Signal processing methods, signal processing devices, storage media, and electronic devices

Abstract

This application provides a signal processing method, signal processing apparatus, storage medium, and electronic device. The method includes: determining multiple fundamental carriers within a working frequency band, wherein the multiple fundamental carriers are aggregated and used; a first synchronization signal is mapped onto a fundamental carrier through frequency domain mapping; the first synchronization signal is used for frame detection of synchronization information block frames on the fundamental carrier; the fundamental carrier is the initial carrier currently in use; determining a phase rotation factor corresponding to each fundamental carrier; and performing phase rotation on the first synchronization signal on the corresponding fundamental carrier according to the phase rotation factor to obtain a first processed signal of the fundamental carrier, wherein at least two of the first processed signals have different peak positions. This method performs specific phase rotation on the synchronization signals of different fundamental carriers, and can significantly reduce the peak-to-average power ratio of the synchronization signal during multi-carrier aggregation without affecting the time-domain characteristics of the synchronization signal.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and more specifically, to a signal processing method, a signal processing apparatus, a storage medium, and an electronic device. Background Technology

[0002] In modern wireless communication systems, multi-carrier aggregation technology is often used to improve spectrum utilization and peak data rate. This involves combining multiple independent basic carriers to form a wideband transmission channel. To achieve fast access and time-frequency synchronization between terminals and base stations, the system is equipped with at least one synchronization signal on each basic carrier, typically including a first synchronization signal and a second synchronization signal.

[0003] However, when multiple fundamental carriers are aggregated for transmission, the synchronization signals on each carrier are completely identical in the frequency domain. The time-domain waveforms generated after their independent inverse fast Fourier transforms (IFFTs) are highly correlated on the time axis, causing these waveforms to coherently superimpose at their peak values. This significantly increases the instantaneous peak power of the aggregated signal. Consequently, the peak-to-average power ratio (PAPR) rises sharply, forcing the power amplifier to operate in a back-off mode far from the saturation region, thus drastically reducing its energy conversion efficiency. Summary of the Invention

[0004] The main objective of this application is to provide a signal processing method, signal processing device, storage medium, and electronic device to at least solve the problem in the prior art where the peak-to-average power ratio is too high when multiple basic carriers are aggregated for transmission, resulting in low energy conversion efficiency.

[0005] To achieve the above objectives, according to one aspect of this application, a signal processing method is provided, comprising: determining multiple fundamental carriers within an operating frequency band, wherein the multiple fundamental carriers are aggregated and used, a first synchronization signal is mapped onto one of the fundamental carriers via frequency domain mapping, the first synchronization signal being used for signal synchronization header detection, and the fundamental carrier being an initial carrier currently in use; determining phase rotation factors corresponding to the multiple fundamental carriers respectively; and performing phase rotation on the first synchronization signal on the corresponding fundamental carrier according to the phase rotation factors corresponding to the multiple fundamental carriers respectively, to obtain a first processed signal for the corresponding fundamental carrier, wherein at least two of the first processed signals have different peak positions.

[0006] Optionally, the step of performing phase rotation on the first synchronization signal on the corresponding basic carrier according to the phase rotation factors corresponding to the plurality of basic carriers respectively to obtain the first processing signal of the corresponding basic carrier includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the first synchronization signal on the corresponding basic carrier to obtain the first processing signal of the corresponding basic carrier.

[0007] Optionally, the second synchronization signal is mapped onto a base carrier in the frequency domain, the transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal, and the method further includes: multiplying the phase rotation factor corresponding to each of the plurality of base carriers with the second synchronization signal on the corresponding base carrier to obtain a second processed signal for the corresponding base carrier, wherein at least two of the second processed signals have different peak positions.

[0008] Optionally, the method further includes: obtaining a local signal of a signal receiver corresponding to the basic carrier, wherein the local signal is a local signal of the signal receiver used for channel estimation; performing phase rotation on the local signal according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor; and performing channel estimation on the channel corresponding to the basic carrier according to the second processed signal and the third processed signal.

[0009] Optionally, a second synchronization signal and a synchronization signaling symbol are also mapped on one of the base carriers. The synchronization signaling symbol is a symbol sequence and includes system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The method further includes: multiplying the phase rotation factors corresponding to the plurality of base carriers respectively with the second synchronization signal on the corresponding base carrier to obtain a second processed signal for the corresponding base carrier; and multiplying the phase rotation factors corresponding to the plurality of base carriers respectively with the synchronization signaling symbol on the corresponding base carrier to obtain a fourth processed signal for the corresponding base carrier, wherein at least two of the second processed signals have different peak positions.

[0010] Optionally, determining the phase rotation factor corresponding to each of the plurality of basic carriers includes: obtaining a preset coefficient value and a relative index of a target carrier, wherein the target carrier is any one of the basic carriers, and the relative index is the arrangement index of the target carrier among all the initial carriers, and all the initial carriers are arranged from low frequency to high frequency; determining a target exponent based on the relative index and the preset coefficient value; and performing exponential calculation using the natural constant as the base and the target exponent as the exponent to obtain the phase rotation factor corresponding to the target carrier.

[0011] Optionally, obtaining a preset coefficient value includes: obtaining the number of all the basic carriers within the operating frequency band to obtain a target number; and determining the preset coefficient value as the integer power of the preset constant closest to the target number.

[0012] According to another aspect of this application, a signal processing apparatus is provided, comprising: a first determining unit, configured to determine a plurality of fundamental carriers within an operating frequency band, wherein the plurality of fundamental carriers are aggregated and used, a first synchronization signal is mapped onto one of the fundamental carriers through a frequency domain, the first synchronization signal is used for signal synchronization header detection, and the fundamental carrier is an initial carrier currently in use; a second determining unit, configured to determine phase rotation factors corresponding to the plurality of fundamental carriers respectively; and a processing unit, configured to perform phase rotation on the first synchronization signal on the corresponding fundamental carrier according to the phase rotation factors corresponding to the plurality of fundamental carriers respectively, to obtain a first processed signal of the corresponding fundamental carrier, wherein at least two of the first processed signals have different peak positions.

[0013] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the signal processing methods described above.

[0014] According to another aspect of this application, an electronic device is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including methods for performing any of the signal processing methods described above.

[0015] Applying the technical solution of this application, the above-mentioned signal processing method first determines multiple fundamental carriers within the operating frequency band, wherein the multiple fundamental carriers are aggregated and used. A first synchronization signal is mapped onto a fundamental carrier through frequency domain mapping. The first synchronization signal is used for frame detection of synchronization information block frames on the fundamental carrier, and the fundamental carrier is the initial carrier currently in use. Next, the phase rotation factor corresponding to each fundamental carrier is determined. Finally, the phase of the first synchronization signal on the corresponding fundamental carrier is rotated according to the phase rotation factor to obtain the first processed signal of the fundamental carrier, wherein at least two of the first processed signals have different peak positions. This method performs specific phase rotation on the synchronization signals of different fundamental carriers, which can significantly reduce the peak-to-average power ratio of the synchronization signal during multi-carrier aggregation without affecting the time-domain characteristics of the synchronization signal. This solves the problem of excessively high peak-to-average power ratio and low energy conversion efficiency caused by aggregated transmission of multiple fundamental carriers in the prior art. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 A hardware structure block diagram of a mobile terminal performing a signal processing method according to an embodiment of this application is shown;

[0018] Figure 2 A schematic flowchart of a signal processing method according to an embodiment of this application is shown;

[0019] Figure 3 A schematic diagram of the structure of a synchronization information block according to an embodiment of this application is shown;

[0020] Figure 4 A schematic diagram illustrating the principle of orthogonal frequency division multiplexing modulation according to an embodiment of this application is shown;

[0021] Figure 5 A performance comparison chart of peak-to-average power ratio between the prior art and embodiments of this application is shown in the case of aggregation of all base carriers;

[0022] Figure 6 A performance comparison chart of peak-to-average power ratio between existing technologies and embodiments of this application is shown in the case of partial base carrier aggregation;

[0023] Figure 7 A structural block diagram of a signal processing apparatus provided according to an embodiment of this application is shown.

