CN116170095A

CN116170095A - Information measurement method, device, terminal and readable storage medium

Info

Publication number: CN116170095A
Application number: CN202111402746.1A
Authority: CN
Inventors: 程执天; 王笑千; 孙志雯
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2023-05-26
Also published as: WO2023093587A1

Abstract

The application discloses an information measurement method, an information measurement device, a terminal and a readable storage medium, and belongs to the technical field of communication. The information measurement method of the embodiment of the application comprises the following steps: determining a waveform of the received signal; determining a plurality of candidate cutting ratios corresponding to the waveform, and determining a performance index of the received signal under each candidate cutting ratio; selecting a target clipping ratio from the plurality of candidate clipping ratios according to the performance index of the received signal under each candidate clipping ratio and a preset performance index requirement; and determining the channel quality information corresponding to the target cut ratio as target channel quality information. According to the scheme in the embodiment of the application, the channel quality information can be accurately determined.

Description

Information measurement method, device, terminal and readable storage medium

Technical Field

The application belongs to the technical field of communication, and particularly relates to an information measurement method, an information measurement device, a terminal and a readable storage medium.

Background

In the existing communication system, in order to adapt to the changing channel, a set of adaptive modulation coding (Adaptive Modulation and Coding, AMC) procedures are defined: the terminal firstly estimates a channel matrix according to a reference Signal, and estimates a Signal-to-Noise Ratio (SNR) or a Signal-to-interference-and-Noise Ratio (Signal to Interference plus Noise Ratio, SINR) by adopting a receiving algorithm according to the estimated channel matrix; and then determining channel quality information according to the SNR or the SINR, and reporting the channel quality information to the base station, so that the base station uses proper modulation and coding strategies (Modulation and Coding Scheme, MCS) for the terminal to send signals according to the channel quality information and network conditions reported by the terminal. In this case, noise generated by clipping affects signal quality, which may cause deviation in SNR or SINR estimated by the terminal, and thus the terminal may not accurately determine channel quality information.

Disclosure of Invention

An objective of the embodiments of the present application is to provide an information measurement method, an information measurement device, a terminal, and a readable storage medium, so as to solve the problem that the terminal cannot accurately determine channel quality information in a clipping scenario at present.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, there is provided an information measurement method, including:

determining a waveform of the received signal;

determining a plurality of candidate cutting ratios corresponding to the waveform, and determining a performance index of the received signal under each candidate cutting ratio;

selecting a target clipping ratio from the plurality of candidate clipping ratios according to the performance index of the received signal under each candidate clipping ratio and a preset performance index requirement;

and determining the channel quality information corresponding to the target cut ratio as target channel quality information.

In a second aspect, there is provided an information measurement apparatus including:

a first determining module for determining a waveform of the received signal;

a second determining module, configured to determine a plurality of candidate clipping ratios corresponding to the waveforms, and determine a performance index of the received signal under each of the candidate clipping ratios;

the selecting module is used for selecting a target cutting ratio from the plurality of candidate cutting ratios according to the performance index of the received signal under each candidate cutting ratio and the preset performance index requirement;

and a third determining module, configured to determine the channel quality information corresponding to the target clipping ratio as target channel quality information.

In a third aspect, there is provided a terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, the program or instruction when executed by the processor implementing the steps of the method according to the first aspect.

In a fourth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor perform the steps of the method according to the first aspect.

In this embodiment of the present application, the terminal may determine a waveform of a received signal, determine a plurality of candidate clipping ratios corresponding to the waveform, determine a performance index of the received signal under each candidate clipping ratio, select a target clipping ratio from the plurality of candidate clipping ratios according to the performance index of the received signal under each candidate clipping ratio and a preset performance index requirement, and determine channel quality information corresponding to the target clipping ratio as target channel quality information. Therefore, the influence of the cut-off ratio on the channel quality information is considered when the terminal determines the channel quality information, so that the channel quality information is accurately determined. Further, when the target channel quality information is reported, the accuracy of the channel quality information fed back by the terminal in the clipping scene can be improved, so that the base station uses a proper MCS for the terminal to send signals, and the transmission performance of the sent signals is improved.

