WO2017005161A1

WO2017005161A1 - Power allocation method and device

Info

Publication number: WO2017005161A1
Application number: PCT/CN2016/088515
Authority: WO
Inventors: 梅林�; 孙文彬; 沙学军
Original assignee: 华为技术有限公司
Priority date: 2015-07-06
Filing date: 2016-07-05
Publication date: 2017-01-12
Also published as: CN106332260A

Abstract

Provided in embodiments of the present invention are a power allocation method and device, the method comprising: determining a first power allocation value of each subcarrier in a single-carrier frequency domain equalization (SC-FDE) system and a second power allocation value of each subcarrier in an orthogonal frequency division multiplexing (OFDM) system according to a fading value of each of the subcarriers; determining a first weight value of the SC-FDE system and a second weight value of the OFDM system according to predetermined parameters; and determining a third power allocation value of each subcarrier in a hybrid carrier system according to the first power allocation value, the second power allocation value, the first weight value and the second weight value, and allocating power for input signals on each of the subcarriers in the hybrid carrier system according to the third power allocation value. The power allocation method and device provided in the embodiments of the present invention can improve communication performance of the system.

Description

Power distribution method and device

Technical field

Embodiments of the present invention relate to communication technologies, and in particular, to a power allocation method and apparatus.

Background technique

The capacity of the communication system is related to the signal-to-noise power ratio. In the selective fading channel, since each sub-channel experiences different fading, how to allocate the appropriate sub-channel power so that the capacity of the channel reaches or approaches the maximum value. It has become a very important issue.

In the prior art, in the Long Term Evolution (LTE) system, the uplink uses Single-Carrier Frequency-Division Multiple Access (SC-FDMA) technology, and the downlink is used. The Orthogonal Frequency Division Multiplexing Access (OFDMA) technology is adopted for the link, and is based on the single-carrier frequency domain equalization (SC-FDE) system. Lagrangian's optimization method performs power allocation, while for Orthogonal Frequency Division Multiplexing (OFDM) systems, iterative water injection algorithm is used for power allocation.

However, after unifying the OFDM and SC-FDE systems to form a hybrid carrier system, how to allocate power to the hybrid carrier system is an urgent problem to be solved.

Summary of the invention

Embodiments of the present invention provide a power allocation method and apparatus, which are capable of performing power allocation for a hybrid carrier system, thereby improving communication performance of the system.

In a first aspect, an embodiment of the present invention provides a power allocation method, including:

Determining, according to a fading value of each subcarrier, a first power allocation value of each subcarrier in a single carrier frequency domain equalization SC-FDE system and a second power allocation value of each subcarrier in an orthogonal frequency division multiplexing OFDM system;

Determining a first weight value of the SC-FDE system and the OFDM system according to a preset parameter a second weight value; the first weight value is used to represent a proportion of the first power allocation value in the hybrid carrier system, and the second weight value is used to represent the second power allocation value a proportion of the hybrid carrier system that is a system of the SC-FDE system and the OFDM system;

Determining, according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value, a third power allocation value of each subcarrier in the hybrid carrier system, and according to the The three power allocation values are power allocated to input signals on respective subcarriers in the hybrid carrier system.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first power allocation value, the second power allocation value, and the first weight value and the second weight The value determines a third power allocation value of each subcarrier in the hybrid carrier system, including:

And performing, according to the first weight value and the second weight value, linearly weighting the first power allocation value and the second power allocation value to obtain the third power allocation value.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the determining, by the fading value of each subcarrier, determining a single carrier frequency domain equalization SC-FDE The first power allocation value of each subcarrier in the system includes:

Establishing an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel;

The maximum value of the channel capacity is obtained by an optimization algorithm, and the maximum value of the channel capacity is used as the first power allocation value.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the determining the single carrier frequency domain equalization SC-FDE according to the fading value of each subcarrier The first power allocation value of each subcarrier in the system includes:

According to the formula

Determining a first power allocation value p _sc,i of the i-th subcarrier in the SC-FDE system;

Where N represents the length of the discrete Fourier transform DFT; h _i represents the fading value of the i-th frequency point on the channel.

