WO2024082884A1 - Procédé de compensation de signal à large bande, appareil, dispositif et support de stockage associés - Google Patents

Procédé de compensation de signal à large bande, appareil, dispositif et support de stockage associés Download PDF

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WO2024082884A1
WO2024082884A1 PCT/CN2023/118783 CN2023118783W WO2024082884A1 WO 2024082884 A1 WO2024082884 A1 WO 2024082884A1 CN 2023118783 W CN2023118783 W CN 2023118783W WO 2024082884 A1 WO2024082884 A1 WO 2024082884A1
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subcarrier
signal
state value
subcarrier signal
signals
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PCT/CN2023/118783
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English (en)
Chinese (zh)
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邢鹤申
王蕾
张作锋
倪晶磊
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中兴通讯股份有限公司
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Publication of WO2024082884A1 publication Critical patent/WO2024082884A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a compensation method, device, equipment and storage medium for broadband signals.
  • Gallium nitride (GaN) power amplifiers are widely used in base stations in the field of communications due to their high efficiency, high power density and wide bandwidth.
  • GaN power amplifiers have unique electron capture characteristics due to the device material.
  • the electron capture characteristics of GaN power amplifiers are the phenomenon that the static current of GaN power amplifiers slowly decreases under the impulse of a periodic pulse signal.
  • the electron capture characteristics of GaN power amplifiers generally stabilize in a few milliseconds, which will cause the nonlinear distortion of GaN power amplifiers to show a long-term memory effect.
  • an embodiment of the present disclosure provides a method for compensating a broadband signal, the method comprising:
  • the multiple subcarrier signals are compensated to obtain multiple compensated subcarrier signals;
  • the multiple compensated subcarrier signals are combined to obtain a compensated broadband signal.
  • the above-mentioned compensating multiple subcarrier signals based on the power and state value of each subcarrier signal in the multiple subcarrier signals to obtain multiple compensated subcarrier signals includes: determining an index address according to the power and state value of each subcarrier signal in the multiple subcarrier signals; determining a compensation value corresponding to each subcarrier signal in the multiple subcarrier signals based on the index address; and compensating each subcarrier signal in the multiple subcarrier signals with the compensation value corresponding to the subcarrier signal to obtain a compensated subcarrier signal.
  • determining the index address according to the power and state value of each subcarrier signal in the multiple subcarrier signals includes: determining a first index value according to the power of each subcarrier signal in the multiple subcarrier signals; determining a second index value according to the state value of each subcarrier signal in the multiple subcarrier signals; and generating the index address based on the first index value and the second index value.
  • the first index value is equal to a weighted sum of the powers of each subcarrier signal in the plurality of subcarrier signals
  • the second index value is equal to a weighted sum of the state values of each subcarrier signal in the plurality of subcarrier signals.
  • the above-mentioned determining the compensation value corresponding to each subcarrier signal in the multiple subcarrier signals based on the index address includes: for each subcarrier signal in the multiple subcarrier signals, based on the index address, searching for the compensation value corresponding to the subcarrier signal from a lookup table corresponding to the frequency point where the subcarrier signal is located.
  • the above-mentioned obtaining the power and state value of each subcarrier signal in the multiple subcarrier signals includes: obtaining the power of each subcarrier signal in the multiple subcarrier signals; for each subcarrier signal in the multiple subcarrier signals, determining the state value of the subcarrier signal according to the power of the subcarrier signal.
  • the above-mentioned determining the state value of the subcarrier signal according to the power of the subcarrier signal includes: The power of the subcarrier signal is modulo calculated to obtain the initial state value of the subcarrier signal; when the initial state value of the subcarrier signal is greater than or equal to the state value threshold, the difference between the initial state value of the subcarrier signal and the first preset state value is used as the state value of the subcarrier signal; or, when the initial state value of the subcarrier signal is less than the state value threshold, the sum of the initial state value of the subcarrier signal and the second preset state value is used as the state value of the subcarrier signal.
