CN106792566B - A kind of broadcast singal generation method and device - Google Patents
A kind of broadcast singal generation method and device Download PDFInfo
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- CN106792566B CN106792566B CN201610876879.5A CN201610876879A CN106792566B CN 106792566 B CN106792566 B CN 106792566B CN 201610876879 A CN201610876879 A CN 201610876879A CN 106792566 B CN106792566 B CN 106792566B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
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- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The present invention provides a kind of broadcast singal generation method and device, which comprises the length of the broadcast singal based on broadband system generates the first broadcast singal；Cyclic shift is carried out to first broadcast singal to obtain the second broadcast singal, the initial position after the second broadcast singal frequency domain mapping is located at the frequency initial position that narrowband systems are used for transmission broadcast singal.Method and device in the embodiment of the present invention allows the terminal of different bandwidth system to decode same broadcast singal.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of broadcast singal generation method and devices.
Background technique
Network side usually notifies the basic access information of user terminal by broadcast singal, in existing system, Ke Yiwei
Terminal suitable for broadband system and the terminal suitable for narrowband systems provide service.
But the broadcast singal of existing broadband system and narrowband systems is usually to design alone respectively, and be applicable in
The broadcast singal of broadband system can not be decoded in the terminal of narrowband systems, the terminal suitable for broadband system can not also decode narrowband
The broadcast singal of system.
Summary of the invention
Present invention solves the technical problem that being that can not decode same broadcast singal suitable for the terminal of different bandwidth system.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of broadcast singal generation method, comprising: be based on broadband
The length of the broadcast singal of system generates the first broadcast singal；Cyclic shift is carried out to obtain the to first broadcast singal
Two broadcast singals, the initial position after the second broadcast singal frequency domain mapping are located at narrowband systems and are used for transmission broadcast singal
Frequency initial position.
Optionally, first broadcast singal is the signal generated in an iterative manner.
Optionally, the length of the broadcast singal based on broadband system, it includes: raw based on m-sequence for generating the first broadcast singal
At rule and the length of the broadcast singal of the broadband system, first broadcast singal is generated.
Optionally, the length of the broadcast singal based on broadband system, it includes: raw based on ZC sequence for generating the first broadcast singal
At rule and the length of the broadcast singal of the broadband system, first broadcast singal is generated.
Optionally, described includes: by the first broadcast singal cyclic shift N to first broadcast singal progress cyclic shift
Position, so that first element of the first broadcast singal is located at the first element position of narrowband systems broadcast singal, N is natural number
And it is less than (N_w-N_n), wherein N_w is the length of the broadcast singal of broadband system, and N_n is the length of the broadcast singal of narrowband systems
Degree.
The embodiment of the present invention also provides a kind of broadcast singal generating means, comprising: the first broadcast singal generation unit is suitable for
The length of broadcast singal based on broadband system generates the first broadcast singal；Cycle shift unit is suitable for first broadcast
Signal carries out cyclic shift to obtain the second broadcast singal, and the initial position after the second broadcast singal frequency domain mapping is located at narrow
The frequency initial position of broadcast singal is used for transmission with system bandwidth.
Optionally, the first broadcast singal generation unit is suitable for generating first broadcast singal in an iterative manner.
Optionally, the first broadcast singal generation unit is suitable for being based on m-sequence create-rule and the broadband system
Broadcast singal length, generate first broadcast singal.
Optionally, the first broadcast singal generation unit is suitable for being based on ZC sequence create-rule and the broadband system
Broadcast singal length, generate first broadcast singal.
Optionally, the cycle shift unit is suitable for by the first broadcast singal cyclic shift N, so that the first broadcast singal
First element be located at the first element position of narrowband systems broadcast singal, N be natural number and be less than (N_w-N_n),
Middle N_w is the length of the broadcast singal of broadband system, and N_n is the length of the broadcast singal of narrowband systems.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that
In embodiments of the present invention, the length of the broadcast singal based on broadband system generates the first broadcast singal；To described
The start bit that first broadcast singal carries out cyclic shift to obtain the second broadcast singal, after the second broadcast singal frequency domain mapping
The frequency initial position of broadcast singal is used for transmission setting in narrowband systems bandwidth.Due to the broadcast singal based on broadband system
Length generates the first broadcast singal, and the first broadcast singal carries out cyclic shift and obtains the second broadcast singal, and the first broadcast singal
Autocorrelation with higher, therefore the terminal for being suitable for broadband system can decode whole signals of the second broadcast singal；Due to
Initial position after the mapping of second broadcast singal frequency domain is located at the frequency start bit that narrowband systems bandwidth is used for transmission broadcast singal
It sets, therefore the part signal second broadcast singal can be decoded suitable for the terminal of narrowband systems.It is different types of as a result,
Terminal can decode same broadcast singal, can be with lifting system efficiency.
