WO2019128167A1

WO2019128167A1 - Digital front-end equalization method and device

Info

Publication number: WO2019128167A1
Application number: PCT/CN2018/093410
Authority: WO
Inventors: 姜成玉; 刁穗东; 刘重军; 付杰尉
Original assignee: 京信通信系统（中国）有限公司; 京信通信系统（广州）有限公司; 京信通信技术(广州)有限公司; 天津京信通信系统有限公司
Priority date: 2017-12-29
Filing date: 2018-06-28
Publication date: 2019-07-04
Also published as: CN108111445B; CN108111445A

Abstract

Embodiments of the present invention relate to the technical field of communications, and in particular, to a digital front-end equalization method and device. The method comprises: reading an equalization sequence received by an equalization sequence receiving end; performing frequency domain transformation on the read equalization sequence of a channel undergoing equalization and a pre-stored reference equalization sequence, so as to obtain a frequency domain equalization sequence of the channel undergoing equalization and a reference frequency domain equalization sequence, respectively; determining a frequency domain response of the channel undergoing equalization on the basis of the frequency domain equalization sequence of the channel undergoing equalization and the reference frequency domain equalization sequence; determining, according to the frequency domain response, an equalization coefficient corresponding to the channel undergoing equalization; and performing equalization processing on the channel undergoing equalization according to the equalization coefficient. The method selects an equalization sequence and a pre-stored reference sequence rather than using an equalization sequence of any channel as a reference sequence. Therefore, the method is unaffected by the reference channel, and thus eliminates the effect of channel equalization on system performance, thereby improving system performance.

Description

Method and device for digital front end equalization

The present application claims priority to Chinese Patent Application No. 2009-11480580.9, entitled "A Method and Apparatus for Digital Front End Equilibrium", filed on December 29, 2017, the entire contents of which is incorporated herein by reference. In the application.

Technical field

Embodiments of the present invention relate to the field of communications, and in particular, to a method and apparatus for digital front end equalization.

Background technique

In the smart antenna system, the amplitude and phase characteristics of the RF channels in the RRU (Radio Remote Unit) may be inconsistent. The inconsistency between the channels may affect the performance of the smart antenna, which may affect the beam shaping of the antenna. The effect, therefore, channel equalization techniques must be used to compensate for the amplitude and phase errors of the RF channel. The purpose of the channel equalization technique is to adjust the amplitude phase of all RF channels of the RRU to the same amplitude phase.

The prior art uses the equalization sequence of any RF channel of the RRU as a reference channel, and equalizes the amplitude and phase of the remaining channels to the amplitude and phase of the reference channel. However, this technique amplitude equalization brings uncertainty and channel equalization. The performance is very relevant to the choice of the reference channel. For example, if the amplitude of the reference RF channel is too large, the channel equalization technique will increase the amplitude of all channels to be equalized, affecting system performance.

Summary of the invention

The present invention provides a method and apparatus for digital front end equalization to eliminate the influence of channel equalization on system performance, thereby improving system performance.

Embodiments of the present invention provide a method for digital front end equalization, including:

Reading an equalization sequence received by the receiving end of the equalization sequence;

Performing a frequency domain transform on the equalized sequence and the pre-stored reference equalization sequence of the channel to be equalized, respectively, to obtain a frequency domain equalization sequence and a reference frequency domain equalization sequence of the channel to be equalized;

Determining, according to the frequency domain equalization sequence of the channel to be equalized and the reference frequency domain equalization sequence, a frequency domain response of the channel to be equalized;

Determining, according to the frequency domain response, an equalization coefficient corresponding to the to-be-equalized channel;

And equalizing processing the channel to be equalized according to the equalization coefficient.

Preferably, the equalization sequence is an uplink equalization sequence;

Determining, according to the frequency domain equalization sequence of the to-be-equalized channel and the reference frequency domain equalization sequence, the frequency domain response of the to-be-equalized channel, including:

according to

Determining the frequency domain response of the uplink equalization of the channel to be equalized

Wherein said

a frequency domain response of the downlink equalization of the to-be-equalized channel, and when the current equalization channel does not complete downlink equalization,

Is 1;

Wherein said

For the reference frequency domain equalization sequence, the

A frequency domain equalization sequence of the channel to be equalized.

