of place, statistics receiver position transmitter, identification number, and the sender unit identification number and the signal strength signal intensity judge module 903 of each transmitter signal strength of accumulative total.
Wherein, effectively multipath detection module 901 further comprises:
Dector is used for choosing long synchronizing sequence from obtaining synchronous received signal;
The time and frequency zone converter is used for the long synchronizing sequence that above-mentioned dector extracts is transformed to frequency-region signal by time-domain signal;
Local scrambler sequence maker is used to generate local scrambler sequence;
The frequency domain synthesis channel acquirer is used for and will separates randomization from the output signal conjugate multiplication of time and frequency zone converter and local scrambler sequence maker, obtains the frequency domain synthesis channel of receiver position to each transmitter;
The time domain synthesis channel acquirer, being used for the frequency domain synthesis channel conversion is the time domain synthesis channel; And
Effectively the multipath detector extracts the effective diameter at place, receiver position according to the time domain synthesis channel.
At each effective diameter, sender unit identification sequence interception module 902 further comprises:
The time domain interceptor is used to intercept the sender unit identification sequence.
At each effective diameter, sender unit identification number and signal strength signal intensity judge module 903 further comprise:
Local transmitter identifier maker is used to produce the local transmitter identifier;
Correlator is used for sender unit identification sequence and local sender unit identification sequence conjugate multiplication are asked correlation;
The time and frequency zone converter is used for the signal from the time domain interceptor is transformed to frequency-region signal by time-domain signal, obtains frequency domain sender unit identification sequence.
The sender unit identification determining device is used to detect the sender unit identification number of described effective diameter correspondence; And
The power adder is used for according to the sender unit identification of each effective diameter correspondence of sender unit identification determining device output number, the channel power of the same transmit that adds up machine, and calculate the signal strength signal intensity of each transmitter.
One of ordinary skill in the art will appreciate that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than disclosed only be the preferred embodiments of the present invention, can not limit the scope of the present invention with this certainly.Be appreciated that the equivalent variations of doing according to the present invention's essence defined in the appended claims and scope, still belong to the scope that the present invention is contained.
Claims (11)
1. a sender unit identification sequence detecting method is characterized in that, comprises the steps:
According to the synchronous received signal of having obtained, detect effective multipath at receiver place;
At each effective diameter, intercept the sender unit identification sequence of each transmitter; And
At the sender unit identification sequence of each effective diameter correspondence, judge the identification number and the signal strength signal intensity of each transmitter.
2. sender unit identification sequence detecting method as claimed in claim 1 is characterized in that, the step of effective multipath at described detection receiver place further comprises:
Extract one 2048 long synchronizing sequence, it is transformed to frequency-region signal;
Generate local scrambler sequence;
Frequency-region signal and local scrambler sequence multiplied each other separate randomization, obtain the frequency domain synthesis channel of receiver position to each transmitter;
The maximum of calculating channel impulse response and channel impulse response power is compared the power threshold that presets with channel power, obtain the effective diameter of receiver position.
3. sender unit identification sequence detecting method as claimed in claim 1 is characterized in that, the step of the sender unit identification sequence of described each transmitter of intercepting further comprises:
According to beacon infrastructure and effective diameter position, intercepting time domain transmitter identifier.
4. sender unit identification sequence detecting method as claimed in claim 3 is characterized in that,
At each effective diameter, seek the head of corresponding sender unit identification sequence, obtain the position of sender unit identification sequence and synchronizing sequence by beacon infrastructure, seek and obtain the receiver/transmitter identifier of this footpath correspondence forward by the time domain brachymemma.
5. sender unit identification sequence detecting method as claimed in claim 1, it is characterized in that the identification number of described each transmitter of judgement and the method for signal strength signal intensity comprise: the correlation of the local transmitter identifier in transmitter computes identifier correspondence and the hunting zone.
6. sender unit identification sequence detecting method as claimed in claim 5 is characterized in that, the time domain transmitter identifier that receives is asked relevant with time domain local transmitter identifier signal, judges the identification number and the signal strength signal intensity of each transmitter, comprising:
Generate time domain local transmitter identifier;
The time domain transmitter identifier correspondence that receives is asked relevant with the time domain local transmitter identifier in the hunting zone, obtain correlation;
Correlation the maximum is the sender unit identification number of this effective diameter correspondence;
According to the sender unit identification of each effective diameter correspondence number, the channel power of the same transmit that adds up respectively machine, obtain the signal strength signal intensity of each transmitter.