Drawings

Fig. 1 is a flowchart of an information measurement method provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of an information measurement device according to an embodiment of the present application;

fig. 3 is one of schematic structural diagrams of a terminal according to an embodiment of the present application;

fig. 4 is a second schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

To facilitate an understanding of the embodiments of the present application, the following is first described.

Optionally, the scenario to which the embodiments of the present application are adapted includes, but is not limited to, a visible light communication system, and the like.

In a visible Light communication system, a linear operation region of a Light-Emitting Diode (LED) or a Laser Diode (LD) is very limited, for example, for an LED/LD having a linear operation region of [0, a ], an input electric signal is limited to 0 when it is less than 0 or limited to a when it is greater than a, and thus nonlinear distortion of the electric signal occurs, which is called clipping, and noise generated is called clipping noise. For an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) system, the data signal is generated in the frequency domain and typically features a peak-to-average ratio in the time domain, so clipping noise is easily generated for LEDs/LDs with very small linear operating regions. In indoor scenes, the effect of clipping noise on signal quality is great and cannot be ignored because the channel is relatively stable. However, if a terminal in a visible light communication system determines channel quality information, such as channel quality indication (Channel Quality Indicator, CQI) in a 5G New Radio (NR), based on only a channel estimation result of a reference signal, clipping noise caused by an LED/LD is ignored, thereby making it impossible to accurately determine the channel quality information. On the other hand, the reference signal generally has a fixed modulation type, irrespective of the modulation type used for the data signal, and the clip noise is dependent on the modulation type, so that the channel estimation result of the reference signal hardly provides a reference for the clip noise estimation of the data signal. Therefore, the terminal determines channel quality information from only the channel estimate of the reference signal is inaccurate, requiring consideration of clipping noise.

The information measuring method, the device, the terminal and the readable storage medium provided by the embodiment of the application are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a flowchart of an information measurement method provided in an embodiment of the present application, where the method is applied to a terminal, as shown in fig. 1, and the method includes the following steps:

step 11: a waveform of the received signal is determined.

In this embodiment, the terminal may determine the waveform of the received signal based on the indication of the network side device and/or the preset signal characteristics, etc.

In some embodiments, the waveform of the received signal may be Direct-offset optical frequency division multiplexing (Direct-Current biased Optical Orthogonal Frequency-Division Multiplexing, DCO-OFDM), asymmetric limited optical frequency division multiplexing (Asymmetrically Clipped Optical Orthogonal Frequency-Division Multiplexing, ACO-OFDM), or the like.

Step 12: and determining a plurality of candidate cutting ratios corresponding to the waveforms, and determining the performance index of the received signal under each candidate cutting ratio.

Optionally, the channel quality information in this embodiment may include at least one of the following: CQI, wavelength quality indication WQI, color channel quality indication, etc.

Alternatively, the terminal may determine a plurality of candidate clipping ratios corresponding to the waveforms based on a predefined or configured channel quality information table, such as a CQI table. In the predefined or configured channel quality information table, each row represents a transmission scheme including modulation type, code rate, candidate cut ratio, etc.

In some embodiments, taking the CQI table as an example, a column of clipping ratios may be added as a reference for measuring CQI under all waveforms, or a plurality of columns of clipping ratios may be added as a reference for measuring CQI under different waveforms, or each waveform corresponds to a different CQI table, where a column of clipping ratios is included in the CQI table. In the CQI table, the clipping ratio given by each row refers to the optimal clipping ratio corresponding to the modulation coding scheme corresponding to the row, and the optimal meaning refers to that when the UE assumes that the transmitting end transmits a signal by using the modulation coding scheme and the clipping ratio corresponding to the row, the received signal can meet the performance index requirement, for example, the block error rate is less than or equal to 0.1; and the larger the CQI index is, the higher the modulation order or the higher the code rate is, and the larger the corresponding clipping ratio is.

For example, a CQI table corresponding to a certain waveform (e.g., waveform 1) may be shown in table 1 below:

TABLE 1

Based on table 1, after determining that the waveform of the received signal is waveform 1, a plurality of candidate clipping ratios corresponding to the waveform 1 may be determined as the last column of table 1, i.e., {1,1.2,1.3,1.4, …,2.5}.

