CN105635028B - The production method and device of 256QAM signal - Google Patents
The production method and device of 256QAM signal Download PDFInfo
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- CN105635028B CN105635028B CN201511001049.XA CN201511001049A CN105635028B CN 105635028 B CN105635028 B CN 105635028B CN 201511001049 A CN201511001049 A CN 201511001049A CN 105635028 B CN105635028 B CN 105635028B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/365—Modulation using digital generation of the modulated carrier (not including modulation of a digitally generated carrier)
Abstract
The present invention discloses the production method and device of a kind of 256QAM signal, 256QAM cannot be directly compatible on hardware mainly for for certain mobile communication processors for only meeting LTE-A R-11 agreement, the problem of needing additionally to develop the hardware logic of 256QAM module, it proposes and a kind of is segmented the modulated continuous signal of QPSK or 16QAM using signal segmenter, and generate signal vector, it is signal vector configuration symbols vector using symbol generator, usage factor generator is signal vector configuration coefficients vector, by signal modulator by signal vector, symbolic vector and coefficient vector modulation become the element of a 256QAM signal, finally the element of the 256QAM signal of generation is cascaded with signal cascade device, form effective 256QAM signal Technical solution.The production method of 256QAM signal of the present invention can further generate 256QAM by existing modulation result, make the mobile communication processor for not supporting 256QAM originally, under the premise of not changing existing modulation module structure, the function of 256QAM is obtained by way of calculating.
Description
Technical field
The present invention relates to one kind, the present invention relates to wireless communication and digital processing field, in particular to a kind of 256QAM
The production method and device of signal.
Background technique
With being continuously increased for mobile communication system transmission rate request, the higher availability of frequency spectrum how is obtained as one
A urgent problem to be solved.In order to improve the availability of frequency spectrum, the modulation system of higher order is often used in mobile communication, so that
It obtains a modulation symbol and carries more bit informations, to obtain higher spectrum efficiency, while transmission rate is substantially improved.It moves
Common modulation system has QPSK, 16QAM, 64QAM etc. in dynamic communication system, as the refinement and spectrum efficiency of application scenarios are wanted
The increase asked, 256QAM mode gradually start to be used.Increase compared to the bit number that 64QAM, 256QAM are carried by from 6 bits
Greatly 8 bits, the availability of frequency spectrum can increase by 30% or more.Third generation partner program (The 3rd Generation
Partnership Project, 3GPP) long term evolution (Long Term Evolution Advanced, LTE-A) mobile communication
R-12 and its more highest version in system just use the 256QAM mode mapped based on Gray.
Since 256QAM is the modulation system increased newly in LTE-A R-12 protocol version, only meet LTE- for certain
The mobile communication processor of A R-11 agreement, can not be directly compatible with 256QAM on hardware.Therefore, in order to increase 256QAM's
Function, traditional method are the hardware logics of additional exploitation 256QAM module, this all brings not to processor design and producing
Necessary cost overhead.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of production method of 256QAM signal, in the base of existing modulation system
On plinth, 256QAM signal is generated.
In order to achieve the above objectives, the production method of 256QAM signal of the present invention includes premodulated step, division step, generation
Symbol step, configuration coefficients step, modulation element step and element concatenation step；
Premodulated step: premodulated is carried out to bit stream, forms complex signal, the complex signal includes the road Q and the road I；
Division step: the road Q of the complex signal generated in premodulated step and the road I are divided into several roads Q signal segment and the road I
Signal segment takes each element of the road Q signal segment to form the road Q signal vector, and each element of the road I signal segment is taken to form the road I
Signal vector；
It generates symbol step: the road Q symbolic vector being calculated according to the road Q signal vector, according to the road the I signal vector meter
The road I symbolic vector is calculated, the element number of the symbolic vector is identical as the signal vector；
Configuration coefficients step: configuring the road Q coefficient vector for the road Q signal vector, configures I for the road I signal vector
Road coefficient vector, the element number of the coefficient vector are identical as the signal vector；
Modulate element step: by corresponding element phase in the road Q signal vector, the road Q symbolic vector and the road Q coefficient vector
Multiply, resulting product is added up, obtains the road the Q signal element of a 256QAM signal；By the road I signal vector, the road I symbol
Corresponding element multiplication in the coefficient vector of the road vector sum I, resulting product is added up, and obtains a 256QAM signal
The road I signal element；
Element concatenation step: the road the Q signal element of each 256QAM is cascaded, and forms 256QAM signal data stream
The road Q；The road the I signal element of each 256QAM is cascaded, the road I of 256QAM signal data stream is formed.
