WO2020001397A1

WO2020001397A1 - Signal processing method and related apparatus

Info

Publication number: WO2020001397A1
Application number: PCT/CN2019/092538
Authority: WO
Inventors: 张烈; 肖宇翔; 李翔麟
Original assignee: 华为技术有限公司
Priority date: 2018-06-30
Filing date: 2019-06-24
Publication date: 2020-01-02
Also published as: CN110661736B; CN110661736A

Abstract

Disclosed are a signal processing method, a related apparatus, and a system. The method may comprise: a signal transmission apparatus determines equalizing coefficients respectively corresponding to a plurality of radio frequency channels, the radio frequency channel being used for transmitting a broadband signal, and a broadband being obtained by performing multi-carrier splicing or carrier aggregation; and the signal transmission apparatus performs radio frequency channel correction on the broadband signal by using the equalizing coefficient, the equalizing coefficient reflecting the influence of the radio frequency channel on the performance of an inband signal of the broadband and on the performance of an outband signal of the broadband. The implementation of the present application can ensure the correction performance of an edge subcarrier when a broadband signal is subjected to radio frequency correction, so as to ensure the beamforming performance.

Description

Signal processing method and related device

Technical field

The present application relates to the field of communication technologies, and in particular, to a signal processing method and a related device.

Background technique

With the development of communication technology, the Third Generation Partnership Project (3GPP) has formulated a next generation mobile communication network architecture (called a 5G network architecture). Massive multiple-iput (multiple-output, Massive MIMO) is one of the key technologies of 5G. Massive MIMO increases the number of antennas in a large-scale antenna array to increase system capacity, provide higher data rates, and improve Spectral efficiency.

Because Massive MIMO has increased the number of uplink and downlink antennas of wireless transceivers, the number of corresponding uplink radio frequency channels and downlink radio frequency channels has also increased significantly. Among them, each radio frequency channel affects the transmitted signal differently. In order to ensure the beamforming performance in Massive MIMO scenarios, radio frequency channel correction is required to make each radio frequency channel have the same impact on the transmitted signal as much as possible. That is, make the response of each RF channel as same as possible.

In the Massive MIMO scenario of 5G and NR, how to perform RF channel calibration to ensure the performance of beamforming is an urgent problem to be solved.

Summary of the invention

This application provides a signal processing method, related device, and system. When performing radio frequency correction on a wideband signal, the correction performance of edge subcarriers can be guaranteed, thereby ensuring the performance of beamforming.

In a first aspect, the present application provides a signal processing method applied to a signal transmission device. The method may include: the signal transmission device determines equalization coefficients corresponding to a plurality of radio frequency channels; the radio frequency channel is used to transmit a broadband signal, and the broadband is Multi-carrier splicing or carrier aggregation is obtained; the signal transmission device uses an equalization coefficient to perform radio frequency channel correction on the wideband signal; the equalization coefficient reflects the performance impact of the radio frequency channel on the broadband in-band signal and the performance of the broadband out-of-band signal influences.

Implementing the method of the first aspect, since the equalization coefficient reflects the performance impact of the RF channel on the broadband in-band signal and the performance impact on the broadband out-of-band signal, when performing radio frequency correction on the broadband signal, the edge subcarriers can be guaranteed Correction performance to ensure the performance of beamforming.

With reference to the first aspect, in an optional embodiment, the signal transmission device may determine equalization coefficients corresponding to a plurality of radio frequency channels respectively according to a full bandwidth training signal and a full bandwidth loopback signal; the full bandwidth loopback signal is determined by the full bandwidth The training signal is obtained through the transmission of the radio frequency channel.

Optionally, in the above-mentioned optional embodiment, the signal transmission device may further generate the full-bandwidth training signal according to the broadband in-band signal and the out-band signal. In a possible implementation manner, the signal transmission device generates the broadband out-of-band signal according to a full-bandwidth initial training signal and the broadband in-band signal. Further, the signal transmission device may generate a full-bandwidth training signal according to the broadband in-band signal, out-band signal, and out-band signal gain control factor.

Optionally, in the above optional embodiment, the signal transmission device may further transmit the full-bandwidth training signal through a radio frequency channel to obtain the full-bandwidth loopback signal.

Optionally, in the above-mentioned optional embodiment, the signal transmission device may determine the equalization coefficients corresponding to the multiple radio frequency channels by using the following formulas:

Among them, J is the cost function, T ₂ (n) is the full-bandwidth training signal, T ′ ₂ (ni) is the full-bandwidth loopback signal, c _i is the equalization coefficient, n is the number of sampling points, N is the total number of sampling points, and M is The number of taps of the equalizer corresponding to the RF channel.

With reference to the first aspect or any possible implementation manner of the first aspect, the signal transmission device can perform radio frequency channel correction on a broadband signal by using the following formula:

S ′ ₁ (n) = S ₁ (n) * h _s1 (n)

Among them, S ₁ (n) is a wideband signal, S ′ ₁ (n) is a signal obtained by performing a radio frequency channel correction on the wideband signal, h _s1 (n) is an impulse response of an equalizer corresponding to the radio frequency channel, and c _i Is the equalization coefficient, and n is the number of sampling points.

Optionally, the broadband signal is a full-band signal or a molecular band signal.

Optionally, the performance impact includes at least one or more of an amplitude impact, a phase impact, or a delay impact.

Optionally, the signal transmission device is a receiver or a transmitter.

In a second aspect, the present application provides a signal transmission device for implementing the signal processing method provided in the first aspect. The signal transmission device may include a radio frequency channel, an antenna, an equalization coefficient extraction module, and an equalizer. The radio frequency channel is connected to the antenna, and the equalizer is connected to the equalization coefficient extraction module.

The equalization coefficient extraction module is used to determine equalization coefficients corresponding to a plurality of RF channels respectively;

The radio frequency channel is used to transmit a wideband signal obtained by multi-carrier splicing or carrier aggregation;

The equalizer is used to correct a radio frequency channel of a broadband signal by using the equalization coefficient; the equalization coefficient reflects a performance influence of the radio frequency channel on a broadband in-band signal and a performance influence on a broadband out-of-band signal;

The antenna is used for transmitting the wideband signal.

