CN103944842B - Channel equalization method and communication equipment - Google Patents
Channel equalization method and communication equipment Download PDFInfo
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- CN103944842B CN103944842B CN201310025014.4A CN201310025014A CN103944842B CN 103944842 B CN103944842 B CN 103944842B CN 201310025014 A CN201310025014 A CN 201310025014A CN 103944842 B CN103944842 B CN 103944842B
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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
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
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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
Abstract
The present invention relates to the communications field, a kind of channel equalization method and communication equipment are disclosed.Method includes：Receiver receives the information of the index of modulation, and the index of modulation includes：Pilot modulated coefficient and the data index of modulation；Receiver receives signal of communication, and the signal of communication includes：Pilot signal and data-signal；Receiver obtains the initial channel status information of the channel that the signal of communication passes through according to the pilot signal, known pilot transmission signal that receive and the pilot modulated coefficient；Receiver adjusts the initial channel status information according to the data index of modulation and pilot modulated coefficient, obtains each final channel condition information of the channel；According to each final channel condition information, the data-signal to receiving carries out channel equalization to receiver, and demodulation recovers to obtain the transmission signal of the data-signal.The accuracy of channel equalization can be improved using the technical scheme, data communication effect is improved.
Description
Technical field
The present invention relates to the communications field, the channel equalization method of more particularly to a kind of multiple input multiple output communications and communication
Equipment.
Background technology
The performance of wireless communication system is largely influenceed by wireless channel, such as shadow fading and frequency selectivity
Decline etc. so that the propagation path between transmitter and receiver is extremely complex.Wireless channel is not as wire message way and fixes
And it is foreseeable that but with very big randomness, this just proposes very big challenge to the design of receiver.
In existing communication system, in order to be able to accurately recover the sending signal people of transmitting terminal in receiving terminal using each
Influence of the multipath effect to transmission signal is resisted in kind of measure, it is necessary to which, in receive information, the parameter to channel is estimated,
Accurate channel condition information is obtained, then using accurate channel condition information, channel equalization is carried out in receiving terminal
(Channel Equalization) is correctly demodulating the transmission signal of the data-signal.
Current channel estimation methods are mainly as follows：Increase the pilot signal (Pilot of certain length in data-signal
Signal), the transmission signal of the pilot signal is predefined by procotol, pilot tone of the receiver in the signal for receiving
The pilot signal transmission value for receiving signal and receiver precognition of signal, calculates estimation and is worked as according to following functional expression (1)
The channel condition information of preceding channel：
Wherein,It is the channel state parameter of the channel that signal passes through, r receives the reception value of pilot signal for receiver,
P is the transmitted value of pilot signal known to receiver.
After receiving terminal obtains channel state parameter according to pilot signal, channel is carried out using the channel state parameter equal
Weighing apparatus, mainly according to following functional expression：Data-signal to receiving is carried out recovering balanced, and the number is recovered to demodulate
It is believed that number transmission signal, wherein, S for data-signal transmission signal, r for data-signal reception signal.
Because the different corresponding indexes of modulation of signal modulation mode in signal modulation is different, the data of prior art
In channel equalization, data-signal, pilot signal use same modulation system, so as to avoid in data emission process due to modulation
Coefficient is different and cause the error of channel estimation.
In addition, in the prior art, in order to ensure the accuracy of pilot signal, determining that pilot signal typically uses low order
The modulation system of modulation, and simultaneously with data communication technology develop, it is necessary to transmission data it is increasing, using low-order-modulated
Mode is modulated the abundant application for being unfavorable for Radio Resource to data-signal, easily causes wireless network data amount greatly, influence
The efficiency of network transmission.
The content of the invention
The purpose of the embodiment of the present invention first is to provide a kind of channel equalization method, and letter can be improved using the technical scheme
The accuracy of trace equalization, improves data communication effect.
The purpose of the embodiment of the present invention second is to provide a kind of communication equipment, can improve channel using the technical scheme equal
The accuracy of weighing apparatus, improves data communication effect.
The purpose of the embodiment of the present invention the 3rd is to provide another communication equipment, and channel can be improved using the technical scheme
Accuracy, improves data communication effect in a balanced way.
In a first aspect, a kind of channel equalization method provided in an embodiment of the present invention, including：
Receiver receives the information of the index of modulation, and the index of modulation includes：Pilot modulated coefficient and data modulation system
Number；
Receiver receives signal of communication, and the signal of communication includes：Pilot signal and data-signal；
Receiver is obtained according to the pilot signal, known pilot transmission signal that receive and the pilot modulated coefficient
Obtain the initial channel status information of the channel that the signal of communication passes through；
Receiver adjusts the initial channel status information according to the data index of modulation and pilot modulated coefficient,
Obtain each final channel condition information of the channel；
Receiver carries out channel equalization according to each final channel condition information, the data-signal to receiving, and solves
Adjust the transmission signal for recovering to obtain the data-signal.
With reference in a first aspect, under the first implementation, the signal of communication is：Multiple input multiple output communications signal；
Step：According to the pilot signal, known pilot transmission signal that receive and the pilot modulated coefficient, obtain
The initial channel status information of the channel that the signal of communication passes through is obtained, including：
The receiver calculates corresponding first letter of each reception antenna for obtaining the receiver according to following functional expression
The initial channel status information in road, second channel：
Wherein, first channel, second channel are respectively the transmission signal increasing of the corresponding antenna side's figure of the i-th reception antenna
Beneficial B0(θ), transmission signal gain B2(θ) corresponding channel,
The B0(θ)、B2(θ) is mutually orthogonal,
The i is the sequence number of the reception antenna of the receiver,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel state letter of second channel
Breath；
The R0For：The pilot modulated coefficient,
The p1(n)、p2N () is respectively：Known to receiver, the two pilot transmission signal streams that send of emitter；It is described
ri1(n)、ri2N () is respectively：The pilot signal that i-th reception antenna is received in first channel, second channel,
The n is any subcarrier sequence number of the pilot signal, and the N is the subcarrier length of the pilot signal.
With reference in a first aspect, under the first implementation, step：Receiver is according to the data index of modulation and leads
The frequency index of modulation, adjusts the initial channel status information, obtains each final channel condition information of the channel, including：
According to following functional expression, corresponding first channel of i-th reception antenna, the final letter of second channel are obtained
Channel state information
The R1For：The data index of modulation.