Preferably, the equalization sequence is a downlink equalization sequence;

Obtaining an average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence, where the downlink frequency domain equalization sequence is a frequency domain equalization sequence obtained by the frequency domain transformation of the downlink equalization sequence;

Obtain an average amplitude of the to-be-equalized channel according to an average power of the effective downlink equalization sequence;

Determining, according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the to-be-equalized channel, and the average power of the effective downlink equalization sequence and the average amplitude of the to-be-equalized channel, determining a frequency domain of the to-be-equalized channel response.

Preferably, the method further includes:

Determining, according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel, a gain adjustment factor of the to-be-equalized channel;

And performing gain adjustment on the to-be-equalized channel according to the gain adjustment factor.

Preferably, the obtaining the average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence includes:

And obtaining, according to the downlink frequency domain equalization sequence, an average power of the downlink frequency domain equalization sequence and an average power of the noise in the downlink frequency domain equalization sequence;

Obtain an average power of the effective downlink equalization sequence in the downlink equalization sequence according to an average power of the downlink frequency domain equalization sequence and an average power of the noise.

Preferably, the determining, according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the to-be-equalized channel, and the average power of the effective downlink equalization sequence and the average amplitude of the to-be-equalized channel, The frequency domain response of the channel to be equalized, including:

according to

Determining a frequency domain response of the downlink equalization of the channel to be equalized

Wherein said

a frequency domain response for uplink equalization of the to-be-equalized channel, and when the current to-be-equalized channel is not performing uplink equalization,

Is 1;

Wherein said

a reference frequency domain equalization sequence;

In order to describe the downlink frequency domain equalization sequence corresponding to the equalization channel, the Am _ref is an average amplitude of the reference frequency domain equalization sequence, the Am _i is an average amplitude of the to-be-equalized channel, and the Am _ref is based on The average power of the downlink frequency domain equalization sequence, the average power of the noise, the average power of the effective downlink equalization sequence, and the average amplitude of the to-equalization channel are obtained.

Preferably, the determining, according to the average power of the effective downlink equalization sequence and the average amplitude of the to-be-equalized channel, the gain adjustment factor of the to-be-equalized channel, including:

according to

Determining a gain adjustment factor GAIN for the equalization channel;

The Am _ref is an average amplitude of the reference frequency domain equalization sequence, and the Am _i is an average amplitude of the to-be-equalized channel.

The embodiment of the invention further provides a device for digital front end equalization, comprising:

a reading module, configured to read an equalization sequence received by the receiving end of the equalization sequence;

a transforming module, configured to perform frequency domain transform on the equalized sequence of the read equalized channel and the pre-stored reference equalized sequence, respectively, to obtain a frequency domain equalized sequence and a reference frequency domain equalized sequence of the to-equalized channel;

a determining module, configured to determine a frequency domain response of the to-be-equalized channel according to the frequency domain equalization sequence of the channel to be equalized and the reference frequency domain equalization sequence;

And an equalization module, configured to determine, according to the frequency domain response, an equalization coefficient corresponding to the to-be-equalized channel, and to perform equalization processing on the to-be-equalized channel according to the equalization coefficient.

Preferably, the equalization sequence is an uplink equalization sequence;

The determining module is specifically configured to:

according to

Wherein said

Is 1;

Wherein said

For the reference frequency domain equalization sequence, the

A frequency domain equalization sequence of the channel to be equalized.

Preferably, the equalization sequence is a downlink equalization sequence; the determining module is specifically configured to:

Preferably, the method further includes: a gain module;

The gain module is configured to determine a gain adjustment factor of the to-be-equalized channel according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel;

And is further configured to perform gain adjustment on the to-be-equalized channel according to the gain adjustment factor.

Preferably, the determining module is specifically configured to:

according to

Wherein said

Is 1;

Wherein said

a reference frequency domain equalization sequence;

Preferably, the gain module is specifically configured to:

according to

Determining a gain adjustment factor GAIN for the equalization channel;

Another embodiment of the present invention provides a computing device including a memory and a processor, wherein the memory is configured to store program instructions, and the processor is configured to invoke program instructions stored in the memory according to the obtained program. Perform any of the above methods.

Another embodiment of the present invention provides a computer readable storage medium storing computer executable instructions for causing the computer to perform any of the methods described above.

Embodiments of the present invention provide a computer program product that, when run on a computer, causes the computer to perform any of the methods described above.

