CN108768474A - A kind of MIMO detection equalization methods and system based on 5G communication networks - Google Patents
A kind of MIMO detection equalization methods and system based on 5G communication networks Download PDFInfo
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- CN108768474A CN108768474A CN201810368087.6A CN201810368087A CN108768474A CN 108768474 A CN108768474 A CN 108768474A CN 201810368087 A CN201810368087 A CN 201810368087A CN 108768474 A CN108768474 A CN 108768474A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/024—Channel estimation channel estimation algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
Abstract
The MIMO detection equalization methods and system, the equalization methods that the present invention relates to a kind of based on 5G communication networks include：Transmitting signal, reception signal, channel impulse response and the noise variance value during transmission are obtained based on ant group algorithm；Conjugate operation is carried out to channel impulse response, obtains conjugate channel shock response；Balance factor is calculated according to transmitting signal, channel impulse response, noise variance value and conjugate channel shock response；It is equalized estimated value by balance factor and reception signal.The embodiment of the present invention calculates the balance factor of equalization methods according to transmitting signal, reception signal, channel impulse response and noise variance value, it is equalized estimated value by balance factor, the problem of being interfered between signal caused by distorted signals in multi-input multi-output system is eliminated by the equilibrium estimated value, the bit error rate is reduced, the performance of communication is improved.
Description
Technical field
The present invention relates to wireless communication technology fields more particularly to a kind of MIMO based on 5G communication networks to detect equilibrium side
Method and system.
Background technology
Extensive multi-input multi-output system is acknowledged as one of the important technology of the 5th generation wireless communication system.The skill
Art provides higher spectrum efficiency, faster peak data rate and ratio by being equipped with a large amount of antennas in base station and user terminal
The better energy efficiency of traditional small-scale mimo system.However, along with the substantial increase of number of antennas, in extensive MIMO systems
The complexity of Baseband algorithms is also sharply increasing in system.Wherein, the best multi-user test method of uplink, such as maximum is seemingly
So detection and maximum a posteriori method will become difficult to bear in terms of the computation complexity.Therefore, more feasible and efficient detection
Device design has attracted a large amount of concerns.
Invention content
Of the existing technology in order to solve the problems, such as, at least one embodiment of the present invention provides a kind of based on 5G communications
The MIMO of network detects equalization methods, including：
Transmitting signal, reception signal, channel impulse response and the noise during transmission are obtained based on ant group algorithm
Variance yields；
Conjugate operation is carried out to the channel impulse response, obtains conjugate channel shock response；
Calculate MIMO's according to the transmitting signal, channel impulse response, noise variance value and conjugate channel shock response
Balance factor；
It is equalized estimated value by the balance factor and the reception signal.
Based on the above-mentioned technical proposal, the embodiment of the present invention can also make following improvement.
Optionally, transmitting signal, reception signal, channel impulse response and the noise side obtained during transmission
Difference specifically includes：
Based on the transmitting signal and reception signal during ant group algorithm acquisition transmission；
By the transmitting signal and receive the signal calculating channel impulse response and the noise variance.
Optionally, described according to the transmitting signal, channel impulse response, noise variance value and conjugate channel shock response
Balance factor is calculated, is specifically included：
The transmitting signal, channel impulse response, noise variance value and conjugate channel shock response are substituted into following calculate
Formula calculates the balance factor：
W=(HHH+σ2I)-1HH；
Wherein, W is the balance factor, and H is the channel impulse response, HHFor the conjugate channel shock response, σ2For
The noise variance value, I are the transmitting signal.
Optionally, described that estimated value is equalized by the balance factor and the reception signal, it specifically includes：
The equilibrium is calculated by following estimated value calculation formula in the balance factor and the reception signal to estimate
Evaluation：
S=W × r=(HHH+σ2I)-1HHr；
Wherein, S is the balanced estimated value, and W is the balance factor, and H is the channel impulse response, HHIt is described total
Yoke channel impulse response, σ2For the noise variance value, I is the transmitting signal, and r is the reception signal.
Optionally, which further includes：
Following second estimated value calculation formula is obtained by the estimated value calculation formula：
First calculated by arithmetic logic unit in the second estimated value calculation formula as lower part obtains the first result：
Another part in the second estimated value calculation formula, which is calculated, by another arithmetic logic unit obtains the second knot
Fruit：
First result is multiplied with the second result to obtain the balanced estimated value.