7. sender unit identification sequence detecting method as claimed in claim 5 is characterized in that, frequency domain sender unit identification sequence is asked relevant with frequency domain local transmitter identifier signal, judges the identification number and the signal strength signal intensity of each transmitter, comprising:
Generate frequency domain local transmitter identifier;
The time domain transmitter identifier that receives is transformed to frequency domain sender unit identification sequence;
Frequency domain sender unit identification sequence correspondence is asked relevant with the frequency domain local transmitter identifier in the hunting zone, obtain correlation;
Correlation the maximum is the sender unit identification number of this effective diameter correspondence;
According to the sender unit identification of each effective diameter correspondence number, the channel power of the same transmit that adds up respectively machine, obtain the signal strength signal intensity of each transmitter.
8. a sender unit identification sequence detecting apparatus is characterized in that, this device comprises:
Effective multipath detection module is used to detect effective multipath of receiver position;
Sender unit identification sequence interception module links to each other with the module of the effective multipath of described detection, is used to intercept the reception transmit identification signal of each effective diameter correspondence; And
Sender unit identification number and signal strength signal intensity judge module, link to each other with the transmit identification signal interception module of described each transmitter, be used to differentiate the sender unit identification number of each effective diameter correspondence, number, the identification number of place, statistics receiver position transmitter, and each transmitter signal strength of accumulative total.
9. sender unit identification sequence detecting apparatus as claimed in claim 8 is characterized in that, described effective multipath detection module comprises:
Dector, described dector are used for choosing long synchronizing sequence from obtaining synchronous received signal;
The time and frequency zone converter is used for the long synchronizing sequence that described dector extracts is transformed to frequency-region signal by time-domain signal;
Local scrambler sequence maker is used to generate local scrambler sequence;
The frequency domain synthesis channel acquirer is used for and will separates randomization from the output signal conjugate multiplication of time and frequency zone converter and local scrambler sequence maker, obtains the frequency domain synthesis channel of receiver position to each transmitter;
The time domain synthesis channel acquirer, being used for the frequency domain synthesis channel conversion is the time domain synthesis channel; And
Effectively the multipath detector extracts the effective diameter at place, receiver position according to described time domain synthesis channel.
10. sender unit identification sequence detecting apparatus as claimed in claim 8 is characterized in that, described transmit identification signal interception module comprises:
The time domain interceptor is used to intercept transmitter transmit identification signal.
11. sender unit identification sequence detecting apparatus as claimed in claim 8 is characterized in that, at each effective diameter, described sender unit identification number and signal strength signal intensity judge module comprise:
Local transmitter identifier maker is used to produce the local transmitter identifier;
Correlator is used for sender unit identification sequence and local sender unit identification sequence conjugate multiplication are asked correlation;
The time and frequency zone converter is used for the signal from the time domain interceptor is transformed to frequency-region signal by time-domain signal, obtains frequency domain sender unit identification sequence;
The sender unit identification determining device is used to detect the sender unit identification number of described effective diameter correspondence; And
The power adder is used for according to the sender unit identification of each effective diameter correspondence of sender unit identification determining device output number, and the channel power of the same transmit that adds up machine calculates the signal strength signal intensity of each transmitter.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102414212A CN102082753A (en) | 2009-12-01 | 2009-12-01 | Detection method and device of transmitter identification sequence |
| PCT/CN2010/079041 WO2011066774A1 (en) | 2009-12-01 | 2010-11-24 | Method and apparatus for detecting transmitter identification sequence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102414212A CN102082753A (en) | 2009-12-01 | 2009-12-01 | Detection method and device of transmitter identification sequence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102082753A true CN102082753A (en) | 2011-06-01 |
Family