[0024] The above figures include the following reference numerals:

[0025] 102. Processor; 104. Memory; 106. Transmission device; 108. Input / output device. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] As described in the background section, in modern wireless communication systems, multi-carrier aggregation technology is often used to improve spectrum utilization and peak data rate. This involves combining multiple independent basic carriers to form a wideband transmission channel. Each basic carrier is typically based on orthogonal frequency division multiplexing (OFDM) or a variant thereof, transmitting synchronization signals, control signaling, and data information through frequency domain mapping.

[0030] To achieve rapid access and time-frequency synchronization between the terminal and the base station, the system is equipped with at least one synchronization signal on each basic carrier, typically including a first synchronization signal and a second synchronization signal. The first synchronization signal S1 is mainly used for frame header detection and coarse synchronization, while the second synchronization signal S2 is mainly used for fine synchronization and auxiliary synchronization signaling parsing. In traditional designs, to simplify the receiver's processing logic and ensure reliable acquisition of synchronization information in any single-carrier or aggregated carrier scenario, the second synchronization signal mapped on all aggregated basic carriers is identical in content to the first synchronization signal; that is, its frequency domain sequence remains consistent across carriers.

[0031] However, when multiple fundamental carriers are aggregated and transmitted, because the synchronization signals on each carrier are completely identical in the frequency domain, the time-domain waveforms generated after their independent inverse fast Fourier transforms are highly correlated on the time axis. This causes these waveforms to coherently superimpose at their peak values, significantly increasing the instantaneous peak power of the aggregated signal. Since the average power of the system is determined by the total energy of all carriers, the ratio of peak power to average power, i.e., the peak-to-average power ratio, will increase sharply.

[0032] High PAPR (Power Amplifier Performance Ratio) places stringent requirements on the transmitter power amplifier (PA): to avoid signal nonlinear distortion and spectrum regeneration, the power amplifier must operate in a back-off mode far from the saturation region, thus significantly reducing its energy conversion efficiency. This not only increases system power consumption and heat dissipation burden, but also severely restricts the battery life and hardware cost control of terminal devices (especially battery-powered portable devices), becoming a key bottleneck restricting the improvement of energy efficiency in multi-carrier aggregation systems.

[0033] To address the problem of excessively high peak-to-average power ratio and low energy conversion efficiency when multiple base carriers are aggregated for transmission in the prior art, embodiments of this application provide a signal processing method, a signal processing apparatus, a storage medium, and an electronic device.

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal according to an embodiment of the signal processing method of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0036] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the signal processing method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0037] This embodiment provides a signal processing method that runs on a mobile terminal, computer terminal, or similar computing device. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0038] Figure 2 This is a flowchart of a signal processing method according to an embodiment of this application. For example... Figure 2 As shown, the method includes the following steps:

[0039] Step S201: Determine multiple base carriers within the operating frequency band, wherein the multiple base carriers are aggregated and used, and a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping. The first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use.

[0040] Specifically, the operating frequency band is divided into several initial carriers. All of these initial carriers may be used, or only some may be in use. The initial carriers currently in use are referred to as component carriers (CCs). The system supports the aggregated use of multiple component carriers to improve transmission rate and spectrum utilization. The first synchronization signal is mapped in a fixed sequence in the frequency domain of each component carrier, used by the terminal equipment to achieve initial frame synchronization, time-frequency domain acquisition, or channel estimation.

[0041] Step S202: Determine the phase rotation factors corresponding to the above-mentioned multiple basic carriers respectively;

[0042] Specifically, different fundamental carriers correspond to different phase rotation factors. By designing different phase rotation factors for different fundamental carriers, differentiated modulation of the first synchronization signal on each fundamental carrier is achieved. This differentiation is completely predictable and reproducible, does not depend on external signaling, and ensures low system overhead and protocol compatibility. This design avoids the increased receiver complexity caused by traditional random scrambling codes and achieves a lightweight reduction in PAPR.

[0043] Step S203: Based on the phase rotation factors corresponding to the aforementioned multiple base carriers, the first synchronization signal on the corresponding base carrier is phase rotated to obtain the first processed signal of the corresponding base carrier, wherein at least two of the aforementioned first processed signals have different peak positions.

[0044] Specifically, by introducing a dedicated phase rotation of the fundamental carrier, the power peak alignment characteristics of multiple first synchronization signals in the time domain are effectively broken down, making the instantaneous power distribution of the total signal tend to be uniform. Thus, without changing the signal structure, increasing bandwidth or redundancy, or modifying the receiver detection algorithm, a significant reduction in PAPR is achieved.

[0045] The signal processing method described in this application first determines multiple fundamental carriers within the operating frequency band, wherein these multiple fundamental carriers are aggregated and used. A first synchronization signal is mapped onto a fundamental carrier through frequency domain mapping. The first synchronization signal is used for frame detection of synchronization information block frames on the fundamental carrier, which is the initial carrier currently in use. Next, the phase rotation factor corresponding to each fundamental carrier is determined. Finally, the phase of the first synchronization signal on the corresponding fundamental carrier is rotated according to the phase rotation factor to obtain a first processed signal for the fundamental carrier. At least two of the first processed signals have different peak positions. This method performs specific phase rotation on the synchronization signals of different fundamental carriers, significantly reducing the peak-to-average power ratio (PAPR) of the synchronization signal during multi-carrier aggregation without affecting the time-domain characteristics of the synchronization signal. This solves the problem of excessively high PAPR and low energy conversion efficiency in existing technologies when multiple fundamental carriers are aggregated for transmission.

[0046] By applying the technical solution of the above embodiments, an independent phase rotation factor is assigned to each basic carrier in the multi-carrier aggregation system, and the phase of the first synchronization signal mapped in the frequency domain is rotated based on the factor. This causes the first processed signals on at least two basic carriers to exhibit different peak positions in the time domain, thereby effectively breaking the time domain peak superposition effect caused by the consistent frequency domain mapping of the original synchronization signal. This significantly reduces the peak-to-average power ratio (PAPR) of the synthesized signal after aggregation, and achieves smoothing of the signal waveform without changing the synchronization detection function. This solves the technical problems in the prior art where the PAPR of the synchronization signal increases due to the same frequency domain structure, the system power amplifier is prone to saturation, and the transmission efficiency decreases during multi-carrier aggregation. This achieves the comprehensive technical effect of improving the transmission performance of the multi-carrier system, enhancing signal transmission stability, and reducing the design difficulty and energy consumption of the power amplifier.