  • an embodiment of the present disclosure provides a compensation device.
  • the compensation device includes: a frequency decomposition module, which is used to decompose a broadband signal into multiple subcarrier signals.
  • the signal compensation module is used to obtain the power and state value of each subcarrier signal in the multiple subcarrier signals, and the state value of the subcarrier signal is used to characterize the long-term memory effect state of the frequency point where the subcarrier signal is located.
  • the signal compensation module is also used to compensate the multiple subcarrier signals based on the power and state value of each subcarrier signal in the multiple subcarrier signals to obtain multiple compensated subcarrier signals.
  • the merging unit is used to merge a plurality of compensated subcarrier signals to obtain a compensated width signal.
  • an embodiment of the present disclosure provides an electronic device.
  • the electronic device includes a memory and a processor; the memory and the processor are coupled; the memory is used to store computer program code, and the computer program code includes computer instructions.
  • the processor executes the computer instructions, the electronic device executes the method provided in the first aspect above.
  • an embodiment of the present disclosure provides a computer-readable storage medium.
  • the computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer executes the method provided in the first aspect.
  • an embodiment of the present disclosure provides a computer program product comprising computer instructions, which, when executed on a computer, enables the computer to execute the method provided in the first aspect.
  • FIG1 is a schematic diagram of a filter module according to some embodiments.
  • FIG2 is a schematic flow chart of a method for compensating a broadband signal according to some embodiments
  • FIG3 is a schematic flow chart of another method for compensating a broadband signal according to some embodiments.
  • FIG4 is a schematic flow chart of another method for compensating a broadband signal according to some embodiments.
  • FIG5 is a schematic flow chart of another method for compensating a broadband signal according to some embodiments.
  • FIG6 is a schematic flow chart of a lookup table generation process according to some embodiments.
  • FIG7 is a schematic diagram of an original broadband signal and a processed broadband signal according to some embodiments.
  • FIG8 is a schematic diagram of the power of a subcarrier signal according to some embodiments.
  • FIG9 is a schematic diagram of a state value of a subcarrier signal according to some embodiments.
  • FIG10 is a schematic diagram of a compensated broadband signal according to some embodiments.
  • FIG11 is a schematic diagram of another compensated broadband signal according to some embodiments.
  • FIG12 is a schematic structural diagram of a compensation device according to some embodiments.
  • FIG13 is a schematic diagram of the structure of a state value generating module according to some embodiments.
  • FIG14 is a schematic diagram of the structure of a combined compensation module and a merging module according to some embodiments.
  • FIG. 15 is a schematic diagram of the structure of an electronic device according to some embodiments.
  • words such as “exemplarily” or “for example” are used to indicate examples, illustrations or explanations. Any embodiment or design described as “exemplarily” or “for example” in the embodiments of the present disclosure should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as “exemplarily” or “for example” is intended to present related concepts in a detailed manner.
  • the 5G communication protocol came into being.
  • the long-term memory effect of GaN power amplifiers will affect the signal demodulation under the 5G communication protocol, thereby deteriorating downlink data transmission.
  • the power and signal bandwidth change dramatically at the same time.
  • the current compensation method for the long-term memory effect of GaN power amplifiers has a certain compensation effect for the scenario of the long-term memory effect stimulated by power mutation, but it is not applicable to the scenario where the signal bandwidth changes dramatically.
  • the embodiment of the present disclosure provides a method for compensating a broadband signal. After acquiring a broadband signal, each subcarrier signal is compensated by the power and state value of each subcarrier signal included in the broadband signal, and then a plurality of compensated subcarrier signals are combined to obtain a compensated broadband signal, so that the compensated broadband signal can be applied to a scenario where the signal bandwidth changes dramatically.
  • PA Power amplifier
  • Baseband signal The original electrical signal that has not been modulated (spectrum shifting and transformation) and is sent by the information source (information source, also known as the transmitter).