Further, the premodulated step is modulated signal using 16QAM modulator approach, the signal vector
Element number be 2, be expressed as [c1,c2]；The calculation method of the symbolic vector is as follows:
s1=1,
s2=2- (c1+ 4) mod4,
Wherein, siIndicate i-th of element of symbolic vector, ciIndicate that i-th of element of signal vector, mod indicate modulus fortune
It calculates.
Further, the premodulated step is modulated signal using 16QAM modulator approach, the calculating of coefficient vector
Method is as follows:
w1=4,
w2=1,
Wherein, wiFor i-th of element of coefficient vector.
Further, the premodulated step is modulated signal using QPSK, and the element of the signal vector is 4
It is a, it is expressed as [c1,c2,c3,c4]；The calculation method of the symbolic vector is as follows:
s1=1,
s2=-s1*sgn(c1),
s3=-s2*sgn(c2),
s4=-s3*sgn(c3),
Wherein, siIndicate i-th of element of symbolic vector, ciIndicate i-th of element of signal vector, sgn (x) expression obtains
The oeprator for evidence of fetching.
Further, the premodulated step is modulated signal using QPSK modulator approach, the calculating of coefficient vector
Method is as follows:
w1=8,
w2=4,
w3=2,
w4=1,
Wherein, wiFor i-th of element of coefficient vector.
The production method of 256QAM signal of the present invention can be under conditions of not increasing additional 256QAM module, existing
Modulation system on the basis of, by existing modulation result, the modulation result of 256QAM is obtained in such a way that numerical value calculates.This
The advantage of invention is to make not supporting the mobile communication processor of 256QAM originally, is not changing existing modulation module structure
Under the premise of, the function of 256QAM is obtained by way of calculating.
In view of the above-mentioned problems, the present invention provides a kind of generation device of 256QAM signal, in the base of existing modulation system
On plinth, 256QAM signal is generated.
In order to achieve the above objectives, the generation device of 256QAM signal of the present invention include signal preset, signal segmenter,
Symbol generator, coefficients generator, signal modulator and signal cascade device；Wherein,
Signal preset: for bit stream premodulated to be become the complex signal including the road Q and the road I；
Signal segmenter: for the road Q of the presetting full-time complex signal generated of signal and the road I to be divided into several signal segments,
And generate the road Q signal vector and the road I signal vector；
Symbol generator: for according to the road Q signal vector and the road I signal vector calculate the road Q symbolic vector and the road I symbol to
Amount；
Coefficients generator: for configuring the road Q coefficient vector for the road Q signal vector and being that the road I signal vector configures the road I coefficient
Vector；
Signal modulator: for the road Q signal vector, the road Q symbolic vector and the road Q coefficient vector to be modulated to a 256QAM
The road Q signal element；For the road I signal vector, the road I symbolic vector and the road I coefficient vector to be modulated to the road I of a 256QAM
Signal element；
Signal cascade device: for cascading the road the Q signal element of 256QAM, the road the Q signal of 256QAM is formed；By 256QAM
The road I signal element cascade, form the road the I signal of 256QAM.
Further, the premodulated device includes 16QAM modulating device；The symbol generator includes 16QAM signal
Vector obtains module and 16QAM symbolic vector computing module.