[0047] In some embodiments, the above-mentioned phase rotation of the first synchronization signal on the corresponding basic carrier according to the phase rotation factors corresponding to the plurality of basic carriers to obtain the first processing signal of the corresponding basic carrier includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers with the first synchronization signal on the corresponding basic carrier to obtain the first processing signal of the corresponding basic carrier.

[0048] Specifically, carrier-specific phase rotation is achieved through frequency domain phase multiplication, causing the first synchronization signal on each base carrier to generate a peak shift due to phase difference after IFFT transformation in the time domain. This effectively breaks up the power peak alignment of multi-carrier signals, significantly reduces the peak power of aggregated signals, and achieves a systematic reduction in PAPR.

[0049] In some embodiments, the second synchronization signal is frequency-domain mapped onto one of the aforementioned basic carriers, the transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal, and the method further includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the second synchronization signal on the corresponding basic carrier to obtain the second processed signal of the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0050] The first and second synchronization signals can be used for synchronization (e.g., time offset estimation and frequency offset estimation), channel estimation (desynchronization information), and other functions. The functions of the first and second synchronization signals are not limited here; they can be assigned different functions according to actual needs. For example, both the first and second synchronization signals can be used for time offset estimation in different embodiments. In some embodiments, the function of the second synchronization signal can be initial detection, coarse synchronization, frame start positioning, etc. The function of the first synchronization signal can be fine synchronization, channel estimation, parameter parsing, etc.

[0051] Specifically, the synchronization signal in the frequency domain of the fundamental carrier. d ( k )and Multiply, where k It is the subcarrier index on the base carrier, where j is a complex number.

[0052] Among them, the sequence of the first synchronization signal d S1 ( k The generation method for ) is as follows:

[0053]

[0054] in, u This is the identifier for the first synchronization signal, corresponding to the symbol type.

[0055] The sequence of the second synchronization signal d S2 ( k The generation method for ) is as follows:

[0056]

[0057] in, u This is the identifier for the second synchronization signal, corresponding to the symbol type.

[0058] In this embodiment, in a multi-carrier aggregation scenario, the second synchronization signal is also mapped to each base carrier and its phase is rotated based on the same phase rotation factor as the first synchronization signal. This allows the first and second synchronization signals to generate first and second processed signals with different peak positions on each carrier, respectively. This effectively breaks the signal peak overlap phenomenon caused by the same frequency domain mapping. It not only continues the PAPR suppression effect of the first synchronization signal when used for frame detection, but also further solves the technical defect that the second synchronization signal is concentrated at the same frequency domain position due to the lack of phase adjustment, which causes a decrease in channel estimation performance. This achieves joint peak-to-average power ratio optimization of the synchronization signal and the channel estimation signal in the multi-carrier aggregation system, significantly improving the channel estimation accuracy and the overall synchronization stability of the system.

[0059] In addition, such as Figure 3As shown, a synchronization information block consists of a first synchronization signal S1, two second synchronization signals S2, and two synchronization signaling symbols SYNC. The synchronization signaling symbols are encoded and modulated symbol sequences of synchronization information; they are actually OFDM symbols. During the transmission of a synchronization information block, the transmission order of the above signals is: first synchronization signal S1, one second synchronization signal S2, another second synchronization signal S2, one synchronization signaling symbol SYNC, and another synchronization signaling symbol SYNC. The first synchronization signal S1 is mainly used for power detection and synchronization header detection, while the second synchronization signal S2 is mainly used for precise time-frequency offset detection. Since the transmission order of the second synchronization signal S2 is adjacent to that of the synchronization signaling symbols, using the second synchronization signal S2 to decode the information transmitted by the synchronization signaling symbols will result in better reception synchronization.

[0060] Since the second synchronization signal S2 is used in conjunction with the synchronization signaling symbol, when both the first synchronization signal S1 and the second synchronization signal S2 undergo phase rotation, but the synchronization signaling symbol does not undergo phase rotation, the local signal at the receiving end still maintains its phase before the phase rotation. Therefore, in some embodiments, when both the first synchronization signal S1 and the second synchronization signal S2 undergo phase rotation, but the synchronization signaling symbol does not undergo phase rotation, the above method further includes the following steps:

[0061] Step S301: Obtain the local signal of the signal receiver corresponding to the basic carrier. The local signal is the local signal of the signal receiver used for channel estimation.

[0062] Step S302: The local signal is phase-rotated according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor.

[0063] Step S303: Perform the channel estimation on the channel corresponding to the basic carrier based on the second processing signal and the third processing signal.

[0064] Since the two synchronization signals and synchronization signaling symbols have different phases, the receiver needs to perform phase adjustment when performing channel estimation on the second synchronization signal S2. The specific steps are as follows: First, generate a frequency domain symbol sequence according to the generation formula of the second synchronization signal S2. d S2_local ( k (i.e., local signal), and then based on the relative sequence number of the fundamental carrier within the operating frequency band. n calculate ,Will Channel estimation is performed using a new local sequence, where... This is the third processed signal.

[0065] In this embodiment, the local signal used for channel estimation at the signal receiver corresponding to the basic carrier is obtained, and the local signal is synchronously phase-rotated according to the phase rotation factor corresponding to the basic carrier to generate a third processed signal. This ensures that the third processed signal and the second processed signal after the same phase rotation are consistent in the phase domain, thereby eliminating the phase mismatch problem caused by the local signal not participating in the phase rotation during the channel estimation process, significantly reducing the channel estimation error, improving synchronization accuracy and demodulation performance, and effectively ensuring the overall communication reliability and stability of the system in multi-carrier aggregation scenarios.

[0066] In some embodiments, a second synchronization signal and a synchronization signaling symbol are also mapped onto one of the aforementioned basic carriers. The synchronization signaling symbol is a symbol sequence and includes system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The method further includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the second synchronization signal on the corresponding basic carrier to obtain a second processed signal for the corresponding basic carrier; and multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the synchronization signaling symbol on the corresponding basic carrier to obtain a fourth processed signal for the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0067] In this embodiment, by applying phase rotation factors independently determined for each base carrier to the first synchronization signal, the second synchronization signal, and the synchronization signaling symbol in a multi-carrier aggregation scenario, the peak positions of the three types of synchronization signals after frequency domain mapping are differentiated. The first synchronization signal is used for frame detection, the second synchronization signal is used for channel estimation, and the synchronization signaling symbol carries the system configuration parameters required for multi-carrier aggregation access, signal demodulation, and resource scheduling. By synchronously performing phase rotation processing on the three, the problem of increased signal peak-to-average power ratio (PAPR) due to the consistent frequency domain mapping structure is effectively suppressed. Channel estimation deviation caused by the lack of rotation of the second synchronization signal and system parameter parsing errors caused by the lack of rotation of the synchronization signaling symbol are avoided. Thus, the overall PAPR of the synchronization signal is reduced and signal integrity is guaranteed at the aggregation transmitter. Ultimately, the synchronization detection accuracy, channel estimation reliability, and configuration parsing success rate of the multi-carrier aggregation system are improved, and the system access stability and resource scheduling efficiency are enhanced.