The digital front-end equalization method provided by the foregoing embodiment includes: reading an equalization sequence received by the receiver of the equalization sequence; performing frequency domain transformation on the equalized sequence of the read channel to be equalized and the pre-stored reference equalization sequence, respectively a frequency domain equalization sequence and a reference frequency domain equalization sequence of the channel to be equalized; determining a frequency domain response of the channel to be equalized according to the frequency domain equalization sequence of the channel to be equalized and the reference frequency domain equalization sequence; The domain response determines an equalization coefficient corresponding to the to-be-equalized channel; and the equalization channel is equalized according to the equalization coefficient. It can be seen that when performing channel equalization, the frequency domain transform is performed on the equalized sequence of the read channel to be equalized and the pre-stored reference sequence respectively, and the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized are obtained; The frequency domain response of the channel to be equalized is determined according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized, and the equalization coefficient corresponding to the channel to be equalized is determined according to the frequency domain response; finally, the equalization channel is equalized according to the equalization coefficient. Rather than using the equalization sequence of any channel as a reference sequence, it is not affected by the reference channel, which can eliminate the impact of channel equalization on system performance and improve system performance.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic flowchart of a method for digital front end equalization according to an embodiment of the present invention;

2 is a schematic diagram of an uplink structure of an RRU according to an embodiment of the present invention;

3 is a schematic flowchart of a method for digital front end equalization according to another embodiment of the present invention;

4 is a schematic flowchart of a method for determining an average amplitude of a downlink equalization sequence according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for determining an average amplitude of a downlink reference sequence according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a downlink structure of an RRU according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a digital front end equalization apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a computing device according to an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail with reference to the accompanying drawings, in which . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that, in the embodiment of the present invention, the i-equalization channel is frequently used in the description, and the i-equalized channel refers to any equalization channel in the antenna.

FIG. 1 is a schematic flowchart diagram of a method for digital front-end equalization according to an embodiment of the present invention. As shown in FIG. 1 , the method may include:

S101. Read an equalization sequence received by the receiving end of the equalization sequence.

S102. Perform frequency domain transformation on the equalized sequence of the read channel to be equalized and the pre-stored reference equalization sequence, respectively, to obtain a frequency domain equalization sequence and a reference frequency domain equalization sequence of the channel to be equalized.

S103. Determine a frequency domain response of the channel to be equalized according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized.

S104. Determine an equalization coefficient corresponding to the channel to be equalized according to the frequency domain response.

S105. Perform equalization processing on the equalization channel according to the equalization coefficient.

In an implementation manner, in the foregoing step S101, the equalization sequence received by the receiving end of the equalization sequence may refer to reading the equalization sequence received by the receiving end of the equalization sequence in the RRU. When the equalization sequence received by the receiver of the equalization sequence refers to the equalization sequence received by the receiver of the equalization sequence in the RRU, the equalization sequence of the channel to be equalized in the step S102 may refer to the equalization sequence of the radio channel to be equalized. .

Optionally, when the equalization sequence is an uplink equalization sequence, in the foregoing step S103, determining a frequency domain response of the channel to be equalized according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized, and referring to the channel to be equalized The uplink frequency domain equalization sequence and the reference frequency domain equalization sequence determine the uplink frequency domain response of the channel to be equalized. After determining the uplink frequency domain response according to the uplink frequency domain equalization sequence and the pre-stored frequency domain reference sequence, the uplink frequency domain response may be subjected to IDFT (Inverse Discrete Fourier Transform) to obtain uplink equalization filtering. And then writing the uplink equalization filter coefficients into the corresponding uplink equalization filter to make the uplink equalization filter coefficients take effect.

Specifically, when the equalization sequence is an uplink equalization sequence, the frequency domain response of the uplink equalization of the channel to be equalized may be determined according to the following formula 1.

In the first formula,

The frequency domain response of the downlink equalization of the channel to be equalized, and when the current channel to be equalized is not downlink balanced,

Is 1, when the current equalization channel does not process the downlink equalization sequence,

Is 1.

For reference to the frequency domain equalization sequence,

The frequency domain equalization sequence of the channel to be equalized.