The embodiment of the present invention additionally provides a kind of equal balance system of MIMO detections based on 5G communication networks, including：Obtain son
System, computing subsystem, processing subsystem；
The acquisition subsystem, for based on ant group algorithm obtain transmission during transmitting signal, receive signal,
Channel impulse response and noise variance value；
The computing subsystem obtains conjugate channel impact and rings for carrying out conjugate operation to the channel impulse response
It answers；
The computing subsystem is additionally operable to according to the transmitting signal, channel impulse response, noise variance value and conjugation letter
Road shock response calculates the balance factor of MIMO；
The processing subsystem, for being equalized estimated value by the balance factor and the reception signal.
Optionally, the acquisition subsystem includes：Channel estimation module and Noise Variance Estimation module；
The channel estimation module, for obtaining channel impulse response according to the transmitting signal and reception signal；
The Noise Variance Estimation module, for obtaining the noise variance according to the transmitting signal and reception signal
Value.
Optionally, the computing subsystem is specifically used for the transmitting signal, channel impulse response, noise variance value
Following calculation formula, which is substituted into, with conjugate channel shock response calculates the balance factor：
W=(HHH+σ2I)-1HH；
Wherein, W is the balance factor, and H is the channel impulse response, HHFor the conjugate channel shock response, σ2For
The noise variance value, I are the transmitting signal.
Optionally, the processing subsystem is specifically used for the balance factor and described through the computing subsystem
It receives signal and the balanced estimated value is calculated by following estimated value calculation formula：
S=W × r=(HHH+σ2I)-1HHr；
Wherein, S is the balanced estimated value, and W is the balance factor, and H is the channel impulse response, HHIt is described total
Yoke channel impulse response, σ2For the noise variance value, I is the transmitting signal, and r is the reception signal.
Optionally, the computing subsystem includes：At least two arithmetic logic units；
The processing subsystem is additionally operable to obtain following second estimated value calculating public affairs by the estimated value calculation formula
Formula：
First calculated by arithmetic logic unit in the second estimated value calculation formula as lower part obtains the first result：
Another part in the second estimated value calculation formula, which is calculated, by another arithmetic logic unit obtains the second knot
Fruit：
First result is multiplied by the computing subsystem to obtain the balanced estimated value with the second result.
The above-mentioned technical proposal of the present invention has the following advantages that compared with prior art：The embodiment of the present invention is believed according to transmitting
Number, receive signal, channel impulse response and noise variance value calculate the balance factor of equalization methods, obtained by balance factor
Weigh estimated value, by being interfered between signal caused by distorted signals in equilibrium estimated value elimination multi-input multi-output system
The problem of, the bit error rate is reduced, the performance of communication is improved.
Description of the drawings
Fig. 1 is a kind of MIMO detection equalization methods flow charts based on 5G communication networks provided in an embodiment of the present invention；
Fig. 2 is a kind of MIMO detection equalization methods flows based on 5G communication networks that another embodiment of the present invention provides
Figure；
Fig. 3 is a kind of MIMO detection equalization methods flows based on 5G communication networks that further embodiment of this invention provides
Figure；
Fig. 4 is that a kind of balanced system structure of MIMO detections based on 5G communication networks that further embodiment of this invention provides is shown
It is intended to.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of MIMO based on 5G communication networks provided in an embodiment of the present invention detects equalization methods, packet
It includes：
S11, based on ant group algorithm obtain transmission during transmitting signal, receive signal, channel impulse response and
Noise variance value.
Specifically, in the present embodiment, in mimo system, i.e., in multi-input multi-output system, transmitting signal and reception are believed
Number number it is more, based on ant group algorithm obtain transmission during transmitting signal and receive signal, pass through emit signal
The channel impulse response and noise variance that transmission channel is calculated with reception signal, for example, channel impulse response computational methods include
LS least squares estimates, DFT methods of estimation, MMSE methods of estimation and MLS methods of estimation；The computational methods of noise variance include
LS difference algorithms, are based on MMSE Noise Variance Estimation algorithms at DFT Frequency domain noise variance evaluations method.
S12, conjugate operation is carried out to channel impulse response, obtains conjugate channel shock response.
S13, calculate MIMO's according to transmitting signal, channel impulse response, noise variance value and conjugate channel shock response
Balance factor.
