CN114884786A - Signal processing method and device - Google Patents

Signal processing method and device Download PDF

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CN114884786A
CN114884786A CN202110163737.5A CN202110163737A CN114884786A CN 114884786 A CN114884786 A CN 114884786A CN 202110163737 A CN202110163737 A CN 202110163737A CN 114884786 A CN114884786 A CN 114884786A
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symbol
amplitude scaling
average power
scaling ratio
determining
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CN114884786B (en
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山珊
杨燕
李丹妮
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The application discloses a signal processing method and a signal processing device, which are used for carrying out amplitude scaling compensation on received symbols to solve the problems of receiving performance reduction and rate reduction of individual symbols caused by abnormal power. The signal processing method provided by the application comprises the following steps: determining the average power of the received symbol, and determining the amplitude scaling ratio of the symbol according to the average power of the symbol; and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.

Description

Signal processing method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a signal processing method and apparatus.
Background
Currently, both 4G and 5G adopt a multicarrier-based Orthogonal Frequency Division Multiplexing (OFDM) Modulation mode, and each carrier adopts 256 Quadrature Amplitude Modulation (QAM) to significantly improve throughput under the same time-Frequency resource condition, but a constellation diagram of 256QAM has higher requirements for undesirable factors such as Frequency offset, timing, scaling, noise, and the like.
Specifically, Quadrature Amplitude Modulation (QAM) and Orthogonal Frequency Division Multiplexing (OFDM) systems have high spectrum utilization, and are therefore widely used in 4G and 5G. A simple schematic is shown in fig. 1.
A binary bit (bit) stream input from a transmitting end passes through every L bitsQAM modulation forms serial QAM modulation symbols each
Figure BDA0002936646410000011
The QAM modulation symbol is divided into
Figure BDA0002936646410000012
Layers, then undergo serial-to-parallel (S/P) variation and OFDM modulation to form serial OFDM symbols. And the receiving end recovers the original bit through OFDM demodulation, parallel-serial change (P/S), layer de-mapping and QAM demodulation.
For 256QAM, the binary bit streams b (8i), b (8i +1), b (8i +2), b (8i +3), b (8i +4), b (8i +5), b (8i +6), b (8i +7) are transformed as follows:
Figure BDA0002936646410000013
generating serial QAM modulation symbols d (i) (after power normalization), if the minimum distance between signal points is 2A and all signal points appear with equal probability, the average transmitting power is:
Figure BDA0002936646410000014
where M is the modulation order, and for 256QAM modulation, M is 256. In figure 2, M is 256-M,
Figure BDA0002936646410000021
a constellation of one OFDM symbol of time.
Generally, for simplicity, a is 1, that is, the average power of one OFDM symbol is 1. The receiving end obtains all QAM demodulation symbols
Figure BDA0002936646410000022
And then, restoring the soft bits into demodulation soft bits, and further sending the demodulation soft bits into a decoder for decoding.
In summary, under normal conditions, the average power of each OFDM symbol in each layer is 1, and each constellation point is strictly in its respective interval. However, when some OFDM symbols are abnormal in power, the constellation map is correspondingly scaled, so that individual constellation points are judged in adjacent regions, and the soft bit analysis is wrong, thereby causing bit errors. If the originating symbol 1 is scaled down by a factor of 0.95, the Error Vector Magnitude (EVM) quality is reduced by 13dB relative to symbol 2. If the receiving end does not perform any processing, errors will be caused.
Disclosure of Invention
The embodiment of the application provides a signal processing method and a signal processing device, which are used for performing amplitude scaling compensation on received symbols to solve the problems of receiving performance reduction and rate reduction of individual symbols caused by abnormal power (larger or smaller).
The signal processing method provided by the embodiment of the application comprises the following steps:
determining the average power of the received symbol, and determining the amplitude scaling ratio of the symbol according to the average power of the symbol;
and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
By the method, the average power of the received symbol is determined, and the amplitude scaling ratio of the symbol is determined according to the average power of the symbol; and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol, so that the problems of receiving performance reduction and rate reduction of individual symbols caused by abnormal power (larger or smaller) are solved by carrying out amplitude scaling compensation on the received symbol.