When the equalization sequence is an uplink equalization sequence, the method shown in FIG. 1 above can be applied to the RRU shown in FIG. 2, and can of course be applied to RRUs of other structures. FIG. 2 exemplarily shows a schematic structural diagram of an RRU to which the embodiment of the present invention is applied. As shown in FIG. 2, the method includes: multiple radio frequency transceivers, multiple equalization filters, equalization channels, and multiple ADCs (Analog-to- Digital Converter, analog to digital converter), multiple low noise amplifiers, coupling discs. When the method shown in FIG. 1 is applied to the RRU shown in FIG. 2, and when the equalization sequence is an uplink equalization sequence, two equalization sequences and a reference equalization sequence having the same length and content may be locally generated in advance, and then For any equalization channel, the equalization sequence is sent to the RF transceiver through the equalization channel, the coupling disc, the low noise amplifier, and the equalization filter, and the reference sequence is stored locally.

When the equalization sequence is the downlink equalization sequence, when determining the frequency domain response of the channel to be equalized according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized, the method flow shown in FIG. 3 may be used to determine the channel to be equalized. Frequency domain response.

S301. Obtain an average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence, where the downlink frequency domain equalization sequence is a frequency domain equalization sequence obtained by performing frequency domain transformation on the downlink equalization sequence.

S302. Obtain an average amplitude of the channel to be equalized according to an average power of the effective downlink equalization sequence.

S303. Determine a frequency domain response of the channel to be equalized according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the channel to be equalized, and the average power of the effective downlink equalization sequence and the average amplitude of the channel to be equalized.

In the foregoing step S301, when obtaining the average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence, the average power of the downlink frequency domain equalization sequence and the downlink frequency domain equalization sequence may be obtained according to the downlink frequency domain equalization sequence. The average power of the noise; then, the average power of the effective downlink equalization sequence in the downlink equalization sequence is obtained according to the average power of the downlink frequency domain equalization sequence and the average power of the noise.

In the foregoing step S303, when determining the frequency domain response of the channel to be equalized according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the channel to be equalized, and the average power of the effective downlink equalization sequence and the average amplitude of the channel to be equalized, The frequency domain response of the downlink equalization of the channel to be equalized can be determined according to the following formula 2

In the second formula,

The frequency domain response for the uplink equalization of the channel to be equalized, and when the current channel to be equalized is not uplink balanced,

Is 1, when the current equalization channel does not process the uplink equalization,

Is 1.

In the second formula,

For reference to the frequency domain equalization sequence;

For the downlink frequency domain equalization sequence corresponding to the channel to be equalized, Am _ref is the average amplitude of the reference frequency domain equalization sequence, Am _i is the average amplitude of the channel to be equalized, and Am _ref is the average power and noise according to the downlink frequency domain equalization sequence. The average power, the average power of the effective downlink equalization sequence, and the average amplitude of the channel to be equalized are obtained.

Preferably, the average amplitude Am _i of the downlink equalization sequence of the channel to be equalized can be determined by the method flow shown in FIG. 4 .

S401. Determine an average power of the downlink frequency domain equalization sequence and a noise power of the downlink frequency domain equalization sequence.

Specifically, after performing the frequency domain transform on the downlink time domain equalization sequence to obtain the downlink frequency domain equalization sequence, the average power of the downlink frequency domain equalization sequence may be determined according to the following formula 3.

In the third formula,

The value of the discrete Fourier operation of the value in the downlink frequency-domain equalization sequence of the i-th to be equalized channel, where N is the length of the downlink reference sequence, and P _i is the downlink frequency-domain equalization sequence of the i-th to be equalized channel. Average power.

After performing the frequency domain transform on the downlink time domain equalization sequence to obtain the downlink frequency domain equalization sequence, the noise average power of the downlink frequency domain equalization sequence may be determined according to the following formula 4.

In the fourth formula,

The value of the discrete Fourier operation of the downlink frequency-domain equalization sequence of the i-th to be equalized channel is f, N is the length of the downlink reference sequence, N _RE is the current bandwidth resource element number, and Powern _i is the i-th waiting The average noise power of the downlink frequency domain equalization sequence of the equalization channel.

S402. Determine an effective average power of the downlink frequency domain equalization sequence according to an average power of the downlink frequency domain equalization sequence and a noise power of the downlink frequency domain equalization sequence.

Specifically, after the average power P _{i of the} downlink frequency domain equalization sequence is obtained according to the above formula 3 and the noise average power Powern _{i of the} downlink frequency domain equalization sequence is obtained according to the above formula 4, the downlink frequency domain equalization sequence may be determined according to the following formula 5. Effective average power.