[0068] In some embodiments, determining the phase rotation factors corresponding to the plurality of fundamental carriers includes the following steps:

[0069] Step S401: Obtain the preset coefficient value and the relative sequence number of the target carrier. The target carrier is any one of the aforementioned basic carriers. The relative sequence number is the arrangement sequence number of the target carrier among all the aforementioned initial carriers. All the aforementioned initial carriers are arranged from low frequency to high frequency.

[0070] Step S402: Determine the target index based on the aforementioned relative sequence number and the aforementioned preset coefficient value;

[0071] Step S403: Using the natural constant as the base and the target index as the exponent, perform exponential calculation to obtain the phase rotation factor corresponding to the target carrier.

[0072] Wherein, the relative index of the target carrier is n, the preset coefficient value is N, and the natural constant is e, using the relative index... n Calculate the phase rotation factor of the fundamental carrier. Including: using formulas The phase rotation factor was calculated. ,in N = 10, n = 0, 1, 2, …....

[0073] Or use the formula The phase rotation factor was calculated. ,in N = 10, n = 0, 1, 2, …... It should be noted that the calculation of the phase rotation factor is not limited to the above formula.

[0074] In this embodiment, by obtaining the relative sequence number of the preset coefficient value and the target carrier, and based on the sequence position of the target carrier in all initial carriers from low frequency to high frequency, the target index is uniquely determined in combination with the preset coefficient value. Then, an exponential operation is performed with the natural constant as the base and the target index as the exponent to generate a phase rotation factor specific to each basic carrier. This operation method ensures that the phase rotation factor has a non-uniform and asymmetric exponential distribution. Thus, when the phase rotation of the first synchronization signal on each basic carrier is performed, the first processed signal corresponding to different carriers produces a significant and controllable peak shift in the time domain. This effectively breaks the signal peak superposition effect caused by the same frequency domain mapping, and achieves a stable reduction in the peak-to-average power ratio in multi-carrier aggregation scenarios. It solves the technical defects of the lack of systematic generation of phase rotation factor and uncontrollable peak shift in traditional methods, and ultimately significantly improves the detection reliability of synchronization signal and system transmission efficiency in complex carrier aggregation environments.

[0075] In some embodiments, obtaining a preset coefficient value includes the following steps:

[0076] Step S4011: Obtain the number of all the aforementioned basic carriers within the aforementioned operating frequency band to obtain the target number;

[0077] Step S4012: The integer power of the preset constant that is closest to the target quantity is determined as the preset coefficient value.

[0078] The preset constant is 2, which is the same as in the above embodiments. N =2 t ,2 t It is the nearest power of 2 to the number of aggregated carriers.

[0079] In this embodiment, the target number is determined by obtaining the number of all basic carriers within the working frequency band. The integer power of the preset constant closest to the target number is used as the preset coefficient value, so that the preset coefficient value and the actual number of aggregated carriers form a dynamic and deterministic mathematical relationship. Then, based on the coefficient value and the relative sequence number of each basic carrier, the corresponding phase rotation factor is calculated to ensure that the exponential distribution of the phase rotation factor under different aggregation scenarios has high regularity and predictability. This effectively guides the first synchronization signal to generate significantly different peak positions on each basic carrier after phase rotation, avoiding fluctuations in the peak-to-average power ratio (PAPR) suppression effect caused by arbitrary coefficient selection. This significantly improves the peak difference control capability of the synchronization signal and the stability and repeatability of PAPR reduction in the multi-carrier aggregation system, ultimately achieving effective suppression of synchronization signal interference and power fluctuations in multi-carrier scenarios.

[0080] In some embodiments, the first processing signal is a frequency domain synchronization signal. After performing phase rotation on the corresponding first synchronization signal according to the phase rotation factor to obtain the first processing signal of the basic carrier, the method further includes: performing orthogonal frequency division multiplexing modulation on the first processing signals of all the basic carriers to obtain a time domain synchronization signal.

[0081] Among them, such as Figure 4 As shown, taking the first processed signal as an example, the multiple basic carriers are CC0, CC1, ..., CCn. Each basic carrier corresponds to a frequency domain synchronization signal (i.e., the first synchronization signal). After the multiple first synchronization signals are phase-rotated to obtain the first processed signal, all the first processed signals are orthogonal frequency division multiplexing modulation to obtain a time domain synchronization signal.

[0082] In this embodiment, under the framework of multiple basic carrier aggregation, different phase rotation factors are first applied to the first synchronization signal on each basic carrier, so that the peak positions of the frequency domain first processed signals corresponding to each basic carrier are staggered, thereby effectively suppressing the problem of increased peak-to-average power ratio caused by the same frequency domain mapping during multi-carrier aggregation. Furthermore, all frequency domain first processed signals after phase rotation are uniformly subjected to orthogonal frequency division multiplexing modulation and merged to generate a single time domain synchronization signal. This solves the technical defect of the original scheme that only completes frequency domain phase optimization but lacks a time domain signal synthesis mechanism, realizes complete time domain transmission and reception of synchronization signals in multi-carrier aggregation scenarios, and improves the system's synchronization detection reliability and signal transmission integrity in complex spectrum environments.

[0083] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the signal processing method of this application will be described in detail below with reference to specific embodiments.

[0084] This embodiment relates to a specific signal processing method, including the following steps:

[0085] Step S1: First, obtain the relative sequence number of the occupied basic carrier within the operating frequency band. n .

[0086] Step S2: Use relative serial numbers n Calculate the phase rotation factor of the fundamental carrier. Among them, as an optional implementation method, ,in N = 10, n = 0, 1, 2, …... Among these, as an optional implementation method, ,in N = 2 t The phase rotation factor is the nearest power of 2 to the number of aggregated carriers. The calculation of the phase rotation factor is not limited to the formula above.

[0087] Step S3: The synchronization signal in the frequency domain of the fundamental carrier. d ( k )and Multiply, where k This refers to the subcarrier index on the base carrier. The sequence of the first synchronization signal is also included. d S1 ( k The generation method for ) is as follows: ,in, u This is the identifier for the first synchronization signal, corresponding to the symbol type. The sequence of the second synchronization signal... d S2 ( k The generation method for ) is as follows: ,in, u This is the identifier for the second synchronization signal, corresponding to the symbol type.

[0088] Step S4: The frequency domain synchronization signal after phase rotation is OFDM modulated to obtain the time domain synchronization signal.

[0089] In addition, as optional implementations, the following situations are included: First, the second synchronization signal S2 does not undergo phase rotation, and only the first synchronization signal S1 undergoes phase rotation; Second, both the second synchronization signal S2 and the first synchronization signal S1 undergo phase rotation; Third, the second synchronization signal S2, the first synchronization signal S1, and the synchronization signaling symbol all undergo phase rotation.

[0090] The synchronization signaling symbol is a sequence of symbols encoded and modulated with synchronization information, consisting of two OFDM symbols. The first synchronization signal S1, the second synchronization signal S2, and the two synchronization signaling symbols together constitute a synchronization information block.

[0091] In the second scenario, since the synchronization signal and the synchronization signaling symbol have different phases, the receiver needs to perform phase adjustment when estimating the channel using the second synchronization signal S2. The specific steps are as follows: First, generate a frequency domain symbol sequence according to the generation formula of the second synchronization signal S2. d S2_local ( k Then, based on the relative sequence number of the fundamental carrier within the operating frequency band... n calculate ,Will Channel estimation is performed using the new local sequence.