Combining the first aspect, the first one of the first aspect to the second one of the first aspect In a fourth possible implementation manner of the first aspect, the determining, according to the fading value of each subcarrier, the second power allocation value of each subcarrier in the OFDM system, including:

The maximum value of the channel capacity is obtained by an optimization algorithm, and the maximum value of the channel capacity is used as the second power allocation value.

With reference to the first aspect, the first aspect of the first aspect to the second possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the fading according to each subcarrier And determining a second power allocation value of each subcarrier in the orthogonal frequency division multiplexing OFDM system, including:

According to the formula

Determining a second power allocation value p _ofdm,i of the i-th subcarrier in the OFDM system;

among them,

γ represents the signal-to-noise ratio, E _b represents the energy per bit signal, and N ₀ represents the noise power spectral density.

With reference to the first aspect, the first aspect of the first aspect, the fifth possible implementation manner of the fifth aspect, in the sixth possible implementation manner of the first aspect, Allocating values for power allocation of input signals on each subcarrier in the hybrid carrier system, including:

Performing serial/parallel conversion and -α+1 order weighted fractional Fourier transform WFRFT transform on the input signal to obtain a first frequency domain signal;

And performing power allocation on the first frequency domain signal on each subcarrier according to the third power allocation value.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, after performing power allocation on the first frequency domain signal according to the third power allocation value ,Also includes:

Performing an N-point discrete Fourier transform IDFT, parallel/serial conversion, and adding cyclic prefix processing on the first frequency domain signal in sequence to obtain a processed signal;

The processed signal is subjected to digital-to-analog conversion to obtain a converted signal, and the converted signal is transmitted to a receiving side device.

With reference to the seventh possible implementation of the first aspect, in the eighth possible implementation manner of the first aspect, after the sending the the signal to the receiving device, the method further includes:

Performing analog-to-digital conversion on the converted signal, removing the cyclic prefix, serial/parallel conversion, and N-point DFT transform to obtain a second frequency domain signal;

Performing frequency domain zero-forcing equalization ZF processing on the second frequency domain signal according to the equalization matrix to obtain an equalized signal;

The equalized signal is extracted by power, and the equalized signal after the extracted power is subjected to WFRFT processing of α-1 order to obtain the input signal.

With reference to the first aspect, the first aspect of the first aspect, the eighth possible implementation manner of the first aspect, the ninth possible implementation manner of the first aspect,

And transmitting, to the receiving device, indication information, where the indication information is used to indicate whether to use the third power allocation value to perform power allocation on an input signal on each subcarrier in the hybrid carrier system.

In a second aspect, an embodiment of the present invention provides a power distribution apparatus, including:

a determining module, configured to determine, according to a fading value of each subcarrier, a first power allocation value of each subcarrier in a single carrier frequency domain equalization SC-FDE system and a second power of each subcarrier in an orthogonal frequency division multiplexing OFDM system Assignment value

The determining module is further configured to determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to a preset parameter; the first weight value is used to indicate the first power allocation a proportion of the value in the hybrid carrier system, the second weight value is used to indicate a proportion of the second power allocation value in the hybrid carrier system, and the hybrid carrier system is the SC a system comprising a FDE system and said OFDM system;

The determining module is further configured to determine, according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value, a third power of each subcarrier in the hybrid carrier system. Assignment value

An allocating module, configured to perform, according to the third power allocation value, each of the hybrid carrier systems The input signal on the subcarrier is used for power distribution.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining module is configured to allocate a value to the first power according to the first weight value and the second weight value And linearly weighting the second power allocation value to obtain the third power allocation value.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the determining module is specifically configured to:

With reference to the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the determining module is specifically configured to:

According to the formula

With reference to the second aspect, the first one of the second aspect, the third possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect, the determining module is specifically used to :

With reference to the second aspect, the first one of the second aspect, the third possible implementation manner of the second aspect, in the fifth possible implementation manner of the second aspect, the determining module is specifically used According to the formula

among them,

With reference to the second aspect, the first one of the second aspect, the fifth possible implementation manner of the second aspect, in the sixth possible implementation manner of the second aspect,

a converting unit, configured to perform serial/parallel conversion and -α+1 order weighted fractional Fourier transform WFRFT transform on the input signal to obtain a first frequency domain signal;

And an allocating unit, configured to perform power allocation on the first frequency domain signal on each subcarrier according to the third power allocation value.