Optionally, determining an amplitude scaling ratio of the symbol according to the average power of the symbol specifically includes:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
Optionally, determining whether amplitude scaling compensation needs to be performed on the symbol according to the amplitude scaling ratio of the symbol, specifically including:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
Optionally, the symbol is a symbol subjected to orthogonal frequency division multiplexing OFDM demodulation.
Optionally, for a symbol 1 of the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure BDA0002936646410000031
wherein the content of the first and second substances,
Figure BDA0002936646410000032
denotes the average power of the symbol 1, N 0 The number of resource elements RE selected for symbol 1,
Figure BDA0002936646410000033
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure BDA0002936646410000034
Figure BDA0002936646410000035
the number of layers representing a user is indicated,
Figure BDA0002936646410000036
k step representing the step size of the comb-selected RE.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000037
wherein the content of the first and second substances,
Figure BDA0002936646410000038
representing the amplitude scaling ratio of said symbol 1.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000039
wherein the content of the first and second substances,
Figure BDA00029366464100000310
representing the amplitude scaling ratio of said symbol 1,
Figure BDA00029366464100000311
mean power representing symbol 2:
Figure BDA0002936646410000041
wherein the content of the first and second substances,
Figure BDA0002936646410000042
indicating that part of the RE selected from symbol 2 is involved in the calculation.
Optionally, the preset range includes: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure BDA0002936646410000043
wherein the content of the first and second substances,
Figure BDA0002936646410000044
representing the sign 1 after amplitude scaling compensation.
An embodiment of the present application provides a signal processing apparatus, including:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
determining the average power of the received symbol, and determining the amplitude scaling ratio of the symbol according to the average power of the symbol;
and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
Optionally, determining an amplitude scaling ratio of the symbol according to the average power of the symbol specifically includes:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
Optionally, determining whether amplitude scaling compensation needs to be performed on the symbol according to the amplitude scaling ratio of the symbol, specifically including:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
Optionally, the symbol is a symbol subjected to orthogonal frequency division multiplexing OFDM demodulation.
Optionally, for symbol 1 of the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure BDA0002936646410000051
wherein the content of the first and second substances,
Figure BDA0002936646410000052
denotes the average power of the symbol 1, N 0 The number of resource elements RE selected for symbol 1,
Figure BDA0002936646410000053
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure BDA0002936646410000054
Figure BDA0002936646410000055
the number of layers representing a user is indicated,
Figure BDA0002936646410000056
k step representing the step size of the comb-selected RE.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000057
wherein the content of the first and second substances,
Figure BDA0002936646410000058
representing the amplitude scaling ratio of said symbol 1.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000059
wherein the content of the first and second substances,
Figure BDA00029366464100000510
representing the amplitude scaling ratio of said symbol 1,
Figure BDA00029366464100000511
mean power representing symbol 2:
Figure BDA00029366464100000512
wherein the content of the first and second substances,
Figure BDA00029366464100000513
indicating that part of the RE selected from symbol 2 is involved in the calculation.
Optionally, the preset range includes: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure BDA00029366464100000514
wherein the content of the first and second substances,
Figure BDA00029366464100000515
representing the sign 1 after amplitude scaling compensation.
Another signal processing apparatus provided in an embodiment of the present application includes:
a first unit, configured to determine an average power of a received symbol, and determine an amplitude scaling ratio of the symbol according to the average power of the symbol;
and the second unit is used for judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
Another embodiment of the present application provides a computing device, which includes a memory and a processor, wherein the memory is used for storing program instructions, and the processor is used for calling the program instructions stored in the memory and executing any one of the above methods according to the obtained program.
Another embodiment of the present application provides a computer-readable storage medium storing a computer program for causing a computer to perform any one of the methods described above.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a process of transmitting signals between a transmitting end and a receiving end;
FIG. 2 is a schematic diagram of a constellation of OFDM symbols;
fig. 3 is a schematic diagram of a complementary position of a receiving end for performing amplitude scaling compensation on a symbol according to an embodiment of the present application;
fig. 4 is a schematic diagram of a number of user layers according to an embodiment of the present application;
fig. 5 is a schematic flowchart of a signal processing method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a signal processing apparatus on a network side according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a signal processing apparatus at a terminal side according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of another signal processing apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the test process, it is found that a fixed slot (slot) error exists in a specific terminal at 256QAM (64 QAM does not exist at the same code rate), and the error is accompanied by a problem of an EVM difference of the first symbol (cb of the decoding error is also corresponding to the error in the first symbol).