[0092] The performance comparison diagram of peak-to-average power ratio between the prior art and the embodiments of this application is shown in the figure below. Figure 5 and Figure 6 As shown, Figure 5 Performance comparison chart for the case where all base carriers are aggregated, i.e., all initial carriers are in use, i.e., all initial carriers are base carriers. Figure 6 Performance comparison chart with 80% base carrier aggregation, meaning 80% of the initial carriers are in use, and only 80% of the initial carriers are base carriers. Figure 5 and Figure 6 As shown, the blue lines represent the unrotated (i.e., prior art) PAPR curves, while the other colors represent rotated PAPR curves with varying phase rotation factors. The PAPR curves for different values ​​of the preset coefficient N in the formula. Figure 5 and Figure 6 It can be seen that the PAPR after rotation is significantly lower than that of the unrotated PAPR.

[0093] This application also provides a signal processing apparatus. It should be noted that the signal processing apparatus of this application can be used to execute the signal processing method provided in this application. This apparatus is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0094] The signal processing apparatus provided in the embodiments of this application will be described below.

[0095] Figure 7 This is a schematic diagram of a signal processing apparatus according to an embodiment of this application. Figure 7 As shown, the device includes a first determining unit 10, a second determining unit 20, and a processing unit 30. The first determining unit 10 is used to determine multiple base carriers within the operating frequency band, wherein the multiple base carriers are aggregated and used, and a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping. The first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use. The second determining unit 20 is used to determine the phase rotation factors corresponding to the multiple base carriers respectively. The processing unit 30 is used to perform phase rotation on the first synchronization signal on the corresponding base carrier according to the phase rotation factors corresponding to the multiple base carriers respectively, to obtain the first processed signal of the corresponding base carrier, wherein at least two of the first processed signals have different peak positions.

[0096] The signal processing apparatus of this application includes a first determining unit, a second determining unit, and a processing unit. The first determining unit is used to determine multiple fundamental carriers within the operating frequency band, wherein the multiple fundamental carriers are aggregated and used, and a first synchronization signal is mapped onto a fundamental carrier through frequency domain mapping. The first synchronization signal is used for frame detection of synchronization information block frames on the fundamental carrier, and the fundamental carrier is the initial carrier currently in use. The second determining unit is used to determine the phase rotation factor corresponding to each fundamental carrier. The processing unit is used to perform phase rotation on the first synchronization signal on the corresponding fundamental carrier according to the phase rotation factor to obtain a first processed signal of the fundamental carrier, wherein at least two of the first processed signals have different peak positions. This apparatus performs specific phase rotation on the synchronization signals of different fundamental carriers, which can significantly reduce the peak-to-average power ratio of the synchronization signal when multiple carriers are aggregated without affecting the time-domain characteristics of the synchronization signal. This solves the problem of excessively high peak-to-average power ratio and low energy conversion efficiency caused by aggregated transmission of multiple fundamental carriers in the prior art.

[0097] In some embodiments, the processing unit includes a processing subunit, which is used to multiply the phase rotation factor corresponding to the plurality of base carriers by the first synchronization signal on the corresponding base carrier to obtain the first processing signal of the corresponding base carrier.

[0098] By using frequency domain phase multiplication to achieve carrier-specific phase rotation, the first synchronization signal on each base carrier generates a peak shift due to phase difference after IFFT transformation in the time domain. This effectively breaks up the power peak alignment of multi-carrier signals, significantly reduces the peak power of aggregated signals, and achieves a systematic reduction in PAPR.

[0099] In some embodiments, the second synchronization signal is frequency-domain mapped onto one of the aforementioned basic carriers. The transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal. The processing unit includes a first processing module, used to multiply the phase rotation factor corresponding to each of the plurality of basic carriers with the second synchronization signal on the corresponding basic carrier to obtain a second processed signal for the corresponding basic carrier. At least two of the second processed signals have different peak positions. This effectively breaks the signal peak overlap phenomenon caused by the same frequency-domain mapping, and not only continues the PAPR suppression effect of the first synchronization signal when used for frame detection.

[0100] In some embodiments, the above-described apparatus further includes a first acquisition module, a second processing module, and a third processing module. The first acquisition module is used to acquire the local signal of the signal receiver corresponding to the basic carrier, wherein the local signal is a local signal of the signal receiver used for channel estimation. The second processing module is used to perform phase rotation on the local signal according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor. The third processing module is used to perform channel estimation on the channel corresponding to the basic carrier based on the second processed signal and the third processed signal. This eliminates the phase mismatch problem caused by the local signal not participating in phase rotation during the channel estimation process, significantly reduces channel estimation error, improves synchronization accuracy and demodulation performance, and thus effectively ensures the overall communication reliability and stability of the system in multi-carrier aggregation scenarios.

[0101] In some embodiments, a second synchronization signal and a synchronization signaling symbol are also mapped onto one of the aforementioned basic carriers. The synchronization signaling symbol is a symbol sequence and includes system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The processing unit includes a fourth processing module, which is used to multiply the phase rotation factors corresponding to the aforementioned multiple basic carriers with the second synchronization signal on the corresponding basic carrier to obtain a second processed signal for the corresponding basic carrier, and to multiply the phase rotation factors corresponding to the aforementioned multiple basic carriers with the synchronization signaling symbol on the corresponding basic carrier to obtain a fourth processed signal for the corresponding basic carrier. At least two of the aforementioned second processed signals have different peak positions. This achieves a differentiated distribution of the peak positions of the three types of synchronization signals after frequency domain mapping.

[0102] In some embodiments, the second determining unit includes a second acquisition module, a first determining module, and a fifth processing module. The second acquisition module is used to acquire a preset coefficient value and the relative sequence number of the target carrier. The target carrier is any one of the aforementioned basic carriers, and the relative sequence number is the arrangement sequence number of the target carrier among all the aforementioned initial carriers, all of which are arranged from low frequency to high frequency. The first determining module is used to determine the target exponent based on the relative sequence number and the preset coefficient value. The fifth processing module is used to perform exponential operations using the natural constant as the base and the target exponent as the exponent to obtain the phase rotation factor corresponding to the target carrier. This operation method ensures that the phase rotation factor has a non-uniform, asymmetric exponential distribution, thereby causing a significant and controllable peak shift in the time domain of the first processed signal corresponding to different carriers when performing phase rotation on the first synchronization signal on each basic carrier, effectively breaking the signal peak superposition effect caused by the same frequency domain mapping.

[0103] In some embodiments, the second acquisition module includes an acquisition submodule and a determination submodule. The acquisition submodule is used to acquire the number of all the aforementioned basic carriers within the aforementioned operating frequency band to obtain a target number. The determination submodule is used to determine the integer power of the preset constant closest to the target number as the preset coefficient value. Based on this coefficient value and the relative index of each basic carrier, the corresponding phase rotation factor is calculated to ensure that the exponential distribution of the phase rotation factor under different aggregation scenarios has high regularity and predictability, thereby effectively guiding the first synchronization signal to generate significantly different peak positions on each basic carrier after phase rotation.