Further, the coefficient vector generator includes that 16QAM signal vector obtains module and 16QAM coefficient vector meter
Calculate module.
Further, the pre-conditioning unit includes QPSK modulating device；The symbol generator include QPSK signal to
Amount obtains module and QPSK symbolic vector computing module.
Further, the coefficient vector generator includes that QPSK signal vector obtains module and the calculating of QPSK coefficient vector
Module.
The generation device of 256QAM signal of the present invention can further generate 256QAM by existing modulation result.Do not increase
Add additional 256QAM module, on the basis of existing modulation system, directly calculates the modulation result of 256QAM.Of the invention
Advantage is to make not supporting the mobile communication processor of 256QAM originally, in the premise for not changing existing modulation module structure
Under, the function of 256QAM is obtained by way of calculating.
Detailed description of the invention
Fig. 1 is 256QAM signal generating method flow chart of the present invention；；
Fig. 2 is 256QAM signal generation device schematic diagram of the present invention；；
Fig. 3 is to generate 256QAM signal generation device schematic diagram using QPSK signal；
Fig. 4 is to generate 256QAM signal generation device schematic diagram using 16QAM signal.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings of the specification.
Embodiment 1
As shown in Figure 1, the production method of the 256QAM signal of the present embodiment includes premodulated step, division step, generation
Symbol step, configuration coefficients step, modulation element step and element concatenation step；
Premodulated step: premodulated is carried out to bit stream, forms complex signal, the complex signal includes the road Q and the road I；
Division step: the road Q of the complex signal generated in premodulated step and the road I are divided into several roads Q signal segment and the road I
Signal segment takes each element of the road Q signal segment to form the road Q signal vector, and each element of the road I signal segment is taken to form the road I
Signal vector；
It generates symbol step: the road Q symbolic vector being calculated according to the road Q signal vector, according to the road the I signal vector meter
The road I symbolic vector is calculated, the element number of the symbolic vector is identical as the signal vector；
Configuration coefficients step: configuring the road Q coefficient vector for the road Q signal vector, configures I for the road I signal vector
Road coefficient vector, the element number of the coefficient vector are identical as the signal vector；
Modulate element step: by corresponding element phase in the road Q signal vector, the road Q symbolic vector and the road Q coefficient vector
Multiply, resulting product is added up, obtains the road the Q signal element of a 256QAM signal；By the road I signal vector, the road I symbol
Corresponding element multiplication in the coefficient vector of the road vector sum I, resulting product is added up, and obtains a 256QAM signal
The road I signal element；
Element concatenation step: the road the Q signal element of each 256QAM is cascaded, and forms 256QAM signal data stream
The road Q；The road the I signal element of each 256QAM is cascaded, the road I of 256QAM signal data stream is formed.
Original continuous signal is segmented by the production method of the 256QAM signal of the present embodiment first, and every section reasonable
Allocation elements number, by the element extraction of every segment signal and composition signal vector, then for each signal vector configuration symbols to
Amount and coefficient vector finally by the operation to signal vector, symbolic vector and coefficient vector generate a 256QAM signal
Element, the element of each 256QAM signal, which is carried out cascade, can generate effective 256QAM signal data stream.From the process
In as can be seen that the production method of the present embodiment 256QAM signal can further be generated by existing modulation result
256QAM.Additional 256QAM module is not increased, on the basis of existing modulation system, by the tune that 256QAM is calculated
Result processed.Advantage of the invention is that the mobile communication processor for not supporting 256QAM originally can be made, has tune not changing
Under the premise of molding block structure, the function of 256QAM is obtained by way of calculating.