With reference to the second aspect, in an optional embodiment, the equalization coefficient extraction module is specifically configured to determine the equalization coefficients corresponding to the multiple radio frequency channels respectively according to the full bandwidth training signal and the full bandwidth loopback signal; the full bandwidth loopback signal It is obtained by transmitting the full-bandwidth training signal through a radio frequency channel.

Optionally, in the above optional embodiment, the apparatus may further include a training signal generating module configured to generate a full-bandwidth training signal according to a wideband in-band signal and an out-of-band signal. In a possible implementation manner, the training signal generating module is further configured to generate the broadband out-of-band signal according to the full-band initial training signal and the broadband in-band signal. Further, the training signal generating module is specifically configured to generate the full-bandwidth training signal according to a broadband in-band signal, an out-band signal, and an out-band signal gain control factor.

Optionally, in the above optional embodiment, the training signal generating module is further configured to transmit a full-bandwidth training signal through a radio frequency channel; the equalization coefficient extraction module is further configured to receive the full-bandwidth loopback signal.

Optionally, in the above-mentioned optional embodiment, the equalization coefficient extraction module is specifically configured to determine the equalization coefficients corresponding to the multiple radio frequency channels respectively by the following formula:

Among them, J is the cost function, T ₂ (n) is the full-bandwidth training signal, T ′ ₂ (ni) is the full-bandwidth loopback signal, c _i is the equalization coefficient, n is the number of sampling points, N is the total number of sampling points, and M is The number of taps of the equalizer corresponding to the radio frequency channel.

With reference to the second aspect or any possible implementation manner of the second aspect, the equalizer may be specifically configured to perform radio frequency channel correction on the broadband signal by using the following formula:

S ′ ₁ (n) = S ₁ (n) * h _s1 (n)

Optionally, the signal transmission device is a receiver or a transmitter.

In a third aspect, the present application provides a signal transmission device, and the signal transmission device may include a plurality of functional modules, and is configured to execute the method provided in the first aspect or a possible implementation manner of the first aspect.

In a fourth aspect, the present application provides a network device, which is configured to execute the method provided in the first aspect or a possible implementation manner of the first aspect. The network device may include: a memory, and a processor and a transceiver coupled to the memory, where the transceiver is configured to communicate with other communication devices, and the memory is configured to store the first aspect or a possible implementation manner of the first aspect The implementation code of the signal processing method described, the processor is configured to execute the program code stored in the memory, that is, to execute the method provided by the first aspect, or the method provided by any one of the possible implementation manners of the first aspect. method. The transceiver and / or the receiver is a signal transmission device provided by the second aspect or the third aspect.

In a fifth aspect, the present application provides a computer-readable storage medium having instructions stored on the readable storage medium, which when executed on a computer, causes the computer to execute the signal processing method described in the first aspect above.

In a sixth aspect, the present application provides a computer program product containing instructions that, when run on a computer, causes the computer to execute the signal processing method described in the first aspect above.

When this application is implemented, when performing radio frequency correction on a wideband signal, the correction performance of edge subcarriers can be ensured, thereby ensuring the performance of beamforming.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a radio frequency channel provided by this application;

FIG. 2 is a schematic structural diagram of two types of broadband provided by this application;

FIG. 3 is a schematic diagram of in-band and out-of-band structures provided by the present application;

4 is a schematic structural diagram of a full bandwidth provided by this application;

5 is a schematic flowchart of a signal processing method provided by the present application;

6A-6C are schematic diagrams of signal generation provided by the present application;

FIG. 7 is a schematic structural diagram of a transmitter provided by this application;

8 is a schematic structural diagram of a receiver provided by this application;

FIG. 9 is a schematic structural diagram of a network device provided by this application;

FIG. 10 is a functional block diagram of a signal transmission device provided by the present application.

detailed description

The terms used in the embodiments of the present application are only used to explain specific examples of the present application, and are not intended to limit the present application.

The part of the wireless transceiver near the antenna for transmitting signals is called the radio frequency channel, the radio frequency channel in the transmitter is called the transmitting radio frequency channel, and the radio frequency channel in the receiver is called the receiving radio frequency channel. Referring to FIG. 1, FIG. 1 shows a schematic diagram of a radio frequency channel in a possible transmitter and receiver. As shown in Figure 1, different antennas correspond to radio frequency channels. Therefore, in the Massive MIMO scenario, the transceivers include multiple radio frequency channels.

During the transmission of a signal in the radio frequency channel, the signal is affected by the radio frequency channel, that is, the parameters such as the amplitude, phase, and delay of the signal after the radio frequency channel change. Due to manufacturing processes and other objective reasons, the characteristics of each RF channel cannot be completely consistent, so the impact of each RF channel on the signal is also different.

In order to ensure the performance of beamforming in the Massive MIMO scenario, it is necessary that the impact of each RF channel in the receiver / transmitter on the signal is the same as possible. Since each radio frequency channel has different influence on the signal, radio frequency channel correction is required so that each radio frequency channel after correction has the same influence on the signal as possible.

The correction of the RF channel is usually achieved by equalization technology, which is a signal processing or filtering technology that eliminates or reduces inter-symbol crosstalk. Normally, equalization can be achieved through an equalizer. The equalizer can evaluate the characteristics of the RF channel and modify the equalization coefficient to compensate for the signal distortion caused by the RF channel. Among them, the equalization coefficient is the main parameter of the equalizer. Different equalization coefficients have different compensation effects on the RF channel.

Specifically, the equalizer can be implemented by a filter, which can be used to compensate for distorted pulses, correct or remove inter-symbol interference, and can adapt to the characteristics of different radio frequency channels to compensate for different radio frequency channels.

At present, the existing RF channel calibration methods usually have the following two methods:

(1) The time domain signal is converted into a frequency domain signal, and the response of each radio frequency channel (that is, the actual influence of each radio frequency channel on the signal) is obtained, and the radio frequency channel is corrected according to the response.

Specifically, first, input a signal into an actual electronic device to obtain an actual output signal; then, input the signal into an ideal electronic device (each RF channel in the ideal electronic device has almost the same effect on the signal) to obtain an ideal output signal; The signal and the ideal output signal are converted into the frequency domain to obtain the actual frequency domain signal and the ideal frequency domain signal, and the two are compared to calculate the RF channel correction function (including the equalization coefficient). Finally, the correction function is used to perform the signal output from the actual electronic device. Correction.