With reference in a first aspect, under the first implementation, the pilot modulated coefficient, by emitter according to the transmitting
The hardware configuration information of machine is calculated according to predetermined algorithm and obtained；Or,
The pilot modulated coefficient, by the emitter is according to the hardware configuration information of the emitter and described connects
The currently practical channel estimation status information of receipts machine feedback, calculates according to predetermined algorithm and obtains.
With reference in a first aspect, under the first implementation, the MIMO signal is：OFDM is believed
Number or single-carrier signal.
Second aspect, a kind of communication equipment provided in an embodiment of the present invention, including：Antenna, for sending, receiving signal,
The signal of the reception includes：Receive the information of the outside index of modulation for sending and send signal of communication,
The index of modulation includes：Pilot modulated coefficient and the data index of modulation,
The signal of communication includes：Pilot signal and data-signal；
Memory cell, for storing the pilot modulated coefficient, the data index of modulation, each known pilot signal；
Channel estimating unit, for according to the pilot signal, known pilot transmission signal that receive and the pilot tone
The index of modulation, obtains the initial channel status information of the channel that the signal of communication passes through；
Channel condition information adjustment unit, for according to the data index of modulation and pilot modulated coefficient, adjusting institute
Initial channel status information is stated, each final channel condition information of the channel is obtained；
Channel equalization unit, for according to each final channel condition information, the data-signal to receiving to be carried out
Channel equalization, demodulation recovers to obtain the transmission signal of the data-signal.
With reference to second aspect, under the first implementation, the antenna is at least two,
The channel estimating unit, specifically for according to following functional expression, calculating each reception day for obtaining the receiver
Corresponding first channel of line, the initial channel status information of second channel：
Wherein, first channel, second channel are respectively the transmission signal increasing of the corresponding antenna side's figure of the i-th reception antenna
Beneficial B0(θ), transmission signal gain B2(θ) corresponding channel,
The B0(θ)、B2(θ) is mutually orthogonal,
The i is the sequence number of the reception antenna of the receiver,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel state letter of second channel
Breath；
The R0For：The pilot modulated coefficient,
The p1(n)、p2N () is respectively：Known to receiver, the two pilot transmission signal streams that send of emitter；It is described
ri1(n)、ri2N () is respectively：The pilot signal that i-th reception antenna is received in first channel, second channel,
The n is any subcarrier sequence number of the pilot signal, and the N is the subcarrier length of the pilot signal.
With reference to second aspect, under the first implementation, the channel condition information adjustment unit, specifically for basis
Following functional expression, obtains corresponding first channel of i-th reception antenna, the final channel condition information of second channel
The R1For：The data index of modulation,
The R0It is the pilot modulated coefficient,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel state letter of second channel
Breath.
The third aspect, a kind of communication equipment provided in an embodiment of the present invention, including：
Antenna, for sending, receiving signal, the signal of the reception includes：Receive the letter of the outside index of modulation for sending
Breath and transmission signal of communication,
The index of modulation includes：Pilot modulated coefficient and the data index of modulation,
The signal of communication includes：Pilot signal and data-signal；
Memory, for storing the pilot modulated coefficient, the data index of modulation, each known pilot signal；
Channel estimator, for being adjusted according to the pilot signal, known pilot transmission signal that receive and the pilot tone
Coefficient processed, obtains the initial channel status information of the channel that the signal of communication passes through；
Channel condition information adjuster, for according to the data index of modulation and pilot modulated coefficient, adjustment to be described
Initial channel status information, obtains each final channel condition information of the channel；
Channel equalizer, for according to each final channel condition information, the data-signal to receiving to carry out letter
Trace equalization, demodulation recovers to obtain the transmission signal of the data-signal.
With reference to the first implementation of the third aspect, under the first implementation,
The antenna is at least two,
The channel estimator, specifically for according to following functional expression, calculating each reception antenna for obtaining the receiver
The initial channel status information of corresponding first channel, second channel：
Wherein, first channel, second channel are respectively the transmission signal increasing of the corresponding antenna side's figure of the i-th reception antenna
Beneficial B0(θ), transmission signal gain B2(θ) corresponding channel,
The B0(θ)、B2(θ) is mutually orthogonal,
The i is the sequence number of the reception antenna of the receiver,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel state letter of second channel
Breath；
The R0For：The pilot modulated coefficient,
The p1(n)、p2N () is respectively：Known to receiver, the two pilot transmission signal streams that send of emitter；It is described
ri1(n)、ri2N () is respectively：The pilot signal that i-th reception antenna is received in first channel, second channel,
The n is any subcarrier sequence number of the pilot signal, and the N is the subcarrier length of the pilot signal.
With reference to the first implementation of the third aspect, under the third implementation, the channel condition information adjustment
Device, specifically for according to following functional expression, obtaining corresponding first channel of i-th reception antenna, second channel most
Whole channel condition information
The R1For：The data index of modulation,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel state letter of second channel
Breath.
Therefore, using the present embodiment technical scheme, because receiver is being received comprising pilot signal in the present embodiment
And the corresponding pilot modulated coefficient of the pilot signal and data-signal correspondence are also received before the signal of communication of data-signal
The data index of modulation, therefore can be with specific reference to pilot modulated coefficient according to the pilot signal for receiving when channel estimation is carried out
And the corresponding known pilot transmission signal of the pilot signal carries out channel estimation to the channel that signal of communication passes through, channel is obtained
CSI, be designated as initial CSI, after the initial CSI for obtaining channel according to pilot signal, adjusted yet further still according to the pilot tone that receives
Coefficient processed, the data index of modulation are adjusted to initial CSI, with the final CSI after being adjusted, lead in the present embodiment with being eliminated
Pilot modulated coefficient is different from the data index of modulation in letter signal and extra demodulation mistake that brought to the trace equalization of data-signal
Difference.