Specifically, in the present embodiment, passing through the transmitting signal during transmission, channel impulse response, noise side
Difference and conjugate channel shock response, calculate the balance factor of MIMO, for example, balanced algorithms most in use includes matched filtering side
Method, ZF equalization methods and MMSE equalization methods can be calculated accordingly by the parameter provided in the above method and the present embodiment
Balance factor calculates conjugate channel shock response, thus by channel impulse response by channel impulse response in this step
Imaginary part and real part are converted to corresponding real number, facilitate and are calculated.
S14, estimated value is equalized by balance factor and reception signal.
Specifically, balance factor obtained by calculation and the reception signal eventually received obtain corresponding balanced estimation
Value can dock the collection of letters number by the equilibrium estimated value and carry out equilibrium treatment, it is ensured that preferable demodulation performance.
In above-described embodiment, by transmitting signal in the mimo system that gets and signal is received, is calculated in the system
Channel impulse response and noise variance value, which is calculated according to transmitting signal, channel impulse response and noise variance value
The balance factor of system obtains corresponding equilibrium estimated value by balance factor and reception signal, is carried out for docking the collection of letters number
Weighing apparatus processing, reduces the signal error rate after demodulation, improves the performance of communication.
In the present embodiment, transmitting signal, reception signal, channel impulse response and the noise during transmission are obtained
Variance yields specifically includes：
Based on the transmitting signal and reception signal during ant group algorithm acquisition transmission, in mimo systems, transmitting
Signal and the amount for receiving signal are all very huge, and signal is made to pass through the mutiple antennas transmission of transmitting terminal and receiving terminal and receive, from
And improve communication quality.It can make full use of space resources, realize multiple-input multiple-output by mutiple antennas, do not increasing frequency spectrum resource
In the case of antenna transmission power, system channel capacity can be increased exponentially, although a large amount of data can improve communication
Quality, but the difficulty of calculating process can be increased, it is dense according to the link information element of itself based on ant group algorithm in this programme
Degree selection transmitting signal and reception signal, reduce data processing amount, improve computational efficiency.
Channel impulse response and noise variance are calculated by emitting signal and receiving signal；Specifically, in the present embodiment,
Transmitting signal and reception signal are handled by ant group algorithm, transmitting signal is selected according to the link information element concentration of itself
Channel impulse response and noise variance are calculated with signal is received, reduce transmitting signal and receives the quantity of signal, improves and calculates effect
Rate.
As shown in Fig. 2, the embodiment of the present invention additionally provides a kind of MIMO detection equalization methods based on 5G communication networks, packet
It includes：
S21, based on ant group algorithm obtain transmission during transmitting signal, receive signal, channel impulse response and
Noise variance value.
Specifically, in the present embodiment, in mimo system, i.e., in multi-input multi-output system, transmitting signal and reception are believed
Number number it is more, obtain transmission during transmitting signal and receive signal, pass through emit signal and receive signal meter
Calculate the channel impulse response and noise variance of transmission channel.
S22, conjugate operation is carried out to channel impulse response, obtains conjugate channel shock response.
S23, transmitting signal, channel impulse response, noise variance value and conjugate channel shock response are substituted into following calculate
Formula calculates balance factor：
W=(HHH+σ2I)-1HH；
Wherein, W is balance factor, and H is channel impulse response, HHFor conjugate channel shock response, σ2For noise variance value, I
To emit signal.
S24, balanced estimated value is calculated by following estimated value calculation formula in balance factor and reception signal：
S=W × r=(HHH+σ2I)-1HHr；
Wherein, S is balanced estimated value, and W is balance factor, and H is channel impulse response, HHFor conjugate channel shock response, σ2
For noise variance value, I is transmitting signal, and r is to receive signal.
In above-described embodiment, by emitting signal, channel impulse response, noise variance value and conjugate channel shock response meter
Calculate the balance factor of the mimo transmission system, and by it and receive signal multiplication, wherein reception signal in above-mentioned formula and
Transmitting signal is the bit value of the bit value and transmitting signal that receive signal, is equalized estimated value, is estimated by the equilibrium
Value docking, which is collected mail, number carries out an equilibrium treatment, improve it is new to the demodulation of the reception signal after equalized can, reduce the bit error rate.
As shown in figure 3, the embodiment of the present invention additionally provides a kind of MIMO detection equalization methods based on 5G communication networks, packet
It includes：
S31, based on ant group algorithm obtain transmission during transmitting signal, receive signal, channel impulse response and
Noise variance value.