By locating the direct cause of this problem, it was found that the energy of the first symbol is scaled relative to the energy of the other normal symbols, e.g., the normal symbol energy is 1 and the energy of the first symbol is 0.95. Therefore, the embodiments of the present application provide a signal processing method and apparatus, which mainly solve the problem that when the energy of the first symbol (not limited to the first symbol, but can be generalized to any symbol) is scaled, the receiver's corresponding scheme is used to improve the receiving performance.
The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a universal microwave Access (WiMAX) system, a 5G NR system, and the like. These various systems include terminal devices and network devices.
The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. The names of the terminal devices may also be different in different systems, for example, in a 5G system, the terminal devices may be referred to as User Equipments (UEs). Wireless terminal devices, which may be mobile terminal devices such as mobile telephones (or "cellular" telephones) and computers with mobile terminal devices, e.g., mobile devices that may be portable, pocket, hand-held, computer-included, or vehicle-mounted, communicate with one or more core networks via the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application.
The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells. A base station may also be referred to as an access point or as a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to interconvert received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may also be an evolved network device (eNB or e-NodeB) in a Long Term Evolution (LTE) system, a 5G base station in a 5G network architecture (next generation system), and may also be a home evolved node B (HeNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like, which are not limited in the embodiments of the present application.
Various embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the display sequence of the embodiment of the present application only represents the sequence of the embodiment, and does not represent the merits of the technical solutions provided by the embodiments.
The embodiment of the application is suitable for a signal receiving end, the receiving end may be a network side device or a terminal side device, and the embodiment of the application is not limited.
According to the embodiment of the application, the energy compensation is carried out on the symbol after the OFDM demodulation, so that the problems of the reduction of the receiving performance and the reduction of the speed rate of the individual symbol caused by abnormal power (larger or smaller) are solved.
In the embodiment of the present application, two schemes are specifically adopted to calculate the compensation factor:
the first scheme is as follows: reference is made to a standard constellation diagram;
scheme two is as follows: reference is made to the normal symbols.
The compensation position is shown in fig. 3, and actually the compensation position can be performed after the receiving end receives the data and before the QAM demodulation, and in consideration of the problems of the amount of computation and the complexity, the embodiment of the present application performs the compensation on the OFDM demodulated symbol
Figure BDA0002936646410000091
The process is carried out. I.e. assuming the input is user k UE After OFDM demodulation of the received signal
Figure BDA0002936646410000092
The layers are numbered for the user,
Figure BDA0002936646410000093
the number of layers representing a user is indicated,
Figure BDA0002936646410000094
represents the total Resource Element (RE) number of each layer in a time slot,
Figure BDA0002936646410000095
represents the number of REs contained in each OFDM symbol of each layer, eachThe time slot then has
Figure BDA0002936646410000096
One OFDM symbol.
The number of layers is the number of layers multiplexed in space division multiplexing, for example, for a single layer, 13 OFDM symbols have 3276 × 13 ═ 42588 QAM modulation symbols; for 2 layers, there are 42588 QAM modulation symbols for each 13 OFDM symbols, and 42588 x 2-85176 QAM modulation symbols for 2 layers in total. For example, fig. 4 is a three-dimensional graph with the abscissa of l, the ordinate of k, and the spatial coordinate of the number of layers n.
The following embodiments of the present application will be described with reference to the first symbol (i.e., symbol 1) as an example, but the actual operation is not limited to the first symbol, and other symbols are the same.
The first step is as follows: counting the power of the symbol average, counting each stream individually, and calculating an amplitude scaling ratio based thereon
Figure BDA0002936646410000101
Scheme 1: assuming that the number of resource units (REs) of the symbol 1 is large and extends over all constellation points, the ideal average power is close to 1 (standard constellation diagram), and the amplitude scaling ratio of the symbol 1 is estimated by calculating the ratio of the average power of the symbol 1 after OFDM demodulation at the receiving end to 1.0
Figure BDA0002936646410000102
Let the step length selected by comb be k step (i.e. taking a sample every few REs, just like a comb, k step Smaller combs, denser, k step Larger comb more sparse), N 0 The number of REs selected for symbol 1 (e.g.