As fully visible, relative to same modulation intrinsic in the prior art pilot signal, the limitation of data-signal.Using
The present embodiment technical scheme be conducive to break through pilot signal, data-signal must using same modulation inherent limitations so that lead
The modulation of frequency signal modulation and data-signal can respectively according to pilot signal and the respective modulation of data-signal, demodulation with
And transmission requirement is performed, and the pilot modulated coefficient and data modulation that can in advance be transmitted according to emitter in receiving terminal are
Number is eliminated due to the modulation of the pilot signal in signal of communication, the pilot modulated coefficient of data-signal and data in channel estimation
Coefficient is inconsistent and extra error that brought to the channel equalization of data-signal, it is ensured that the channel equalization of data-signal it is accurate
Degree.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is the channel equalization method schematic flow sheet of the multiple input multiple output communications that the embodiment of the present invention 1 is provided；
Fig. 2 is the structural representation of the Single RF antennas that the embodiment of the present invention 2 is provided；
Fig. 3 is the gain B of the transmission signal in the Single RF antennas that the embodiment of the present invention 2 is provided0(θ)、B1(θ)、B2
The amplitude information schematic diagram of (θ)；
Fig. 4 is the channel equalization method schematic flow sheet of the multiple input multiple output communications that the embodiment of the present invention 2 is provided；
Fig. 5 is the communication apparatus construction schematic diagram that the embodiment of the present invention 3 is provided；
Fig. 6 is the communication apparatus construction schematic diagram that the embodiment of the present invention 4 is provided；
Fig. 7 is the communication apparatus construction schematic diagram that the embodiment of the present invention 5 is provided；
Fig. 8 is the communication apparatus construction schematic diagram that the embodiment of the present invention 6 is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1：
It is shown in Figure 1, present embodiments provide a kind of channel equalization method of multiple input multiple output communications, the method master
To include following flow：
Step 101：Receiver receives modulation coefficient information.
In the present embodiment, emitter is first before signal of communication of the transmitting comprising business datum signal and pilot signal
To first be sent to the receiver of opposite end in the corresponding modulation coefficient information of communication to be sent, so that receiver is receiving communication letter
The corresponding modulation coefficient information of the signal of communication is first received before number.
The index of modulation includes：Pilot modulated coefficient and the data index of modulation.Wherein pilot modulated coefficient is emitter
The index of modulation used during pilot signal in modulation communication signal, the data index of modulation is emitter in modulation communication signal
In data-signal when the index of modulation that uses.
In this embodiment, when the modulation of signal of communication is carried out, the modulation methods of the pilot signal before data-signal with
The modulation system of data-signal is separate, and without carrying out signal tune according to identical modulation system, the identical index of modulation
System.
For example：Pilot signal in the signal of communication of the present embodiment can be, but not limited to biphase phase shift keying (Binary
Phase Shift Keying, abbreviation BPSK) modulation, its index of modulation is R0, and data-signal uses phase quadrature amplitude modulation
(Quadrature Amplitude Modulation, abbreviation QAM), its index of modulation is R1.
Step 102：Receiver receives signal of communication.
Emitter communicates this after the current corresponding modulation coefficient information of signal of communication to be sent is sent to receiver
Signal sends.
In receiver end, receiver receives the signal of communication, and the signal of communication frame includes pilot signal and pilot tone letter
Data-signal after number, frame structure is as follows：
| Pilot signal | Data-signal |
Step 103：Receiver is led to according to the pilot signal, known pilot signal and pilot modulated coefficient that receive
The initial channel status information of each channel that letter signal passes through.
After receiver receives signal of communication, the pilot signal, the pilot signal in the signal of communication for receiving are corresponding
Known pilot transmission signal and pilot coefficients, channel estimation is carried out to the channel that this signal of communication passes through, and obtains the channel
Initial channel status information (Channel State Information, abbreviation CSI).
Step 104：Receiver adjusts each initial letter of each channel according to the data index of modulation and pilot modulated coefficient
Channel state information, obtains each final channel condition information of each channel that messenger passes through.
Pilot signal of the receiver in signal of communication, after carrying out the initial CSI of channel estimation acquisition, in this step also
The initial CSI of channel is further adjusted according to pilot modulated coefficient and the data index of modulation, to eliminate due to pilot modulated system
The additional deviation that number, the data index of modulation are different and are brought to channel equalization.And in this step, also adjusted further with data
Coefficient processed and pilot modulated coefficient are adjusted to initial CSI, the final CSI after being adjusted, to utilize final CSI pairs
Data-signal carries out channel equalization.
Step 105：Receiver carries out channel equalization to data-signal according to final channel condition information, and demodulation recovers number
It is believed that number transmission signal.
Final CSI after receiver application adjustment, channel equalization is carried out to the data-signal in signal of communication, and demodulation is obtained
The transmission signal of the data-signal.
Specific channel equalization method can be, but not limited to referring to any channel equalization technique scheme of prior art.
Therefore, using the present embodiment technical scheme, because receiver is being received comprising pilot signal in the present embodiment
And the corresponding pilot modulated coefficient of the pilot signal and data-signal correspondence are also received before the signal of communication of data-signal
The data index of modulation, therefore can be with specific reference to pilot modulated coefficient according to the pilot signal for receiving when channel estimation is carried out
And the corresponding known pilot transmission signal of the pilot signal carries out channel estimation to the channel that signal of communication passes through, channel is obtained
CSI, be designated as initial CSI, after the initial CSI for obtaining channel according to pilot signal, adjusted yet further still according to the pilot tone that receives
Coefficient processed, the data index of modulation are adjusted to initial CSI, with the final CSI after being adjusted, lead in the present embodiment with being eliminated
Pilot modulated coefficient is different from the data index of modulation in letter signal and extra demodulation mistake that brought to the trace equalization of data-signal
Difference.
As fully visible, relative to same modulation intrinsic in the prior art pilot signal, the limitation of data-signal.Using
The present embodiment technical scheme be conducive to break through pilot signal, data-signal must using same modulation inherent limitations so that lead
The modulation of frequency signal modulation and data-signal can respectively according to pilot signal and the respective modulation of data-signal, demodulation with
And transmission requirement is performed, and the pilot modulated coefficient and data modulation that can in advance be transmitted according to emitter in receiving terminal are
Number is eliminated due to the modulation of the pilot signal in signal of communication, the pilot modulated coefficient of data-signal and data in channel estimation
Coefficient is inconsistent and extra error that brought to the channel equalization of data-signal, it is ensured that the channel equalization of data-signal it is accurate
Degree.
Embodiment 2：
The present embodiment with how the MIMO signal sent to MIMO (Single RF MIMO) emitter of single radio-frequency channel
Received and as a example by the MIMO signal to receiving carries out channel equalization, technical solution of the present invention is carried out it is further in detail point
Analysis.
Only possesses a radio frequency link passage in the emitter of Single RF MIMO.In Single RF MIMO networks,
Structure such as Fig. 2 of its Single RF antenna shows.
Seen by Fig. 2, an antenna entity 201 is provided only with the communication equipment of Single RF MIMO, also known as antenna excitation
A period of time 201 (active element), the antenna excitation a period of time 201 can be come from by radio frequency link with sending signal and reception
S0 in the signal of base band, such as figure；
Two parasitic a period of time 202 (Parasitic Element) are symmetrically arranged with the side in antenna excitation a period of time 201.