Further, first broadcast singal can be the signal generated in an iterative manner, the sequence of the first broadcast singal
Column are smaller with the degree of correlation of length, and have good autocorrelation performance, therefore believe the first broadcast iteratively generated
Number carry out cyclic shift obtain the second broadcast singal and frequency domain mapping after, the terminal suitable for different bandwidth type is easier to therefrom
Decoding, to obtain the whole or signal of the second broadcast singal.
Detailed description of the invention
Fig. 1 is a kind of flow chart of broadcast singal generation method in the embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of first broadcast singal and the second broadcast singal in the embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of broadcast singal generating means in the embodiment of the present invention.
Specific embodiment
As previously mentioned, what the broadcast singal of existing broadband system and narrowband systems usually designed alone respectively, and
The broadcast singal that broadband system can not be decoded suitable for the terminal of narrowband systems, the terminal suitable for broadband system can not also decode
The broadcast singal of narrowband systems, and the broadcast singal of the broadcast singal of broadband system and narrowband systems occupies system bandwidth not
Same frequency range.
For example, the broadcast singal of the broadband system in existing system, such as the broadcast singal of LTE system, frequency domain
6 Physical Resource Block (physical resource block, PRB), the i.e. bandwidth of 1.08MHz are occupied, wherein primary synchronization signal
(Primary Synchronization Signal, PSS) and secondary synchronization signal (Secondary Synchronization
Signal, SSS) respectively occupy 1 symbol；And in narrowband systems such as narrowband Internet of Things (Narrow Band Internet of
Things, NB-IoT) in, frequency domain only takes up the 1 PRB i.e. bandwidth of 180KHz, and time domain occupies multiple symbols.And broadband system
The broadcast singal of system and the broadcast singal of narrowband systems occupy the different frequency range of system bandwidth.
In embodiments of the present invention, the length of the broadcast singal based on broadband system generates the first broadcast singal；To described
The start bit that first broadcast singal carries out cyclic shift to obtain the second broadcast singal, after the second broadcast singal frequency domain mapping
The frequency initial position of broadcast singal is used for transmission setting in narrowband systems bandwidth.Due to the broadcast singal based on broadband system
Length generates the first broadcast singal, and the first broadcast singal carries out cyclic shift and obtains the second broadcast singal, and the first broadcast singal
Autocorrelation with higher, therefore the terminal for being suitable for broadband system can decode whole signals of the second broadcast singal；Due to
Initial position after the mapping of second broadcast singal frequency domain is located at the frequency start bit that narrowband systems bandwidth is used for transmission broadcast singal
It sets, therefore the part signal second broadcast singal can be decoded suitable for the terminal of narrowband systems.It is different types of as a result,
Terminal can decode same broadcast singal, can be with lifting system efficiency.
Further, first broadcast singal is the signal generated in an iterative manner, the sequence of the first broadcast singal with
The degree of correlation of length is smaller, and have good autocorrelation performance, therefore to the first broadcast singal iteratively generated into
After row cyclic shift obtains the second broadcast singal and frequency domain mapping, the terminal suitable for different bandwidth type is easier to therefrom translate
Code, to obtain the whole or signal of the second broadcast singal.
In addition, since the broadcast singal of narrowband systems is that the broadcast singal progress cyclic shift based on broadband system obtains
, inside the system bandwidth that the broadcast singal that the broadcast singal of narrowband systems can be located at broadband system occupies, without occupying more
More system bandwidths, and narrowband terminal is not necessarily to know the length of wide-band terminal broadcast singal.Therefore the broadcast in the embodiment of the present invention
Signal creating method can save system bandwidth.Broadcast singal generation method in the embodiment of the present invention can be applied to 5G system
System.
