CN107196677A - A kind of anti-interference emission system design method - Google Patents

A kind of anti-interference emission system design method Download PDF

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Publication number
CN107196677A
CN107196677A CN201710452306.4A CN201710452306A CN107196677A CN 107196677 A CN107196677 A CN 107196677A CN 201710452306 A CN201710452306 A CN 201710452306A CN 107196677 A CN107196677 A CN 107196677A
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China
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module
sequence
dpss
orthogonal
cyclic shift
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CN201710452306.4A
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Chinese (zh)
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曹宇
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Hangzhou Xiao Nan Science And Technology Co Ltd
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Hangzhou Xiao Nan Science And Technology Co Ltd
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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
    • 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
    • H04B1/7097—Interference-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/002—Transmission systems not characterised by the medium used for transmission characterised by the use of a carrier modulation
    • H04B14/004—Amplitude modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords

Abstract

The invention discloses a kind of anti-interference modulate emission design method, cyclic shift orthogonal code generation module produces 32 cyclic shift orthogonal codes, the information for being produced information source module by mapping block produces frequency expansion sequence by 32 cyclic shift orthogonal code spread spectrum modulation, then bipolarity NRZ sequence is converted to by sequence transformation module again, the bipolarity NRZ sequence of 32 parallel arrangeds is converted to by serioparallel exchange module again, the bipolarity NRZ sequence of parallel arranged is carried out by pulse amplitude modulation with 32 DPSS sequences by orthogonal DPSS modulation modules respectively, produce the orthogonal DPSS modulated signals of 32 tunnel parallel arrangeds, the orthogonal DPSS modulated signals superposition of 32 tunnel parallel arrangeds is synthesized by signal all the way by signal synthesizing module, export to carrier modulation, frequency conversion, power amplifier module is handled, most radiated afterwards through Anneta module.The present invention improves anti-bursty interference ability, secrecy ability and the information transmitting efficiency of modulated signal.