Each parasitic a period of time 202 is without radio frequency link, it is impossible to enough directly transmits and receives signal, and pass through the reactance of regulation itself
(Reactance) pattern of sending signal is adjusted.Spacing between each parasitic a period of time 202 and excitation a period of time 201 is fixed as d：Wherein, θ is the angle between incoming signal and aerial array.Control circuit is provided with before each parasitic a period of time 202
203, with used adjustment control circuit 203, and input signal s can be adjusted0, s1And the reactance in realization parasitic a period of time 202, so that
Adjust and data is activation is realized by the coupling between each parasitic a period of time 202 and excitation a period of time 201.In Single RF MIMO systems
The data flow transmitted in system is mainly two paths of data stream, and a data flow is transmitted by above-mentioned radio frequency link；Another data flow passes through
Realization is coupled between parasitic a period of time 202 and excitation a period of time 201.
For the ingle RF antenna structures shown in Fig. 2, shooting angle is designated as G (θ) for the far-field signal of θ, and it can be with table
It is shown as：
Wherein,
Wherein, ZsIt is the source impedance (source impedance) in parasitic a period of time 202, xL1, xL2It is located in respectively Fig. 2
The controllable impedance in the parasitic a period of time 202 beside excitation a period of time 201, j represents imaginary number；
Wherein ZiiIt is the self-impedance in any excitation a period of time 201 or parasitism a period of time 202,
ZijIt is the mutual impedance between excitation a period of time 201 or parasitic a period of time 202, i, j=0,1,2.After the structure determination of aerial array, z
Value can according to circuit theory according to prior art obtain；
λ is wavelength；υsIt is representative antennas gain, its value can be adjusted by the amplifier of radio frequency link.
Functional expression formula (1) is further spread out and can obtained：
In superior function formula (2), the gain B of transmission signal0(θ)、B1(θ)、B2The amplitude information of (θ) is as shown in figure 3, wherein
As seen from Figure 3, it can be seen that B0(θ) and B1(θ) is basically identical, by calculating B0(θ) and B1Between (θ)
Energy distribution can obtain：
Wherein c=0.9612,
Can be obtained with calculating from figure in addition, B2(θ) and B0(θ) and B1(θ) is orthogonal respectively.
Functional expression (3) is substituted into functional expression (2) can obtain functional expression (4)：
By functional expression (4), it is seen that, we can be by adjusting υs, make xL1、xL2Meet following condition：
Wherein, R0It is the index of modulation, the index of modulation is mutually orthogonal in transmission signal for making up in channel equalization
Two gain B0(θ) and B2The imbalance of power between (θ), R is taken under ideal communication channel0=3.71.And carry out channel tune in transmitting terminal
When processed, index of modulation R0Value also determined by the hardware of emitter, and the index of modulation that can be realized in transmitting terminal value
It is generally not successive value.
By above description as can be seen that in the Single RF MIMO communication networks of the present embodiment, believing due to launching
Number gain B0(θ) and B2(θ), therefore the transmission signal s in functional expression (4)0、s1Can regard as by mutually orthogonal channel
Receiver is reached, so as in receiving terminal reception processing can be carried out by the way of tradition MIMO.It is said differently, that is, exists
In Single RF MIMO communication networks, can be by B0(θ)、B2(θ) regards two virtual transmitting antennas, every transmitting as respectively
The data sent on antenna are respectively s0And s1.Correspondingly, it is respectively received data s in receiving terminal any antenna0And s1。
Enter to advance as a example by realizing channel equalization technique scheme of the invention in Single RF MIMO communication networks below
The explanation of one step：
Emitter according to the measurement of own hardware (can with but be not limited to combine channel current between receiver
CSI), the pilot modulated coefficient that should be used when obtaining modulated pilots signal, is designated as R0, obtain what should be used during modulated data signal
The data index of modulation, is designated as R1.Emitter sends modulation coefficient information to receiver, the pilot modulated system for notifying receiving terminal current
Number and the data index of modulation.Emitter can be, but not limited to use signaling to the mode that receiver sends the modulation coefficient information
Or the mode for notifying sends.
Emitter utilizes pilot modulated coefficients R0And data index of modulation R1, carry out signal modulation.The frame that modulation is obtained
Structure is as follows：
| Pilot signal P (n) | Data-signal |
In the present embodiment the data length N of pilot signal, the data length M of data-signal length can be as needed
Set.For example, can be, but not limited to compatible with long term evolution (Long Term Evolution, abbreviation LTE) framework, N is set to
144, M is set to 4048.
When coding is modulated to pilot signal, pilot signal can be, but not limited to use and uses quaternary phase shift emitter
Keying signal (Quadrature Phase Shift Keying, abbreviation QPSK) or binary phase shift keying (Binary
Phase Shift Keying, abbreviation BPSK) signal modulation is carried out, to ensure to carry out the accurate of channel estimation according to pilot signal
Property.
Emitter is according to the business demand of current data signal and the modulation system of network requirement selection determination to data
Signal is modulated, and its modulation system can be, but not limited to be modulated for QPSK or BPSK, and its order of modulation can be, but not limited to
Higher than the order of modulation of pilot signal.
According to functional expression (4), the pilot tone p in the Single RF MIMO network systems of the present embodiment1(n) and p2(n)
Construction it is as follows：
Wherein B0(θ) and B2(θ) is the transmitting gain of two orthogonal channels in orthogonal antenna radiation pattern, and p (n) is pseudorandom
Sequence, can be used for channel estimation and synchronization.B0(θ), B2(θ) and R0Respectively according to the reactance value xL being generated in advance1, xL2It is raw
Into.
Shown in Figure 4, in receiver end, the handling process of receiver mainly comprises the following steps：
Step 401：Receiver receives modulation coefficient information.
Step 101 in this step and embodiment 1 is similarly.
Step 402：Receiver receives MIMO signal.
The present embodiment so that receiver has 2 antennas (first antenna, the second antenna) as an example, for more than more than 2
Antenna receiver MIMO signal reception situation be similar to.
For first antenna, the transmission signal gain B of the corresponding antenna side's figure of first antenna0(θ) and B2The channel of (θ) point
Wei not h11And h12, first antenna is by channel h11And channel h12The two-way pilot signal stream for receiving respectively can be represented respectively
It is functional expression (5)：
Wherein, p1(n)、p2N () is respectively：Known to receiver, the two pilot transmission signal streams that send of emitter, R0
It is pilot modulated coefficient, n is pilot frequency sequence sequence number, the h in above formula11、h12Respectively channel h11、h12CSI.