The first (1) correction method converts time-domain signals into frequency-domain signals to obtain the RF channel response, calculates the equalization coefficients, and performs channel correction. This method has no constraints on the out-of-band signals of the equalizer. When the carrier signal is transmitted, the correction effect on the edge carrier is poor.

(2) When the signal is a baseband signal, that is, before the signal is not converted into a radio frequency signal, the signal is corrected according to a correction function.

In a 5G new radio (NR) system, the baseband signal may be transmitted in multiple subbands. Therefore, when using the method (2), each subband may need to be corrected separately, and then stitching is performed after correction. After splicing, they are converted into RF signals. Here, the subband splicing will result in poor continuity at the splicing place and affect the correction effect.

Based on the above-mentioned shortcomings of the prior art, the present application proposes a signal processing method, related device and system, which can correct the radio frequency channel and improve the correction effect to ensure the performance of beamforming in Massive MIMO scenarios.

Before introducing the signal processing method of this application, first introduce the basic concepts involved in this application.

(1) Broadband signal

In the present application, the signal transmission device is used to transmit (receive or transmit) a broadband signal, that is, the signal transmission device is based on a broadband transmission signal. Here, the broadband is obtained by multi-carrier splicing or obtained by carrier aggregation. That is, the broadband used for transmitting signals in this application may include multiple subcarriers.

Optionally, the broadband in this application may include continuous subcarriers, and may also include non-continuous subcarriers. When the broadband is composed of continuous sub-carriers, the broadband may be referred to as a full band; when the broadband is composed of non-continuous sub-carriers, the broadband may be referred to as a molecular band. Referring to FIG. 2, FIG. 2 shows two possible forms of broadband in the present application. The broadband in the above figure is composed of continuous subcarriers, and the broadband in the following figure is composed of discontinuous subcarriers.

(2) In-band and out-of-band

In the present application, the frequency band in the broadband in the above point (1) can be divided into an in-band frequency band and a transition band, where the transition band is a frequency band between the in-band frequency band and the out-of-band frequency band. That is, the edge subcarrier of the broadband is a transition band.

Referring to FIG. 3, a schematic diagram of a possible in-band frequency band, out-of-band frequency band, and transition band is shown. As shown in FIG. 3, the broadband signal mentioned in the present application is a signal transmitted based on an in-band frequency band and a transition band. That is, when the signal transmission device transmits a broadband signal, it is not only based on the in-band frequency band, but also based on the transition band.

In subsequent embodiments, this application will discuss how to perform radio frequency channel correction on a wideband signal, and how to ensure the correction effect of edge subcarriers, thereby ensuring the performance of beamforming.

(Three) full bandwidth signal

In this application, a signal transmitted based on the out-of-band frequency band is referred to as the wideband out-of-band signal, and a signal composed of the wideband signal and the out-of-band signal is referred to as a full-bandwidth signal. As shown in FIG. 4, FIG. 4 shows a full bandwidth signal based on FIG. 3.

Referring to FIG. 5, FIG. 5 is a schematic flowchart of a signal processing method provided by the present application. In the embodiment of FIG. 5, the signal transmission device refers to a receiver / transmitter, which includes a radio frequency channel. The signal transmission device can send / receive signals through radio frequency, and correct the radio frequency channel to realize broadband signals. The optimized correction can ensure the correction effect of the edge subcarriers, thereby ensuring the performance of beamforming.

As shown in FIG. 5, the method may include the following steps:

S101. The signal transmission device determines equalization coefficients corresponding to a plurality of radio frequency channels, respectively. The radio frequency channel is used to transmit a broadband signal, and the broadband is obtained by multi-carrier splicing or carrier aggregation.

First, a signal transmission device of the present application is described.

In the present application, the signal transmission device is used to transmit a broadband signal, and may be a multi-antenna receiver or a multi-antenna transmitter. In specific implementation, the signal transmission device may be a wireless transmitter / receiver of a base station in a 5G NR system, or may be a wireless transmitter / receiver in another orthogonal frequency division multiplexing (OFDM) system. The receiver may also be a wireless transmitter / receiver in an adaptive antenna system (AAS), which is not limited in this application.

Since the signal transmission device has multiple antennas, each antenna corresponds to a radio frequency channel. As shown in FIG. 1, in a signal transmission device, a radio frequency channel is a transmission channel between an antenna and a signal processing module (for generating a signal or for processing a received signal).

Specifically, the signal transmission device transmits a broadband signal through a radio frequency channel. As shown in FIG. 1, when the signal transmission device is a multi-antenna transmitter, the signal transmission device is used to transmit a broadband signal through a radio frequency channel; when the signal transmission device is a multi-antenna receiver, the signal transmission device is used to transmit a radio signal through the radio frequency channel. Receive broadband signals. Among them, each radio frequency channel is used to transmit / receive one broadband signal, that is, the signal transmission device can receive / transmit multiple broadband signals through multiple radio frequency channels. The signal processing method of the present application is mainly used to perform radio frequency channel correction on all or a part of the multiple wideband signals.

The broadband signal of the present application will be described below.

In this application, a broadband signal refers to a signal whose transmission frequency band is a broadband, which is obtained by multi-carrier splicing or carrier aggregation. Which carriers are obtained by splicing or which carriers are aggregated for the broadband is determined by the subband or subcarrier activated by the current signal transmission device. Here, the number of carriers for broadband splicing or aggregation is plural, which is not limited in this application. Optionally, when the broadband is obtained by carrier aggregation, multiple aggregated sub-carriers may be targeted at the same user; when the broadband is obtained by multi-carrier splicing, the multiple carriers that are spliced may be targeted at different users, respectively.

Optionally, the wideband may be a full band or a molecular band, that is, a signal transmitted by the signal transmission device may be a full band signal or a molecular band signal.

Understandably, for other detailed descriptions of the broadband signal, reference may be made to the related description of the basic concept of the first point (a) above, and details are not described herein again.

In the above step S101, specifically, the signal transmission device determines an equalization coefficient corresponding to each of the plurality of radio frequency channels. Here, the plurality of radio frequency channels may be radio frequency channels corresponding to some antennas among multiple antennas configured by the signal transmission device, or radio frequency channels corresponding to all antennas, which are not limited in this application. In a specific embodiment, the plurality of radio frequency channels may be radio frequency channels corresponding to antennas used by a current signal transmission device to transmit a broadband signal.