ID=44088507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102414212A Pending CN102082753A (en) | 2009-12-01 | 2009-12-01 | Detection method and device of transmitter identification sequence |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102082753A (en) |
| WO (1) | WO2011066774A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787753A (en) * | 2020-12-24 | 2021-05-11 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | E1 channel in-band communication method, sending equipment and receiving equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6134267A (en) * | 1997-09-09 | 2000-10-17 | Sony International (Europe) Gmbh | Detection method for the transmitter identification information signal in the null symbol of a DAB stream |
| CN1588834A (en) * | 2004-09-16 | 2005-03-02 | 北京天碁科技有限公司 | Frequency deviation evaluation device and method |
| CN1960356A (en) * | 2006-10-20 | 2007-05-09 | 北京泰美世纪科技有限公司 | System and method for generating and detecting identification sequence of band limited transmitter |
| CN101166169A (en) * | 2006-10-20 | 2008-04-23 | 北京泰美世纪科技有限公司 | System and method for making frame synchronization tracking and channel detection based on frequency domain sequence |
-
2009
- 2009-12-01 CN CN2009102414212A patent/CN102082753A/en active Pending
-
2010
- 2010-11-24 WO PCT/CN2010/079041 patent/WO2011066774A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6134267A (en) * | 1997-09-09 | 2000-10-17 | Sony International (Europe) Gmbh | Detection method for the transmitter identification information signal in the null symbol of a DAB stream |
| CN1588834A (en) * | 2004-09-16 | 2005-03-02 | 北京天碁科技有限公司 | Frequency deviation evaluation device and method |
| CN1960356A (en) * | 2006-10-20 | 2007-05-09 | 北京泰美世纪科技有限公司 | System and method for generating and detecting identification sequence of band limited transmitter |
| CN101166169A (en) * | 2006-10-20 | 2008-04-23 | 北京泰美世纪科技有限公司 | System and method for making frame synchronization tracking and channel detection based on frequency domain sequence |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787753A (en) * | 2020-12-24 | 2021-05-11 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | E1 channel in-band communication method, sending equipment and receiving equipment |
| CN112787753B (en) * | 2020-12-24 | 2023-03-24 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | E1 channel in-band communication method, sending equipment and receiving equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011066774A1 (en) | 2011-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10911276B2 (en) | Transmitter, receiver and methods and computer readable medium | |
| TWI441490B (en) | Digital video broadcast service discovery | |
| TWI467974B (en) | Methods, apparatuses and computer readable medium for orthogonal frequency division multiplexing synchronization | |
| JP4440831B2 (en) | Base station apparatus, transmission method, and communication system | |
| JP5788565B2 (en) | Base station and user equipment | |
| CN105103484A (en) | Transmitter and method of transmitting payload data, receiver and method of receiving payload data in OFDM system | |
| KR20060026171A (en) | Apparatus and method for cell search in mobile communication system using multiple access scheme | |
| CN105991498A (en) | Preamble symbol generating and receiving methods | |
| KR20130075930A (en) | Method and apparatus for transmitting/receiving pilot sequence in a broadcasting communication system | |
| KR20150006319A (en) | data structure generating method and apparatus using the method | |
| KR102113785B1 (en) | Transmitter, receiver and controlling method thereof | |
| CN108347399B (en) | Method and device for generating and receiving preamble signal | |
| CN102891814A (en) | Method for implementing channel multi-path detection based on P1 sign | |
| CN102082753A (en) | Detection method and device of transmitter identification sequence | |
| CN100493063C (en) | System and method for generating and detecting identification sequence of band limited transmitter | |
| CN101098151A (en) | Method for receiving broadcasting signal | |
| RU2010131800A (en) | DEVICE AND METHOD FOR TRANSMISSION AND RECEIVING OF PREAMBLE IN VIDEO DIGITAL BROADCAST TRANSMISSION SYSTEM | |
| JP2007074518A (en) | Multicarrier transmitter, multicarrier receiver and synchronization detection method | |
| CN101119351A (en) | OFDM signal receiving and dispatching method and apparatus | |
| CN101552759B (en) | Transmission mode detection device | |
| CN1909548B (en) | Multicarrier system with 3780-point IDFT/DFT processor and method therefor | |
| EP2092707A1 (en) | Apparatus and method of detecting timing synchronization for fast fourier transform | |
| CN100563229C (en) | Orthogonal frequency diversity receiver and method of reseptance thereof | |
| Agarwal et al. | Receiver synchronization for Digital Audio Broadcasting system based on Phase reference symbol | |
| EP1715604A1 (en) | Apparatus and method for detecting transmission mode for digital broadcasting receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1156754 Country of ref document: HK |
|
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20110601 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1156754 Country of ref document: HK |