Similarly, the transmission signal gain B of the corresponding antenna side's figure of the second antenna0(θ) and B2The channel of (θ) is respectively h21、
h22, first antenna is by channel h21And channel h22The two-way pilot signal stream for receiving respectively can be expressed as functional expression respectively
(5’)：
Step 403：Receiver is obtained according to the pilot signal, known pilot signal and pilot modulated coefficient that receive
The initial channel status information of each channel that MIMO signal is passed through.
For the first antenna of receiver, time domain correlation is carried out to functional expression (5), obtain functional expression (6)：
Channel h is obtained according to functional expression (6)11、h12CSI estimatesSee following functional expression：
For the second antenna of receiver, time domain correlation is carried out to functional expression (5 '), obtain functional expression (6 ')：
Channel h is obtained according to functional expression (6 ')21、h22CSI estimatesSee following functional expression：
So far, the pilot signal for being received using each antenna of receiver obtains the corresponding antenna side's figure B of each antenna respectively0
(θ) and B2The initial CSI of the channel of (θ).
Step 404：Receiver adjusts each initial letter of each channel according to the data index of modulation and pilot modulated coefficient
Channel state information, obtains each final channel condition information of each channel that MIMO signal is passed through.
In the present embodiment, the limitation due to Single RF MIMO frameworks in itself, in pilot signal and data-signal
Index of modulation during modulation is differed, and in receiver side, receiver utilizes the first pilot transmission signal p1(n) and the second pilot tone
Transmission signal p2N each channel h that () obtains11、h12、h21、h22Initial CSI after, in this step further to each channel h11、
h12、h21、h22Initial CSI be adjusted, with specific reference to following functional expression (7) adjustment, obtain channel h11、h12、h21、h22Most
Whole CSI： And
Step 405：Receiver carries out channel equalization to data-signal according to final channel condition information, and demodulation recovers number
It is believed that number transmission signal.
Obtain each channel it is adjusted after final CSI after, according to the CSI of each channel, letter is carried out to data-signal
Trace equalization, demodulation recovers the transmission signal of data-signal.This step can be, but not limited to be performed using prior art.
Therefore, using the present embodiment technical scheme, in addition to the beneficial effect in possessing embodiment 1, also especially fit
For in Single RF MIMO radio architectures, it is ensured that due to Single RF MIMO in Single RF MIMO radio architectures
The intrinsic hardware limitations of radio architectures, and pilot modulated coefficient and the inconsistent situation of the data index of modulation, eliminate due to MIMO
The extra error that pilot modulated coefficient, the inconsistent channel equalization to data-signal of the data index of modulation are brought in signal, it is ensured that
The accuracy of the channel equalization under the situation, due to promoting the application of Single RF MIMO radio architectures, improves communication efficiency.
It should be noted that the MIMO signal in the present embodiment technical scheme can be, but not limited to be single-carrier signal,
Can be multi-carrier signal, for example OFDM (Orthogonal Frequency Division Multiplexing,
Abbreviation OFDM) signal etc..The technical scheme that it estimates according to the CSI that pilot signal carries out each channel and CSI is adjusted is same with upper
Reason.
Embodiment 3：
It is shown in Figure 5, a kind of communication equipment is present embodiments provided, the communication equipment mainly includes with lower component：My god
Line 501, memory cell 502, channel estimating unit 503, channel condition information adjustment unit 504 and channel equalization unit 505.
The annexation and operation principle of each several part are as follows：
Antenna 501, as the radio-frequency unit of this communication equipment, for sending, receiving signal.
In the present embodiment, this communication equipment is included by the signal that antenna 501 is received：Receiver/transmitter is included in transmission
The modulation coefficient information of this communication equipment is sent to before pilot signal and data-signal, wherein modulation coefficient information includes：
Pilot modulated coefficient and the data index of modulation.Antenna 501 when modulation coefficient information is received, by pilot modulated coefficient and
The data index of modulation is stored to memory cell 502.
This communication equipment also includes as the communication information number of receiving terminal its antenna 501 reception：Comprising pilot signal and
The signal of communication of data-signal, wherein pilot signal, the corresponding pilot modulated coefficient of data-signal, the data index of modulation can with but
It is not limited to different.
Memory cell 502 is used for data storage, and the data of its storage include：In the signal of communication that this receiver will be received
Pilot signal and data-signal pilot modulated coefficient, the data index of modulation and the signal of communication that will be received respectively
In pilot signal pilot transmission signal.
Channel estimating unit 503, is connected with antenna 501, believes comprising pilot signal and data for being received in antenna 501
Number signal of communication after, according to the pilot modulated coefficient, pilot transmission signal that are stored in memory cell 502 and be currently received
Pilot signal, channel estimation is carried out to the Xinda that signal passes through, and obtains the initial CSI of each channel.Further principles can with but
It is not limited to the record referring to step 103, step 403 in embodiment 1,2.
Channel condition information adjustment unit 504, electrically connects with channel estimating unit 503, in channel estimating unit 503
After obtaining the initial CSI of each channel, according to the pilot modulated coefficient and the data index of modulation that are stored in memory cell 502, adjust
The CSI of whole each channel, obtains the final CSI of each channel, and the final CSI of each channel is input into channel equalization unit 505.
Channel equalization unit 505, is electrically connected, for root with antenna 501 and channel condition information adjustment unit 504
According to the final CSI of each channel, the data-signal in the signal of communication received to current antenna 501 carries out channel equalization, demodulates extensive
The transmission signal of data-signal is obtained again.
Therefore, using the present embodiment technical scheme, because communication equipment is being received comprising pilot tone letter in the present embodiment
Number and the signal of communication of data-signal before also receive the corresponding pilot modulated coefficient of the pilot signal and data-signal pair
The data index of modulation answered, and pilot modulated coefficient and the data index of modulation are pre-stored in memory cell 502, therefore in channel
Estimation unit 503 when carrying out channel estimation can with specific reference to pilot modulated coefficient according to the pilot signal for receiving and this lead
The corresponding known pilot transmission signal of frequency signal carries out channel estimation to the channel that signal of communication passes through, and obtains the CSI of channel, note
It is initial CSI, after the initial CSI that channel estimating unit 503 obtains channel according to pilot signal, then by channel condition information
Adjustment unit 504 is adjusted yet further still according to the pilot modulated coefficient, the data index of modulation for receiving to initial CSI, to obtain
Final CSI after must adjusting, with eliminate in the present embodiment pilot modulated coefficient in signal of communication it is different from the data index of modulation and
To the extra demodulating error that the trace equalization of data-signal is brought.