PowerS _i =P _i -Powern _i (Formula 5)

The average power of the downlink frequency domain equalization formula fifth sequence, P _i is the i th channel to be equalized, Powern _i is the i-th frequency channel to be equalized downlink average power of the noise domain equalization sequence, PowerS _i is the i th channel to be equalized The effective average power of the downlink frequency domain equalization sequence.

S403. Determine an average amplitude of a downlink frequency domain equalization sequence of the to-be-equalized channel according to an effective average power of the downlink frequency domain equalization sequence.

Specifically, after obtaining the effective average power of the downlink frequency domain equalization sequence according to the above formula 5, the average amplitude of the downlink equalization sequence may be determined according to the following formula 6.

In Equation 6, PowerS _i is the effective average power of the downlink frequency-domain equalization sequence of the i-th to be equalized channel, and Am _i is the average amplitude of the downlink frequency-domain equalization sequence of the i-th to be equalized channel.

In the foregoing step S402, determining the effective average power of the downlink frequency domain equalization sequence according to the average power of the downlink frequency domain equalization sequence and the noise power of the downlink frequency domain equalization sequence, in order to reduce the calculation amount, The following formula 7 directly determines the effective average power of the downlink frequency domain equalization sequence.

In Equation 7,

The value of the discrete Fourier operation of the downlink frequency-domain equalization sequence of the i-th to be equalized channel is f, N is the length of the downlink reference sequence, N _RE is the current bandwidth resource element number, and PowerS _i is the i-th waiting The effective average power of the downlink frequency domain equalization sequence of the equalization channel.

Then, according to the average power of the downlink frequency domain equalization sequence, the average amplitude of the downlink equalization sequence of the channel to be equalized is determined by using the above formula 6.

The average amplitude Am _{ref of the} reference sequence can be determined by the method flow shown in FIG. 5.

S501. Determine an average power of the frequency domain reference sequence and a noise power of the frequency domain reference sequence.

Specifically, after the frequency domain transform is performed on the reference sequence to obtain the frequency domain reference sequence, the average power of the downlink frequency domain reference sequence may be determined according to the following formula 10.

In Equation 8,

The value of the discrete Fourier operation with a value of f in the frequency domain reference sequence, N is the length of the reference sequence, and P _ref is the average power of the frequency domain reference sequence.

After performing the frequency domain transform on the reference sequence to obtain the frequency domain reference sequence, the noise average power of the frequency domain reference sequence may be determined according to the following formula 9.

In the formula nine,

The value of the discrete Fourier operation of the value in the frequency domain reference sequence is f, N is the length of the reference sequence, N _RE is the current bandwidth resource element number, and Powern _ref is the noise average power of the frequency domain reference sequence.

S502. Determine an effective average power of the frequency domain reference sequence according to the average power of the frequency domain reference sequence and the noise power of the frequency domain reference sequence.

Specifically, after obtaining the average power P _{ref of the} downlink frequency domain reference sequence according to the above formula 8 and obtaining the noise average power Powern _{ref of the} downlink frequency domain reference sequence according to the above formula 9, the downlink frequency domain reference sequence may be determined according to the following formula Effective average power.

PowerS _ref =P _ref -Powern _ref (Formula 10)

In Equation 10, P _ref is the average power of the frequency domain reference sequence, Powern _ref is the noise average power of the frequency domain reference sequence, and PowerS _ref is the effective average power of the frequency domain reference sequence.

S503. Determine an average amplitude of a frequency domain reference sequence of the channel to be equalized according to an effective average power of the frequency domain reference sequence.

Specifically, after obtaining the effective average power of the downlink frequency domain reference sequence according to the above formula 10, the average amplitude of the reference sequence may be determined according to the following formula 11.

In Equation 11, PowerS _ref is the effective average power of the frequency domain reference sequence, and Am _ref is the average amplitude of the reference sequence.

In the above step S502, the effective average power of the frequency domain reference sequence is determined according to the average power of the frequency domain reference sequence and the noise power of the frequency domain reference sequence. In the specific implementation, in order to reduce the calculation amount, the following formula may also be directly used according to the following formula. Twelve directly determines the effective average power of the frequency domain reference sequence.

In the formula twelve,

The value of the discrete Fourier operation of the frequency domain reference sequence in the frequency domain reference sequence of the i-th to be equalized channel, where N is the length of the reference sequence, N _RE is the current bandwidth resource element number, and PowerS _ref is the i-th to be equalized channel The effective average power of the frequency domain reference sequence.