Specifically, in the present embodiment, in mimo system, i.e., in multi-input multi-output system, transmitting signal and reception are believed
Number number it is more, obtain transmission during transmitting signal and receive signal, pass through emit signal and receive signal meter
Calculate the channel impulse response and noise variance of transmission channel.
S32, conjugate operation is carried out to channel impulse response, obtains conjugate channel shock response.
S33, transmitting signal, channel impulse response, noise variance value and conjugate channel shock response are substituted into following calculate
Formula calculates balance factor：
W=(HHH+σ2I)-1HH；
Wherein, W is balance factor, and H is channel impulse response, HHFor conjugate channel shock response, σ2For noise variance value, I
To emit signal.
S34, balanced estimated value is calculated by following second estimated value calculation formula in balance factor and reception signal：
S35, first calculated by arithmetic logic unit in the second estimated value calculation formula as lower part obtains the first result：
S36, the second knot is obtained by another part in another arithmetic logic unit the second estimated value calculation formula of calculating
Fruit：
S37, the first result is multiplied with the second result is equalized estimated value.
Wherein, S is balanced estimated value, and W is balance factor, and H is channel impulse response, HHFor conjugate channel shock response, σ2
For noise variance value, I is transmitting signal, and r is to receive signal.
Specifically, in the present embodiment, being deformed to obtain above-mentioned to the estimated value calculation formula in above-described embodiment
Two estimated value calculation formula, the corresponding formula of the first result are matrix inversion, and the corresponding formula of the second result is matched filtering；Its
In, noise variance and transmitting signal are real number, and channel impulse response and conjugate channel shock response are conjugated each other, since division refers to
It enables the instruction occupied in the processor longer, the treatment progress of entire computing system can be occupied, it therefore, first will be suitable when realizing
The matrix of sequence transformation is exported, and is carried out matrix multiple with matched filtering, is obtained first and obtained as a result, being carried out at the same time division arithmetic
Second as a result, both reduce operation times in this way, while process utilization rate when improving division arithmetic.
As described in Figure 4, the embodiment of the present invention additionally provides a kind of equal balance system of MIMO detections based on 5G communication networks, packet
It includes：Obtain subsystem, computing subsystem, processing subsystem；Computing subsystem includes：At least two arithmetic logic units；
In the present embodiment, obtain subsystem, for based on ant group algorithm obtain transmission during transmitting signal,
Signal, channel impulse response and noise variance value are received, specifically, it includes channel estimation module and noise variance to obtain subsystem
Estimation module；Channel estimation module, for obtaining channel impulse response according to transmitting signal and reception signal；Noise Variance Estimation
Module, for obtaining noise variance value according to transmitting signal and reception signal.
In the present embodiment, computing subsystem obtains conjugate channel punching for carrying out conjugate operation to channel impulse response
Hit response.
In the present embodiment, computing subsystem, be additionally operable to according to transmitting signal, channel impulse response, noise variance value and
Conjugate channel shock response calculates the balance factor of MIMO, specifically, will transmitting signal, channel impulse response, noise variance value
Following calculation formula, which is substituted into, with conjugate channel shock response calculates balance factor：
W=(HHH+σ2I)-1HH；
Wherein, W is balance factor, and H is channel impulse response, HHFor conjugate channel shock response, σ2For noise variance value, I
To emit signal.
In the present embodiment, processing subsystem is equalized estimated value, specifically for passing through balance factor and receiving signal
, balance factor and reception signal are calculated by balanced estimation by following estimated value calculation formula by computing subsystem
Value：
S=W × r=(HHH+σ2I)-1HHr；
Wherein, S is balanced estimated value, and W is balance factor, and H is channel impulse response, HHFor conjugate channel shock response, σ2
For noise variance value, I is transmitting signal, and r is to receive signal；
Alternatively, processing subsystem, following second estimated value calculation formula is obtained by estimated value calculation formula：
First calculated by arithmetic logic unit in the second estimated value calculation formula as lower part obtains the first result：
Another part in the second estimated value calculation formula, which is calculated, by another arithmetic logic unit obtains the second result：
The first result is multiplied with the second result by computing subsystem and is equalized estimated value.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of MIMO based on 5G communication networks detects equalization methods, which is characterized in that including：
Transmitting signal, reception signal, channel impulse response and the noise variance during transmission are obtained based on ant group algorithm
Value；
Conjugate operation is carried out to the channel impulse response, obtains conjugate channel shock response；
The equilibrium of MIMO is calculated according to the transmitting signal, channel impulse response, noise variance value and conjugate channel shock response
The factor；
It is equalized estimated value by the balance factor and the reception signal.
