CN105356906B - A kind of BOC modulated signal production methods that can flexibly control - Google Patents
A kind of BOC modulated signal production methods that can flexibly control Download PDFInfo
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- CN105356906B CN105356906B CN201510820159.2A CN201510820159A CN105356906B CN 105356906 B CN105356906 B CN 105356906B CN 201510820159 A CN201510820159 A CN 201510820159A CN 105356906 B CN105356906 B CN 105356906B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
A kind of BOC modulated signal production methods that can flexibly control, this method is on the basis of BOC modulated signals, define control parameter, and produce monocyclic sequence of subcarriers using control parameter, further pass through the periodic extension of monocycle subcarrier, flexibly controllable subcarrier is generated, and then mould two and computing are carried out using spread-spectrum pseudo code and subcarrier, so as to produce FC BOC modulated signals.Flexibly controllable BOC signals can be achieved in the present invention, have dynamic and the flexibility of frequency spectrum and correlation function.
Description
Technical field
The invention belongs to communication technical field, is related to a kind of BOC modulated signal production methods that can flexibly control, and is specially
The deformation method of BOC modulated signals under DSSS system, so as to improve the flexible configuration performance of BOC modulated signals.
Background technology
Direct Sequence Spread Spectrum Communication by its secrecy, anti-noise, it is anti-interference, it is high-precision measure etc. advantage, gradually into
For the important support in the fields such as mobile communication, satellite navigation.Preferably to improve the communication matter of DSSS application system
Amount, reduce homogenous frequency signal mutual interference, increase confidentiality and improve antijamming capability, BOC modulation techniques occur.BOC modulated signals
Unique distinction be presented as that baseband processing stage addition of subcarrier modulation, the frequency spectrum of its signal to centre frequency bilateral segmentation,
Because main peak slope is larger, positioning precision more more preferable than psk signal can be obtained, more peak characters also occurs in auto-correlation function.So
And the baseband subcarrier of current BOC modulated signals is square, and monocycle sequence of subcarriers value only has+1 and -1 liang
Kind, therefore, when spread-spectrum pseudo code frequency and subcarrier frequency are definite value, the frequency spectrum and auto-correlation function of BOC signals are also fixation
Form, it lacks expansible space.Accordingly, it is considered to flexibility and the scalability of signal application, have frequency spectrum and correlation function
Flexible controllable characteristics BOC signals apply by as the new direction of future development.
The content of the invention
The present invention is directed to the non-flexible property of existing BOC modulated signals, there is provided a kind of BOC modulated signals that can flexibly control
Production method, this method are on the basis of BOC modulated signals, define control parameter, and produce by configuring control parameter
Raw monocyclic sequence of subcarriers, further by the periodic extension of subcarrier, generates the subcarrier flexibly controlled and modulation
Signal, so as to realize the dynamic of signal spectrum and correlation function and flexibility.
For achieving the above object, the technical scheme of use is as follows：
Defining the BOC that can flexibly control is：FC-BOC（Flexible Control Binary Offset Carrier）,
Its signal representation is：FC-BOC(,,), wherein,It is subcarrier frequency parameter,It is spread-spectrum pseudo code frequency
Parameter,It is control parameter.First, control parameter is configured, and utilizeProduce the secondary load of a cycle
Wave train；And it is 1.023MHz to set reference clock frequency；Further, subcarrier frequency parameter is utilized, produce subcarrier
Frequency, utilize spread-spectrum pseudo code frequency parameter, produce spread-spectrum pseudo code frequency；And according to spread-spectrum pseudo code frequency, produce
Spread-spectrum pseudo code, according to subcarrier frequency, and to sequencePeriodic extension is carried out, so as to produce subcarrier；
Finally, spread-spectrum pseudo code is utilizedAnd subcarrierCarry out mould two and computing, obtain FC-BOC (,,) letter
Number.
Brief description of the drawings
Fig. 1 be FC-BOC (,,) produce schematic diagram.
Embodiment
A kind of BOC modulated signal production methods that can flexibly control, this method can realize that BOC modulated signals are flexibly controllable
Frequency spectrum and correlation function.This method defines and is configured with control parameter；According to the control parameter of configuration, and pass through specific steps
Come produce FC-BOC (,,) signal.
Described definition and configuration control parameter method are：
For produce FC-BOC (,,) signal, it should first produce flexibly controllable monocycle sequence of subcarriers。
Wherein, monocycle sequence of subcarriers is setInside have 0 ,+1, -1 three kind of value, the particular order of three kinds of values and duration
Can flexibly it control, for controlParticular sequence value and the duration, define control parameter, its symbol is。
Control parameterInIt is monocycle sequence of subcarriersThree kinds of value selection coefficients during generation,'s
Scope is, specifically chosen method is：
WhenWhen,Three kinds of values order during generation is+1,0, -1；
WhenWhen,Three kinds of values order during generation is -1,0 ,+1；
WhenWhen,Three kinds of values order during generation is 0 ,+1, -1；
WhenWhen,Three kinds of values order during generation is 0, -1 ,+1；
WhenWhen,Three kinds of values order during generation is+1, -1,0；
WhenWhen,Three kinds of values order during generation is -1 ,+1,0.