[0104] In some embodiments, the first processed signal is a frequency-domain synchronization signal. The apparatus further includes a modulation module, used to perform orthogonal frequency division multiplexing modulation on all the first processed signals of the fundamental carrier after performing phase rotation on at least the corresponding first synchronization signal according to the phase rotation factor to obtain the first processed signal of the fundamental carrier, thereby obtaining a time-domain synchronization signal. By uniformly performing orthogonal frequency division multiplexing modulation on all the frequency-domain first processed signals after phase rotation and merging them to generate a single time-domain synchronization signal, the technical deficiency of the original scheme, which only performs frequency-domain phase optimization but lacks a time-domain signal synthesis mechanism, is solved.

[0105] The aforementioned signal processing device includes a processor and a memory. The first determining unit and other components are stored as program units in the memory, and the processor executes these program units to achieve the corresponding functions. All of the aforementioned modules are located in the same processor; alternatively, the modules may be located in different processors in any combination.

[0106] The processor contains a core, which retrieves the corresponding program unit from memory. One or more cores can be configured, and adjusting core parameters can address the problem of excessively high peak-to-average power ratios leading to low energy conversion efficiency when multiple base carriers are aggregated for transmission in existing technologies.

[0107] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0108] This invention provides a computer-readable storage medium including a stored program, wherein the program, when running, controls the device containing the computer-readable storage medium to execute the signal processing method.

[0109] Specifically, signal processing methods include:

[0110] Step S201: Determine multiple base carriers within the operating frequency band, wherein the multiple base carriers are aggregated and used, and a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping. The first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use.

[0111] Specifically, the operating frequency band is divided into several initial carriers. All of these initial carriers may be used, or only some may be in use. The initial carriers currently in use are referred to as component carriers (CCs). The system supports the aggregated use of multiple component carriers to improve transmission rate and spectrum utilization. The first synchronization signal is mapped in a fixed sequence in the frequency domain of each component carrier, used by the terminal equipment to achieve initial frame synchronization, time-frequency domain acquisition, or channel estimation.

[0112] Step S202: Determine the phase rotation factors corresponding to the above-mentioned multiple basic carriers respectively;

[0113] Specifically, different fundamental carriers correspond to different phase rotation factors. By designing different phase rotation factors for different fundamental carriers, differentiated modulation of the first synchronization signal on each fundamental carrier is achieved. This differentiation is completely predictable and reproducible, does not depend on external signaling, and ensures low system overhead and protocol compatibility. This design avoids the increased receiver complexity caused by traditional random scrambling codes and achieves a lightweight reduction in PAPR.

[0114] Step S203: Based on the phase rotation factors corresponding to the aforementioned multiple base carriers, the first synchronization signal on the corresponding base carrier is phase rotated to obtain the first processed signal of the corresponding base carrier, wherein at least two of the aforementioned first processed signals have different peak positions.

[0115] Specifically, by introducing a dedicated phase rotation of the fundamental carrier, the power peak alignment characteristics of multiple first synchronization signals in the time domain are effectively broken down, making the instantaneous power distribution of the total signal tend to be uniform. Thus, without changing the signal structure, increasing bandwidth or redundancy, or modifying the receiver detection algorithm, a significant reduction in PAPR is achieved.

[0116] Optionally, the above-mentioned phase rotation of the first synchronization signal on the corresponding basic carrier according to the phase rotation factors corresponding to the plurality of basic carriers to obtain the first processing signal of the corresponding basic carrier includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers with the first synchronization signal on the corresponding basic carrier to obtain the first processing signal of the corresponding basic carrier.

[0117] Optionally, the second synchronization signal is mapped onto one of the aforementioned basic carriers in the frequency domain, the transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal, and the method further includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the second synchronization signal on the corresponding basic carrier to obtain the second processed signal of the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0118] Optionally, the above method further includes: obtaining a local signal of the signal receiver corresponding to the basic carrier, wherein the local signal is a local signal of the signal receiver used for channel estimation; performing phase rotation on the local signal according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor; and performing channel estimation on the channel corresponding to the basic carrier according to the second processed signal and the third processed signal.

[0119] Optionally, a second synchronization signal and a synchronization signaling symbol are also mapped onto one of the aforementioned basic carriers. The synchronization signaling symbol is a symbol sequence and includes system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The method further includes: multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the second synchronization signal on the corresponding basic carrier to obtain a second processed signal for the corresponding basic carrier; and multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the synchronization signaling symbol on the corresponding basic carrier to obtain a fourth processed signal for the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0120] Optionally, determining the phase rotation factor corresponding to each of the aforementioned multiple basic carriers includes: obtaining a preset coefficient value and a relative index of the target carrier, wherein the target carrier is any one of the aforementioned basic carriers, and the relative index is the arrangement index of the target carrier among all the aforementioned initial carriers, and all the aforementioned initial carriers are arranged from low frequency to high frequency; determining a target index based on the aforementioned relative index and the aforementioned preset coefficient value; and performing an exponential operation using the natural constant as the base and the aforementioned target index as the exponent to obtain the aforementioned phase rotation factor corresponding to the aforementioned target carrier.

[0121] Optionally, obtaining the preset coefficient value includes: obtaining the number of all the aforementioned basic carriers within the aforementioned operating frequency band to obtain the target number; and determining the preset coefficient value as the integer power of the preset constant closest to the target number.

[0122] This invention provides a processor for running a program, wherein the program executes the signal processing method described above.

[0123] Specifically, signal processing methods include:

[0124] Step S201: Determine multiple base carriers within the operating frequency band, wherein the multiple base carriers are aggregated and used, and a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping. The first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use.

[0125] Specifically, the operating frequency band is divided into several initial carriers. All of these initial carriers may be used, or only some may be in use. The initial carriers currently in use are referred to as component carriers (CCs). The system supports the aggregated use of multiple component carriers to improve transmission rate and spectrum utilization. The first synchronization signal is mapped in a fixed sequence in the frequency domain of each component carrier, used by the terminal equipment to achieve initial frame synchronization, time-frequency domain acquisition, or channel estimation.

[0126] Step S202: Determine the phase rotation factors corresponding to the above-mentioned multiple basic carriers respectively;

[0127] Specifically, different fundamental carriers correspond to different phase rotation factors. By designing different phase rotation factors for different fundamental carriers, differentiated modulation of the first synchronization signal on each fundamental carrier is achieved. This differentiation is completely predictable and reproducible, does not depend on external signaling, and ensures low system overhead and protocol compatibility. This design avoids the increased receiver complexity caused by traditional random scrambling codes and achieves a lightweight reduction in PAPR.

[0128] Step S203: Based on the phase rotation factors corresponding to the aforementioned multiple base carriers, the first synchronization signal on the corresponding base carrier is phase rotated to obtain the first processed signal of the corresponding base carrier, wherein at least two of the aforementioned first processed signals have different peak positions.

[0129] Specifically, by introducing a dedicated phase rotation of the fundamental carrier, the power peak alignment characteristics of multiple first synchronization signals in the time domain are effectively broken down, making the instantaneous power distribution of the total signal tend to be uniform. Thus, without changing the signal structure, increasing bandwidth or redundancy, or modifying the receiver detection algorithm, a significant reduction in PAPR is achieved.