Then, according to the average power of the frequency domain reference sequence, the average amplitude of the reference sequence of the channel to be equalized is determined by using Equation 11 above.

Optionally, when the equalization sequence is a downlink equalization sequence, in order to further reduce the equalization error, the equalization channel is further adjusted in gain, and when the equalization channel is subjected to gain adjustment, the average amplitude Am _i and the reference sequence according to the downlink equalization sequence may be used. The average amplitude Am _ref determines the downlink gain adjustment factor of the channel to be equalized, and then writes the downlink gain adjustment factor into the gain block to perform gain adjustment on the equalization channel.

Specifically, the downlink gain adjustment factor GAIN of the channel to be equalized can be determined according to the following formula thirteen.

Where Am _ref is the average amplitude of the reference frequency domain equalization sequence, and Am _i is the average amplitude of the channel to be equalized.

In an embodiment, the method shown in FIG. 3 can be applied to the RRU shown in FIG. 6. As shown in FIG. 6, the method includes: multiple radio transceivers, multiple equalization filters, and multiple clipping peaks. Module, multiple digital predistortion modules, multiple gain modules, multiple DACs (Digital-to-Analog Converter), multiple power amplifier modules, equalization channels, and coupling pads. Of course, it can also be applied to RRUs of other structures.

It can be seen from the above that when performing channel equalization, the frequency domain transform is performed on the equalized sequence of the read channel to be equalized and the pre-stored reference sequence respectively, and the frequency domain equalization sequence and the reference frequency domain equalization of the channel to be equalized are obtained. a sequence; then determining a frequency domain response of the channel to be equalized according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized, and determining an equalization coefficient corresponding to the channel to be equalized according to the frequency domain response; and finally performing the equalization channel according to the equalization coefficient Balance processing. Rather than using the equalization sequence of any channel as a reference sequence, it is not affected by the reference channel, which can eliminate the impact of channel equalization on system performance and improve system performance.

Based on the same technical concept, the embodiment of the present invention further provides a device for digital front-end equalization. As shown in FIG. 7, the device includes:

The reading module 701 is configured to read an equalization sequence received by the receiving end of the equalization sequence;

The transforming module 702 is configured to perform frequency domain transform on the equalized sequence of the read equalized channel and the pre-stored reference equalized sequence, respectively, to obtain a frequency domain equalized sequence and a reference frequency domain equalized sequence of the to-be-equalized channel;

a determining module 703, configured to determine a frequency domain response of the to-be-equalized channel according to the frequency domain equalization sequence of the to-be-equalized channel and the reference frequency-domain equalization sequence;

The equalization module 704 is configured to determine, according to the frequency domain response, an equalization coefficient corresponding to the to-be-equalized channel, and perform equalization processing on the to-be-equalized channel according to the equalization coefficient.

Preferably, the equalization sequence is an uplink equalization sequence; and the determining module 703 is specifically configured to:

according to

Wherein said

Is 1;

Wherein said

For the reference frequency domain equalization sequence, the

A frequency domain equalization sequence of the channel to be equalized.

Preferably, the equalization sequence is a downlink equalization sequence; and the determining module 703 is specifically configured to:

Preferably, the method further includes: a gain module 705;

The gain module 705 is configured to determine a gain adjustment factor of the to-be-equalized channel according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel;

Preferably, the determining module 703 is specifically configured to:

according to

Wherein said

Is 1;

Wherein said

a reference frequency domain equalization sequence;

Preferably, the gain module 705 is specifically configured to:

according to

Determining a gain adjustment factor GAIN for the equalization channel;

Based on the same technical concept, the embodiment of the present invention further provides a computing device, which may be a desktop computer, a portable computer, a smart phone, a tablet computer, a personal digital assistant (PDA), or the like. FIG. 8 is a schematic structural diagram of a computing device according to an embodiment of the present invention. The computing device may include a central processing unit (CPU), a memory 802, an input/output device 803, a bus 804, and the like. The input device may include a keyboard, a mouse, a touch screen, etc., and the output device 4 may include a display device such as a liquid crystal display (LCD), a cathode ray tube (CRT), or the like.