Embodiment 2
As shown in Fig. 2, the generation device of the present embodiment 256QAM signal include signal preset, signal segmenter 201,
Symbol generator 202, coefficients generator 203, signal modulator 204 and signal cascade device 205；Wherein,
Signal preset: for bit stream premodulated to be become the complex signal including the road Q and the road I；
Signal segmenter 201: for the road Q of the presetting full-time complex signal generated of signal and the road I to be divided into several signals
Section, and generate the road Q signal vector and the road I signal vector；
Symbol generator 202: for calculating the road Q symbolic vector and the road I symbol according to the road Q signal vector and the road I signal vector
Number vector；
Coefficients generator 203: for configuring the road Q coefficient vector for the road Q signal vector and being that the road I signal vector configures the road I
Coefficient vector；
Signal modulator 204: for the road Q signal vector, the road Q symbolic vector and the road Q coefficient vector to be modulated to one
The road the Q signal element of 256QAM；For the road I signal vector, the road I symbolic vector and the road I coefficient vector to be modulated to one
The road the I signal element of 256QAM；
Signal cascade device 205: for cascading the road the Q signal element of 256QAM, the road the Q signal of 256QAM is formed；It will
The road the I signal element of 256QAM cascades, and forms the road the I signal of 256QAM.
The generation device of the present embodiment 256QAM signal can further generate 256QAM by existing modulation result.No
Increase additional 256QAM module, on the basis of existing modulation system, directly calculates the modulation result of 256QAM.The present invention
Advantage be can to make not supporting the mobile communication processor of 256QAM originally, before not changing existing modulation module structure
It puts, the function of 256QAM is obtained by way of calculating.
Embodiment 3
As shown in figure 3, wherein the constellation point mapping mode of QPSK and 256QAM meets LTE-A R12 specification.The 256QAM
Generation device includes: QPSK signal premodulated device, QPSK signal segmenter 301, QPSK symbol generator 302, QPSK coefficient
Generator 303, signal modulator 304, signal cascade device 305.
Its method for generating 256QAM signal includes the following steps:
Signal premodulated step: bit stream modulation is become into QPSK complex signal using QPSK signal premodulated device
Signal subsection step: QPSK signal segmenter 301, the road I and Q number to existing continuous QPSK signal are utilized
According to being segmented, every section of element number is 4, forms signal vector [c1 c2 c3 c4]；
Symbol generation step: utilizing symbol generator 302, obtains the road I and the road Q oeprator vector [s1 s2 s3 s4],
And the road I is identical with the road Q oeprator vector, symbolic vector calculation is as follows:
s1=1,
s2=-s1*sgn(c1),
s3=-s2*sgn(c2),
s4=-s3*sgn(c3),
Wherein, siIndicate i-th of element of symbolic vector, ciIndicate i-th of element of signal vector, sgn (x) expression obtains
The oeprator for evidence of fetching.
Configuration coefficients step: usage factor generator 303, configuration obtain the road I and the road Q coefficient vector [w1 w2 w3 w4],
And the road I is identical with Q road transport calculation coefficient vector, coefficient vector calculation is as follows:
w1=8,
w2=4,
w3=2,
w4=1,
Wherein, wiFor i-th of element of coefficient vector.
It modulates element step: utilizing signal modulator 304, calculate the road I and the road Q element of a 256QAM signal, and the road I
It is identical with the calculation on the road Q, the road I of 256QAM signal or the road Q element calculation method are as follows:
Signal cascade step: utilizing signal cascade device 305, by the data on the road I of the 256QAM signal modulated and the road Q point
It is not cascaded, forms the road I and the Q circuit-switched data stream of effective 256QAM signal.
QPSK signal is converted into 256QAM signal by calculating by the present embodiment, is not increased additional hardware, is passed through
The modulation result of 256QAM can be obtained to further calculating for QPSK signal modulation result, make original incompatible 256QAM letter
Number equipment under the premise of not changing existing modulation module structure, the function of 256QAM is obtained by way of calculating.