  • the original electrical signal is characterized by a low frequency, a signal spectrum starting near zero frequency, and a low-pass form.
  • the baseband signal can be divided into digital baseband signals and analog baseband signals (correspondingly, the information source is also divided into digital information source and analog information source).
  • the baseband signal is to directly represent the digital signal 1 or 0 with two different voltages, and then send it to the line for transmission.
  • Broadband signal is a frequency-division multiplexed analog signal formed by modulating the above baseband signal.
  • the active antenna unit is the main equipment of the 5G base station. From the perspective of architecture, it integrates the remote radio unit (RRU) and antenna unit (AU) of the 4G era. Multiple RF transceiver units are integrated in the AAU.
  • RRU separates the baseband unit and the radio frequency unit of the base station, and transmits the baseband signal between the baseband unit and the radio frequency unit using light or the Internet, so that the signal-to-noise ratio can reach the best state.
  • RRU can include 4 modules: digital intermediate frequency module, transceiver module, power amplifier module and filter module.
  • the frequency module is used for modulation and demodulation, digital up and down conversion, A/D conversion, etc. of optical transmission; the transceiver module completes the conversion of intermediate frequency signal to radio frequency signal; and then the radio frequency signal is transmitted through the antenna port after passing through the power amplifier module and the filter module.
  • the above-mentioned filtering module can be called a frequency decomposition module.
  • the filtering module can be composed of multiple groups of finite impulse response (FIR) filters.
  • the filtering module can be constructed in a variety of ways, for example, it can be directly designed according to a low-pass filter or designed by combining a low-pass filter and a high-pass filter.
  • Figure 1 is a schematic diagram of the composition of a filtering module according to an exemplary embodiment. As shown in Figure 1, the filtering module includes multiple FIR filters, and N is a positive integer.
  • Frequency point A frequency band is a section of frequency, which has a range, and a frequency point is a frequency point on the frequency band.
  • Base station is used to provide wireless access services for terminal devices.
  • each base station provides a service coverage area (also called a cell). Terminal devices that enter this area can communicate with the base station through wireless signals to receive the wireless access services provided by the base station.
  • the service coverage areas of base stations may overlap, and terminal devices in the overlapping areas can receive wireless signals from multiple base stations.
  • the base station can be any of an evolution node B (eNB), a next generation node B (gNB), a transmission receive point (TRP), a transmission point (TP), and some other access nodes.
  • the base station can be divided into a macro base station for providing macro cells (Macro cells), a micro base station for providing micro cells (Pico cells), and a femto base station for providing femto cells (Femto cells).
  • future base stations may also adopt other names.
  • FIG2 is a flow chart of a method for compensating a broadband signal according to an exemplary embodiment.
  • the method is applied to a compensation device, which may be the above-mentioned base station, for example, the above-mentioned AAU, or the above-mentioned RRU.
  • the method includes the following steps.
  • the compensation device may decompose the broadband signal into multiple subcarrier signals based on the frequency points through the above-mentioned frequency decomposition module.
  • a frequency point is a frequency point on a frequency band, and a frequency point corresponds to a subcarrier signal, so the broadband signal can be decomposed into multiple subcarrier signals based on the frequency point.
  • the frequency decomposition module can be in the form of a combined filter that combines a low-pass filter and a high-pass filter. It is understandable that the effect of frequency domain decomposition by the combined filter is better.
  • S102 Obtain power and state value of each subcarrier signal among multiple subcarrier signals.
  • the power of each subcarrier signal can be obtained. Then, the compensation device can obtain the state value of each subcarrier signal according to the power of each subcarrier signal.
  • the state value of a subcarrier signal is used to characterize the long-term memory effect state of the frequency point where the subcarrier signal is located. For a description of how to obtain the state value of each subcarrier signal according to the power of each subcarrier signal, refer to the description of S1022 below, which will not be repeated here.
  • S103 Compensate the multiple subcarrier signals based on the power and state value of each subcarrier signal in the multiple subcarrier signals to obtain multiple compensated subcarrier signals.