In conjunction with the sixth possible implementation of the second aspect, in a seventh possible implementation of the second aspect, the device further includes:

a processing module, configured to sequentially perform N-point discrete Fourier transform IDFT, parallel/serial conversion, and add cyclic prefix processing on the first frequency domain signal to obtain a processing signal;

a conversion module, configured to perform digital/analog conversion on the processed signal to obtain a converted signal;

And a sending module, configured to send the conversion signal to the receiving side device.

With reference to the seventh possible implementation of the second aspect, in an eighth possible implementation manner of the second aspect, the converting module is further configured to perform analog/digital conversion on the converted signal, and remove the Cyclic prefix, serial/parallel conversion, and N-point DFT transform to obtain a second frequency domain signal;

The processing module is further configured to perform frequency domain zero-forcing equalization ZF processing on the second frequency domain signal according to the equalization matrix to obtain an equalized signal;

The processing module is further configured to perform power extraction on the equalized signal, and perform WFRFT processing of α-1 order on the equalized signal after extracting power to obtain the input signal.

With reference to the second aspect, the first one of the second aspect, the eighth possible implementation manner of the second aspect, in the ninth possible implementation manner of the second aspect, And the method is further configured to send indication information to the receiving side device, where the indication information is used to indicate whether to use the third power allocation value to perform power allocation on an input signal on each subcarrier in the hybrid carrier system.

The power allocation method and apparatus provided by the embodiments of the present invention determine the first power allocation value and the orthogonal frequency division multiplexing OFDM of each subcarrier in the single carrier frequency domain equalized SC-FDE system according to the fading value of each subcarrier. a second power allocation value of each subcarrier in the system, and determining a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter, according to the first power allocation value, the second power allocation value, and the A weight value and a second weight value determine a third power allocation value of each subcarrier in the hybrid carrier system, and perform power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value. Since the power allocation modes of the SC-FDE system and the OFDM system are comprehensively considered, the power distribution of the hybrid carrier system is performed, thereby improving the communication performance of the system.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

FIG. 1 is a schematic flowchart diagram of Embodiment 1 of a power distribution method according to the present invention;

2 is a schematic flowchart of Embodiment 2 of a power distribution method according to the present invention;

3 is a schematic flowchart of Embodiment 3 of a power distribution method according to the present invention;

4 is a schematic flowchart of Embodiment 4 of a power distribution method according to the present invention;

FIG. 5 is a schematic flowchart of Embodiment 5 of a power allocation method according to the present invention;

6 is a signaling diagram of Embodiment 6 of a power allocation method according to the present invention;

FIG. 7 is a schematic structural diagram of Embodiment 1 of a power distribution device according to the present invention; FIG.

8 is a schematic structural diagram of Embodiment 2 of a power distribution device according to the present invention;

9 is a schematic structural diagram of Embodiment 3 of a power distribution device according to the present invention;

10 is a schematic structural diagram of Embodiment 4 of a power distribution device according to the present invention;

11 is a schematic structural diagram of Embodiment 5 of a power distribution device according to the present invention;

12 is a schematic structural diagram of Embodiment 1 of a transmitting device according to the present invention;

FIG. 13 is a schematic structural diagram of Embodiment 1 of a receiving device according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention is applicable to a hybrid carrier system, and is specifically applicable to a scenario in which a weighted-type fractional Fourier transform (WFRFT) signal is used for power allocation in a hybrid carrier system, and the hybrid carrier system utilizes The WFRFT approach unifies the OFDMA system and the SC-FDE system.