Memory 802 can include read only memory (ROM) and random access memory (RAM) and provides program instructions and data stored in the memory to the processor. In the embodiment of the present invention, the memory may be used to store a program of the method provided by any embodiment of the present invention, and the processor executes the method disclosed in any one of the embodiments according to the obtained program instruction by calling a program instruction stored in the memory. .

Based on the same technical concept, an embodiment of the present invention further provides a computer readable storage medium for storing computer program instructions for use in the above computing device, comprising a program for executing the method disclosed in any of the above embodiments.

The computer storage medium can be any available media or data storage device accessible by a computer, including but not limited to magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memories (for example, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state hard disk (SSD)).

Based on the same technical concept, an embodiment of the present invention further provides a computer program product, which when executed on a computer, causes the computer to perform the method disclosed in any of the above embodiments.

In summary, whether it is doing uplink channel equalization or downlink channel equalization, the reference sequence and the equalization sequence are selected instead of using the equalization sequence of any channel as the reference sequence, so it is not affected by the reference channel. This eliminates the impact of channel equalization on system performance, which in turn improves system performance.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, or a computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the invention as claimed.

Claims

A method for digital front end equalization, comprising:

Reading an equalization sequence received by the receiving end of the equalization sequence;

Performing frequency domain transformation on the equalized sequence of the read equalized channel and the pre-stored reference equalization sequence, respectively, to obtain a frequency domain equalization sequence and a reference frequency domain equalization sequence of the to-be-equalized channel;

Determining, according to the frequency domain equalization sequence of the channel to be equalized and the reference frequency domain equalization sequence, a frequency domain response of the channel to be equalized;

Determining, according to the frequency domain response, an equalization coefficient corresponding to the to-be-equalized channel;

And equalizing processing the channel to be equalized according to the equalization coefficient.
The method according to claim 1, wherein the equalization sequence is an uplink equalization sequence;

Determining, according to the frequency domain equalization sequence of the to-be-equalized channel and the reference frequency domain equalization sequence, the frequency domain response of the to-be-equalized channel, including:

according to
Determining the frequency domain response of the uplink equalization of the channel to be equalized
Wherein said
a frequency domain response of the downlink equalization of the to-be-equalized channel, and when the current equalization channel is not downlink balanced,
Is 1;

Wherein said
For the reference frequency domain equalization sequence, the
A frequency domain equalization sequence of the channel to be equalized.
The method according to claim 1, wherein the equalization sequence is a downlink equalization sequence;

Determining, according to the frequency domain equalization sequence of the to-be-equalized channel and the reference frequency domain equalization sequence, the frequency domain response of the to-be-equalized channel, including:

Obtaining an average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence, where the downlink frequency domain equalization sequence is a frequency domain equalization sequence obtained by the frequency domain transformation of the downlink equalization sequence;

Obtain an average amplitude of the to-be-equalized channel according to an average power of the effective downlink equalization sequence;

Determining, according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the to-be-equalized channel, and the average power of the effective downlink equalization sequence and the average amplitude of the to-be-equalized channel, determining a frequency domain of the to-be-equalized channel response.
The method of claim 3, wherein the method further comprises:

Determining, according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel, a gain adjustment factor of the to-be-equalized channel;

And performing gain adjustment on the to-be-equalized channel according to the gain adjustment factor.
The method according to claim 3, wherein the obtaining the average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence comprises:

And obtaining, according to the downlink frequency domain equalization sequence, an average power of the downlink frequency domain equalization sequence and an average power of the noise in the downlink frequency domain equalization sequence;

Obtain an average power of the effective downlink equalization sequence in the downlink equalization sequence according to an average power of the downlink frequency domain equalization sequence and an average power of the noise.
The method according to claim 5, wherein the downlink frequency domain equalization sequence corresponding to the to-be-equalized channel and the reference frequency domain equalization sequence, and the average power of the effective downlink equalization sequence and the The average amplitude of the channel to be equalized determines the frequency domain response of the channel to be equalized, including:

according to
Determining a frequency domain response of the downlink equalization of the channel to be equalized
Wherein said
a frequency domain response for uplink equalization of the to-be-equalized channel, and when the current to-be-equalized channel is not performing uplink equalization,
Is 1;