Specifically, the equalization coefficient of the radio frequency channel determined by the signal transmission device reflects the influence of the radio frequency channel on the performance of the broadband in-band signal and the performance of the broadband out-of-band signal. The broadband is a frequency band used by the signal transmission device mentioned above for transmitting signals, and reference may be made to the foregoing description. Here, the influence of the radio frequency channel on the performance of the in-band signal may include at least one of the following: one or more of an amplitude effect, a phase effect, and a delay effect of the in-band signal. Similarly, the impact of the radio frequency channel on the performance of the out-of-band signal may also include at least one of the following: one or more of the influence of the amplitude, phase, and delay of the out-of-band signal.

In this application, there are various methods for the signal transmission device to determine the equalization coefficient of the radio frequency channel, which is not limited in this application. A possible way to determine the equalization coefficient of the RF channel is described in detail below.

In an alternative embodiment, the signal transmission device may determine the equalization coefficients corresponding to the plurality of radio frequency channels respectively according to the full bandwidth training signal and the full bandwidth loopback signal; the full bandwidth loopback signal is transmitted by the full bandwidth training signal through the radio frequency channel. Get it. Specifically, an equalization coefficient corresponding to any one of the plurality of radio frequency channels may be determined according to a full bandwidth training signal and a full bandwidth loopback signal. Among them, the full-bandwidth training signal is composed of the above-mentioned wideband in-band signal and out-of-band signal. Therefore, the full-bandwidth loopback signal obtained after the full-bandwidth training signal passes through the radio frequency can reflect the performance of the RF channel on the in-band signal The impact can also reflect the performance impact of the RF channel on the out-of-band signal.

In a specific implementation manner, the signal transmission device may determine the equalization coefficients corresponding to the plurality of radio frequency channels according to Formula 1 and Formula 2:

In Equations 1 and 2, J is the cost function, T ₂ (n) is the full-bandwidth training signal, T ′ ₂ (ni) is the full-bandwidth loopback signal, c _i is the equalization coefficient, n is the number of sampling points, and N is The total number of sampling points, M is the number of taps of the equalizer corresponding to the radio frequency channel. It can be understood that the signal transmission device determines the equalization coefficient corresponding to each radio frequency channel in the plurality of radio frequency channels according to formula 1 and formula 2, respectively, and the parameters in formula 1 and formula 2 respectively correspond to each radio frequency channel.

In the foregoing optional embodiment, before the signal transmission device determines the equalization coefficient of the radio frequency channel, the signal transmission device may further generate a full-bandwidth training signal according to the broadband in-band signal and the out-band signal. Here, for the concepts of the above-mentioned broadband in-band signals, out-of-band signals, and full-bandwidth signals, reference may be made to the related description of the above-mentioned basic concept (2). In a specific implementation manner, the signal transmission device generates a full-bandwidth training signal according to the broadband in-band signal, out-of-band signal, and out-of-band signal gain control factor. Optionally, the signal transmission device may generate the full-bandwidth training signal according to Formula 3:

T ₂ = S ₁ + αS ₂ Formula 3

In Equation 3, T _{2 is} the full-bandwidth training signal, S _{1 is} the wide-band in-band signal, S _{2 is} the wide-band out-of-band signal, and α is the out-of-band signal gain control factor. See FIG. 6A, the example shows the T ₂ generation process. Here, α is used to ensure that the amplitude of the out-of-band signal in the full-bandwidth training signal satisfies the adjacent channel leakage ratio (ACLR) index. The formula 3 can make the full-bandwidth training signal transmitted by the signal transmission device comply with the protocol. Provisions will not affect the normal use of this out-of-band frequency band to transmit signals to other equipment. Optionally, the specific value of α can be set in advance or can be dynamically changed according to the actual situation, which is not limited in this application.

The broadband in-band signal may be a signal having an arbitrary frequency band and the same broadband frequency band. In a specific implementation manner, the broadband in-band signal may be a signal that the signal transmission device will initially send based on the broadband (that is, an initially generated in-band signal that has not yet been transmitted through the radio frequency channel) or an initially received signal (that is (In-band signals transmitted by other devices originally received through the antenna have not been transmitted via the RF channel). Here, when the broadband in-band signal is an initially transmitted signal, the signal transmission device may obtain the in-band signal through high-level software. When the broadband in-band signal is an initially received signal, the signal transmission device may also use high-level software. Get the in-band signal. Optionally, when the in-band signal is obtained by a high-level software, it may be obtained by filtering. For example, suppose that two carriers are activated in a cell in a 5G NR system, and the center frequencies of the two carriers are ω ₁ and ω _{2 respectively} . The signal transmission device can synthesize a matched filter through a filter corresponding to the frequency point. The coefficient CF of the synthesized matched filter is:

After the matched filter is synthesized, the following formula can be used to generate the in-band signal S ₁ :

S ₁ = T ₁ * CF Equation 5

In Formula 4 and Formula 5, T ₁ is the full-bandwidth initial training signal, and its generation process can refer to the subsequent related descriptions. F ₁ is the coefficient of the filter corresponding to ω ₁ , and F ₁ is the coefficient of the filter corresponding to ω ₂ . See FIG. 6B, 6B exemplary illustrates _a generation process of S.

The wideband out-of-band signal is a signal whose frequency band is outside the wideband frequency band. In a possible implementation manner, the signal transmission device may generate the wideband out-of-band signal according to the full-band initial training signal and the in-band signal of the foregoing bandwidth. That is, the signal transmission device may filter the wideband in-band signal in the full bandwidth initial training signal to generate the wideband out-of-band signal. Here, the full-bandwidth initial training signal may be generated by the signal transmission device according to the wideband in-band signal and a certain generation rule. For example, the actual bandwidth of the full-bandwidth initial training signal is 110% -120% of the in-band signal. The application does not limit this generation rule. Optionally, the signal transmission device may generate the wideband out-of-band signal according to Formula 6:

In Equation 6, S _{2 is} the broadband out-of-band signal, S _{1 is} the broadband in-band signal, and T _{1 is} the full-bandwidth initial training signal. See FIG. 6C, 6C shows an exemplary generation process of S _2.