Description

A kind of anti-interference emission system design method
Technical field
Set the present invention relates to radio modulation design method, more particularly to a kind of anti-interference wireless modulate emission system Meter method.
Background technology
For wireless communication system, due to the opening of space channel, the information transmitted will necessarily be by each letter The influence of road environment and disturbing factor, so as to produce mistake, reduces the reliability of information transfer.Modulation is in order that being transmitted Characteristics of signals matches with the characteristic of channel, by modulation, is transformed into being adapted to the signal form that channel is effectively transmitted.It is anti-interference Modulation technique be around the reliability for improving information transfer and a kind of modulation theory for being different from Conventional communication systems that proposes and Technology, abbreviation spread spectrum or spread spectrum technology, come across before World War II, are mainly used in encryption and ranging.Second After world war, the research of spread spectrum of the demand driving of jam-resistant communication system is exclusive by military field always, extensively Applied to the every field such as military communication, electronic countermeasure and navigation, measurement.Early 1980s spread spectrum starts application In commercial communication field.In order to meet the demand of growing commercial communication capacity and effectively utilize frequency spectrum resource, various countries It is all numerous and confused to propose to use spread spectrum in the personal communication of digital mobile cellular telecommunication, satellite mobile communication and future, spread spectrum Technology is widely used to the systems such as cell phone, wireless phone, microwave communication, RFDC, remote measurement, monitoring, alarm In.
However, being typically to be come with sacrificing the information transfer efficiency of communication system in the prior art for band spectrum modulation The antijamming capability of raising system.Therefore, how while the antijamming capability of the system of raising, preferably letter can also be kept Breath efficiency of transmission is the difficulties of communication systems.
The content of the invention
It is an object of the invention to solve the antijamming capability of wireless communication system, anti-bursty interference energy is made it have Power.Another object of the present invention is system is kept preferable information transfer simultaneously, also in the antijamming capability of the system of raising Efficiency.A further object of the invention is that frequency expansion sequence is handled using encryption method, it is strengthened safe and secret ability.
In order to realize the purpose of the present invention, the ability of the anti-bursty interference of system is improved, the invention provides one kind is anti-interference Modulate emission design method, in addition to information source module, carrier modulation block, frequency-variable module, power amplifier module, Anneta module, also Including with lower module：
Cyclic shift orthogonal code generation module：It is used to produce 32 cyclic shift orthogonal codes 01111100111010010000101011101100；
Mapping block：Its binary digital information waiting for transmission for being used to produce information source module passes through 32 cyclic shifts The band spectrum modulation of orthogonal code 01111100111010010000101011101100 produces 32 frequency expansion sequences；
Sequence transformation module：It is used to 32 frequency expansion sequences being converted to the bipolarity NRZ that dutycycle is 1/3rd Sequence；
Serioparallel exchange module：Its sequence for being used for the serial arrangement for exporting sequence transformation module is converted to 32 parallel rows The bipolarity NRZ sequence of row；
DPSS sequence generation modules：It is used to produce 32 DPSS (Discrete Prolate Spheroidal Sequences, abbreviation DPSS) sequence；
Orthogonal DPSS modulation modules：It is used for by the bipolarity NRZ sequence of 32 parallel arrangeds respectively with 32 DPSS Sequence carries out orthogonal pulses amplitude modulation(PAM), produces the orthogonal DPSS modulated signals of 32 tunnel parallel arrangeds；
Signal synthesizing module：It is used to synthesize the orthogonal DPSS modulated signals superposition of 32 tunnel parallel arrangeds believes all the way Number；
Wherein, carrier-modulated module is carried out after sinusoidal carrier modulation the signal of signal synthesizing module output again, through frequency conversion The centre frequency of signal is converted into tranmitting frequency by module, and then carrying out power amplification through power amplifier module again exports to antenna mould Block, most carries out signal radiation through Anneta module afterwards.
Further, in order to realize the purpose of the present invention, improve system antijamming capability make simultaneously, also system keep compared with Good information transfer efficiency, anti-interference modulate emission design method of the present invention, in addition to：
Packet module：Its binary message waiting for transmission for being used to produce information source module is first divided into mono- with 5bit The data group of position, then band spectrum modulation is carried out by mapping block；
Circular shift module：It is used for 32 cyclic shift orthogonal codes produced by cyclic shift orthogonal code generation module Using cyclic shift mode, each ring shift right one is produced other 31 cyclic shift orthogonal codes with this, is obtained with this The cyclic shift orthogonal code of 32 different displaced conditions, the 5bit data groups then produced again with packet module are carried out one by one Mapping, completes band spectrum modulation；