Figure BDA0002936646410000103
k step 2, then k 1 ＝0,2,...,3274，N 0 ＝1638)。
In the context of figure 3, it is shown,
Figure BDA0002936646410000104
Figure BDA0002936646410000105
denotes the ith OFDM symbol of the nth layer (the nth symbol is a concept of time domain, i is an index of time domain; k is an index of frequency domain). Then, the average power of the ith OFDM symbol of the nth layer
Figure BDA0002936646410000106
And amplitude scaling ratio
Figure BDA0002936646410000107
Respectively as follows:
Figure BDA0002936646410000108
Figure BDA0002936646410000109
Figure BDA00029366464100001010
wherein the content of the first and second substances,
Figure BDA00029366464100001011
the mean power of the symbol 1, N, can also be expressed as an intermediate parameter 0 The number of resource elements RE selected for symbol 1,
Figure BDA00029366464100001012
indicating REs taken in the 1 st OFDM symbol of the nth layer.
It should be noted that the calculation of the embodiment of the present application
Figure BDA00029366464100001013
The part selecting value (k1) is used for calculation to reduce the computation amount, and all the REs (k) are used for adjustment in the next second adjustment step, so that k1 REs are selected from the k REs.
Figure BDA00029366464100001014
Indicating symbol 1 after OFDM demodulation,
Figure BDA00029366464100001015
indicating the number of REs contained in each OFDM symbol,
Figure BDA0002936646410000111
indicating that a part RE selected from symbol 1 participates in the calculation (in order to reduce the amount of calculation),
Figure BDA0002936646410000112
indicating the number of each layer of the user,
Figure BDA0002936646410000113
the number of layers representing a user is indicated,
Figure BDA0002936646410000114
k step representing the step size of the comb-selected RE.
Scheme 2: assuming that the number of REs of the symbol 1 is large and extends to all constellation points, the ideal average power is equivalent to the symbol 2, and the amplitude scaling ratio of the symbol 1 is estimated by calculating the ratio of the average power of the symbol 1 to the average power of the symbol 2 after OFDM demodulation at the receiving end
Figure BDA0002936646410000115
Let the step length selected by comb be k step ，N 0 The number of REs selected for symbol 1 (i.e., the first symbol) or symbol 2 (i.e., the second symbol). Then, the average power of the ith OFDM symbol of the nth layer
Figure BDA0002936646410000116
Average power of 2 nd OFDM symbol of n layer
Figure BDA0002936646410000117
And the amplitude scaling ratio of the ith OFDM symbol of the nth layer
Figure BDA0002936646410000118
Respectively as follows:
Figure BDA0002936646410000119
Figure BDA00029366464100001110
Figure BDA00029366464100001111
Figure BDA00029366464100001112
wherein the content of the first and second substances,
Figure BDA00029366464100001113
and
Figure BDA00029366464100001114
it can also be regarded as an intermediate parameter,
Figure BDA00029366464100001115
represents the RE taken in the ith OFDM symbol of the nth layer,
Figure BDA00029366464100001116
indicating the RE taken in the 2 nd OFDM symbol of the nth layer.
The second step: using the calculated amplitude scaling ratio
Figure BDA00029366464100001117
Making a decision if the amplitude scales the ratio
Figure BDA00029366464100001118
If the current time is within the preset range, the current time is judged to be in need of scaling compensation; otherwise, consider the calculated coefficientsThe ratio is normal fluctuation or fluctuation caused by too few statistical samples, and no correction is made.
For example, the preset range includes: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]The amount of the solvent, for example,
Figure BDA0002936646410000121
f step1 ＝0.02，f step2 0.95 is 0.1, then [ 0.9-0.98 ]]In between, corrections are required; while
Figure BDA0002936646410000122
No correction is used.
For example, the specific scaling compensation can be performed using the following formula:
Figure BDA0002936646410000123
wherein the content of the first and second substances,
Figure BDA0002936646410000124
representing the sign 1 after amplitude scaling compensation.