In the above optional embodiment, before the signal transmission device determines the equalization coefficient of the radio frequency channel in step S101, after the signal transmission device generates a full-bandwidth training signal, the full-bandwidth training signal may be transmitted through the multiple radio frequency channels respectively. To obtain the full-bandwidth loopback signal, and compare the full-bandwidth training signal and the full-bandwidth loopback signal to determine the equalization coefficients corresponding to the plurality of radio frequency channels respectively.

S102. The signal transmission device uses the equalization coefficient to perform radio frequency channel correction on a broadband signal.

Specifically, the signal transmission device uses the determined equalization coefficients corresponding to the plurality of radio frequency channels to respectively correct the broadband signals transmitted by the plurality of radio frequency channels.

Here, the equalization coefficient determined by the signal transmission device can reflect both the performance impact of the RF channel on the in-band signal and the performance impact of the out-of-band signal. Combining the two, the equalization coefficient of the present application can also reflect the RF channel pair. Performance impact of transition band based signals. Because the wideband signal transmitted by the signal transmission device is not only based on the in-band frequency band, but also on the transition band, the signal transmission device uses the determined equalization coefficient to perform radio frequency correction on the wideband signal, not only on the part of the signal based on the in-band frequency band. In addition to the correction, some signals based on the transition band are corrected to ensure the correction performance of the edge subcarriers, thereby ensuring the performance of beamforming.

In a specific implementation manner, the signal transmission device may use an equalizer to correct the wideband signal by using Equation 7 and Equation 8:

S ′ ₁ (n) = S ₁ (n) * h _s1 (n) Equation 7

Wherein, S ₁ (n) is the wideband signal, S ′ ₁ (n) is a signal obtained by radio frequency correction of the wideband signal, and h _s1 (n) is an equalizer corresponding to the radio frequency channel. Impulse response, c _i is the determined equalization coefficient, and n is the number of sampling points. It can be understood that the signal transmission device corrects the broadband signals transmitted by each of the plurality of radio frequency channels through Equations 7 and 8, respectively, and the parameters in Equations 7 and 8 also correspond to each radio frequency channel, respectively.

Optionally, after the signal transmission device performs radio frequency channel correction on the wideband signal by using the determined equalization coefficient, the signal after correction may be further processed.

Specifically, when the signal transmission device is a transmitter, the signal transmission device may use a beamforming technique to transmit the corrected multiple signals to a receiver through a corresponding antenna, and the receiver receives the multiple signals. Here, because the signal transmission device corrects the radio frequency channel before transmitting the wideband signal, the influence of each radio frequency channel on the wideband signal is almost the same, and the effect of beamforming can be guaranteed.

Specifically, when the signal transmission device is a receiver, the signal transmission device first receives multiple signals transmitted by the transmitter using a beamforming technology through multiple antennas, and the multiple signals need to be transmitted from the antenna to the radio frequency channel. A signal processing module in a signal transmission device. The signal transmission device can use the determined equalization coefficient to perform radio frequency channel correction on the wideband signal. After the correction, the signal processing module can receive the corrected multi-path signals. Here, since the signal processing module receives a broadband signal that has been corrected by a radio frequency channel, that is, the influence of each radio frequency channel on the received broadband signal is almost the same, which can ensure the effect of beamforming.

The signal processing method of the present application is described in detail above. In order to better implement the present application, the related devices of the present application are described below.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a transmitter 70 provided by the present application. The transmitter 70 can be used to implement the signal processing method shown in FIG. 5. As shown in FIG. 7, the transmitter 70 may include multiple radio frequency channels 701, multiple antennas 702 corresponding to the multiple radio frequency channels, an equalization coefficient extraction module 703, and multiple equalizers 704. The radio frequency channel 701 is connected to the antenna 702, and the equalization coefficient extraction module 703 is connected to the equalizer 704. among them:

An equalization coefficient extraction module 703 is configured to determine equalization coefficients corresponding to a plurality of radio frequency channels, respectively.

Optionally, the transmitter 70 may further include a training signal generating module 705. The training signal generating module is configured to generate a full-bandwidth training signal according to a wideband in-band signal and an out-of-band signal. The training signal generating module 705 is further configured to generate the wideband out-of-band signal according to the full-band initial training signal and the wideband in-band signal. Here, the specific operation of the training signal generating module 705 for generating the full-bandwidth training signal may refer to the related description in the embodiment of FIG. 5, which is not described herein again.

Optionally, the training signal generating module 705 is further configured to transmit the generated full-bandwidth training signal through the radio frequency channel 701, and the equalization coefficient extraction module 703 can receive the full-bandwidth training signal after transmitting through the radio frequency channel 701. The equalization coefficient extraction module 703 can also be connected to the training signal generation module 705 and receive the full-bandwidth training signal directly sent by the training signal generation module 705. The full-bandwidth training signals are compared to determine the equalization coefficient. Here, for specific operations of the equalization coefficient extraction module 703 to determine the equalization coefficients, reference may be made to the related description in the embodiment of FIG. 5, and details are not described herein.

Optionally, the transmitter 70 may further include a plurality of switch selectors 706, and the plurality of switch selectors 706 are respectively connected to corresponding equalizers 704. In the present application, the transmitter 70 may include two signal processing processes, one is to determine an equalization coefficient, and the other is a broadband signal transmission after the equalization coefficient is determined.

When the transmitter 70 is used to determine the equalization coefficient, a switch selector 706 corresponding to a radio frequency channel that currently needs to determine the equalization coefficient is closed and connected to the training signal generating module 705. After that, the full-band training signal can be transmitted from the training signal generating module 704 through the radio frequency channel, and the equalization coefficient extraction module 703 can determine the balance of the radio frequency channel based on the full-band training signal that has not been transmitted through the radio frequency channel and the full-band training signal that has passed through the radio frequency channel. Coefficient and sends the determined equalization coefficient of the radio frequency channel to the equalizer 704 corresponding to the radio frequency channel.

When the transmitter 70 is used to transmit a broadband signal, the switch selector 706 is closed and connected to the corresponding transmit signal processing module 709.