The following is a brief introduction to the definition of WFRFT, which can be defined as:

S ₀ =w ₀ (α,V)X ₀ +w ₁ (α,V)X ₁ +w ₂ (α,V)X ₂ +w ₃ (α,V)X ₃ =W _α X ₀ (1)

In the formula (1), α is the order WFRFT transform, X ₀ is an arbitrary complex _{_{sequence, {X 0, X 1,}} X 2, X 3} are X 0 ~ 3 times normalized dispersion ₀ fourier Leaf transformation, as will be understood by those skilled in the art, the definition of the normalized discrete Fourier transform is:

Where j denotes an imaginary unit, n denotes the sequence number of each element in the X ₁ sequence, N denotes the length of the discrete Fourier transform DFT, k denotes the sequence number of each element in the X ₀ sequence, w ₀ , w ₁ in the formula (1), w ₂ and w ₃ are weighting coefficients, respectively, which can be calculated according to formula (2):

For example, m _k and n _k are preset parameters, and the values may be set according to experience or actual conditions. The specific values of m _k and n _k are not limited in this embodiment.

Further, in the formula (2), let MV = [m ₀ , m ₁ , m ₂ , m ₃ ], NV = [n ₀ , n ₁ , n ₂ , n ₃ ], V = [MV, NV] When V=0, the parameter defined by formula (1)(2) is single parameter WFRFT, and when V≠0, it is called multi-parameter WFRFT. The single-parameter WFRFT is controlled by the parameter α and has the same cycle characteristic as the Fourier transform, usually α takes a real number in the interval [-2, 2] or [0, 4], and this interval is called α. Main (full) cycle.

X ₀ can be calculated by applying WFRFT with order [-α, V] for S ₀ (n), which is calculated as:

X ₀ =w ₀ (-α,V)S ₀ +w ₁ (-α,V)S ₁ +w ₂ (-α,V)S ₂ +w ₃ (-α,V)S ₃ =W _-a S ₀ (3)

The following is a method for realizing the power allocation by using the WFRFT to unify the OFDMA system and the SC-FDE system, and the WFRFT conversion of the signal and the power extraction of the signal after the power distribution of the transmitting end, and then performing WFRFT on the signal. The process of inverse transformation is described in detail.

1 is a schematic flowchart of a power distribution method according to Embodiment 1 of the present invention. The embodiment of the present invention provides a power allocation method, which may be performed by any device that performs a power allocation method, and the device may be implemented by software and/or Or hardware implementation. In this embodiment, the device may be integrated in the transmitting side device or the receiving side device. As shown in FIG. 1, the method in this embodiment may include:

Step 101: Determine, according to a fading value of each subcarrier, a first power allocation value of each subcarrier in the SC-FDE system and a second power allocation value of each subcarrier in the OFDM system.

In this embodiment, in order to perform power allocation on the signal in the frequency domain, an existing channel estimation algorithm may be used to estimate the fading value of each center frequency point on each subcarrier, and according to each calculated central frequency. The fading value of the point respectively calculates a first power allocation value of each subcarrier in the SC-FDE system and a second power allocation value of each subcarrier in the OFDM system.

Step 102: Determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter; the first weight value is used to indicate a proportion of the first power allocation value in the hybrid carrier system, and second The weight value is used to represent the proportion of the second power allocation value in the hybrid carrier system, which is a system composed of an SC-FDE system and an OFDM system.

In the present embodiment, the hybrid carrier system is a system obtained by transforming the SC-FDE system and the OFDM system according to the WFRFT transform. Wherein, according to the preset parameters m _k and n _k and the formula (2), the weighting coefficients w ₀ , w ₁ , w ₂ and w _{3 are} calculated, and according to the formula (4) and the formula (5), the SC can be determined. The first weight value g _{1 of the} -FDE system and the second weight value g _{2 of the} OFDM system:

g ₁ =(|w ₀ | ² +|w ₂ | ² ) (4)

g ₂ =(|w ₁ | ² +|w ₃ | ² ) (5)

The first weight value represents the proportion of the first power allocation value in the hybrid carrier system, and the second weight value represents the proportion of the second power allocation value in the hybrid carrier system.