As fully visible, relative to same modulation intrinsic in the prior art pilot signal, the limitation of data-signal.Using
The present embodiment technical scheme can break through pilot signal, data-signal must be using the inherent limitations of same modulation so that transmitting terminal
Can respectively according to pilot signal and the respective modulation of data-signal, solution to pilot signal modulation and the modulation of data-signal
Adjust and transmission requirement is performed, and the pilot modulated coefficient and number that can be in advance transmitted according to emitter in this communication equipment
Eliminated in channel estimation according to the index of modulation due to the pilot signal in signal of communication, the pilot modulated coefficient of data-signal and
The data index of modulation is inconsistent and extra error that brought to the channel equalization of data-signal, it is ensured that the channel equalization of data-signal
Accuracy.
Embodiment 4：
Shown in Figure 6, the present embodiment provides a kind of communication equipment, and 3 differences of the communication equipment and implementation are main
It is：
At least two antennas 601 are provided with the communication equipment of the present embodiment, the present embodiment communication equipment is multi input
Multi output communication equipment.
Used as being described in further detail for embodiment 1, the channel estimating unit 603 in the communication equipment of the present embodiment has
Body is used to, according to following functional expression, calculate corresponding first channel of each reception antenna 601, the second channel for obtaining the receiver
Initial channel status information：
Wherein, the first channel, second channel are respectively the transmission signal increasing of the corresponding side's figure of antenna 601 of the i-th reception antenna
Beneficial B0(θ), transmission signal gain B2(θ) corresponding channel,
The B0(θ)、B2(θ) is mutually orthogonal,
The i is the sequence number of the reception antenna 601 of the receiver,
It is describedRespectively：First channel of the i-th reception antenna 601, the initial channel state of second channel
Information,
The R0For：The pilot modulated coefficient,
The ri1(n)、ri2N () is respectively：I-th reception antenna 601 is received in first channel, second channel
The pilot signal, the n is any subcarrier sequence number of the pilot signal, and the N is the son load of the pilot signal
Wavelength degree.
As being described in further detail for embodiment 1, the channel condition information adjustment in the communication equipment of the present embodiment
Unit 604, specifically for according to following functional expression, obtaining corresponding first channel of i-th reception antenna 601, second
The final channel condition information of channel
Wherein R1For：The data index of modulation.
Therefore, using the present embodiment technical scheme, its in addition to possessing the beneficial effect described in embodiment 3, this reality
The communication equipment for applying example is also further particularly well-suited to MIMO communication networks, is particularly well-suited to reception and comes from Single RF
The MIMO signal of MIMO radio architectures, it is ensured that due to Single RF MIMO radio frequency framves in Single RF MIMO radio architectures
The intrinsic hardware limitations of structure, and pilot modulated coefficient and the inconsistent situation of the data index of modulation, eliminate due in MIMO signal
The extra error that pilot modulated coefficient, the inconsistent channel equalization to data-signal of the data index of modulation are brought, it is ensured that the situation
Under channel equalization accuracy, due to promote Single RF MIMO radio architectures application, improve communication efficiency.
Embodiment 5：
It is shown in Figure 7, a kind of communication equipment is present embodiments provided, the communication equipment mainly includes with lower component：My god
Line 501, memory 702, channel estimator 703, channel condition information adjuster 704 and channel equalizer 705.Each several part
Annexation and operation principle are as follows：
Antenna 501, as the radio-frequency unit of this communication equipment, for sending, receiving signal.
In the present embodiment, this communication equipment is included by the signal that antenna 501 is received：Receiver/transmitter is included in transmission
The modulation coefficient information of this communication equipment is sent to before pilot signal and data-signal, wherein modulation coefficient information includes：
Pilot modulated coefficient and the data index of modulation.Antenna 501 when modulation coefficient information is received, by pilot modulated coefficient and
The data index of modulation is stored to memory 702.
This communication equipment also includes as the communication information number of receiving terminal its antenna 501 reception：Comprising pilot signal and
The signal of communication of data-signal, wherein pilot signal, the corresponding pilot modulated coefficient of data-signal, the data index of modulation can with but
It is not limited to different.
Memory 702 is used for data storage, and the data of its storage include：In the signal of communication that this receiver will be received
Pilot signal and data-signal are respectively in pilot modulated coefficient, the data index of modulation and the signal of communication that will be received
Pilot signal pilot transmission signal.
Channel estimator 703, is connected with antenna 501, for being received comprising pilot signal and data-signal in antenna 501
Signal of communication after, according to the pilot modulated coefficient, pilot transmission signal that are stored in memory 702 and the pilot tone that is currently received
Signal, channel estimation is carried out to the Xinda that signal passes through, and obtains the initial CSI of each channel.Further principles can with but do not limit
The record of step 103, step 403 in referring to embodiment 1,2.
Channel condition information adjuster 704, electrically connects with channel estimator 703, for being obtained respectively in channel estimator 703
After the initial CSI of channel, according to the pilot modulated coefficient and the data index of modulation that are stored in memory 702, each channel is adjusted
CSI, obtain the final CSI of each channel, the final CSI of each channel is input into channel equalizer 705.
Channel equalizer 705, is electrically connected with antenna 501 and channel condition information adjuster 704, for according to each
The final CSI of channel, the data-signal in the signal of communication received to current antenna 501 carries out channel equalization, and demodulation recovery is obtained
Obtain the transmission signal of data-signal.
Therefore, using the present embodiment technical scheme, because communication equipment is being received comprising pilot tone letter in the present embodiment
Number and the signal of communication of data-signal before also receive the corresponding pilot modulated coefficient of the pilot signal and data-signal pair
The data index of modulation answered, and pilot modulated coefficient and the data index of modulation are pre-stored in memory 702, therefore estimate in channel
Gauge 703 can be believed with specific reference to pilot modulated coefficient when carrying out channel estimation according to the pilot signal for receiving and the pilot tone
Number corresponding known pilot transmission signal carries out channel estimation to the channel that signal of communication passes through, and obtains the CSI of channel, is designated as just
Beginning CSI, after the initial CSI that channel estimator 703 obtains channel according to pilot signal, then by channel condition information adjuster
704 are adjusted yet further still according to the pilot modulated coefficient, the data index of modulation for receiving to initial CSI, after being adjusted
Final CSI, it is different from the data index of modulation and believe to data to eliminate in the present embodiment pilot modulated coefficient in signal of communication
Number the extra demodulating error that brings of trace equalization.