Optionally, the transmitter 70 may further include a full-bandwidth training signal receiving module 707 (RX ref), multiple couplers 708 and a switch selector 711, a full-bandwidth training signal receiving module 707 and a switch selector 711, and an equalization coefficient extraction Modules 703 are connected. When the transmitter 70 is used to transmit a wideband signal, the coupler 708 is used to couple a full-bandwidth training signal via a radio frequency channel, and the coupled signal is transmitted to the switch selector 711. The switch selector 711 is configured to select a coupler 708 connected to a radio frequency channel whose current equalization coefficient is to be determined, receive a signal transmitted by the coupler 708, and transmit the signal to the full-bandwidth training signal receiving module 707.

The full-bandwidth training signal receiving module 707 is configured to receive the full-bandwidth training signal coupled by the coupler 708 and transmit the signal to the equalization coefficient extraction module 703.

Optionally, the transmitter 70 may further include a transmission signal processing module 709 and a broadband signal transmission module 710 (TX). During the transmission of the wideband signal, the transmission signal processing module 709 is used to generate an initial wideband signal, and the initial wideband signal can be sent to the wideband signal transmission module 710 via the corresponding radio frequency channel. Wideband signal.

The transmitter 70 shown in FIG. 7 is only an implementation manner of the embodiment of the present application. In practical applications, the transmitter 70 may further include more or fewer components, which is not limited herein.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a receiver 80 provided by the present application. The receiver 80 can be used to implement the signal processing method shown in FIG. 5. As shown in FIG. 8, the receiver 80 may include multiple radio frequency channels 801, multiple antennas 802 corresponding to the multiple radio frequency channels, an equalization coefficient extraction module 803, and an equalizer 804. The radio frequency channel 801 is connected to the antenna 802, and the equalization coefficient extraction module 803 is connected to the equalizer 804. among them:

An equalization coefficient extraction module 803 is configured to determine equalization coefficients corresponding to a plurality of radio frequency channels, respectively.

Optionally, the receiver 80 may further include a training signal generating module 805. The training signal generating module is configured to generate a full-bandwidth training signal according to a broadband in-band signal and an out-of-band signal. The training signal generating module 805 is further configured to generate the wideband out-of-band signal according to the full-band initial training signal and the wideband in-band signal. Here, the specific operation of the training signal generating module 805 for generating the full-bandwidth training signal can refer to the related description in the embodiment of FIG. 5, which is not repeated here.

Optionally, the training signal generating module 804 is further configured to transmit the generated full-bandwidth training signal through the radio frequency channel 801, and the equalization coefficient extraction module 803 can receive the full-bandwidth training signal after transmitting through the radio frequency channel 801. The equalization coefficient extraction module 803 may also be connected to the training signal generation module 804 and receive the full-bandwidth training signals directly sent by the training signal generation module 804. The full-bandwidth training signals are compared to determine the equalization coefficient. Here, the specific operation of the equalization coefficient extraction module 803 for determining the equalization coefficient may refer to the related description in the embodiment of FIG. 5, which is not repeated here.

Optionally, the receiver 80 may further include multiple switch selectors 806, switch selectors 811, and multiple switch selectors 806 are connected to the corresponding equalizers 804 and switch selectors 803, respectively. In this application, the receiver 80 may include two signal processing processes, one is to determine the equalization coefficient, and the other is to receive the broadband signal after the equalization coefficient is determined.

When the receiver 80 is used to determine the equalization coefficient, the switch selector 811 selects a switch selector 806 corresponding to a radio frequency channel that currently needs to determine the equalization coefficient. After that, the full-band training signal may be transmitted from the training signal generating module 805 to the equalization coefficient extraction module 803 via the radio frequency channel. The equalization coefficient extraction module 803 may transmit the full-bandwidth training signal not transmitted through the radio-frequency channel and the full-bandwidth training signal through the radio-frequency channel. To determine an equalization coefficient of the radio frequency channel, and send the determined equalization coefficient of the radio frequency channel to an equalizer 804 corresponding to the radio frequency channel.

When the receiver 80 is used to receive a broadband signal, the switch selector 806 is closed and connected to the corresponding received signal processing module 709.

Optionally, the receiver 80 may further include a full-bandwidth training signal receiving module 807 (TX ref), a power divider 812, and multiple couplers 808, a full-bandwidth training signal receiving module 807 and a power divider 812, and training signal generation. Modules 805 are connected. The full-bandwidth training signal receiving module 807 is configured to receive the full-bandwidth training signal sent by the training signal generating module 805 and transmit it to the power divider 812. The power-band divider 812 divides the full-bandwidth training signal into multiple channels and transmits them to multiple channels. Couplers 808, and the full-bandwidth training signals coupled by the couplers 808 are transmitted via a radio frequency channel. When the receiver 80 is used to receive a broadband signal, the equalization coefficient extraction module 803 may receive a full-bandwidth training signal after being transmitted through a radio frequency channel.

Optionally, the receiver 80 may further include a receiving signal processing module 809 and a broadband signal receiving module 810 (RX). In the process of receiving a wideband signal, the wideband signal receiving module 810 (RX) is used to receive an initial wideband signal transmitted by another device through the antenna 802, and the initial wideband signal can be sent to the receiving signal processing module 809 through a radio frequency channel.

The receiver 80 shown in FIG. 8 is only an implementation manner of the embodiment of the present application. In practical applications, the receiver 80 may further include more or fewer components, which is not limited herein.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of a network device 90 provided in this application. As shown in FIG. 9, the network device 90 may include one or more network device processors 901, a memory 902, a communication interface 903, a transmitter 905, a receiver 906, a switch selector 907, and an antenna 908. These components may be connected through the bus 904 or in other manners, and FIG. 9 takes the connection through the bus as an example. among them:

The communication interface 903 may be used for the network device 90 to communicate with other communication devices, such as a terminal and a relay node. Specifically, the communication interface 903 may be a wired communication interface, such as a LAN interface.

In some embodiments of the present application, the transmitter 905 and the receiver 906. The transmitter 905 may be used to perform transmission processing on a signal output by the network device processor 901, and the receiver 906 may be used to receive a signal. In the network device 90, the number of the transmitters 905 and the receivers 906 may be one or more.

The memory 902 is coupled to the network device processor 901 and is configured to store various software programs and / or multiple sets of instructions. Specifically, the memory 902 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices.

The memory 902 may store an operating system (hereinafter referred to as a system), such as an embedded operating system such as uCOS, VxWorks, and RTLinux. The memory 902 may also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, and the like.