For another example, a table of CQI for each column clip ratio as a different waveform, respectively, may be as shown in table 2 below:

TABLE 2

Based on table 2, after determining that the waveform of the received signal is DCO-OFDM, a plurality of candidate clipping ratios corresponding to the DCO-OFDM may be determined as the penultimate columns of table 2, i.e., {1,1.2,1.3, …,2.4,2.5}; after determining that the waveform of the received signal is ACO-OFDM, the candidate clipping ratios corresponding to the ACO-OFDM may be determined as the last column in table 2, i.e., {1.3,1.4,1.5, …,2.8,3}.

Step 13: and selecting a target chopping ratio from a plurality of candidate chopping ratios according to the performance index of the received signal under each candidate chopping ratio and the preset performance index requirement.

Alternatively, the definition of the chopping ratio may be any of the following:

1) The ratio of the variance of the signal before clipping to the clipping interval, or the ratio of the clipping interval to the variance of the signal before clipping, is the difference between the clipping upper limit value and the clipping lower limit value. For example, if the clipping range is [ A, B ], the corresponding clipping interval is B-A.

2) The ratio of the number of samples the signal is truncated to the total number of samples. For example, the ratio may be a ratio of the number of samples the signal is truncated to the total number of samples during one or more OFDM symbol periods.

3) The ratio of the difference between the signal energy (or power) before and after the clipping and the signal energy (or power) before the clipping. For example, the ratio may be a ratio of a difference between signal energy (or power) before and after the clipping and signal energy (or power) before the clipping in one or more OFDM symbol periods.

It should be noted that the performance index may include at least one of the following: block error rate (BLER), bit Error Rate (BER), throughput, spectral efficiency, etc. The preset performance index requirement may be preset based on actual requirements, which is not limited.

Step 14: and determining the channel quality information corresponding to the target clipping ratio as target channel quality information.

In some embodiments, a correspondence between the clipping ratio and the channel quality information may be established to determine the channel quality information corresponding to the target clipping ratio as target channel quality information after selecting the target clipping ratio. For channel quality information, the index indication, such as the CQI table described above, may be based.

For example, in the case of table 1, if the target cut ratio is 1.6, it is possible to determine that the CQI indicated by the CQI index 6 corresponding to the target cut ratio 1.6 is the target CQI.

For another example, in the case of the signal waveform of DCO-OFDM, and the target cut ratio selected is 2, it is possible to determine that the CQI indicated by the CQI index 10 corresponding to the target cut ratio 2 is the target CQI; alternatively, if the signal waveform is ACO-OFDM and the selected target cut ratio is 1.7, it may be determined that the CQI indicated by CQI index 5 corresponding to the target cut ratio of 1.7 is the target CQI.

According to the information measurement method, a terminal can determine the waveform of a received signal, determine a plurality of candidate clipping ratios corresponding to the waveform, determine performance indexes of the received signal under each candidate clipping ratio, select a target clipping ratio from the plurality of candidate clipping ratios according to the performance indexes of the received signal under each candidate clipping ratio and preset performance index requirements, and determine channel quality information corresponding to the target clipping ratio as target channel quality information. Therefore, the influence of clipping noise on the channel quality information is considered when the terminal determines the channel quality information, so that the channel quality information is accurately determined.

Further, when the target channel quality information is reported, the accuracy of the channel quality information fed back by the terminal in the clipping scene can be improved, so that the base station uses a proper MCS for the terminal to send signals, and the transmission performance of the sent signals is improved.

In this embodiment of the present application, the clipping ratio may be predefined, or may be configured by a network side device, such as a base station, which is not limited.

In some embodiments, the clip ratio/candidate clip ratio may be indicated by a set of clip ratios and a clip ratio index. The set of clipping ratios and the clipping ratio index may be predefined or network side configured, wherein the network side configuration may comprise a higher layer signaling configuration and/or a downlink control information (Downlink Control Information, DCI) indication, etc. For example, for the set of clipping ratios k= { k1, …, kN }, clipping ratio indices 0 to N-1 correspond to the clipping ratios k1 to kN, respectively, and the corresponding clipping ratios can be indicated by means of the clipping ratio indices.