  • S103 may be implemented as the following steps, for example.
  • a lookup table corresponding to the frequency point of each subcarrier signal is pre-stored in the compensation device, and one lookup table includes a correspondence between multiple compensation values and multiple index addresses.
  • the compensation values corresponding to the same index address in the lookup tables corresponding to different frequency points may be different.
  • the broadband signal includes multiple subcarrier signals.
  • the lookup table corresponding to the frequency point where each subcarrier signal is located is a multi-dimensional lookup table.
  • S1031 may be implemented as the following steps, for example.
  • Step A1 Determine a first index value according to the power of each subcarrier signal among a plurality of subcarrier signals.
  • the first index value is equal to a weighted sum of the powers of each subcarrier signal in the plurality of subcarrier signals.
  • the relationship between the power of each subcarrier signal in the plurality of subcarrier signals and the first index value may be as shown in the following formula (1).
  • IndxA is the first index value
  • N is the number of multiple subcarrier signals
  • ai is the preset power weight of the i-th subcarrier signal in the N subcarrier signals
  • Ai is the power of the i-th subcarrier signal in the N subcarrier signals.
  • the preset power weight of each subcarrier signal can be preset by a network administrator.
  • the first index value may be determined based on the power and bit width of each subcarrier signal in the plurality of subcarrier signals.
  • the relationship between the power and bit width of each subcarrier signal in the plurality of subcarrier signals and the first index value may be as shown in the following formula (2).
  • Bk is the bit width of the kth subcarrier signal among the N subcarrier signals.
  • Step A2 Determine a second index value according to a state value of each subcarrier signal among the multiple subcarrier signals.
  • the second index value is equal to a weighted sum of state values of each carrier signal in the plurality of subcarrier signals.
  • the relationship between the state value of each subcarrier signal in the plurality of subcarrier signals and the second index value may be as shown in the following formula (3).
  • IndxS is the second index value
  • Si is the preset power weight of the i-th subcarrier signal among the N subcarrier signals
  • Si is the state value of the i-th subcarrier signal among the N subcarrier signals.
  • the preset state value weight of each subcarrier signal can be preset by a network administrator.
  • Step A3 Generate an index address based on the first index value and the second index value.
  • the index address generated based on the first index value and the second index value may be (IndxA, IndxS).
  • S1032 Determine a compensation value corresponding to each subcarrier signal in a plurality of subcarrier signals based on the index address.
  • a compensation value corresponding to the subcarrier signal may be found in a lookup table of a frequency point where the subcarrier signal is located based on an index address.
  • the compensation value corresponding to each subcarrier signal may be pre-set by a network administrator based on experience, or may be obtained after training based on a machine learning algorithm, which is not limited in this regard in the embodiments of the present disclosure.
  • S1033 For each subcarrier signal among the multiple subcarrier signals, compensate the subcarrier signal with a compensation value corresponding to the subcarrier signal to obtain a compensated subcarrier signal.
  • the subcarrier signal may be compensated based on the compensation value of the subcarrier signal to obtain a compensated subcarrier signal.
  • the power of the subcarrier signal may be multiplied by the compensation value of the subcarrier signal to obtain the subcarrier signal after the subcarrier signal is compensated.
  • S104 Combine multiple compensated subcarrier signals to obtain a compensated broadband signal.
  • the multiple subcarrier signals are obtained by decomposing the broadband signal.
  • the multiple compensated subcarrier signals may be combined to obtain the compensated broadband signal.
  • a plurality of compensated subcarrier signals may be accumulated to obtain a compensated broadband signal.
  • At least the following beneficial effects are brought about: after obtaining a broadband signal, the broadband signal is decomposed, and then the power and state values of each subcarrier signal included in the broadband signal are compensated for each subcarrier signal. Since the state value of a subcarrier signal is used to characterize the long-term memory effect state of the frequency point where a subcarrier signal is located, and the long-term memory effect state of the GaN power amplifier is stimulated by the long-term memory effect state of the frequency point.