In the embodiment of the present application, the network device processor 901 may be configured to read and execute computer-readable instructions. Specifically, the network device processor 901 may be used to call a program stored in the memory 902, for example, a program for implementing a signal processing method provided by one or more embodiments of the present application on the network device 90 side, and execute instructions included in the program .

Optionally, the transmitter 905 in the network device 90 may be a transmitter 70 shown in FIG. 7.

Optionally, the receiver 906 in the network device 90 may be the receiver 80 shown in FIG. 8.

The network device 90 may be implemented as a base transceiver station, a wireless transceiver, a basic service set, an extended service set, NodeB, eNodeB, gNodeB, access point, and so on.

The network device shown in FIG. 9 is only an implementation manner of the embodiment of the present application. In actual applications, the network device may further include more or fewer components, which is not limited herein.

Referring to FIG. 10, FIG. 10 is a functional block diagram of a signal transmission device 100 provided in the present application. As shown in the figure, the signal transmission device 100 may include a determining unit 1001 and a correcting unit 1002, where:

A determining unit 1001 is configured to determine equalization coefficients corresponding to a plurality of radio frequency channels respectively; the radio frequency channel is used to transmit a broadband signal obtained by multi-carrier splicing or carrier aggregation;

The correction unit 1002 is configured to correct a radio frequency channel of a broadband signal by using an equalization coefficient; the equalization coefficient reflects a performance influence of the radio frequency channel on a broadband in-band signal and a performance influence on a broadband out-of-band signal.

Optionally, the determining unit 1001 is specifically configured to determine the equalization coefficients corresponding to the multiple radio frequency channels according to the full bandwidth training signal and the full bandwidth loopback signal; the full bandwidth loopback signal is obtained by transmitting the full bandwidth training signal through the radio frequency channel.

Optionally, the signal transmission device 100 may further include a training signal generating unit 1003, configured to generate a full-bandwidth training signal according to a broadband in-band signal and an out-of-band signal.

Optionally, the training signal generating unit 1003 is further configured to generate a broadband out-of-band signal according to the full-band initial training signal and the broadband in-band signal.

Optionally, the training signal generating unit 1003 is specifically configured to generate a full-bandwidth training signal according to a broadband in-band signal, an out-band signal, and an out-band signal gain control factor.

Optionally, the training signal generating unit 1003 is further configured to transmit a full-bandwidth training signal through a radio frequency channel; the determining unit 1001 is further configured to receive a full-bandwidth loopback signal.

It can be understood that, for specific implementation of each functional unit included in the signal transmission apparatus 100, reference may be made to the related description of the foregoing embodiment in FIG. 5, and details are not described herein again.

In summary, when implementing the technical solution provided in the present application, when performing radio frequency correction on a wideband signal, the correction performance of edge subcarriers can be guaranteed, thereby ensuring the performance of beamforming.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, a computer, a server, or a data center. Transmission by wire (for example, coaxial cable, optical fiber, digital subscriber line) or wireless (for example, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes one or more available medium integration. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk)).

Claims

A signal processing method, comprising:

The signal transmission device determines equalization coefficients corresponding to a plurality of radio frequency channels respectively; the radio frequency channels are used to transmit a broadband signal, and the broadband is obtained by multi-carrier splicing or carrier aggregation;

The signal transmission device uses the equalization coefficient to perform radio frequency channel correction on the wideband signal; the equalization coefficient reflects the performance impact of the radio frequency channel on the broadband in-band signal and the broadband out-of-band signal Performance impact.
The method according to claim 1, wherein:

The signal transmission device determining an equalization coefficient corresponding to each of a plurality of radio frequency channels includes:

The signal transmission device determines an equalization coefficient corresponding to each of a plurality of radio frequency channels according to a full bandwidth training signal and a full bandwidth loopback signal; the full bandwidth loopback signal is obtained by transmitting the full bandwidth training signal through the radio frequency channel. .
The method according to claim 2, wherein:

Before the determining the equalization coefficients corresponding to the plurality of radio frequency channels, the method further includes:

The signal transmission device generates the full-bandwidth training signal according to the broadband in-band signal and out-of-band signal.
The method according to claim 3, wherein:

Before the signal transmission device generates the full-bandwidth training signal according to the broadband in-band signal and out-of-band signal, the method further includes:

The signal transmission device generates the broadband out-of-band signal according to the full-band initial training signal and the broadband in-band signal.
The method according to claim 3 or 4, characterized in that:

The signal transmission device generating the full-bandwidth training signal according to the broadband in-band signal and out-band signal includes:

The signal transmission device generates a full-bandwidth training signal according to the broadband in-band signal, out-band signal, and out-band signal gain control factor.
The method according to any one of claims 2-5, wherein:

Before the determining the equalization coefficients corresponding to the plurality of radio frequency channels, the method further includes:

The signal transmission device transmits the full-bandwidth training signal through the radio frequency channel to obtain the full-bandwidth loopback signal.
The method according to any one of claims 2-6, wherein:

The signal transmission device determines, according to the full-bandwidth training signal and the full-bandwidth loopback signal, the equalization coefficients corresponding to the multiple radio frequency channels, respectively, including:

The signal transmission device determines the respective equalization coefficients of the plurality of radio frequency channels by the following formula:

Among them, J is the cost function, T 2 (n) is the full-bandwidth training signal, T ′ 2 (ni) is the full-bandwidth loopback signal, c i is the equalization coefficient, n is the number of sampling points, N is the total number of sampling points, and M is The number of taps of the equalizer corresponding to the radio frequency channel.
The method according to any one of claims 1-7, wherein:

The signal transmission device using the equalization coefficient to perform radio frequency channel correction on the broadband signal includes:

The signal transmission device performs radio frequency channel correction on the broadband signal by the following formula:

S ′ 1 (n) = S 1 (n) * h s1 (n)