Control parameterInWith, it is monocycle sequence of subcarriersRatio during generation shared by three kinds of values
Example coefficient,,, and.Wherein：
It is in three kinds of values shared by first valueRatio；
It is in three kinds of values shared by second valueRatio；
It is in three kinds of values shared by the 3rd valueRatio.
Described FC-BOC (,,) signal produce step be：
Step 1：Configure control parameter, and utilizeProduce monocycle sequence of subcarriers。
Step 2：Setting reference clock frequency is 1.023MHz；Subcarrier frequency parameter is setAnd spread-spectrum pseudo code frequency ginseng
Number。
Step 3：Utilize subcarrier frequency parameter, producing subcarrier frequency isMHz；Utilize spread spectrum
Pseudo-code frequency parameter, producing spread-spectrum pseudo code frequency isMHz。
Step 4：According to spread-spectrum pseudo code frequency, produce spread-spectrum pseudo code；According to subcarrier frequency, and to sequence
RowPeriodic extension is carried out, so as to produce subcarrier。
Step 5：Utilize spread-spectrum pseudo codeAnd subcarrierCarry out mould two and computing, so as to obtain FC-BOC (,,) signal.
Claims (1)
1. a kind of BOC modulated signal production methods that can flexibly control, it is characterised in that this method includes：Definition and configuration control
Parameter,Signal produces step；
Described definition and configuration control parameter step are：
To produceSignal, it should first produce flexibly controllable monocycle sequence of subcarriers SN；Its
In, set monocycle sequence of subcarriers SNInside have 0 ,+1, -1 three kind of value, the particular order of three kinds of values and duration are can
Flexibly control, to control SNParticular sequence value and the duration, define control parameter；
Control parameterInIt is monocycle sequence of subcarriers SNThree kinds of value selection coefficients during generation,Scope beSpecifically chosen method is：
WhenWhen, SNThree kinds of values order during generation is+1,0, -1；
WhenWhen, SNThree kinds of values order during generation is -1,0 ,+1；
WhenWhen, SNThree kinds of values order during generation is 0 ,+1, -1；
WhenWhen, SNThree kinds of values order during generation is 0, -1 ,+1；
WhenWhen, SNThree kinds of values order during generation is+1, -1,0；
WhenWhen, SNThree kinds of values order during generation is -1 ,+1,0；
Control parameterIn β1And β2, it is monocycle sequence of subcarriers SNProportionality coefficient during generation shared by three kinds of values,
0≤β1≤ 1,0≤β2≤ 1, and 0≤β1+β2≤1；Wherein：
β1It is S shared by first value in three kinds of valuesNRatio；
β2It is S shared by second value in three kinds of valuesNRatio；
1-(β1+β2) it is the 3rd S shared by value in three kinds of valuesNRatio；
DescribedSignal produces step：
Step 1：Configure control parameterAnd utilizeProduce monocycle sequence of subcarriers SN；
Step 2：Setting reference clock frequency is 1.023MHz；Subcarrier frequency parameter p and spread-spectrum pseudo code frequency parameter q is set；
Step 3：Using subcarrier frequency parameter p, generation subcarrier frequency is fSC=p × 1.023MHz；Utilize spread-spectrum pseudo code frequency
Rate parameter q, it is f to produce spread-spectrum pseudo code frequencyC=q × 1.023MHz；
Step 4：According to spread-spectrum pseudo code frequency fC, produce spread-spectrum pseudo code C (n)；According to subcarrier frequency fSC, and to sequence SNCarry out
Periodic extension, so as to produce subcarrier SC(n)；
Step 5：Utilize spread-spectrum pseudo code C (n) and subcarrier SC(n) mould two and computing are carried out, so as to obtainSignal.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520426A (en) * | 2012-01-05 | 2012-06-27 | 上海海事大学 | General binary migration carrier modulation method of satellite navigation system signal |
| WO2015105543A2 (en) * | 2014-01-10 | 2015-07-16 | Deere & Company | Method and receiver for receiving a composite signal |
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- 2015-11-24 CN CN201510820159.2A patent/CN105356906B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520426A (en) * | 2012-01-05 | 2012-06-27 | 上海海事大学 | General binary migration carrier modulation method of satellite navigation system signal |
| WO2015105543A2 (en) * | 2014-01-10 | 2015-07-16 | Deere & Company | Method and receiver for receiving a composite signal |
Non-Patent Citations (1)
| Title |
|---|
| BOC调制信号发生器原型***的设计与实现;钟鸣，冯永新，周丹;《沈阳理工大学学报》;20081031;第27卷(第5期);全文 * |
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