It is understandable to enable above-mentioned purpose of the invention, feature and beneficial effect to become apparent, with reference to the accompanying drawing to this
The specific embodiment of invention is described in detail.
Fig. 1 is a kind of flow chart of broadcast singal generation method in the embodiment of the present invention, can specifically include following steps:
Step S11, the length of the broadcast singal based on broadband system generate the first broadcast singal；
Step S12 carries out cyclic shift to first broadcast singal to obtain the second broadcast singal, second broadcast
Initial position after signal frequency domain mapping is located at the frequency initial position that narrowband systems bandwidth is used for transmission broadcast singal.
Wherein, the bandwidth range that broadband system uses is greater than the bandwidth range that narrowband systems use.
Broadcast singal can be the signal that system is issued by way of broadcast, for the access of terminal, such as can wrap
Include synchronization signal.
Within a preset range, therefore the terminal of broadband system can be to process for the correlation of the sequence of first broadcast singal itself
The second broadcast singal after frequency domain maps one by one is decoded.
In specific implementation, the first broadcast singal can be the signal generated in an iterative manner, raw by iterative manner
At signal and length correlation it is smaller.The longer signal the number of iterations of length can be more, the shorter signal iteration of length
Number can be less, but the iteration consensus sequence of the signal of different length can be identical, and the longer signal of length can be
Continue what iteration obtained in the sequence basis of the shorter signal of length.
Since the broadcast singal that is obtained by iterative manner has a good autocorrelation performance, therefore to iteratively generating
The first broadcast singal carry out cyclic shift obtain the second broadcast singal and frequency domain mapping after, the end suitable for different bandwidth type
End (such as broadband system terminal and narrowband systems terminal) be easier to therefrom decode, with obtain the second broadcast singal whole
Or part signal.
Generate in an iterative manner the first broadcast singal specific implementation can be it is diversified.Preferably, in this hair
In a bright embodiment, described the can be generated based on the length of the broadcast singal of m-sequence create-rule and the broadband system
One broadcast singal.M-sequence is the abbreviation of maximum length linear shift register sequence, it is by multi-stage shift register or other delays
The longest code sequence that element is generated by linear feedback has the advantages such as be also easy to produce, regularity is strong.
The first broadcast singal that the length of broadcast singal based on m-sequence create-rule and the broadband system generates with
The correlation of length is weaker, therefore the terminal suitable for the terminal of broadband system and suitable for narrowband systems can be after frequency domain mapping
Signal in obtain access required for broadcast singal.
In specific implementation, the first broadcast singal can also be generated using other way, such as ZC can be based on
The length of the broadcast singal of (Zadoff-Chu, ZC) sequence create-rule and the broadband system generates first broadcast
Signal.ZC sequence has extraordinary autocorrelation and very low cross correlation, and in existing LTE PRACH, transmitting terminal is selected
Be ZC sequence.
In order to enable the terminal suitable for narrowband systems to decode the part signal second broadcast singal, is needed
Initial position after the mapping of two broadcast singal frequency domains is located at the frequency initial position that narrowband systems bandwidth is used for transmission broadcast singal.
Wherein, the initial position after the mapping of the second broadcast singal frequency domain refers to the starting member of the first broadcast singal sequence
The position of element.
It in specific implementation, can be by the first broadcast singal cyclic shift N, so that first member of the first broadcast singal
Element is located at the first element position of narrowband systems broadcast singal, and N is natural number and is less than (N_w-N_n), and wherein N_w is broadband
The length of the broadcast singal of system, N_n are the length of the broadcast singal of narrowband systems.At this point, the second broadcast singal frequency domain
Initial position after mapping is located at the frequency initial position that narrowband systems are used for transmission broadcast singal.
In an embodiment of the present invention, described may include: by first to first broadcast singal progress cyclic shift
Broadcast singal cyclic shift (N_w-N_n)/2, wherein N_w is the length of the broadcast singal of broadband system, and N_n is narrowband systems
The length of broadcast singal.