Wherein, S 1 (n) is the wideband signal, S ′ 1 (n) is a signal obtained by radio frequency correction of the wideband signal, and h s1 (n) is an equalizer corresponding to the radio frequency channel. For impulse response, c i is the equalization coefficient and n is the number of sampling points.
The method according to any one of claims 1 to 8, wherein the broadband signal is a full-band signal or a molecular band signal.
The method according to any one of claims 1-9, wherein the performance impact comprises at least one of a magnitude impact, a phase impact, or a delay impact, or a plurality thereof.
The method according to any one of claims 1 to 10, wherein the signal transmission device is a receiver or a transmitter.
A signal processing device, comprising: a radio frequency channel, an antenna, an equalization coefficient extraction module, and an equalizer, the radio frequency channel is connected to the antenna, and the equalizer is connected to the equalization coefficient extraction module, wherein:

The equalization coefficient extraction module is configured to determine equalization coefficients corresponding to a plurality of radio frequency channels respectively;

The radio frequency channel is used to transmit a broadband signal, and the broadband is obtained by multi-carrier splicing or carrier aggregation;

The equalizer is configured to perform a radio frequency channel correction on the wideband signal by using the equalization coefficient; the equalization coefficient reflects a performance influence of the radio frequency channel on the broadband in-band signal and the bandwidth of the broadband signal. Performance impact of external signals;

The antenna is used for transmitting the broadband signal.
The device according to claim 12, wherein:

The equalization coefficient extraction module is specifically configured to determine equalization coefficients corresponding to a plurality of radio frequency channels respectively according to a full bandwidth training signal and a full bandwidth loopback signal; the full bandwidth loopback signal is passed by the full bandwidth training signal through the The transmission of the RF channel is obtained.
The apparatus according to claim 13, further comprising: a training signal generating module, configured to generate the full-bandwidth training signal according to the broadband in-band signal and out-of-band signal.
The apparatus according to claim 14, wherein the training signal generating module is further configured to generate the broadband out-of-band signal according to a full-band initial training signal and the broadband in-band signal.
The apparatus according to claim 14 or 15, wherein the training signal generating module is specifically configured to generate the full-bandwidth training according to the broadband in-band signal, out-band signal, and out-band signal gain control factor. signal.
The device according to any one of claims 13 to 16, wherein:

The training signal generating module is further configured to transmit the full-bandwidth training signal through the radio frequency channel;

The equalization coefficient extraction module is further configured to receive the full-bandwidth loopback signal.
The device according to any one of claims 13-17, wherein:

The equalization coefficient extraction module is specifically configured to determine the equalization coefficients corresponding to the plurality of radio frequency channels respectively by the following formula:

Among them, J is the cost function, T 2 (n) is the full-bandwidth training signal, T ′ 2 (ni) is the full-bandwidth loopback signal, c i is the equalization coefficient, n is the number of sampling points, N is the total number of sampling points, and M is The number of taps of the equalizer corresponding to the radio frequency channel.
The device according to any one of claims 12 to 18, wherein:

The equalizer is specifically configured to perform radio frequency channel correction on the broadband signal by the following formula:

S ′ 1 (n) = S 1 (n) * h s1 (n)

Wherein, S 1 (n) is the wideband signal, S ′ 1 (n) is a signal obtained by radio frequency correction of the wideband signal, and h s1 (n) is an equalizer corresponding to the radio frequency channel. For impulse response, c i is the equalization coefficient and n is the number of sampling points.
The device according to any one of claims 12 to 19, wherein the broadband signal is a full-band signal or a molecular band signal.
The device according to any one of claims 12 to 20, wherein the performance impact includes at least one or a plurality of amplitude impact, phase impact, or delay impact.
The device according to any one of claims 12 to 21, wherein the signal transmission device is a receiver or a transmitter.
A signal transmission device, comprising: a determining unit and a correction unit, wherein:

The determining unit is configured to determine equalization coefficients corresponding to a plurality of radio frequency channels respectively; the radio frequency channel is used to transmit a broadband signal, and the broadband is obtained by multi-carrier splicing or carrier aggregation;

The correction unit is configured to perform a radio frequency channel correction on the broadband signal by using the equalization coefficient; the equalization coefficient reflects a performance influence of the radio frequency channel on the broadband in-band signal and the bandwidth of the broadband signal. Performance impact of external signals.
The apparatus according to claim 23, wherein the determining unit is specifically configured to determine equalization coefficients corresponding to a plurality of radio frequency channels respectively according to a full-bandwidth training signal and a full-bandwidth loopback signal; and the full-bandwidth loopback signal It is obtained by transmitting the full-bandwidth training signal through the radio frequency channel.
The apparatus according to claim 24, further comprising: a training signal generating unit, configured to generate the full-bandwidth training signal according to the broadband in-band signal and out-of-band signal.
The apparatus according to claim 25, wherein the training signal generating unit is further configured to generate the broadband out-of-band signal according to a full-band initial training signal and the broadband in-band signal.
The apparatus according to claim 25 or 26, wherein the training signal generating unit is specifically configured to generate the full-bandwidth training according to the broadband in-band signal, out-of-band signal, and out-of-band signal gain control factor signal.
The device according to any one of claims 24-27, wherein:

The training signal generating unit is further configured to transmit the full-bandwidth training signal through the radio frequency channel;

The determining unit is further configured to receive the full-bandwidth loopback signal.
The device according to any one of claims 24-28, wherein:

The determining unit is specifically configured to determine the equalization coefficients corresponding to the plurality of radio frequency channels respectively by the following formula:

Among them, J is the cost function, T 2 (n) is the full-bandwidth training signal, T ′ 2 (ni) is the full-bandwidth loopback signal, c i is the equalization coefficient, n is the number of sampling points, N is the total number of sampling points, and M is The number of taps of the equalizer corresponding to the radio frequency channel.
The device according to any one of claims 23-29, wherein:

The correction unit is specifically configured to perform radio frequency channel correction on the broadband signal by using the following formula:

S ′ 1 (n) = S 1 (n) * h s1 (n)

Wherein, S 1 (n) is the wideband signal, S ′ 1 (n) is a signal obtained by radio frequency correction of the wideband signal, and h s1 (n) is an equalizer corresponding to the radio frequency channel. For impulse response, c i is the equalization coefficient and n is the number of sampling points.
The device according to any one of claims 23 to 30, wherein the broadband signal is a full-band signal or a molecular band signal.
The device according to any one of claims 23 to 31, wherein the performance impact includes at least one or a plurality of amplitude impact, phase impact, or delay impact.
The device according to any one of claims 23 to 32, wherein the signal transmission device is a receiver or a transmitter.