Step 103: Determine, according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value, a third power allocation value of each subcarrier in the hybrid carrier system, and mix the carrier according to the third power allocation value. The input signals on each subcarrier in the system are allocated power.

In this embodiment, the first power allocation value of each subcarrier in the SC-FDE system and the second power allocation value of each subcarrier in the OFDM system are determined, and the first weight value of the SC-FDE system and the OFDM are calculated. After the second weight value of the system, the third power allocation value of each subcarrier in the hybrid carrier system may be determined, and the input signal of each subcarrier is used for power allocation by using the third power allocation value, wherein the input signal may be Is an arbitrary complex sequence signal.

The power allocation method provided by the embodiment of the present invention determines the first power allocation value of each subcarrier in the single carrier frequency domain equalization SC-FDE system and the orthogonal frequency division multiplexing OFDM system according to the fading value of each subcarrier. a second power allocation value of each subcarrier, and determining a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter, according to the first power allocation value, the second power allocation value, and the first weight The value and the second weight value determine a third power allocation value of each subcarrier in the hybrid carrier system, and perform power allocation on the input signal on each subcarrier in the hybrid carrier system according to the third power allocation value. Since the power allocation modes of the SC-FDE system and the OFDM system are comprehensively considered, the power distribution of the hybrid carrier system is performed, thereby improving the communication performance of the system.

The technical solution of the first embodiment of the power distribution method will be described in detail below by using several specific embodiments.

FIG. 2 is a schematic flowchart diagram of Embodiment 2 of a power distribution method according to the present invention. In this embodiment, based on the first embodiment of the power allocation method, an embodiment for determining a third allocated power value for the transmitting device is described in detail. As shown in FIG. 2, the method in this embodiment may include:

Step 201, according to the formula

Determining a first power allocation value p _sc,i of the i-th subcarrier in the SC-FDE system.

Step 202, according to the formula

Determining a second power allocation value p _ofdm,i of the ith subcarrier in the OFDM system.

In this embodiment _, after the second power allocation value p _{ofdm, i} , of all subcarriers is calculated according to the above steps, the power on each subcarrier needs to be greater than zero. In a specific implementation process, after calculating the power to be allocated on each subcarrier in the OFDM system, it is determined whether the determined power has a negative value, and if there is a negative value, the power value of the subcarrier is set to 0. That is, the data of the subcarrier will not be transmitted any more, and if there is no negative value, the allocated power is recorded. It should be noted that after determining the subcarrier with the power value assigned to 0 in the OFDM system, the power value of the subcarrier is also set to 0 in the SC-FDE system. For example, if it is calculated according to step 202 that the second power allocation value of the second subcarrier is a negative value, the second power allocation value of the second subcarrier in the OFDM system is set to 0, in the SC-FDE system. When calculating the first power allocation value of each subcarrier, the first power allocation value of the second subcarrier is not calculated, and is directly set to 0, thereby ensuring the SC-FDE system and the OFDM system. The carrier is the same.

Step 203: Determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter.

Step 203 is similar to step 102, and details are not described herein again.

Step 204: Perform linear weighting on the first power allocation value and the second power allocation value according to the first weight value and the second weight value to obtain a third power allocation value.

In this embodiment, after the first weight value and the second weight value are calculated, the first power allocation value of each subcarrier in the SC-FDE system and the second power allocation value of each subcarrier in the OFDM system are performed. Linear weighting. In practical applications, the third power allocation value p _wfrft,i of the i-th sub-carrier in the hybrid carrier system can be calculated according to formula (6):

p _wfrft,i =g ₁ p _sc,i +g ₂ p _ofdm,i (6)

It should be noted that after the third-power allocation value of each sub-carrier in the hybrid carrier system is calculated, the transmitting-side device needs to send the third power allocation value to the receiving-side device, so that the two parties allocate according to the same third power. The value is processed by the signal.