  • the compensated broadband signal can meet the scenario where the signal bandwidth changes dramatically under the 5G communication protocol, and the power of a subcarrier signal is introduced in the process of compensating a subcarrier signal, that is, the compensated broadband signal can meet the scenario where the power and bandwidth change dramatically at the same time under the 5G communication protocol.
  • the above S102 may be implemented as the following steps, for example.
  • the compensation device when the compensation device decomposes the broadband signal into multiple subcarrier signals, the power of each subcarrier signal in the multiple subcarrier signals can be acquired.
  • a state value of a subcarrier signal may be obtained based on the power of a subcarrier signal.
  • S1022 may be implemented as the following steps, for example.
  • the power modulus value of the subcarrier signal is calculated, that is, the absolute value of the power of the subcarrier signal is used as the initial state value of the subcarrier signal.
  • the initial state value of the subcarrier signal may be compared with a state value threshold. If the initial state value of the subcarrier signal is greater than or equal to the state value threshold, it means that the initial state value of the subcarrier signal is high, and the initial state value of the subcarrier signal needs to be weakened.
  • the initial state value of the subcarrier signal may be subtracted from the first preset state value, and then the difference between the initial state value of the subcarrier signal and the first preset state value may be used as the state value of the subcarrier signal.
  • the state value threshold may be preset by a network administrator, and the state value of a subcarrier signal determined this time may be used as the state value threshold of the subcarrier signal at the frequency point where the subcarrier signal is located when compensation is performed next time.
  • the initial state value of the subcarrier signal is less than the state value threshold, it means that the initial state value of the subcarrier signal is small, and the initial state value of the subcarrier signal needs to be enhanced.
  • the initial state value of the subcarrier signal may be added to the second preset state value, and then the sum of the initial state value of the subcarrier signal and the second preset state value may be used as the state value of the subcarrier signal.
  • Ak+1 is the state value of the kth subcarrier signal among multiple subcarrier signals
  • Ak is the initial state value of the kth subcarrier signal among multiple subcarrier signals
  • ⁇ discharge is the above-mentioned first preset state value
  • P k+1 is the above-mentioned state value threshold
  • ⁇ charge is the above-mentioned second preset state value.
  • the first preset state value and the second preset state value may be preset by a network administrator based on experience, or may be obtained by the compensation device by searching for a preset corresponding relationship.
  • the compensation device pre-stores a first corresponding relationship and a second corresponding relationship, wherein the first corresponding relationship includes a corresponding relationship between a plurality of state value differences and a plurality of first preset state values, and the second corresponding relationship includes a corresponding relationship between a plurality of state value differences and a plurality of second preset state values.
  • the compensation device may use the state value difference between the initial state value of the subcarrier signal and the state value threshold as an index, traverse the above first correspondence, and find out the first preset state value corresponding to the state value difference between the initial state value of the subcarrier signal and the state value threshold from the first correspondence. After finding out the first preset state value corresponding to the state value difference between the initial state value of the subcarrier signal and the state value threshold, the difference between the initial state value of the subcarrier signal and the first preset state value is used as the state value of the subcarrier signal.
  • the compensation device may use the state value difference between the initial state value of the subcarrier signal and the state value threshold as an index, traverse the second corresponding relationship, and find out the second preset state value corresponding to the state value difference between the initial state value of the subcarrier signal and the state value threshold from the second corresponding relationship. After finding out the second preset state value corresponding to the state value difference between the initial state value of the subcarrier signal and the state value threshold, the sum of the initial state value of the subcarrier signal and the second preset state value is used as the state value of the subcarrier signal.
  • a broadband signal compensation method provided by the embodiment of the present disclosure also involves a process of generating a lookup table corresponding to each frequency point. As shown in FIG. 6 , the generation process includes the following steps.
  • the initialization of the compensation device parameters mainly determines the initial parameters of the compensation device according to the initial state of the power amplifier. The following parameters need to be determined.