Embodiment 4
As shown in figure 4, wherein the constellation point mapping mode of 16QAM and 256QAM meets LTE-A R12 specification.It can from Fig. 4
To find out, premodulated device to bit stream complete modulation after, generate 16QAM complex signal, at this point, will to 16QAM signal into
Row further converts, which includes: 16QAM signal premodulated device, 16QAM signal segmenter 401,
16QAM symbol generator 402,16QAM coefficients generator 403, signal modulator 404, signal cascade device 405.
It is carried out with reference to the accompanying drawings and examples in the present invention by the method and apparatus that 16QAM signal generates 256QAM
It is described in detail.
Premodulated step: bit stream modulation is become into 16QAM complex signal using 16QAM signal premodulated device；
Signal subsection step: signal segmenter 401, the road I and Q circuit-switched data to existing continuous 16QAM signal are utilized
It is segmented, every section of element number is 2, forms signal vector [c1 c2]；
Symbol generation step: utilizing symbol generator 402, obtains the road I and the road Q oeprator vector [s1 s2], and the road I and
The road Q oeprator vector is identical, and symbolic vector calculation is as follows:
s1=1,
s2=2- (c1+ 4) mod4,
Wherein, siIndicate i-th of element of symbolic vector, ciIndicate that i-th of element of signal vector, mod indicate modulus fortune
It calculates.
Configuration coefficients step: usage factor generator 403, configuration obtain the road I and the road Q coefficient vector [w1 w2 w3 w4],
And the road I is identical with Q road transport calculation coefficient vector, coefficient vector calculation is as follows:
w1=4,
w2=1,
Wherein, wiFor i-th of element of coefficient vector.
It modulates element step: utilizing signal modulator 404, calculate the road I and the road Q element of a 256QAM signal, and the road I
It is identical with the calculation on the road Q, the road I of 256QAM signal or the road Q element calculation method are as follows:
Element concatenation step: utilizing signal cascade device 405, by the data on the road I of the 256QAM signal modulated and the road Q point
It is not cascaded, forms the road I and the Q circuit-switched data stream of effective 256QAM signal.
16QAM signal is converted into 256QAM signal by calculating by the present embodiment, is not increased additional hardware, is passed through
The modulation result of 256QAM can be obtained to further calculating for 16QAM signal modulation result, make original incompatible 256QAM
The equipment of signal obtains the function of 256QAM under the premise of not changing existing modulation module structure by way of calculating.
More than, only presently preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with sheet
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover
Within protection scope of the present invention.Therefore, the scope of protection of the present invention shall be subject to the scope of protection defined by the claims.
Claims (10)
1. a kind of production method of 256QAM signal, it is characterised in that: including premodulated step, division step, generate symbol step
Suddenly, configuration coefficients step, modulation element step and element concatenation step；
Premodulated step: premodulated is carried out to bit stream, forms complex signal, the complex signal includes the road Q and the road I；
Division step: the road Q of the complex signal generated in premodulated step and the road I are divided into several roads Q signal segment and the road I signal
Section takes each element of the road Q signal segment to form the road Q signal vector, and each element of the road I signal segment is taken to form the road I signal
Vector；
It generates symbol step: the road Q symbolic vector is calculated according to the road Q signal vector, I is calculated according to the road I signal vector
Road symbolic vector, the element number of the symbolic vector are identical as the signal vector；
Configuration coefficients step: configuring the road Q coefficient vector for the road Q signal vector, configures the road I system for the road I signal vector
Number vector, the element number of the coefficient vector are identical as the signal vector；
Modulate element step:, will by corresponding element multiplication in the road Q signal vector, the road Q symbolic vector and the road Q coefficient vector
Resulting product adds up, and obtains the road the Q signal element of a 256QAM signal；By the road I signal vector, the road I symbolic vector
With corresponding element multiplication in the coefficient vector of the road I, resulting product is added up, obtains the road I of a 256QAM signal
Signal element；
Element concatenation step: the road the Q signal element of each 256QAM is cascaded, and forms the road Q of 256QAM signal data stream；
The road the I signal element of each 256QAM is cascaded, the road I of 256QAM signal data stream is formed.