Wherein, produced by circular shift module the cyclic shift orthogonal code and packet mould of the different displaced conditions of 32 The mapping relations of 32 states of the 5bit data groups produced by block, it is specific as follows：
Ring shift right 0 time：{a0,a1,a2,…,a29,a30,a31Data group 00000 is represented,
Ring shift right 1 time：{a31,a0,a1,a2,…,a29,a30Data group 00001 is represented,
Ring shift right 2 times：{a30,a31,a0,a1,a2,…,a29Data group 00010 is represented,
...,
Ring shift right 31 times：{a1,a2,…,a29,a30,a31,a0Data group 11111 is represented,
Wherein, the orthogonal code { a of ring shift right 0 time0,a1,a2,…,a29,a30,a31Correspond to 01111100111010010000101011101100, mapping block completes 32 states of 5bit data groups and 32 circulate The mapping of shift-orthogonal code, so as to realize the band spectrum modulation to 5bit data groups.
Further, in order to realize the purpose of the present invention, the secrecy ability of information transfer, described anti-interference modulation hair are improved Design method is penetrated, in addition to：
Pseudo-random sequence generation module：Cryptographic calculation is participated in for producing pseudo-random sequence, and being delivered to encrypting module；
Encrypting module：For 32 frequency expansion sequences produced by mapping block first to be produced with pseudo-random sequence generation module Pseudo-random sequence be encrypted to form a new sequence, sequence transformation module, transmitting terminal and receiving terminal are then delivered to again Agreement uses which kind of pseudo-random sequence and AES in advance.
Compared with prior art, the present invention has the advantages that：
1. because the present invention is using 32 01111100111010010000101011101100 pair of cyclic shift orthogonal codes Information waiting for transmission carries out band spectrum modulation, makes it have antijamming capability, and the present invention uses sequence transformation module, makes spread spectrum simultaneously Sequence is converted to the bipolarity NRZ sequence that dutycycle is 1/3rd, frequency expansion sequence is designed using pulse mode, enters one Step improves the ability of spread spectrum, so that emission system is provided with stronger spread spectrum antijamming capability.
2. because the present invention is using DPSS sequences progress modulates information, DPSS sequences in time-frequency domain there is preferable energy to gather Collect characteristic, under the conditions of same time bandwidth product, compared with other signals, limited band can be farthest concentrated on frequency domain In wide, so as to improve the power utilization of modulated signal, therefore, modulates information design is carried out using DPSS sequences, can be maximum The energy accumulating of the raising modulated signal of degree, so as to enhance the signal interference ratio of modulated signal, improves antijamming capability.
3. because the present invention uses cyclic shift orthogonal code to use cyclic shift mode, 32 different arrangements are obtained with this suitable The cyclic shift orthogonal code of sequence, the data group of 5bit information, i.e., one group are represented with the cyclic shift orthogonal code of different displaced conditions Cyclic shift orthogonal code can realize the band spectrum modulation of 5bit information, and traditional modulated spread spectrum signal is typically only capable to carry 1bit Information, considerably increases the information efficiency of system.
4. in the present invention, the DPSS sequences used are from the DPSS that first 32 are arranged by frequency domain energy concentration degree descending Sequence carries out orthogonal modulation, and the DPSS sequences of selection are not only mutually orthogonal two-by-two, and their frequency spectrum is mutually mixed on frequency domain Stack, therefore, when carrying out orthogonal modulation from DPSS sequences, information transfer bandwidth can be significantly saved, so as to improve letter Cease efficiency of transmission.
5. because the present invention first is encrypted to form a new sequence using by frequency expansion sequence with pseudo-random sequence, then Orthogonal modulation is carried out with DPSS sequences again, so as to improve the secrecy ability of the information transmission system.
The other advantages and features of the present invention embody part by following explanation, and part is also by by the present invention's Study and put into practice and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is band spectrum modulation emission system design diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text Word can be implemented according to this.
As shown in figure 1, anti-interference modulate emission design method disclosed in this invention, except information source module, carrier wave are adjusted Molding block, frequency-variable module, power amplifier module, outside Anneta module, in addition to lower module：
Cyclic shift orthogonal code generation module：It is used to produce 32 cyclic shift orthogonal codes 01111100111010010000101011101100；
Mapping block：Its binary digital information waiting for transmission for being used to produce information source module passes through 32 cyclic shifts The band spectrum modulation of orthogonal code 01111100111010010000101011101100 produces 32 frequency expansion sequences；
Sequence transformation module：It is used to 32 frequency expansion sequences being converted to the bipolarity NRZ that dutycycle is 1/3rd Sequence；