In summary, the embodiments of the present application are directed to performing corresponding energy scaling on an individual symbol after OFDM demodulation due to power anomaly (large or small). Scaling factor (i.e. the ratio of the sum of the coefficients of the two coefficients to the sum of the coefficients to be scaled to the sum of the coefficients to be scaled to the sum of the coefficients to be scaled to the sum to be scaled to the sum to be scaled to the sum to be scaled to the sum to be scaled to be
Figure BDA0002936646410000125
) The energy comparison with a standard constellation diagram (namely, the scheme 1) can be adopted, and the energy comparison with other normal symbol constellation diagrams (namely, the scheme 2) can also be adopted. Meanwhile, in order to prevent the coefficient calculation abnormality, only the sign of the specified range is compensated. By carrying out energy compensation on the OFDM demodulated symbols, the problems of reduced receiving performance and reduced rate of individual symbols caused by abnormal power (larger or smaller) are solved; meanwhile, compensation after OFDM demodulation also ensures lower complexity and computation amount. For example, symbol 1 length N4096 +352, 16 antenna reception, if symbol 1 of the received data is compensated, it is necessary to do soLine 16 x 4448 x 2 x 142336 multiplications. After OFDM demodulation, a maximum of 3276 × 2 to 6552 multiplications are required.
At a signal receiving end, referring to fig. 5, a signal processing method provided in an embodiment of the present application includes:
s101, determining the average power of a received symbol, and determining the amplitude scaling ratio of the symbol according to the average power of the symbol;
and S102, judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
Optionally, determining an amplitude scaling ratio of the symbol according to the average power of the symbol specifically includes:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
Optionally, determining whether amplitude scaling compensation needs to be performed on the symbol according to the amplitude scaling ratio of the symbol, specifically including:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
Optionally, the symbol is a symbol subjected to orthogonal frequency division multiplexing OFDM demodulation.
Optionally, for a symbol 1 of the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure BDA0002936646410000131
wherein the content of the first and second substances,
Figure BDA0002936646410000132
denotes the average power of the symbol 1, N 0 The number of resource elements RE selected for symbol 1,
Figure BDA0002936646410000133
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure BDA0002936646410000134
Figure BDA0002936646410000135
the number of layers representing a user is indicated,
Figure BDA0002936646410000136
k step representing the step size of the comb-selected RE.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000137
wherein the content of the first and second substances,
Figure BDA0002936646410000138
representing the amplitude scaling ratio of said symbol 1.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000139
wherein the content of the first and second substances,
Figure BDA00029366464100001310
representing the amplitude scaling ratio of said symbol 1,
Figure BDA00029366464100001311
mean power representing symbol 2:
Figure BDA00029366464100001312
wherein the content of the first and second substances,
Figure BDA00029366464100001313
indicating that part of the RE selected from symbol 2 is involved in the calculation.
Optionally, the preset range includes: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure BDA0002936646410000141
wherein the content of the first and second substances,
Figure BDA0002936646410000142
representing the sign 1 after amplitude scaling compensation.
The signal processing apparatus provided in the embodiment of the present application may be a network side device or a terminal side device.
Referring to fig. 6, when serving as a network-side device, a signal processing apparatus provided in an embodiment of the present application includes: the processor 500, which is used to read the program in the memory 520, executes the following processes:
determining an average power of a symbol received by transceiver 510 and determining an amplitude scaling ratio of the symbol based on the average power of the symbol;
and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
Optionally, determining an amplitude scaling ratio of the symbol according to the average power of the symbol specifically includes:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
Optionally, determining whether amplitude scaling compensation needs to be performed on the symbol according to the amplitude scaling ratio of the symbol, specifically including:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
Optionally, the symbol is a symbol subjected to orthogonal frequency division multiplexing OFDM demodulation.
Optionally, for a symbol 1 of the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure BDA0002936646410000143
wherein the content of the first and second substances,
Figure BDA0002936646410000144
denotes the average power, N, of the symbol 1 0 The number of resource elements RE selected for symbol 1,
Figure BDA0002936646410000151
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure BDA0002936646410000152
Figure BDA0002936646410000153
the number of layers representing a user is indicated,
Figure BDA0002936646410000154
k step representing the step size of the comb-selected RE.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000155
wherein the content of the first and second substances,
Figure BDA0002936646410000156
representing the amplitude scaling ratio of said symbol 1.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000157
wherein the content of the first and second substances,
Figure BDA0002936646410000158
representing the amplitude scaling ratio of said symbol 1,
Figure BDA0002936646410000159
mean power representing symbol 2:
Figure BDA00029366464100001510
wherein the content of the first and second substances,
Figure BDA00029366464100001511
indicating that part of the RE selected from symbol 2 is involved in the calculation.