[0130] Optionally, the above-mentioned phase rotation of the first synchronization signal on the corresponding basic carrier according to the phase rotation factors corresponding to the plurality of basic carriers to obtain the first processing signal of the corresponding basic carrier includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers with the first synchronization signal on the corresponding basic carrier to obtain the first processing signal of the corresponding basic carrier.

[0131] Optionally, the second synchronization signal is mapped onto one of the aforementioned basic carriers in the frequency domain, the transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal, and the method further includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the second synchronization signal on the corresponding basic carrier to obtain the second processed signal of the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0132] Optionally, the above method further includes: obtaining a local signal of the signal receiver corresponding to the basic carrier, wherein the local signal is a local signal of the signal receiver used for channel estimation; performing phase rotation on the local signal according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor; and performing channel estimation on the channel corresponding to the basic carrier according to the second processed signal and the third processed signal.

[0133] Optionally, a second synchronization signal and a synchronization signaling symbol are also mapped onto one of the aforementioned basic carriers. The synchronization signaling symbol is a symbol sequence and includes system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The method further includes: multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the second synchronization signal on the corresponding basic carrier to obtain a second processed signal for the corresponding basic carrier; and multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the synchronization signaling symbol on the corresponding basic carrier to obtain a fourth processed signal for the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0134] Optionally, determining the phase rotation factor corresponding to each of the aforementioned multiple basic carriers includes: obtaining a preset coefficient value and a relative index of the target carrier, wherein the target carrier is any one of the aforementioned basic carriers, and the relative index is the arrangement index of the target carrier among all the aforementioned initial carriers, and all the aforementioned initial carriers are arranged from low frequency to high frequency; determining a target index based on the aforementioned relative index and the aforementioned preset coefficient value; and performing an exponential operation using the natural constant as the base and the aforementioned target index as the exponent to obtain the aforementioned phase rotation factor corresponding to the aforementioned target carrier.

[0135] Optionally, obtaining the preset coefficient value includes: obtaining the number of all the aforementioned basic carriers within the aforementioned operating frequency band to obtain the target number; and determining the preset coefficient value as the integer power of the preset constant closest to the target number.

[0136] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0137] Step S201: Determine multiple base carriers within the operating frequency band, wherein the multiple base carriers are aggregated and used, and a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping. The first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use.

[0138] Step S202: Determine the phase rotation factors corresponding to the above-mentioned multiple basic carriers respectively;

[0139] Step S203: Based on the phase rotation factors corresponding to the aforementioned multiple base carriers, the first synchronization signal on the corresponding base carrier is phase rotated to obtain the first processed signal of the corresponding base carrier, wherein at least two of the aforementioned first processed signals have different peak positions.

[0140] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0141] Optionally, the above-mentioned phase rotation of the first synchronization signal on the corresponding basic carrier according to the phase rotation factors corresponding to the plurality of basic carriers to obtain the first processing signal of the corresponding basic carrier includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers with the first synchronization signal on the corresponding basic carrier to obtain the first processing signal of the corresponding basic carrier.

[0142] Optionally, the second synchronization signal is mapped onto one of the aforementioned basic carriers in the frequency domain, the transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal, and the method further includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the second synchronization signal on the corresponding basic carrier to obtain the second processed signal of the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0143] Optionally, the above method further includes: obtaining a local signal of the signal receiver corresponding to the basic carrier, wherein the local signal is a local signal of the signal receiver used for channel estimation; performing phase rotation on the local signal according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor; and performing channel estimation on the channel corresponding to the basic carrier according to the second processed signal and the third processed signal.

[0144] Optionally, a second synchronization signal and a synchronization signaling symbol are also mapped onto one of the aforementioned basic carriers. The synchronization signaling symbol is a symbol sequence and includes system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The method further includes: multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the second synchronization signal on the corresponding basic carrier to obtain a second processed signal for the corresponding basic carrier; and multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the synchronization signaling symbol on the corresponding basic carrier to obtain a fourth processed signal for the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0145] Optionally, determining the phase rotation factor corresponding to each of the aforementioned multiple basic carriers includes: obtaining a preset coefficient value and a relative index of the target carrier, wherein the target carrier is any one of the aforementioned basic carriers, and the relative index is the arrangement index of the target carrier among all the aforementioned initial carriers, and all the aforementioned initial carriers are arranged from low frequency to high frequency; determining a target index based on the aforementioned relative index and the aforementioned preset coefficient value; and performing an exponential operation using the natural constant as the base and the aforementioned target index as the exponent to obtain the aforementioned phase rotation factor corresponding to the aforementioned target carrier.

[0146] Optionally, obtaining the preset coefficient value includes: obtaining the number of all the aforementioned basic carriers within the aforementioned operating frequency band to obtain the target number; and determining the preset coefficient value as the integer power of the preset constant closest to the target number.

[0147] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0148] Step S201: Determine multiple base carriers within the operating frequency band, wherein the multiple base carriers are aggregated and used, and a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping. The first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use.

[0149] Step S202: Determine the phase rotation factors corresponding to the above-mentioned multiple basic carriers respectively;

[0150] Step S203: Based on the phase rotation factors corresponding to the aforementioned multiple base carriers, the first synchronization signal on the corresponding base carrier is phase rotated to obtain the first processed signal of the corresponding base carrier, wherein at least two of the aforementioned first processed signals have different peak positions.

[0151] Optionally, the above-mentioned phase rotation of the first synchronization signal on the corresponding basic carrier according to the phase rotation factors corresponding to the plurality of basic carriers to obtain the first processing signal of the corresponding basic carrier includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers with the first synchronization signal on the corresponding basic carrier to obtain the first processing signal of the corresponding basic carrier.

[0152] Optionally, the second synchronization signal is mapped onto one of the aforementioned basic carriers in the frequency domain, the transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal, and the method further includes: multiplying the phase rotation factors corresponding to the plurality of basic carriers respectively with the second synchronization signal on the corresponding basic carrier to obtain the second processed signal of the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0153] Optionally, the above method further includes: obtaining a local signal of the signal receiver corresponding to the basic carrier, wherein the local signal is a local signal of the signal receiver used for channel estimation; performing phase rotation on the local signal according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor; and performing channel estimation on the channel corresponding to the basic carrier according to the second processed signal and the third processed signal.

[0154] Optionally, a second synchronization signal and a synchronization signaling symbol are also mapped onto one of the aforementioned basic carriers. The synchronization signaling symbol is a symbol sequence and includes system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The method further includes: multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the second synchronization signal on the corresponding basic carrier to obtain a second processed signal for the corresponding basic carrier; and multiplying the phase rotation factors corresponding to the aforementioned multiple basic carriers with the synchronization signaling symbol on the corresponding basic carrier to obtain a fourth processed signal for the corresponding basic carrier, wherein at least two of the aforementioned second processed signals have different peak positions.

[0155] Optionally, determining the phase rotation factor corresponding to each of the aforementioned multiple basic carriers includes: obtaining a preset coefficient value and a relative index of the target carrier, wherein the target carrier is any one of the aforementioned basic carriers, and the relative index is the arrangement index of the target carrier among all the aforementioned initial carriers, and all the aforementioned initial carriers are arranged from low frequency to high frequency; determining a target index based on the aforementioned relative index and the aforementioned preset coefficient value; and performing an exponential operation using the natural constant as the base and the aforementioned target index as the exponent to obtain the aforementioned phase rotation factor corresponding to the aforementioned target carrier.