  • Configuring the index combination method mainly determines the index combination method of the above-mentioned IndxA and IndxS.
  • the index combination method needs to be combined with the following parameter training to determine the replication degree of the overall broadband modeling solution. It is understandable that a simple index combination can reduce the modeling complexity, but affect the final compensation effect; a complex index combination will increase the modeling complexity, but can achieve better compensation effects.
  • training data collection is to provide training samples for subsequent multi-dimensional lookup table parameter extraction.
  • Dynamic business acquisition is to obtain training data by collecting actual data of dynamic business scenarios, effectively identifying and retaining them.
  • Actively initiating training sequences can generate training data that can traverse various index dimensions, and perform data collection and parameter extraction while ensuring the data quality of training data. In terms of data validity, actively initiating training data sequences is more reasonable.
  • the multidimensional lookup table is a multidimensional lookup table corresponding to the frequency points where the subcarrier signals described in S1031 are located.
  • the parameter extraction of the multidimensional lookup table is mainly divided into two steps, namely, the coefficient extraction of the multidimensional parameters and the generation of the multidimensional lookup table.
  • the coefficient generation of multidimensional parameters mainly adopts the least square method to extract coefficients, that is, constructing the following formula (5).
  • n and m are both constants
  • p ij is used to represent the ijth state value threshold
  • X is the input of all independent variables, that is, the input of all subcarrier signals
  • Z is the output of all independent variables, that is, the output of all subcarrier signals
  • p and q are coefficients of the multidimensional lookup table.
  • H is used to represent the conjugate transpose.
  • the construction of a multidimensional lookup table is based on a multidimensional index and the corresponding table value is calculated by the index value to construct the multidimensional lookup table.
  • a broadband signal compensation method provided by an embodiment of the present disclosure will be described below with reference to examples.
  • FIG7 shows an original broadband signal and a broadband signal after digital pre-distortion (DPD) processing.
  • DPD digital pre-distortion
  • the broadband signal of the GaN power amplifier after DPD correction still has a large distortion in the right frequency band.
  • the relatively smooth curve shown in Figure 7 represents the original broadband signal, and the relatively curved curve represents the broadband signal after DPD correction.
  • the compensation device uses the above-mentioned combined filter to perform dual-frequency division on the original broadband signal through the spectrum, and takes the decomposition of the original broadband signal into two subcarrier signals as an example for explanation, and the output effect of the combined filter is shown in Figure 8.
  • S is the power of the original broadband signal
  • S1 is the power of the first subcarrier signal after the original broadband signal is decomposed by the combined filter
  • S2 is the power of the second subcarrier signal after the original broadband signal is decomposed by the combined filter.
  • the compensation device determines the state value A1 of the first subcarrier signal and the state value A2 of the second subcarrier signal based on the power S1 of the first subcarrier signal and the power S2 of the second subcarrier signal.
  • the determined state value A1 of the first subcarrier signal and the state value A2 of the second subcarrier signal may be shown in FIG9 .
  • the compensation device can determine the first index value based on the power S1 of the first subcarrier signal and the power S2 of the second subcarrier signal. Determine the second index value based on the state value A1 of the first subcarrier signal and the state value A2 of the second subcarrier signal. Generate an index address based on the first index value and the second index value. Then, input the index address into the lookup table of the frequency point where the first subcarrier signal is located to find the compensation value C1 corresponding to the first subcarrier signal. Input the index address into the lookup table of the frequency point where the second subcarrier signal is located to find the compensation value C2 corresponding to the second subcarrier signal.
  • the first subcarrier signal can be compensated based on the compensation value C1 corresponding to the first subcarrier signal to obtain the compensated first subcarrier signal.
  • the second subcarrier signal can be compensated based on the compensation value C2 corresponding to the second subcarrier signal to obtain the compensated second subcarrier signal.
  • the compensation value C1 corresponding to the first subcarrier signal is multiplied by the power S1 of the first subcarrier signal to obtain the compensated first carrier signal.