Step 205: Perform serial/parallel conversion of the input signal and weighted fractional Fourier transform WFRFT transform of -α+1 order to obtain a first frequency domain signal.

In this embodiment, it is assumed that the input signal is a baseband mapping signal X=(x ₁ , x ₂ , . . . , x _N ) ^T of length N, and the input signal is subjected to serial/parallel conversion to obtain an M-channel conversion. As a result, the input signal is converted into parallel processing, and the obtained conversion result of the M path is respectively subjected to WFRFT conversion of -α+1 order of N points to obtain a first frequency domain signal. Among them, the definition of WFRFT transformation is as shown in formula (1).

It should be noted that the WFRFT domain of the α-order refers to the domain to which the input signal is transformed by the α-order WFRFT. The fractional domain and the time domain and the frequency domain of the α-order are not isolated, and any signal exists in the time domain and the frequency domain. And the WFRFT domain of the α-order has three forms, so it is assumed that the original signal is in the WFRFT domain of the α-order, and the signal is transformed to the frequency domain D=(d ₁ , d ₂ ,...,d by WFRFT of -α+1 order _N ) ^T can be expressed as: D=W _-α+1 X, where W is a weighting matrix.

Step 206: Perform power allocation on the first frequency domain signal according to the third power allocation value.

In this embodiment, the transmitting device performs power on the first frequency domain signal D after performing WFRFT conversion of -α+1 order of N points according to the third power allocation value of each subcarrier in the determined hybrid carrier system. distribution.

Step 207: Perform N-point discrete Fourier transform (IDFT), parallel/serial conversion, and add cyclic prefix processing on the first frequency domain signal in sequence to obtain a processed signal.

In this embodiment, after power allocation is performed on the first frequency domain signal D, the first frequency domain signal D is transformed into a time domain by an inverse discrete Fourier transform (IDFT) of an N point. The signal S=(s ₁ , s ₂ , . . . , s _N ) ^T , and then perform parallel/serial conversion on the time domain signal S. After obtaining one converted signal, in order to suppress interference between symbols, it is necessary to obtain the obtained way. The conversion signal adds a cyclic prefix. In a specific implementation process, a cyclic prefix of length L _cp may be added to the converted signal, and the duration of the cyclic prefix is greater than the maximum channel delay spread, wherein the sampling interval is assumed to be T _c . Then the duration of the cyclic prefix is T _cp = L _cp T _c .

Step 208: Perform digital/analog conversion on the processed signal to obtain a converted signal, and send the converted signal to the receiving side device.

In this embodiment, the processed signal after adding the cyclic prefix is subjected to digital-to-analog conversion to obtain a converted signal, and the obtained converted signal is transmitted through a frequency selective fading channel for transmission to the receiving side device.

A power allocation method provided by an embodiment of the present invention, where a transmitting side device passes each subcarrier according to each The fading value determines the first power allocation value of each subcarrier in the single carrier frequency domain equalization SC-FDE system and the second power allocation value of each subcarrier in the orthogonal frequency division multiplexing OFDM system, respectively, according to preset parameters Determining a first weight value of the SC-FDE system and a second weight value of the OFDM system, and determining, according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value, each subcarrier in the hybrid carrier system And a third power allocation value, and performing power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value. Since the power allocation modes of the SC-FDE system and the OFDM system are comprehensively considered, the power distribution of the hybrid carrier system is performed, thereby improving the communication performance of the system. In addition, the third power value is calculated by linearly weighting the first power value and the second power value, thereby reducing the error rate of the system.

FIG. 3 is a schematic flowchart diagram of Embodiment 3 of a power distribution method according to the present invention. In this embodiment, based on the first embodiment of the power allocation method, an embodiment for determining a third allocated power value for the transmitting device is described in detail. As shown in FIG. 3, the method in this embodiment may include:

Step 301: Establish an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel.