Optionally, the preset range includes: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure BDA00029366464100001512
wherein, the first and the second end of the pipe are connected with each other,
Figure BDA00029366464100001513
representing the sign 1 after amplitude scaling compensation.
The processor 500 also has the function of executing other specific processing flows mentioned in the above method, which are not described herein again.
A transceiver 510 for receiving and transmitting data under the control of the processor 500.
Where in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 500 and memory represented by memory 520. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.
The processor 500 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).
Referring to fig. 7, when serving as a terminal-side device, the signal processing apparatus provided in the embodiment of the present application includes: the processor 600, which is used to read the program in the memory 620, executes the following processes:
determining an average power of a symbol received by transceiver 610 and determining an amplitude scaling ratio of the symbol based on the average power of the symbol;
and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
Optionally, determining an amplitude scaling ratio of the symbol according to the average power of the symbol specifically includes:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
Optionally, determining whether amplitude scaling compensation needs to be performed on the symbol according to the amplitude scaling ratio of the symbol, specifically including:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
Optionally, the symbol is a symbol subjected to orthogonal frequency division multiplexing OFDM demodulation.
Optionally, for a symbol 1 of the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure BDA0002936646410000171
wherein the content of the first and second substances,
Figure BDA0002936646410000172
denotes the average power of the symbol 1, N 0 The number of resource elements RE selected for symbol 1,
Figure BDA0002936646410000173
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure BDA0002936646410000174
Figure BDA0002936646410000175
the number of layers representing a user is indicated,
Figure BDA0002936646410000176
k step representing the step size of the comb-selected RE.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000177
wherein the content of the first and second substances,
Figure BDA0002936646410000178
representing the amplitude scaling ratio of said symbol 1.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000179
wherein the content of the first and second substances,
Figure BDA00029366464100001710
representing the amplitude scaling ratio of said symbol 1,
Figure BDA00029366464100001711
mean power representing symbol 2:
Figure BDA00029366464100001712
wherein the content of the first and second substances,
Figure BDA00029366464100001713
indicating that part of the RE selected from symbol 2 is involved in the calculation.
Optionally, the preset range includes: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure BDA00029366464100001714
wherein the content of the first and second substances,
Figure BDA00029366464100001715
representing the sign 1 after amplitude scaling compensation.
The processor 600 also has the function of executing other specific processing flows mentioned in the above methods, which are not described herein again.
A transceiver 610 for receiving and transmitting data under the control of the processor 600.
Where in fig. 7 the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 630 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.
Alternatively, the processor 600 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).
The signal processing apparatus provided in the embodiment of the present application may perform each of the processes described in the foregoing method, and details are not described here.
Referring to fig. 8, another signal processing apparatus provided in an embodiment of the present application includes:
a first unit 81, configured to determine an average power of a received symbol, and determine an amplitude scaling ratio of the symbol according to the average power of the symbol;
a second unit 82, configured to determine whether amplitude scaling compensation needs to be performed on the symbol according to the amplitude scaling ratio of the symbol.
Optionally, determining an amplitude scaling ratio of the symbol according to the average power of the symbol specifically includes:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
Optionally, determining whether amplitude scaling compensation needs to be performed on the symbol according to the amplitude scaling ratio of the symbol, specifically including:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
Optionally, the symbol is a symbol subjected to orthogonal frequency division multiplexing OFDM demodulation.
Optionally, for a symbol 1 of the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure BDA0002936646410000191
wherein the content of the first and second substances,
Figure BDA0002936646410000192
denotes the average power of the symbol 1, N 0 The number of resource elements RE selected for symbol 1,
Figure BDA0002936646410000193
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure BDA0002936646410000194
Figure BDA0002936646410000195
the number of layers representing a user is indicated,
Figure BDA0002936646410000196
k step representing the step size of the comb-selected RE.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000197
wherein the content of the first and second substances,
Figure BDA0002936646410000198
representing the amplitude scaling ratio of said symbol 1.