Serioparallel exchange module：Its sequence for being used for the serial arrangement for exporting sequence transformation module is converted to 32 parallel rows The bipolarity NRZ sequence of row；
DPSS sequence generation modules：It is used to produce 32 DPSS sequences；
Orthogonal DPSS modulation modules：It is used for by the bipolarity NRZ sequence of 32 parallel arrangeds respectively with 32 DPSS Sequence carries out pulse amplitude modulation, produces the orthogonal DPSS modulated signals of 32 tunnel parallel arrangeds；
Signal synthesizing module：It is used to synthesize the orthogonal DPSS modulated signals superposition of 32 tunnel parallel arrangeds believes all the way Number；
Wherein, carrier-modulated module is carried out after sinusoidal carrier modulation the signal of signal synthesizing module output again, through frequency conversion The centre frequency of signal is converted into tranmitting frequency by module, and then carrying out power amplification through power amplifier module again exports to antenna mould Block, most carries out signal radiation through Anneta module afterwards.
From the characteristic of DPSS sequences, compared with other signals, DPSS sequences in time-frequency domain there is preferable energy to gather Collect characteristic, under the conditions of same time bandwidth product, the DPSS sequences that there are multiple mutual pairwise orthogonals can maximum journey on frequency domain That spends concentrates in finite bandwidth, and their the mutual aliasing of frequency spectrum is together.Therefore, in the present invention, DPSS sequences are utilized The characteristic of pairwise orthogonal and the mutual aliasing of frequency spectrum, carries out orthogonal DPSS modulation to information, makes the frequency spectrum of 32 modulated signals mutual Aliasing has saved information transfer bandwidth together, significantly；For receiving terminal, using the pairwise orthogonal characteristic of DPSS sequences Complete the separation to each road signal.
In the present invention, described DPSS sequences, which are selected, presses the DPSS sequences that frequency domain energy concentration degree descending arranges first 32 Row, can farthest improve the energy accumulating of modulated signal, so as to enhance the signal interference ratio of modulated signal, improve anti-dry Disturb ability.
Further, in order to realize the purpose of the present invention, improve system antijamming capability make simultaneously, also system keep compared with Good information transfer efficiency, the present invention described anti-interference modulate emission design method, in addition to：
Packet module：Its binary message waiting for transmission for being used to produce information source module is first divided into mono- with 5bit The data group of position, then band spectrum modulation is carried out by mapping block；
Circular shift module：It is used for 32 cyclic shift orthogonal codes produced by cyclic shift orthogonal code generation module Using cyclic shift mode, each ring shift right one is produced other 31 cyclic shift orthogonal codes with this, is obtained with this The cyclic shift orthogonal code of 32 different displaced conditions, the 5bit data groups then produced again with packet module are carried out one by one Mapping, completes band spectrum modulation；
Wherein, produced by circular shift module the cyclic shift orthogonal code and packet mould of the different displaced conditions of 32 The mapping relations of 32 states of the 5bit data groups produced by block, it is specific as follows：
Ring shift right 0 time：{a0,a1,a2,…,a29,a30,a31Data group 00000 is represented,
Ring shift right 1 time：{a31,a0,a1,a2,…,a29,a30Data group 00001 is represented,
Ring shift right 2 times：{a30,a31,a0,a1,a2,…,a29Data group 00010 is represented,
...,
Ring shift right 31 times：{a1,a2,…,a29,a30,a31,a0Data group 11111 is represented,
Wherein, the orthogonal code { a of ring shift right 0 time0,a1,a2,…,a29,a30,a31Correspond to 01111100111010010000101011101100, mapping block completes 32 states of 5bit data groups and 32 circulate The mapping of shift-orthogonal code, so as to realize the band spectrum modulation to 5bit data groups.I.e. one group cyclic shift orthogonal code can be realized The band spectrum modulation of 5bit information, and traditional modulated spread spectrum signal is typically only capable to carry 1bit information, considerably increases system Information efficiency.
Further, in order to realize the purpose of the present invention, the secrecy ability of information transfer, described anti-interference modulation hair are improved Design method is penetrated, in addition to：
Pseudo-random sequence generation module：Cryptographic calculation is participated in for producing pseudo-random sequence, and being delivered to encrypting module；
Encrypting module：To be formed for 32 frequency expansion sequences produced by mapping block to be first encrypted with pseudo-random sequence One new sequence, is then delivered to sequence transformation module again, and transmitting terminal and receiving terminal arrange which kind of pseudorandom sequence used in advance Row and AES.
It is preferred that, pseudo-random sequence generation module of the present invention produces chaos sequence, and encrypting module is added using XOR Close algorithm.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed Operational mode.It can be applied to various suitable the field of the invention completely., can for those skilled in the art Easily realize other modification.Therefore under the universal limited without departing substantially from claim and equivalency range, the present invention It is not limited to specific details and shown here as the legend with description.