Step 302: Obtain a maximum value of the channel capacity by using an optimization algorithm, and use a maximum value of the channel capacity as the first power allocation value.

Step 303: Establish an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel.

Step 304: Obtain a maximum value of the channel capacity by using an optimization algorithm, and use a maximum value of the channel capacity as the second power allocation value.

Specifically, those skilled in the art can understand that for the SC-FDE system, the channel equalization algorithm may include a zero-forcing equalization algorithm, a minimum mean square error algorithm, etc., for different equalization algorithms, according to the fading value of the channel, to maximize The channel capacity is the optimization equation of the target. After the optimization equation is established, the maximum value of the channel capacity can be obtained according to the optimization method, and the maximum value is the first power allocation value of each subcarrier in the SC-FDE system. Among them, the optimization method may include a Lagrangian extreme value algorithm, a greedy algorithm, and the like. For the OFDM system, the manner of determining the second power allocation value is similar to the manner of determining the first power allocation value, and details are not described herein again.

Step 305: Determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameters.

Step 305 is similar to step 102, and details are not described herein again.

Step 306: Perform linear weighting on the first power allocation value and the second power allocation value according to the first weight value and the second weight value to obtain a third power allocation value.

p _wfrft,i =g ₁ p _sc,i +g ₂ p _ofdm,i (6)

After the third power allocation value is obtained, steps 207 to 210 in the embodiment shown in FIG. 2 will be performed, and details are not described herein again.

According to the power allocation method provided by the embodiment of the present invention, the transmitting side device determines the first power allocation value of each subcarrier in the SC-FDE system and the second power allocation of each subcarrier in the OFDM system according to the fading value of each subcarrier. And determining a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter, and determining the hybrid according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value a third power allocation value of each subcarrier in the carrier system, and performing power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value. Since the power allocation modes of the SC-FDE system and the OFDM system are comprehensively considered, the power distribution of the hybrid carrier system is performed, thereby improving the communication performance of the system. In addition, the third power value is calculated by linearly weighting the first power value and the second power value, thereby reducing the error rate of the system.

Optionally, the sending side device may send indication information to the receiving side device, where the indication information is used to indicate whether to use the third power allocation value to perform power allocation on the input signals on each subcarrier in the hybrid carrier system.

Specifically, the transmitting device may send, to the receiving device, at least one bit of indication information, where the indication information is used to indicate whether the third power allocation value is used on each subcarrier in the hybrid carrier system during the current signal transmission. The input signal is used for power distribution. For example, if the indication information is 1, the transmitting device notifies the receiving device to perform power allocation on the input signals on each subcarrier in the hybrid carrier system by using the third power allocation value, and it is worth noting that when the third power allocation is confirmed For the value, it is necessary to further determine which known power allocation mode is adopted for each of the OFDM system and the SC-FDE system. If there are N possible power allocation modes, at least log ₂ N bits are required in the indication information to represent the allocation mode. If the indication information is 0, the transmitting device notifies the receiving device not to use the third power allocation value to perform power allocation on the input signals on each subcarrier in the hybrid carrier system.

FIG. 4 is a schematic flowchart diagram of Embodiment 4 of a power distribution method according to the present invention. In this embodiment, based on the first embodiment of the power allocation method, an embodiment for determining a third allocated power value for the receiving device is described in detail. As shown in FIG. 4, the method in this embodiment may include:

Step 401, according to the formula

Step 402, according to the formula

Step 403: Determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter.

Step 404: Perform linear weighting on the first power allocation value and the second power allocation value according to the first weight value and the second weight value to obtain a third power allocation value.

Steps 401 to 404 are similar to steps 201 to 204, and are not described herein again.

It should be noted that, after the third-power allocation value of each sub-carrier in the hybrid carrier system is calculated, the receiving-side device needs to send the third power allocation value to the sending-side device, so that the two parties allocate according to the same third power. The value is processed by the signal.