Optionally, according to the average power of the symbol 1, the amplitude scaling ratio of the symbol 1 is determined by specifically using the following formula:
Figure BDA0002936646410000199
wherein the content of the first and second substances,
Figure BDA00029366464100001910
representing the amplitude scaling ratio of said symbol 1,
Figure BDA00029366464100001911
mean power representing symbol 2:
Figure BDA00029366464100001912
wherein the content of the first and second substances,
Figure BDA00029366464100001913
indicating that part of the RE selected from symbol 2 is involved in the calculation.
Optionally, the pre-treatingThe setting range comprises: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure BDA0002936646410000201
wherein the content of the first and second substances,
Figure BDA0002936646410000202
representing the sign 1 after amplitude scaling compensation.
Specifically, how to determine the average power of the received symbol specifically by the first unit 81 and determine the amplitude scaling ratio of the symbol according to the average power of the symbol may adopt the corresponding processing procedure mentioned in the above method, and similarly, how to determine whether amplitude scaling compensation needs to be performed on the symbol specifically by the second unit 82 according to the amplitude scaling ratio of the symbol may adopt the corresponding processing procedure mentioned in the above method, which is not described herein again.
It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiment of the present application provides a computing device, which may specifically be a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), and the like. The computing device may include a Central Processing Unit (CPU), memory, input/output devices, etc., the input devices may include a keyboard, mouse, touch screen, etc., and the output devices may include a Display device, such as a Liquid Crystal Display (LCD), a Cathode Ray Tube (CRT), etc.
The memory may include Read Only Memory (ROM) and Random Access Memory (RAM), and provides the processor with program instructions and data stored in the memory. In the embodiments of the present application, the memory may be used for storing a program of any one of the methods provided by the embodiments of the present application.
The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained program instructions by calling the program instructions stored in the memory.
Embodiments of the present application provide a computer-readable storage medium for storing a computer program for an apparatus provided in the embodiments of the present application, which includes a computer program for executing any one of the methods provided in the embodiments of the present application.
The computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
The method provided by the embodiment of the application can be applied to terminal equipment and also can be applied to network equipment.
The Terminal device may also be referred to as a User Equipment (User Equipment, abbreviated as "UE"), a Mobile Station (Mobile Station, abbreviated as "MS"), a Mobile Terminal (Mobile Terminal), or the like, and optionally, the Terminal may have a capability of communicating with one or more core networks through a Radio Access Network (RAN), for example, the Terminal may be a Mobile phone (or referred to as a "cellular" phone), a computer with Mobile property, or the like, and for example, the Terminal may also be a portable, pocket, hand-held, computer-built-in, or vehicle-mounted Mobile device.
A network device may be a base station (e.g., access point) that refers to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (NodeB or eNB or e-NodeB) in LTE, or a gNB in 5G system. The embodiments of the present application are not limited.
The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may 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, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (18)

1. A method of signal processing, the method comprising:
determining the average power of the received symbol, and determining the amplitude scaling ratio of the symbol according to the average power of the symbol;
and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
2. The method of claim 1, wherein determining the amplitude scaling ratio of the symbol based on the average power of the symbol comprises:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
3. The method of claim 1, wherein determining whether amplitude scaling compensation is required for the symbol according to the amplitude scaling ratio of the symbol comprises:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
4. The method of claim 1, wherein the symbol is an orthogonal frequency division multiplexing, OFDM, demodulated symbol.
5. The method of claim 4, wherein for symbol 1 in the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure FDA0002936646400000011
wherein the content of the first and second substances,
Figure FDA0002936646400000012
denotes the average power of the symbol 1, N 0 The number of resource elements RE selected for symbol 1,
Figure FDA0002936646400000013
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure FDA0002936646400000014
Figure FDA0002936646400000015
the number of layers representing a user is indicated,
Figure FDA0002936646400000016
k step representing the step size of the comb-selected RE.
6. The method of claim 5, wherein the amplitude scaling ratio of symbol 1 is determined according to the average power of symbol 1 by using the following formula:
Figure FDA0002936646400000021
wherein, the first and the second end of the pipe are connected with each other,
Figure FDA0002936646400000022
representing the amplitude scaling ratio of said symbol 1.