As fully visible, relative to same modulation intrinsic in the prior art pilot signal, the limitation of data-signal.Using
The present embodiment technical scheme can break through pilot signal, data-signal must be using the inherent limitations of same modulation so that transmitting terminal
Can respectively according to pilot signal and the respective modulation of data-signal, solution to pilot signal modulation and the modulation of data-signal
Adjust and transmission requirement is performed, and the pilot modulated coefficient and number that can be in advance transmitted according to emitter in this communication equipment
Eliminated in channel estimation according to the index of modulation due to the pilot signal in signal of communication, the pilot modulated coefficient of data-signal and
The data index of modulation is inconsistent and extra error that brought to the channel equalization of data-signal, it is ensured that the channel equalization of data-signal
Accuracy.
Embodiment 6：
Shown in Figure 8, the present embodiment provides a kind of communication equipment, and 5 differences of the communication equipment and implementation are main
It is：
At least two antennas 601 are provided with the communication equipment of the present embodiment, the present embodiment communication equipment is multi input
Multi output communication equipment.
Used as being described in further detail for embodiment 1, the channel estimator 803 in the communication equipment of the present embodiment is specific
Corresponding first channel of each reception antenna 601 of the receiver, second channel are obtained for according to following functional expression, calculating
Initial channel status information：
Wherein, the first channel, second channel are respectively the transmission signal gain B of the corresponding side's figure of antenna 601 of the i-th reception0
(θ), transmission signal gain B2(θ) corresponding channel,
The B0(θ)、B2(θ) is mutually orthogonal,
The i is the sequence number of the reception antenna 601 of the receiver,
It is describedRespectively：First channel of the i-th reception antenna 601, the initial channel state of second channel
Information,
The R0For：The pilot modulated coefficient,
The ri1(n)、ri2N () is respectively：I-th reception antenna 601 is received in first channel, second channel
The pilot signal, the n is any subcarrier sequence number of the pilot signal, and the N is the son load of the pilot signal
Wavelength degree.
As being described in further detail for embodiment 1, the channel condition information adjustment in the communication equipment of the present embodiment
Device 804, specifically for according to following functional expression, obtaining corresponding first channel of i-th reception antenna 601, the second letter
The final channel condition information in road
Wherein R1For：The data index of modulation.
Therefore, using the present embodiment technical scheme, its in addition to possessing the beneficial effect described in embodiment 3, this reality
The communication equipment for applying example is also further particularly well-suited to MIMO communication networks, is particularly well-suited to reception and comes from Single RF
The MIMO signal of MIMO radio architectures, it is ensured that due to Single RF MIMO radio frequency framves in Single RF MIMO radio architectures
The intrinsic hardware limitations of structure, and pilot modulated coefficient and the inconsistent situation of the data index of modulation, eliminate due in MIMO signal
The extra error that pilot modulated coefficient, the inconsistent channel equalization to data-signal of the data index of modulation are brought, it is ensured that the situation
Under channel equalization accuracy, due to promote Single RF MIMO radio architectures application, improve communication efficiency.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, the part shown as unit can be or may not be physics list
Unit, you can with positioned at a place, or can also be distributed on multiple NEs.It can according to the actual needs be selected
In some or all of module realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each implementation method can
Realized by the mode of software plus required general hardware platform, naturally it is also possible to by hardware.Based on such understanding, on
Stating the part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, should
Computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD, including some fingers
Order is used to so that a computer equipment (can be personal computer, server, or network equipment etc.) performs each implementation
Method described in some parts of example or embodiment.
Embodiments described above, does not constitute the restriction to the technical scheme protection domain.It is any in above-mentioned implementation
Modification, equivalent and improvement made within the spirit and principle of mode etc., should be included in the protection model of the technical scheme
Within enclosing.
Claims (6)
1. a kind of channel equalization method, it is characterised in that including：
Receiver receives the information of the index of modulation, and the index of modulation includes：Pilot modulated coefficient and the data index of modulation；
Receiver receives signal of communication, and the signal of communication includes：Pilot signal and data-signal；
Receiver obtains institute according to the pilot signal, known pilot transmission signal that receive and the pilot modulated coefficient
State the initial channel status information of the channel of signal of communication process；
Receiver adjusts the initial channel status information according to the data index of modulation and pilot modulated coefficient, obtains
Each final channel condition information of the channel；
Receiver carries out channel equalization according to each final channel condition information, the data-signal to receiving, and demodulates extensive
The transmission signal of the data-signal is obtained again；
The signal of communication is：Multiple input multiple output communications signal；
Step：According to the pilot signal, known pilot transmission signal that receive and the pilot modulated coefficient, institute is obtained
The initial channel status information of the channel of signal of communication process is stated, including：
The receiver calculates corresponding first channel of each reception antenna, for obtaining the receiver according to following functional expression
The initial channel status information of two channels：
Wherein, first channel, second channel are respectively the transmission signal gain B of the corresponding antenna side's figure of the i-th reception antenna0
(θ), transmission signal gain B2(θ) corresponding channel,
The B0(θ)、B2(θ) is mutually orthogonal,
The i is the sequence number of the reception antenna of the receiver,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel status information of second channel；
The R0For：The pilot modulated coefficient,
The p1(n)、p2N () is respectively：Known to receiver, the two pilot transmission signal streams that send of emitter；The ri1
(n)、ri2N () is respectively：The pilot signal that i-th reception antenna is received in first channel, second channel, it is described
N is any subcarrier sequence number of the pilot signal, and the N is the subcarrier length of the pilot signal.
2. channel equalization method according to claim 1, it is characterised in that
Step：Receiver adjusts the initial channel status information according to the data index of modulation and pilot modulated coefficient,
Each final channel condition information of the channel is obtained, including：
According to following functional expression, corresponding first channel of i-th reception antenna, the final channel shape of second channel are obtained
State information
The R1For：The data index of modulation.
3. channel equalization method according to claim 1, it is characterised in that
The pilot modulated coefficient, is calculated according to predetermined algorithm according to the hardware configuration information of the emitter by emitter and obtained
；Or,
The pilot modulated coefficient, by the emitter according to the hardware configuration information and the receiver of the emitter
The currently practical channel estimation status information of feedback, calculates according to predetermined algorithm and obtains.
4. channel equalization method according to claim 1, it is characterised in that
The MIMO signal is：Orthogonal frequency-division multiplex singal or single-carrier signal.