[0156] Optionally, obtaining the preset coefficient value includes: obtaining the number of all the aforementioned basic carriers within the aforementioned operating frequency band to obtain the target number; and determining the preset coefficient value as the integer power of the preset constant closest to the target number.

[0157] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0158] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0159] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0160] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0161] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0162] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0163] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0164] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0165] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0166] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0167] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0168] 1) The signal processing method described in this application first determines multiple fundamental carriers within the operating frequency band, wherein the multiple fundamental carriers are aggregated and used. A first synchronization signal is mapped onto a fundamental carrier through frequency domain mapping. The first synchronization signal is used for frame detection of synchronization information block frames on the fundamental carrier, which is the initial carrier currently in use. Then, the phase rotation factor corresponding to each fundamental carrier is determined. Finally, the phase of the first synchronization signal on the corresponding fundamental carrier is rotated according to the phase rotation factor to obtain a first processed signal for the fundamental carrier. At least two of the first processed signals have different peak positions. This method performs specific phase rotation on the synchronization signals of different fundamental carriers. Without affecting the time-domain characteristics of the synchronization signal, it can significantly reduce the peak-to-average power ratio (PAPR) of the synchronization signal during multi-carrier aggregation, solving the problem of excessively high PAPR and low energy conversion efficiency in the prior art when multiple fundamental carriers are aggregated for transmission.

[0169] 2) The signal processing apparatus of this application includes a first determining unit, a second determining unit, and a processing unit. The first determining unit is used to determine multiple fundamental carriers within the operating frequency band, wherein the multiple fundamental carriers are aggregated and used, and a first synchronization signal is mapped onto a fundamental carrier through frequency domain mapping. The first synchronization signal is used for frame detection of synchronization information block frames on the fundamental carrier, and the fundamental carrier is the initial carrier currently in use. The second determining unit is used to determine the phase rotation factor corresponding to each fundamental carrier. The processing unit is used to perform phase rotation on the first synchronization signal on the corresponding fundamental carrier according to the phase rotation factor to obtain a first processed signal of the fundamental carrier, wherein at least two first processed signals have different peak positions. This apparatus performs specific phase rotation on the synchronization signals of different fundamental carriers, which can significantly reduce the peak-to-average power ratio of the synchronization signal when multiple carriers are aggregated without affecting the time-domain characteristics of the synchronization signal. This solves the problem of excessively high peak-to-average power ratio and low energy conversion efficiency when multiple fundamental carriers are aggregated for transmission in the prior art.

[0170] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A signal processing method, characterized by, include: Multiple base carriers within the operating frequency band are identified, wherein the multiple base carriers are aggregated and used, and a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping. The first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use. Determine the phase rotation factors corresponding to the plurality of basic carriers respectively; The phase rotation of the first synchronization signal on the corresponding basic carrier is performed according to the phase rotation factor corresponding to the plurality of basic carriers respectively, to obtain the first processed signal of the corresponding basic carrier, wherein at least two of the first processed signals have different peak positions; Determining the phase rotation factors corresponding to the plurality of fundamental carriers includes: Obtain the preset coefficient value and the relative sequence number of the target carrier, wherein the target carrier is any one of the base carriers, and the relative sequence number is the arrangement sequence number of the target carrier among all the initial carriers, and all the initial carriers are arranged from low frequency to high frequency; The target index is determined based on the relative sequence number and the preset coefficient value; Using the natural constant as the base and the target index as the exponent, an exponential operation is performed to obtain the phase rotation factor corresponding to the target carrier.

2. The method of claim 1, wherein, The step of performing phase rotation on the first synchronization signal on the corresponding basic carrier according to the phase rotation factors corresponding to the plurality of basic carriers to obtain the first processed signal of the corresponding basic carrier includes: The phase rotation factor corresponding to each of the plurality of basic carriers is multiplied by the first synchronization signal on the corresponding basic carrier to obtain the first processed signal of the corresponding basic carrier.

3. The method of claim 1, wherein, The second synchronization signal is frequency-domain mapped onto a fundamental carrier, the transmission time of the first synchronization signal is earlier than the transmission time of the second synchronization signal, and the method further includes: The phase rotation factor corresponding to each of the plurality of base carriers is multiplied by the second synchronization signal on the corresponding base carrier to obtain the second processed signal of the corresponding base carrier, wherein at least two of the second processed signals have different peak positions.

4. The method of claim 3, wherein, The method further includes: Obtain the local signal of the signal receiving end corresponding to the basic carrier, wherein the local signal is the local signal of the signal receiving end used for channel estimation; The local signal is phase-rotated according to the corresponding phase rotation factor to obtain a third processed signal, wherein the third processed signal is the product of the local signal and the phase rotation factor; The channel estimation is performed on the channel corresponding to the basic carrier based on the second processing signal and the third processing signal.

5. The method of claim 1, wherein, A second synchronization signal and synchronization signaling symbols are also mapped onto one of the base carriers. The synchronization signaling symbols are symbol sequences, and the synchronization signaling symbols include system configuration parameters. The system configuration parameters are used at least for multi-carrier aggregation access, signal demodulation, and resource scheduling processing. The method further includes: The phase rotation factors corresponding to the plurality of base carriers are multiplied by the second synchronization signal on the corresponding base carrier to obtain the second processing signal of the corresponding base carrier. The phase rotation factors corresponding to the plurality of base carriers are multiplied by the synchronization signaling symbol on the corresponding base carrier to obtain the fourth processing signal of the corresponding base carrier. The peak positions of at least two of the second processing signals are different.

6. The method according to claim 1, characterized in that, Obtain preset coefficient values, including: The target quantity is obtained by acquiring the number of all the basic carriers within the operating frequency band. The preset coefficient value is determined by raising the integer power of the preset constant that is closest to the target quantity.

7. A signal processing apparatus, characterized in that, include: The first determining unit is used to determine multiple base carriers within the operating frequency band, wherein the multiple base carriers are aggregated and used, a first synchronization signal is mapped onto one of the base carriers through frequency domain mapping, the first synchronization signal is used for signal synchronization header detection, and the base carrier is the initial carrier currently in use. The second determining unit is used to determine the phase rotation factors corresponding to the plurality of basic carriers respectively; The processing unit is configured to perform phase rotation on the first synchronization signal on the corresponding basic carrier according to the phase rotation factor corresponding to the plurality of basic carriers respectively, so as to obtain the first processed signal of the corresponding basic carrier, wherein at least two of the first processed signals have different peak positions. The second determining unit includes a second acquisition module, a first determining module, and a fifth processing module. The second acquisition module is used to acquire a preset coefficient value and a relative sequence number of the target carrier. The target carrier is any one of the base carriers, and the relative sequence number is the arrangement number of the target carrier among all the initial carriers, which are arranged from low frequency to high frequency. The first determining module is used to determine a target index based on the relative sequence number and the preset coefficient value. The fifth processing module is used to perform exponential operations using the natural constant as the base and the target index as the exponent to obtain the phase rotation factor corresponding to the target carrier.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the signal processing method according to any one of claims 1 to 5.

9. An electronic device, characterized in that, include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including methods for performing the signal processing method according to any one of claims 1 to 5.

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