7. The method of claim 5, wherein the amplitude scaling ratio of symbol 1 is determined according to the average power of symbol 1 by using the following formula:
Figure FDA0002936646400000023
wherein the content of the first and second substances,
Figure FDA0002936646400000024
representing the amplitude scaling ratio of said symbol 1,
Figure FDA0002936646400000025
mean power representing symbol 2:
Figure FDA0002936646400000026
wherein the content of the first and second substances,
Figure FDA0002936646400000027
indicating that part of the RE selected from symbol 2 is involved in the calculation.
8. The method of claim 6 or 7, wherein the preset range comprises: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure FDA0002936646400000028
Figure FDA0002936646400000029
wherein the content of the first and second substances,
Figure FDA00029366464000000210
representing the sign 1 after amplitude scaling compensation.
9. A signal processing apparatus, characterized by comprising:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
determining the average power of the received symbol, and determining the amplitude scaling ratio of the symbol according to the average power of the symbol;
and judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
10. The apparatus of claim 9, wherein determining the amplitude scaling ratio of the symbol based on the average power of the symbol comprises:
determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to 1.0;
or, determining the amplitude scaling ratio of the symbol according to the ratio of the average power of the symbol to the average power of other symbols.
11. The apparatus of claim 9, wherein determining whether amplitude scaling compensation is required for the symbol according to the amplitude scaling ratio of the symbol comprises:
and when the amplitude scaling ratio of the symbol is within a preset range, determining that amplitude scaling compensation needs to be carried out on the symbol.
12. The apparatus of claim 9, wherein the symbol is an Orthogonal Frequency Division Multiplexing (OFDM) demodulated symbol.
13. The apparatus of claim 12, wherein for symbol 1 in the received symbols, the average power of the symbol 1 is determined by the following formula:
Figure FDA0002936646400000031
wherein the content of the first and second substances,
Figure FDA0002936646400000032
denotes the average power of the symbol 1, N 0 The number of resource elements RE selected for symbol 1,
Figure FDA0002936646400000033
indicating that part of RE is selected from the symbol 1 to participate in the calculation, n indicates the number of each layer of the user,
Figure FDA0002936646400000034
Figure FDA0002936646400000035
the number of layers representing a user is indicated,
Figure FDA0002936646400000036
k step representing the step size of comb selection RE.
14. The apparatus of claim 13, wherein the amplitude scaling ratio for symbol 1 is determined according to the average power of symbol 1 by using the following formula:
Figure FDA0002936646400000037
wherein the content of the first and second substances,
Figure FDA0002936646400000038
representing the amplitude scaling ratio of said symbol 1.
15. The apparatus of claim 13, wherein the amplitude scaling ratio for symbol 1 is determined according to the average power of symbol 1 by using the following formula:
Figure FDA0002936646400000039
wherein the content of the first and second substances,
Figure FDA00029366464000000310
representing the amplitude scaling ratio of said symbol 1,
Figure FDA00029366464000000311
mean power representing symbol 2:
Figure FDA0002936646400000041
wherein, the first and the second end of the pipe are connected with each other,
Figure FDA0002936646400000042
indicating that part of the RE selected from symbol 2 is involved in the calculation.
16. The apparatus of claim 14 or 15, wherein the preset range comprises: [1-f ] step2 ,1-f step1 ]Or [1+ f step1 ,1+f step2 ]；
Determining whether amplitude scaling compensation is required for the symbol 1 by the following formula:
Figure FDA0002936646400000043
Figure FDA0002936646400000044
wherein the content of the first and second substances,
Figure FDA0002936646400000045
representing the sign 1 after amplitude scaling compensation.
17. A signal processing apparatus, characterized by comprising:
a first unit, configured to determine an average power of a received symbol, and determine an amplitude scaling ratio of the symbol according to the average power of the symbol;
and the second unit is used for judging whether amplitude scaling compensation needs to be carried out on the symbol or not according to the amplitude scaling ratio of the symbol.
18. A computer-readable storage medium, characterized in that it stores a computer program for causing a computer to perform the method of any one of claims 1 to 8.
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