Claims (5)

1. a kind of anti-interference modulate emission design method, except information source module, carrier modulation block, frequency-variable module, power amplifier mould Outside block, Anneta module, in addition to lower module：
Cyclic shift orthogonal code generation module：It is used to produce 32 cyclic shift orthogonal codes 01111100111010010000101011101100；
Mapping block：The binary digital information waiting for transmission that it is used to produce information source module is orthogonal by 32 cyclic shifts 01111100111010010000101011101100 band spectrum modulation of code produces 32 frequency expansion sequences；
Sequence transformation module：It is used to 32 frequency expansion sequences being converted to the bipolarity NRZ sequence that dutycycle is 1/3rd Row；
Serioparallel exchange module：Its sequence for being used for the serial arrangement for exporting sequence transformation module is converted to 32 parallel arrangeds Bipolarity NRZ sequence；
DPSS sequence generation modules：It is used to produce 32 DPSS sequences；
Orthogonal DPSS modulation modules：It is used for by the bipolarity NRZ sequence of 32 parallel arrangeds respectively with 32 DPSS sequences Orthogonal pulses amplitude modulation(PAM) is carried out, the orthogonal DPSS modulated signals of 32 tunnel parallel arrangeds are produced；
Signal synthesizing module：It is used to the orthogonal DPSS modulated signals superposition of 32 tunnel parallel arrangeds synthesizing signal all the way；
Wherein, carrier-modulated module is carried out after sinusoidal carrier modulation the signal of signal synthesizing module output again, through frequency-variable module The centre frequency of signal is converted into tranmitting frequency, then carrying out power amplification through power amplifier module again exports to Anneta module, most Signal radiation is carried out by Anneta module.
2. anti-interference modulate emission design method according to claim 1, it is characterised in that also include：
Packet module：Its binary message waiting for transmission for being used to produce information source module is first divided into 5bit units Data group, then band spectrum modulation is carried out by mapping block；
Circular shift module：It is used to use 32 cyclic shift orthogonal codes produced by cyclic shift orthogonal code generation module Cyclic shift mode, each ring shift right one produces other 31 cyclic shift orthogonal codes, 32 be obtained with this with this The cyclic shift orthogonal code of different displaced conditions, the 5bit data groups then produced again with packet module are reflected one by one Penetrate, complete band spectrum modulation；
Wherein, produced by circular shift module the cyclic shift orthogonal code of the different displaced conditions of 32 and packet module institute The mapping relations of 32 states of the 5bit data groups of generation, it is specific as follows：
Ring shift right 0 time：{a0,a1,a2,…,a29,a30,a31Data group 00000 is represented,
Ring shift right 1 time：{a31,a0,a1,a2,…,a29,a30Data group 00001 is represented,
Ring shift right 2 times：{a30,a31,a0,a1,a2,…,a29Data group 00010 is represented,
...,
Ring shift right 31 times：{a1,a2,…,a29,a30,a31,a0Data group 11111 is represented,
Wherein, the orthogonal code { a of ring shift right 0 time0,a1,a2,…,a29,a30,a31Correspond to 01111100111010010000101011101100, mapping block completes 32 states of 5bit data groups and 32 circulate The mapping of shift-orthogonal code, so as to realize the band spectrum modulation to 5bit data groups.
3. anti-interference modulate emission design method according to claim 2, it is characterised in that also include：
Pseudo-random sequence generation module：Cryptographic calculation is participated in for producing pseudo-random sequence, and being delivered to encrypting module；
Encrypting module：For the puppet for first producing 32 frequency expansion sequences produced by mapping block with pseudo-random sequence generation module Random sequence is encrypted to form a new sequence, and sequence transformation module is then delivered to again, and transmitting terminal and receiving terminal are prior Agreement uses which kind of pseudo-random sequence and AES.
4. anti-interference modulate emission design method according to claim 3, it is characterised in that described pseudorandom sequence Row generation module produces chaos sequence, and encrypting module uses XOR AES.
5. the anti-interference modulate emission design method according to Claims 1-4 any one claim, its feature It is, described DPSS sequences select the preceding 32 DPSS sequences arranged by frequency domain energy concentration degree descending.
CN201710452306.4A 2017-06-15 2017-06-15 A kind of anti-interference emission system design method Withdrawn CN107196677A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107634781A (en) * 2017-10-15 2018-01-26 天津飞眼无人机科技有限公司 Unmanned plane countercharge system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107634781A (en) * 2017-10-15 2018-01-26 天津飞眼无人机科技有限公司 Unmanned plane countercharge system

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