The bandwidth that narrowband systems broadcast singal occupies at this time can be located at rising for the bandwidth that broadband system broadcast singal occupies
Beginning position, carries out frequency domain mapping to the second broadcast singal and can be frequency domain mapping one by one namely time-domain position and frequency domain position
Sequencing maps correspondingly.Frequency domain mapping and orthogonal frequency can be carried out after carrying out cyclic shift to the first broadcast singal
It is multiplexed (Orthogonal Frequency Division Multiplexing, OFDM) modulation.
Fig. 2 is a kind of schematic diagram of first broadcast singal and the second broadcast singal in the embodiment of the present invention.
It is assumed that broadband system broadcast singal sequence length is 62, narrowband systems broadcast singal sequence length is 24, narrowband system
The bandwidth that broadcast singal occupies of uniting can be located at the bandwidth (being illustrated in figure with B range) that broadband system broadcast singal occupies
Initial position, i.e. bandwidth in figure within the scope of A.
Since narrowband systems broadcast singal sequence length is 24, therefore by the first broadcast singal sequence x0……x61Cyclic shift
(62-24)/2=19 obtains broadcast singal sequence x44x45…x61x0x1…x42x43, the broadcast singal sequence of acquisition is subjected to frequency domain
It maps one by one.
At this point, the initial position after the mapping of the second broadcast singal frequency domain is x0The position at place, i.e. the first broadcast singal sequence
The position of the starting elemental of column.The position is located at the first element position of narrowband systems broadcast singal, is suitable for narrowband as a result,
The terminal of system can be to x0To x23It is decoded.
Left side sequence is the sequence of the first broadcast singal in Fig. 2, and the sequence on right side is the sequence of the second broadcast singal in Fig. 2
Column.As can be seen that being mapped one by one if directly carrying out frequency domain to the sequence of the first broadcast singal, the broadcast that narrowband systems receive
Signal sequence is x24To x43, can not be decoded.And if being mapped one by one the second broadcast singal progress frequency domain, narrowband systems
The broadcast singal sequence received is x0To x23, can the broadcast singal sequence to the part decode.
It is understood that narrowband systems can be located at broadband system for broadcasting letter for the frequency resource of broadcast singal
Number frequency resource in, specific location can be in its initial position, can also be in the other positions other than initial position.To first
The digit that broadcast singal carries out cyclic shift can be used for position and the frequency of the frequency resource of broadcast singal according to narrowband systems
The mode of domain mapping determines.
In embodiments of the present invention, the length of the broadcast singal based on broadband system generates the first broadcast singal；To described
The start bit that first broadcast singal carries out cyclic shift to obtain the second broadcast singal, after the second broadcast singal frequency domain mapping
The frequency initial position of broadcast singal is used for transmission setting in narrowband systems bandwidth.Due to the broadcast singal based on broadband system
Length generates the first broadcast singal, and the first broadcast singal carries out cyclic shift and obtains the second broadcast singal, and the first broadcast singal
Autocorrelation with higher, therefore the terminal for being suitable for broadband system can decode whole signals of the second broadcast singal；Due to
Initial position after the mapping of second broadcast singal frequency domain is located at the frequency start bit that narrowband systems bandwidth is used for transmission broadcast singal
It sets, therefore the part signal second broadcast singal can be decoded suitable for the terminal of narrowband systems.It is different types of as a result,
Terminal can decode same broadcast singal, can be with lifting system efficiency.
The embodiment of the present invention also provides a kind of broadcast singal generating means, and structural schematic diagram specifically can wrap referring to Fig. 3
It includes:
First broadcast singal generation unit 31 generates the first broadcast suitable for the length of the broadcast singal based on broadband system
Signal；
Cycle shift unit 32, suitable for first broadcast singal carry out cyclic shift to obtain the second broadcast singal,
Initial position after the second broadcast singal frequency domain mapping is located at the frequency that narrowband systems bandwidth is used for transmission broadcast singal
Beginning position.
Wherein, the first broadcast singal generation unit 31 is suitable for generating first broadcast singal in an iterative manner.
Specifically, the first broadcast singal generation unit 31 can be based on m-sequence create-rule and the broadband system
The length of broadcast singal generates first broadcast singal.
The first broadcast singal generation unit 31 can also be based on ZC sequence create-rule and the broadband system
The length of broadcast singal generates first broadcast singal.