  • the compensation value C2 corresponding to the second subcarrier signal is multiplied by the power S2 of the second carrier signal to obtain the compensated second subcarrier signal.
  • compensated first carrier signal and the compensated second subcarrier signal are added to obtain a compensated broadband signal.
  • the RF AM-AM characteristics of the above-mentioned compensated broadband signal are significantly improved on the basis of DPD.
  • the RF AM-PM characteristics of the above-mentioned compensated wideband signal are significantly improved on the basis of DPD.
  • the present disclosure includes hardware structures and/or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.
  • FIG12 is a schematic diagram of a compensation device according to some embodiments.
  • the compensation device 2000 is used to perform the above The compensation method for broadband signals is described above, wherein the compensation device 2000 includes a frequency decomposition module 2001, a signal compensation module 2002 and a merging module 2003.
  • the frequency decomposition module 2001 may include a plurality of FIR filters (eg, FIR1, FIR2, and FIRN) for decomposing a broadband signal into a plurality of subcarrier signals.
  • FIR1, FIR2, and FIRN FIR1, FIR2, and FIRN
  • the signal compensation module 2002 includes multiple state value generation modules (e.g., state value generation module 1, state value generation module 2, and state value generation module N), a routing module, multiple lookup table modules (e.g., lookup table module 1, lookup table module 2, and lookup table module N), and a combined compensation module.
  • state value generation modules e.g., state value generation module 1, state value generation module 2, and state value generation module N
  • routing module e.g., multiple lookup table modules
  • lookup table modules e.g., lookup table module 1, lookup table module 2, and lookup table module N
  • a combined compensation module e.g., a combined compensation module.
  • a state value generating module is used to generate a state value of a subcarrier signal based on the power of the subcarrier signal.
  • Fig. 13 is a schematic diagram of the structure of a state value generation module according to some embodiments.
  • the state value generation module 1 may include multiple submodules.
  • the state value generation module 1 may include an initial state value generation module, a comparison module, an enhancement module, a weakening module and a multiplexer MUX.
  • the initial state value generating module is used to perform module value calculation on the power S1 of a subcarrier signal to obtain the initial state value of the subcarrier signal.
  • the comparison module is used to compare the initial state value of a subcarrier signal with the state value threshold. When the initial state value of the subcarrier signal is greater than or equal to the state value threshold, the initial state value of the subcarrier signal is input to the weakening module; when the initial state value of the subcarrier signal is less than the state value threshold, the initial state value of the subcarrier signal is input to the enhancing module.
  • the enhancement module is used to add the initial state value of the subcarrier signal to the second preset state value, and then use the sum of the initial state value of the subcarrier signal and the second preset state value as the state value of the subcarrier signal, and output the state value of the subcarrier signal.
  • the weakening module is used to subtract the initial state value of the subcarrier signal from the first preset state value, and then use the difference between the initial state value of the subcarrier signal and the first preset state value as the state value of the subcarrier signal, and output the state value of the subcarrier signal to the routing module.
  • the multiplexer MUX is used to ensure that the state value generation module of a certain frequency branch only performs enhancement processing or weakening processing at the same time, and outputs the state value A1 of the subcarrier signal of the frequency branch.
  • the routing module is used to generate an index address according to the power and state value of each subcarrier signal, and then output the index address to a lookup table module corresponding to the frequency point where each subcarrier signal is located.
  • each lookup table module is used to determine the compensation value of the subcarrier signal of the corresponding frequency point according to the index address after receiving the index address sent by the routing module, and then output the compensation value of the subcarrier signal of the frequency point corresponding to the lookup table module to the combined compensation module.
  • the combined compensation module is used to compensate the respective subcarrier signals based on the compensation values of the respective subcarrier signals.
  • the combined compensation module multiplies the power Sn of each subcarrier signal by the compensation value Cn to obtain each compensated subcarrier signal, and then the combined compensation module outputs each compensated subcarrier signal to the merging module 2003 .