Wherein said
a reference frequency domain equalization sequence;
In order to describe the downlink frequency domain equalization sequence corresponding to the equalization channel, the Am ref is an average amplitude of the reference frequency domain equalization sequence, the Am i is an average amplitude of the to-be-equalized channel, and the Am ref is based on The average power of the downlink frequency domain equalization sequence, the average power of the noise, the average power of the effective downlink equalization sequence, and the average amplitude of the to-equalization channel are obtained.
The method according to claim 4, wherein the determining a gain adjustment factor of the to-be-equalized channel according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel comprises:

according to
Determining a gain adjustment factor GAIN for the equalization channel;

The Am ref is an average amplitude of the reference frequency domain equalization sequence, and the Am i is an average amplitude of the to-be-equalized channel.
A device for digital front-end equalization, comprising:

a reading module, configured to read an equalization sequence received by the receiving end of the equalization sequence;

a transforming module, configured to perform frequency domain transform on the equalized sequence of the read equalized channel and the pre-stored reference equalized sequence, respectively, to obtain a frequency domain equalized sequence and a reference frequency domain equalized sequence of the to-equalized channel;

a determining module, configured to determine a frequency domain response of the to-be-equalized channel according to the frequency domain equalization sequence of the channel to be equalized and the reference frequency domain equalization sequence;

And an equalization module, configured to determine, according to the frequency domain response, an equalization coefficient corresponding to the to-be-equalized channel, and to perform equalization processing on the to-be-equalized channel according to the equalization coefficient.
The apparatus according to claim 8, wherein the equalization sequence is an uplink equalization sequence;

The determining module is specifically configured to:

according to
Determining the frequency domain response of the uplink equalization of the channel to be equalized
Wherein said
a frequency domain response of the downlink equalization of the to-be-equalized channel, and when the current equalization channel does not complete downlink equalization,
Is 1;

Wherein said
For the reference frequency domain equalization sequence, the
A frequency domain equalization sequence of the channel to be equalized.
The apparatus according to claim 8, wherein the equalization sequence is a downlink equalization sequence;

The determining module is specifically configured to:

Obtaining an average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence, where the downlink frequency domain equalization sequence is a frequency domain equalization sequence obtained by the frequency domain transformation of the downlink equalization sequence;

Obtain an average amplitude of the to-be-equalized channel according to an average power of the effective downlink equalization sequence;

Determining, according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the to-be-equalized channel, and the average power of the effective downlink equalization sequence and the average amplitude of the to-be-equalized channel, determining a frequency domain of the to-be-equalized channel response.
The device according to claim 10, further comprising: a gain module;

The gain module is configured to determine a gain adjustment factor of the to-be-equalized channel according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel;

And is further configured to perform gain adjustment on the to-be-equalized channel according to the gain adjustment factor.
The device according to claim 10, wherein the determining module is specifically configured to:

Obtaining, according to the downlink frequency domain equalization sequence, an average power of the downlink frequency domain equalization sequence and an average power of the noise in the downlink frequency domain equalization sequence;

Obtain an average power of the effective downlink equalization sequence in the downlink equalization sequence according to an average power of the downlink frequency domain equalization sequence and an average power of the noise.
The device according to claim 12, wherein the determining module is specifically configured to:

according to
Determining a frequency domain response of the downlink equalization of the channel to be equalized
Wherein said
a frequency domain response for uplink equalization of the to-be-equalized channel, and when the current to-be-equalized channel is not performing uplink equalization,
Is 1;

Wherein said
a reference frequency domain equalization sequence;
In order to describe the downlink frequency domain equalization sequence corresponding to the equalization channel, the Am ref is an average amplitude of the reference frequency domain equalization sequence, the Am i is an average amplitude of the to-be-equalized channel, and the Am ref is based on The average power of the downlink frequency domain equalization sequence, the average power of the noise, the average power of the effective downlink equalization sequence, and the average amplitude of the to-equalization channel are obtained.
The device according to claim 11, wherein the gain module is specifically configured to:

according to
Determining a gain adjustment factor GAIN for the equalization channel;

The Am ref is an average amplitude of the reference frequency domain equalization sequence, and the Am i is an average amplitude of the to-be-equalized channel.
A computing device, comprising:

a memory for storing program instructions;

And a processor, configured to invoke program instructions stored in the memory, to perform the method of any one of claims 1 to 7 in accordance with the obtained program.
A computer readable storage medium, wherein the computer readable storage medium stores computer executable instructions for causing the computer to perform the method of any one of claims 1 to method.
A computer program product, characterized in that when the computer program product is run on a computer, the computer is caused to perform the method of any one of claims 1 to 7.