In some embodiments, the clip ratio may be indicated by a clip ratio quantization value. The cut-ratio quantization value may be included in DCI and transmitted on a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) or a physical downlink control channel (Physical Downlink Control Channel, PDCCH). For example, taking quantization accuracy of 2 bits as an example, the correspondence between the quantized value and the actual value of the clipping ratio may be as shown in table 3 below:

TABLE 3 Table 3

Quantized value of cutting ratio	Actual value of clip ratio
		00	2
01	2.5
		10	3
11	3.5

In the embodiment of the application, when determining the performance index of the received signal under each candidate cutting ratio, the performance index may be determined by combining the signal-to-noise ratio of the received signal under each candidate cutting ratio. The determining the performance index of the received signal at each candidate chopping ratio may include: firstly, calculating the signal-to-noise ratio of the received signal under each candidate cutting ratio; and then, determining the performance index of the received signal under each candidate cutting ratio according to the corresponding relation between the performance index and the signal-to-noise ratio under each candidate cutting ratio and the signal-to-noise ratio of the received signal under each candidate cutting ratio. In this way, the influence of clipping noise to the signal-to-noise ratio can be considered, so that the target channel quality information can be accurately determined when the target channel quality information is determined based on the signal-to-noise ratio.

In some embodiments, the signal-to-noise ratio may also be selected as the signal-to-interference-and-noise ratio.

Optionally, when selecting the target clipping ratio from the plurality of candidate clipping ratios according to the performance index of the received signal under each candidate clipping ratio and the preset performance index requirement, the terminal may first select the first candidate clipping ratio from the plurality of candidate clipping ratios according to the performance index of the received signal under each candidate clipping ratio and the preset performance index requirement; wherein, the performance index of the received signal under the first candidate cutting ratio meets the preset performance index requirement; then, when the first candidate clipping ratio includes one candidate clipping ratio, determining the first candidate clipping ratio as a target index; alternatively, when the first candidate clip ratio includes a plurality of candidate clip ratios, a maximum one of the plurality of candidate clip ratios included in the first candidate clip ratio is determined as the target index. In this way, the higher the candidate cut ratio is, the higher the modulation order or the higher the code rate of the corresponding signal is, and when the performance index requirement is satisfied, the maximum one of the plurality of candidate cut ratios is determined as the target cut ratio, so that the spectrum efficiency can be improved.

In some embodiments, taking the waveform as DCO-OFDM, the performance index as the block error rate, and the channel quality information as the CQI as an example, if the terminal receives the DCO-OFDM transmission block sent by using the modulation coding scheme and the clipping ratio corresponding to the corresponding candidate clipping ratio, the plurality of candidate clipping ratios can make the block error rate not exceed the target block error rate, i.e. meet the preset performance index requirement, and then the maximum candidate clipping ratio can be determined as the target clipping ratio under the DCO-OFDM waveform.

Alternatively, the terminal may determine the signal-to-noise ratio of the received signal based on the desired signal, clipping noise, and other noise in the received signal. The information measurement method further comprises the following steps:

the method comprises the steps that a terminal obtains variance of a first signal, wherein the first signal is a signal before clipping of a sending signal corresponding to a receiving signal; for example, the terminal may directly obtain the variance of the first signal from the network side device, such as the base station, or determine the variance of the first signal according to the clipping ratio and the clipping interval after obtaining the clipping interval from the network side device, such as the base station;

the terminal estimates the channel gain according to the received reference signal; for example, the reference signals may include, but are not limited to, channel state information reference signals (Channel State Information Reference Signal, CSI-RS), etc.; as for the channel gain estimation method, an existing method may be adopted, and is not particularly limited herein;

the terminal determines the variance of the first noise in the received signal according to the estimated channel gain; the first noise is other noise than clipping noise in the received signal, such as relative intensity noise, shot noise, thermal noise, etc. generated by the terminal, and interference from other light sources or users, etc.

Further, the process of calculating the signal-to-noise ratio of the received signal at each candidate cutting ratio includes: firstly, determining clipping gain and a first coefficient under each candidate clipping ratio according to each candidate clipping ratio; the first coefficient is a coefficient of variance of clipping noise; secondly, determining the variance of the useful signal in the received signal at each candidate cutting ratio according to the variance of the first signal, the channel gain and the clipping gain at each candidate cutting ratio; then, determining a variance of clipping noise in the received signal at each candidate clipping ratio based on the variance of the first signal, the channel gain, and the first coefficient at each candidate clipping ratio; finally, the signal-to-noise ratio of the received signal at each candidate clipping ratio is calculated from the variance of the first noise, and the variance of the useful signal and the variance of the clipping noise at each candidate clipping ratio.