2. the production method of 256QAM signal as described in claim 1, it is characterised in that: the premodulated step uses 16QAM
Modulator approach is modulated signal, and the element number of the signal vector is 2；The calculation method of the symbolic vector
It is as follows:
s1=1,
s2=2- (c1+ 4) mod4,
Wherein, siIndicate i-th of element of symbolic vector, ciIndicate that i-th of element of signal vector, mod indicate modulo operation.
3. the production method of 256QAM signal as claimed in claim 2, it is characterised in that: the calculation method of coefficient vector is as follows:
w1=4,
w2=1,
Wherein, wiFor i-th of element of coefficient vector.
4. the production method of 256QAM signal as described in claim 1, it is characterised in that: the premodulated step uses QPSK tune
Method processed is modulated signal, and the element of the signal vector is 4, and the calculation method of the symbolic vector is as follows:
s1=1,
s2=-s1*sgn(c1),
s3=-s2*sgn(c2),
s4=-s3*sgn(c3),
Wherein, siIndicate i-th of element of symbolic vector, ciIndicate that i-th of element of signal vector, sgn (x) indicate to obtain number
According to oeprator.
5. the production method of 256QAM signal as claimed in claim 4, it is characterised in that: the calculation method of coefficient vector is as follows:
w1=8,
w2=4,
w3=2,
w4=1,
Wherein, wiFor i-th of element of coefficient vector.
6. a kind of generation device of 256QAM signal, it is characterised in that: raw including signal preset, signal segmenter, symbol
It grows up to be a useful person, coefficients generator, signal modulator and signal cascade device；Wherein,
Signal preset: for bit stream premodulated to be become the complex signal including the road Q and the road I；
Signal segmenter: it for the road Q of the presetting full-time complex signal generated of signal and the road I to be divided into several signal segments, and produces
The raw road Q signal vector and the road I signal vector；
Symbol generator: for calculating the road Q symbolic vector and the road I symbolic vector according to the road Q signal vector and the road I signal vector；
Coefficients generator: for for the road Q signal vector configure the road Q coefficient vector and be the road I signal vector configure the road I coefficient to
Amount；
Signal modulator: for the road Q signal vector, the road Q symbolic vector and the road Q coefficient vector to be modulated to the Q of a 256QAM
Road signal element；Believe on the road I for the road I signal vector, the road I symbolic vector and the road I coefficient vector to be modulated to a 256QAM
Number element；
Signal cascade device: for cascading the road the Q signal element of 256QAM, the road the Q signal of 256QAM is formed；By the I of 256QAM
The cascade of road signal element, forms the road the I signal of 256QAM.
7. 256QAM signal generation device as claimed in claim 6, it is characterised in that: the premodulated device includes 16QAM tune
Device processed；The symbol generator includes that 16QAM signal vector obtains module and 16QAM symbolic vector computing module.
8. 256QAM signal generation device as claimed in claim 7, it is characterised in that: the coefficient vector generator includes
16QAM signal vector obtains module and 16QAM coefficient vector computing module.
9. 256QAM signal generation device as claimed in claim 6, it is characterised in that: the pre-conditioning unit includes QPSK modulation
Device；The symbol generator includes that QPSK signal vector obtains module and QPSK symbolic vector computing module.
10. 256QAM signal generation device as claimed in claim 9, it is characterised in that: the coefficient vector generator includes
QPSK signal vector obtains module and QPSK coefficient vector computing module.
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| CN102413094A (en) * | 2012-01-09 | 2012-04-11 | 桂林电子科技大学 | Method for constructing multimode quadrature amplitude modulation (QAM) uniform constellation diagram label and modulator |
| CN103152314A (en) * | 2012-12-17 | 2013-06-12 | 西安英菲泰尔电子科技有限公司 | Method of improving frequency spectrum efficiency of ultra-low power consumption wireless data communication |
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