  • the combining module 2003 After receiving each compensated subcarrier signal, the combining module 2003 is used to combine each compensated subcarrier signal to obtain a compensated broadband signal.
  • the combining module 2003 is used to accumulate each compensated subcarrier signal to obtain a compensated broadband signal Y, and then output the compensated broadband signal Y.
  • the compensation device 2000 completes the compensation for a broadband signal.
  • the compensation device 2000 may be designed before a digital-to-analog converter of a base station and after a digital predistortion module in a digital intermediate frequency link.
  • each module in FIG. 12 is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the embodiment of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present disclosure.
  • the storage medium for storing computer software products includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.
  • the embodiment of the present disclosure provides a structural schematic diagram of an electronic device, which can be the above-mentioned compensation device.
  • the electronic device 3000 includes: a processor 3002, a communication interface 3003 and a bus 3004.
  • the electronic device may also include a memory 3001.
  • the processor 3002 may be a device that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present disclosure.
  • the processor 3002 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
  • the processor 3002 may be a device that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present disclosure.
  • the processor 3002 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
  • the communication interface 3003 is used to connect with other devices through a communication network.
  • the communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.
  • the memory 3001 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • disk storage medium or other magnetic storage device or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.
  • the memory 3001 may exist independently of the processor 3002, and the memory 3001 may also be connected to the processor 3002 via the bus 3004 to store instructions or program codes.
  • the processor 3002 calls and executes the instructions or program codes stored in the memory 3001, the broadband signal compensation method provided in the embodiment of the present disclosure can be implemented.
  • the memory 3001 may also be integrated with the processor 3002 .
  • the bus 3004 may be an extended industry standard architecture (EISA) bus, etc.
  • the bus 3004 may be divided into an address bus, a data bus, a control bus, etc.
  • FIG15 only uses one thick line, but does not mean that there is only one bus or one type of bus.
  • the embodiment of the present disclosure also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer instructions to instruct the relevant hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments.
  • the computer-readable storage medium can be the memory or memory of any of the above embodiments.
  • the above computer-readable storage medium can also be an external storage device of the above compensation device, such as a plug-in hard disk, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. equipped on the above compensation device.
  • the above computer-readable storage medium can also include both the internal storage unit of the above compensation device and an external storage device.
  • the above computer-readable storage medium is used to store the above computer program and other programs and data required by the above compensation device.
  • the above computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.
  • the readable storage medium includes a non-transitory computer-readable storage medium.
  • the embodiments of the present disclosure further provide a computer program product, which includes a computer program.
  • the computer program product When the computer program product is run on a computer, the computer is enabled to execute any one of the broadband signal compensation methods provided in the above embodiments.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

La présente divulgation concerne un procédé de compensation de signal à large bande, ainsi qu'un appareil, un dispositif et un support de stockage associés. Le procédé consiste : à décomposer un signal à large bande en une pluralité de signaux de sous-porteuse ; à acquérir la puissance et la valeur d'état de chaque signal de sous-porteuse parmi la pluralité de signaux de sous-porteuse, la valeur d'état d'un signal de sous-porteuse servant à représenter l'état d'effet de mémoire à long terme d'un point de fréquence où est situé le signal de sous-porteuse ; en fonction de la puissance et de la valeur d'état de chaque signal de sous-porteuse parmi la pluralité de signaux de sous-porteuse, à compenser la pluralité de signaux de sous-porteuse pour obtenir une pluralité de signaux de sous-porteuse compensés ; et à fusionner la pluralité de signaux de sous-porteuse compensés pour obtenir un signal à large bande compensé.
PCT/CN2023/118783 2022-10-17 2023-09-14 Procédé de compensation de signal à large bande, appareil, dispositif et support de stockage associés WO2024082884A1 (fr)

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US8311137B1 (en) * 2008-01-24 2012-11-13 Marvell International Ltd. Method for DC offset removal in OFDM systems
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