Wherein, at each candidate clipping ratio, the sum of the variance of the first noise and the variance of the corresponding clipping noise is the total noise variance in the received signal. The ratio of the variance of the useful signal to the total noise variance is the signal-to-noise ratio of the received signal for each candidate clipping ratio.

In some embodiments, the clipping gain and the first coefficient under each candidate clipping ratio may be determined according to the clipping ratio k and the first function value corresponding to each candidate clipping ratio; wherein the first function value represents a probability that a random variable compliant with the normal distribution is greater than the clip ratio k, and is a value of a first function Q (k) representing a right-tail function of the normal distribution. The clipping noise depends on the clipping probability, which is related to the Q function value of the clipping ratio.

In some embodiments, in order to accurately estimate the channel gain, the reference signal at the signal transmitting end may satisfy at least one of the following conditions: a non-negative real signal; the amplitude does not exceed the linear working area of the signal transmitting end; generated in the time domain and time-multiplexed with the transmit signal. For example, for a visible light communication system, the requirements of the reference signal transmitted by the visible light communication system may include: a non-negative real signal, a linear operating region (or referred to as a clipping region) of an optical transmission device (LED or LD) that does not exceed the amplitude, and a signal that is generated in the time domain and time-multiplexed with the transmitted signal. If the linear operating region of the optical transmitting device is [ a, B ], for example, the amplitude of the reference signal cannot be smaller than a or larger than B.

The process of calculating the signal-to-noise ratio of the received signal at each candidate chopping ratio is specifically described below.

S1: the terminal obtains a variance d of a first signal from a base station;

s2: the terminal obtains a channel gain h through channel estimation according to the received CSI-RS;

s3: for each candidate cutting ratio, the terminal calculates a cutting gain G and a first coefficient G according to the cutting ratio k; wherein g=1-Q (k);

q (k) represents the probability that the random variable obeying the standard normal distribution is greater than the clip ratio k;

s4: the terminal calculates the variance D1 of the useful signal: d1 =d×h×g; * Representing the product.

S5: the terminal determines the variance D2 of the clipping noise: d2 =gd1×h;

s6: the terminal determines the variance D3 of the first noise, i.e. the noise other than the clipping noise, from the channel estimate.

S7: signal-to-noise ratio SNR is determined from D1, D2, D3: snr=d1/(d2+d3).

It should be noted that, in the information measurement method provided in the embodiment of the present application, the execution body may be an information measurement device, or a control module in the information measurement device for executing the information measurement method. In the embodiment of the present application, an information measuring apparatus that is provided in the embodiment of the present application is described by taking an example in which the information measuring apparatus performs an information measuring method.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an information measurement device provided in an embodiment of the present application, where the device is applied to a terminal, as shown in fig. 2, the information measurement device 20 may include:

a first determining module 21 for determining a waveform of the received signal;

a second determining module 22, configured to determine a plurality of candidate clipping ratios corresponding to the waveforms, and determine a performance index of the received signal under each of the candidate clipping ratios;

a selecting module 23, configured to select a target clipping ratio from the plurality of candidate clipping ratios according to a performance index of the received signal at each candidate clipping ratio and a preset performance index requirement;

a third determining module 24 is configured to determine the channel quality information corresponding to the target clipping ratio as target channel quality information.

Optionally, the second determining module 22 includes:

a calculation unit configured to calculate a signal-to-noise ratio of the received signal at each of the candidate chopping ratios;

and the first determining unit is used for determining the performance index of the received signal under each candidate cutting ratio according to the corresponding relation between the performance index and the signal-to-noise ratio under each candidate cutting ratio and the signal-to-noise ratio of the received signal under each candidate cutting ratio.

Optionally, the selecting module 23 includes:

a selecting unit, configured to select a first candidate clipping ratio from the plurality of candidate clipping ratios according to a performance index of the received signal under each candidate clipping ratio and a preset performance index requirement; wherein the performance index of the received signal under the first candidate chopping ratio meets the preset performance index requirement;

a second determining unit configured to determine the first candidate clipping ratio as the target clipping ratio when the first candidate clipping ratio includes one candidate clipping ratio; alternatively, when the first candidate clip ratio includes a plurality of candidate clip ratios, a largest one of the plurality of candidate clip ratios included in the first candidate clip ratio is determined as the target clip ratio.