2. MIMO according to claim 1 detects equalization methods, which is characterized in that described to obtain channel based on ant group algorithm
Transmitting signal, reception signal, channel impulse response in transmission process and noise variance value, specifically include：
Based on the transmitting signal and reception signal during ant group algorithm acquisition transmission；
By the transmitting signal and receive the signal calculating channel impulse response and the noise variance.
3. MIMO according to claim 1 detects equalization methods, which is characterized in that described according to the transmitting signal, letter
Road shock response, noise variance value and conjugate channel shock response calculate the balance factor of MIMO, specifically include：
The transmitting signal, channel impulse response, noise variance value and conjugate channel shock response are substituted into following calculation formula
Calculate the balance factor：
W=(HHH+σ2I)-1HH；
Wherein, W is the balance factor, and H is the channel impulse response, HHFor the conjugate channel shock response, σ2It is described
Noise variance value, I are the transmitting signal.
4. MIMO according to claim 3 detects equalization methods, which is characterized in that described to pass through the balance factor and institute
It states reception signal and is equalized estimated value, specifically include：
The balanced estimated value is calculated by following estimated value calculation formula in the balance factor and the reception signal：
S=W × r=(HHH+σ2I)-1HHr；
Wherein, S is the balanced estimated value, and W is the balance factor, and H is the channel impulse response, HHBelieve for the conjugation
Road shock response, σ2For the noise variance value, I is the transmitting signal, and r is the reception signal.
5. MIMO according to claim 4 detects equalization methods, which is characterized in that the equalization methods further include：
Following second estimated value calculation formula is obtained by the estimated value calculation formula：
First calculated by arithmetic logic unit in the second estimated value calculation formula as lower part obtains the first result：
Another part in the second estimated value calculation formula, which is calculated, by another arithmetic logic unit obtains the second result：
First result is multiplied with the second result to obtain the balanced estimated value.
6. a kind of MIMO based on 5G communication networks detects equal balance system, which is characterized in that including：It obtains subsystem, calculate son
System, processing subsystem；
The acquisition subsystem, for based on transmitting signal, reception signal, the channel during ant group algorithm acquisition transmission
Shock response and noise variance value；
The computing subsystem obtains conjugate channel shock response for carrying out conjugate operation to the channel impulse response；
The computing subsystem is additionally operable to be rushed according to the transmitting signal, channel impulse response, noise variance value and conjugate channel
Hit the balance factor of response computation MIMO；
The processing subsystem, for being equalized estimated value by the balance factor and the reception signal.
7. MIMO according to claim 6 detects equal balance system, which is characterized in that the acquisition subsystem includes：Channel
Estimation module and Noise Variance Estimation module；
The channel estimation module, for obtaining channel impulse response according to the transmitting signal and reception signal；
The Noise Variance Estimation module, for obtaining the noise variance value according to the transmitting signal and reception signal.
8. MIMO according to claim 6 detects equal balance system, which is characterized in that the computing subsystem is specifically used for
The transmitting signal, channel impulse response, noise variance value and conjugate channel shock response are substituted into following calculation formula to calculate
The balance factor：
W=(HHH+σ2I)-1HH；
Wherein, W is the balance factor, and H is the channel impulse response, HHFor the conjugate channel shock response, σ2It is described
Noise variance value, I are the transmitting signal.
9. MIMO according to claim 8 detects equal balance system, which is characterized in that the processing subsystem is specifically used for
The balance factor and the reception signal are calculated by following estimated value calculation formula by the computing subsystem
The equilibrium estimated value：
S=W × r=(HHH+σ2I)-1HHr；
Wherein, S is the balanced estimated value, and W is the balance factor, and H is the channel impulse response, HHBelieve for the conjugation
Road shock response, σ2For the noise variance value, I is the transmitting signal, and r is the reception signal.
10. MIMO according to claim 9 detects equal balance system, which is characterized in that the computing subsystem includes：At least
Two arithmetic logic units；
The processing subsystem is additionally operable to obtain following second estimated value calculation formula by the estimated value calculation formula：
First calculated by arithmetic logic unit in the second estimated value calculation formula as lower part obtains the first result：
Another part in the second estimated value calculation formula, which is calculated, by another arithmetic logic unit obtains the second result：
First result is multiplied by the computing subsystem to obtain the balanced estimated value with the second result.
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