In specific implementation, the cycle shift unit 32 can by the first broadcast singal cyclic shift (N_w-N_n)/2,
Wherein N_w is the length of the broadcast singal of broadband system, and N_n is the length of the broadcast singal of narrowband systems.
It is raw to may refer to broadcast singal for the specific implementation of broadcast singal generating means and beneficial effect in the embodiment of the present invention
At method, details are not described herein.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (8)
1. a kind of broadcast singal generation method characterized by comprising
The length of broadcast singal based on broadband system generates the first broadcast singal；
Cyclic shift is carried out to first broadcast singal to obtain the second broadcast singal, the second broadcast singal frequency domain mapping
Initial position afterwards is located at the frequency initial position that narrowband systems are used for transmission broadcast singal；
It is described to include: to first broadcast singal progress cyclic shift
By the first broadcast singal cyclic shift (N_w-N_n)/2, wherein N_w is the length of the broadcast singal of broadband system, and N_n is
The length of the broadcast singal of narrowband systems, N_w and N_n are natural number.
2. broadcast singal generation method according to claim 1, which is characterized in that first broadcast singal is with iteration
The signal that generates of mode.
3. broadcast singal generation method according to claim 1, which is characterized in that the broadcast singal based on broadband system
Length generates the length that the first broadcast singal includes: the broadcast singal based on m-sequence create-rule and the broadband system,
Generate first broadcast singal.
4. broadcast singal generation method according to claim 1, which is characterized in that the broadcast singal based on broadband system
Length generates the length that the first broadcast singal includes: the broadcast singal based on ZC sequence create-rule and the broadband system,
Generate first broadcast singal.
5. a kind of broadcast singal generating means characterized by comprising
First broadcast singal generation unit generates the first broadcast singal suitable for the length of the broadcast singal based on broadband system；
Cycle shift unit, suitable for carrying out cyclic shift to first broadcast singal to obtain the second broadcast singal, described the
Initial position after the mapping of two broadcast singal frequency domains is located at the frequency initial position that narrowband systems bandwidth is used for transmission broadcast singal；
The cycle shift unit is suitable for the first broadcast singal cyclic shift (N_w-N_n)/2, and wherein N_w is broadband system
The length of broadcast singal, N_n are the length of the broadcast singal of narrowband systems, and N_w and N_n are natural number.
6. broadcast singal generating means according to claim 5, which is characterized in that the first broadcast singal generation unit
Suitable for generating first broadcast singal in an iterative manner.
7. broadcast singal generating means according to claim 5, which is characterized in that the first broadcast singal generation unit
Suitable for the length of the broadcast singal based on m-sequence create-rule and the broadband system, first broadcast singal is generated.
8. broadcast singal generating means according to claim 5, which is characterized in that the first broadcast singal generation unit
Suitable for the length of the broadcast singal based on ZC sequence create-rule and the broadband system, first broadcast singal is generated.
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| CN102843777A (en) * | 2011-06-20 | 2012-12-26 | 普天信息技术研究院有限公司 | Control method for random access signals |
| CN105356986A (en) * | 2015-12-07 | 2016-02-24 | 合肥东芯通信股份有限公司 | Reference signal generation method, base station, channel estimation method and terminal |
| CN105900400A (en) * | 2014-12-05 | 2016-08-24 | Lg电子株式会社 | Broadcast signal transmission method, broadcast signal transmission device, broadcast signal reception method, and broadcast signal reception device |
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| EP2999231A4 (en) * | 2013-05-15 | 2017-02-22 | LG Electronics Inc. | Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, method for transmitting broadcast signal and method for receiving broadcast signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102843777A (en) * | 2011-06-20 | 2012-12-26 | 普天信息技术研究院有限公司 | Control method for random access signals |
| CN105900400A (en) * | 2014-12-05 | 2016-08-24 | Lg电子株式会社 | Broadcast signal transmission method, broadcast signal transmission device, broadcast signal reception method, and broadcast signal reception device |
| CN105356986A (en) * | 2015-12-07 | 2016-02-24 | 合肥东芯通信股份有限公司 | Reference signal generation method, base station, channel estimation method and terminal |
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