Optionally, the information measuring apparatus 20 further includes:

an acquisition module for acquiring a variance of the first signal; the first signal is a signal before clipping of a transmission signal corresponding to the received signal;

an estimation module, configured to estimate a channel gain according to the received reference signal;

a fourth determining module, configured to determine a variance of the first noise in the received signal according to the channel gain; wherein the first noise is other noise than clipping noise in the received signal.

Further, the computing unit is specifically configured to: determining clipping gain and a first coefficient under each candidate cutting ratio according to each candidate cutting ratio; wherein the first coefficient is a coefficient of variance of clipping noise in the received signal; determining a variance of a useful signal in the received signal at each of the candidate clipping ratios based on the variance of the first signal, the channel gain, and the clipping gain at each of the candidate clipping ratios; determining a variance of clipping noise in the received signal at each of the candidate clipping ratios based on the variance of the first signal, the channel gain, and a first coefficient at each of the candidate clipping ratios; and calculating the signal-to-noise ratio of the received signal at each candidate cutting ratio according to the variance of the first noise, the variance of the useful signal at each candidate cutting ratio and the variance of the clipping noise.

Optionally, the computing unit is specifically configured to: determining clipping gain and a first coefficient under each candidate cutting ratio according to each candidate cutting ratio and a first function value; wherein the first function value represents a probability that a random variable obeying a standard normal distribution is greater than a clipping ratio.

Optionally, for the reference signal of the signal transmitting end, at least one of the following conditions is satisfied:

a non-negative real signal;

the amplitude does not exceed the linear working area of the signal transmitting end;

generated in the time domain and time-multiplexed with the transmit signal.

Optionally, the chopping ratio is any one of the following:

the ratio of the variance of the signal before clipping to the clipping interval; wherein the clipping interval is the difference between the clipping upper limit value and the clipping lower limit value;

the ratio of the number of samples of the signal being shaved to the total number of samples;

the ratio of the difference between the signal energy of the front and back of the cutting front to the signal energy of the cutting front.

Optionally, the candidate clipping ratio is indicated by at least one of:

introducing a row indication by a set of clip ratios and a clip ratio index;

the indication is made by a wavelet ratio quantization value.

Optionally, the channel quality information includes at least one of:

channel quality indication CQI, wavelength quality indication WQI, color channel quality indication.

The information measuring device 20 in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device may be a mobile electronic device or a non-mobile electronic device. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), and the like, and the non-mobile electronic device may be a personal computer (personal computer, PC), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not limited in particular.

The information measuring apparatus 20 in the embodiment of the present application may be an apparatus having an operating system. The operating system may be an Android operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.

The information measuring apparatus 20 of the embodiment of the present application may implement each process of the method embodiment shown in fig. 1 and achieve the same technical effects, and in order to avoid repetition, the description is omitted here.

Optionally, as shown in fig. 3, the embodiment of the present application further provides a terminal 30, including a processor 31, a memory 32, and a program or an instruction stored in the memory 32 and capable of running on the processor 31, where the program or the instruction implements each process of the embodiment of the information measurement method when executed by the processor 31, and the process can achieve the same technical effect, so that repetition is avoided, and no further description is given here.

Referring to fig. 4, the embodiment of the present application further provides a terminal 40, which includes a bus 41, a transceiver 42, an antenna 43, a bus interface 44, a processor 45, and a memory 46.

In the embodiment of the present application, the terminal 40 further includes: programs or instructions stored on memory 46 and executable on processor 45. Alternatively, the program or instructions may implement the following steps when executed by the processor 45:

determining a waveform of the received signal;

It will be appreciated that the program or the instructions, when executed by the processor 45, may implement the processes of the method embodiment shown in fig. 1 and achieve the same technical effects, and are not repeated herein.

In fig. 4, a bus architecture (represented by bus 41), the bus 41 may comprise any number of interconnected buses and bridges, with the bus 41 linking together various circuits, including one or more processors, represented by processor 45, and memory, represented by memory 46. The bus 41 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. Bus interface 44 provides an interface between bus 41 and transceiver 42. The transceiver 42 may be one element or may be a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 45 is transmitted over a wireless medium via the antenna 43, and further, the antenna 43 receives data and transmits the data to the processor 45.