5. a kind of communication equipment, it is characterized in that, including：
Antenna, for sending, receiving signal, the signal of the reception includes：Receive the information of the outside index of modulation for sending with
And transmission signal of communication,
The index of modulation includes：Pilot modulated coefficient and the data index of modulation,
The signal of communication includes：Pilot signal and data-signal；
Memory, for storing the pilot modulated coefficient, the data index of modulation, each known pilot signal；
Channel estimator, for according to the pilot signal, known pilot transmission signal that receive and the pilot modulated system
Number, obtains the initial channel status information of the channel that the signal of communication passes through；
Channel condition information adjuster, it is described initial for according to the data index of modulation and pilot modulated coefficient, adjusting
Channel condition information, obtains each final channel condition information of the channel；
Channel equalizer, for according to each final channel condition information, it is equal that the data-signal to receiving carries out channel
Weighing apparatus, demodulation recovers to obtain the transmission signal of the data-signal；
The antenna is at least two,
The channel estimator, specifically for according to following functional expression, calculating each reception antenna correspondence for obtaining the receiver
The first channel, the initial channel status information of second channel：
Wherein, first channel, second channel are respectively the transmission signal gain B of the corresponding antenna side's figure of the i-th reception antenna0
(θ), transmission signal gain B2(θ) corresponding channel,
The B0(θ)、B2(θ) is mutually orthogonal,
The i is the sequence number of the reception antenna of the receiver,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel status information of second channel；
The R0For：The pilot modulated coefficient,
The p1(n)、p2N () is respectively：Known to receiver, the two pilot transmission signal streams that send of emitter；The ri1
(n)、ri2N () is respectively：The pilot signal that i-th reception antenna is received in first channel, second channel, it is described
N is any subcarrier sequence number of the pilot signal, and the N is the subcarrier length of the pilot signal.
6. communication equipment according to claim 5, it is characterised in that
The channel condition information adjuster, specifically for according to following functional expression, obtaining the corresponding institute of i-th reception antenna
State the final channel condition information of the first channel, second channel
The R1For：The data index of modulation,
It is describedRespectively：First channel of the i-th reception antenna, the initial channel status information of second channel.
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| CN105162265A (en) * | 2015-09-15 | 2015-12-16 | 华南理工大学 | Multi-antenna receiving-based radio electromagnetic wave energy collection device and method |
| CN107181068A (en) * | 2017-04-17 | 2017-09-19 | 广东通宇通讯股份有限公司 | High-frequency ultra-wideband dual polarization all-wave radiating element |
| CN112598106B (en) * | 2020-12-17 | 2024-03-15 | 苏州大学 | Complex channel equalizer design method based on complex-valued forward neural network |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222470A (en) * | 2008-01-31 | 2008-07-16 | 上海交通大学 | Channel estimation method for double-antenna generalized multi-carrier system |
| CN101471749A (en) * | 2007-12-28 | 2009-07-01 | 三星电子株式会社 | Method for generating log-likelihood ratio for QAM-OFDM modulating signal |
| CN101542991A (en) * | 2006-07-12 | 2009-09-23 | 法国电信公司 | Methods for transmitting and receiving a multicarrier signal, carrying out a channel estimation, and corresponding devices and computer program products |
| CN101662438A (en) * | 2008-08-28 | 2010-03-03 | 华为技术有限公司 | Wireless communication method, sending method, receiving and decoding method and device |
| CN102014088A (en) * | 2010-11-24 | 2011-04-13 | 信源通科技（西安）有限公司 | Method for assisting channel equalization by using automatic gain control (AGC) adjustment factors |
| CN102379098A (en) * | 2009-03-31 | 2012-03-14 | 高通股份有限公司 | Methods and apparatus for generation and use of reference signals in a communications system |
| CN102546512A (en) * | 2005-08-24 | 2012-07-04 | 松下电器产业株式会社 | OFDM transmitting device and OFDM receiving device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100442877B1 (en) * | 2002-06-15 | 2004-08-06 | 삼성전자주식회사 | Channel Equalizing and Carrier Recovery System for HomePNA receiver, and Method there-of |
| JP4438482B2 (en) * | 2004-04-05 | 2010-03-24 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | Reception quality estimation method and apparatus |
| US8284862B2 (en) * | 2010-06-30 | 2012-10-09 | Mitsubishi Electric Research Laboratories, Inc. | Method for encoding data symbols with implicitly embedded pilot symbols in resource blocks for wireless networks |
| CN202395807U (en) * | 2011-11-22 | 2012-08-22 | 河南科技大学 | Channel estimation device for generalized multi-carrier system in frequency domain |
-
2013
- 2013-01-23 CN CN201310025014.4A patent/CN103944842B/en active Active
- 2013-09-17 WO PCT/CN2013/083684 patent/WO2014114102A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102546512A (en) * | 2005-08-24 | 2012-07-04 | 松下电器产业株式会社 | OFDM transmitting device and OFDM receiving device |
| CN101542991A (en) * | 2006-07-12 | 2009-09-23 | 法国电信公司 | Methods for transmitting and receiving a multicarrier signal, carrying out a channel estimation, and corresponding devices and computer program products |
| CN101471749A (en) * | 2007-12-28 | 2009-07-01 | 三星电子株式会社 | Method for generating log-likelihood ratio for QAM-OFDM modulating signal |
| CN101222470A (en) * | 2008-01-31 | 2008-07-16 | 上海交通大学 | Channel estimation method for double-antenna generalized multi-carrier system |
| CN101662438A (en) * | 2008-08-28 | 2010-03-03 | 华为技术有限公司 | Wireless communication method, sending method, receiving and decoding method and device |
| CN102379098A (en) * | 2009-03-31 | 2012-03-14 | 高通股份有限公司 | Methods and apparatus for generation and use of reference signals in a communications system |
| CN102014088A (en) * | 2010-11-24 | 2011-04-13 | 信源通科技（西安）有限公司 | Method for assisting channel equalization by using automatic gain control (AGC) adjustment factors |
Non-Patent Citations (3)
| Title |
|---|
| 导频符号调制方式对OFDM信道估计的影响(英文);李明奇等;《电子科技大学学报》;20090131(第01期);第25-31页 * |
| 通用OFDM信号分析方案;Gregor Feldhaus等;《移动通信》;20080915(第17期);第81-85页 * |
| 遥感卫星OFDM高速数据传输系统;张朝阳;《空间电子技术》;20030930(第03期);第34-42页 * |
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