The processor 45 is responsible for managing the bus 41 and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 46 may be used to store data used by processor 45 in performing operations.

Alternatively, the processor 45 may be CPU, ASIC, FPGA or a CPLD.

The embodiment of the present application further provides a readable storage medium, on which a program or an instruction is stored, where the program or the instruction can implement each process of the embodiment of the method shown in fig. 1 and achieve the same technical effects when executed by a processor, and in order to avoid repetition, a detailed description is omitted herein.

Computer-readable media include both permanent and non-permanent, removable and non-removable media, and information storage may be implemented by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer 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 technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a service classification device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.

Claims

1. An information measurement method applied to a terminal, comprising:

determining a waveform of the received signal;

2. The method of claim 1, wherein said determining a performance indicator for said received signal at each of said candidate wavelet ratios comprises:

calculating the signal-to-noise ratio of the received signal at each of the candidate chopping ratios;

and determining the performance index of the received signal under each candidate cutting ratio according to the corresponding relation between the performance index and the signal-to-noise ratio under each candidate cutting ratio and the signal-to-noise ratio of the received signal under each candidate cutting ratio.

3. The method of claim 1, wherein said selecting a target clipping ratio from said plurality of candidate clipping ratios based on a performance indicator of said received signal at each of said candidate clipping ratios and a preset performance indicator requirement comprises:

selecting a first candidate clipping ratio from the plurality of candidate clipping ratios according to the performance index of the received signal under each candidate clipping ratio and a preset performance index requirement; wherein the performance index of the received signal under the first candidate chopping ratio meets the preset performance index requirement;

determining the first candidate clipping ratio as the target clipping ratio when the first candidate clipping ratio includes one candidate clipping ratio; alternatively, when the first candidate clip ratio includes a plurality of candidate clip ratios, a largest one of the plurality of candidate clip ratios included in the first candidate clip ratio is determined as the target clip ratio.

4. The method according to claim 2, wherein the method further comprises:

acquiring a variance of the first signal; the first signal is a signal before clipping of a transmission signal corresponding to the received signal;

estimating channel gain according to the received reference signal;

determining a variance of a first noise in the received signal based on the channel gain; wherein the first noise is other noise than clipping noise in the received signal;

wherein said calculating a signal-to-noise ratio of said received signal at each of said candidate wavelet ratios comprises:

determining clipping gain and a first coefficient under each candidate cutting ratio according to each candidate cutting ratio; wherein the first coefficient is a coefficient of variance of clipping noise in the received signal;

determining a variance of a useful signal in the received signal at each of the candidate clipping ratios based on the variance of the first signal, the channel gain, and the clipping gain at each of the candidate clipping ratios;

determining a variance of clipping noise in the received signal at each of the candidate clipping ratios based on the variance of the first signal, the channel gain, and a first coefficient at each of the candidate clipping ratios;

and calculating the signal-to-noise ratio of the received signal at each candidate cutting ratio according to the variance of the first noise, the variance of the useful signal at each candidate cutting ratio and the variance of the clipping noise.

5. The method of claim 4, wherein said first coefficient based on said variance of said first signal, said channel gain, and each of said candidate wavelet ratios comprises:

determining clipping gain and a first coefficient under each candidate cutting ratio according to each candidate cutting ratio and a first function value; wherein the first function value represents a probability that a random variable obeying a standard normal distribution is greater than a clipping ratio.

6. The method of claim 4, wherein for a reference signal at a signal transmitting end, at least one of the following conditions is satisfied:

a non-negative real signal;

generated in the time domain and time-multiplexed with the transmit signal.

7. The method of claim 1, wherein the chopping ratio is any one of:

8. The method of claim 1, wherein the candidate clip ratio is indicated by at least one of:

introducing a row indication by a set of clip ratios and a clip ratio index;

the indication is made by a wavelet ratio quantization value.

9. The method of claim 1, wherein the channel quality information comprises at least one of:

10. An information measuring apparatus applied to a terminal, comprising:

a first determining module for determining a waveform of the received signal;

11. A terminal comprising a processor, a memory and a program or instruction stored on the memory and executable on the processor, which program or instruction when executed by the processor implements the steps of the information measuring method according to any of claims 1-9.

12. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the information measuring method according to any of claims 1-9.