Step 405: sequentially perform analog/digital conversion, remove cyclic prefix, serial/parallel conversion, and N-point DFT transform on the processed signal to obtain a second frequency domain signal.

In this embodiment, after the transmitting device transmits the processing signal to the receiving device, the receiving device first performs analog/digital conversion on the processed signal to convert the analog signal into a digital signal, and then loops the digital signal. The prefix is removed, and the digital signal with the cyclic prefix removed is serial/parallel converted to obtain the N-channel converted signal, and the N-channel converted signal is subjected to N-point DFT transform to obtain a second frequency domain signal R: R=HP _Wfrft D+FN ₀ , where H=diag(h _i ), h _i represents the fading value of each frequency point in the frequency selective fading channel, and P _wfrft represents the third power allocation value of each subcarrier in the hybrid carrier system, and

F is a DFT matrix, and N ₀ represents a Gaussian white noise.

Step 406: Perform frequency domain zero-forcing equalization ZF processing on the second frequency domain signal according to the equalization matrix to obtain an equalized signal.

In this embodiment, the equalization matrix Z may be an inverse matrix of H, that is, Z=H ^-1 . It can be understood by those skilled in the art that the prior art zero-forcing (Zero-Forcing; ZF) is utilized. The algorithm performs frequency domain linear equalization processing on the second frequency domain signal R to obtain an equalized signal.

Step 407: Perform power extraction on the equalized signal, and perform WFRFT processing of α-1 order on the equalized signal after the extracted power to obtain the input signal.

In this embodiment, since the transmitting device and the receiving device use a unified power allocation policy, after the receiving device obtains the equalization signal, the power allocation policy corresponding to the transmitting device is used to extract the allocation of the device on the transmitting device. Power, in the specific implementation process, can be extracted according to the following ways:

among them,

_As an inverse matrix of P _wfrft , it can be seen that power distribution of the signal in the frequency domain can reduce the influence of noise on signal transmission in the frequency domain.

After the power extraction is completed, the receiving side device performs the WFRFT processing of the α-1 order on the equalized signal K after the extracted power according to the formula (3), and obtains the signal X'=(x' ₁ , x' ₂ ..., x' _N ^{T is} the input signal sent by the transmitting device.

According to the power allocation method provided by the embodiment of the present invention, the receiving side device determines the first power allocation value and orthogonal frequency division multiplexing of each subcarrier in the single carrier frequency domain equalized SC-FDE system according to the fading value of each subcarrier. a second power allocation value of each subcarrier in the OFDM system, and determining a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter, according to the first power allocation value, the second power allocation value, and The first weight value and the second weight value determine a third power allocation value of each subcarrier in the hybrid carrier system, and perform power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value. Due to the comprehensive consideration of the power allocation method of the SC-FDE system and the OFDM system, the work is performed on the hybrid carrier system. Rate allocation, which improves the communication performance of the system. In addition, the third power value is calculated by linearly weighting the first power value and the second power value, thereby reducing the error rate of the system.

FIG. 5 is a schematic flowchart diagram of Embodiment 5 of a power allocation method according to the present invention. In this embodiment, based on the first embodiment of the power allocation method, an embodiment for determining a third allocated power value for the receiving device is described in detail. As shown in FIG. 5, the method in this embodiment may include:

Step 501: Establish an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel.

Step 502: Obtain a maximum value of the channel capacity by using an optimization algorithm, and use a maximum value of the channel capacity as the first power allocation value.

Step 503: Establish an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel.

Step 504: Obtain a maximum value of the channel capacity by using an optimization algorithm, and use a maximum value of the channel capacity as the second power allocation value.

Step 505: Determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameters.

Step 506: Perform linear weighting on the first power allocation value and the second power allocation value according to the first weight value and the second weight value to obtain a third power allocation value.

Step 501 - Step 506 is similar to steps 301-306, and details are not described herein again.

After the third power allocation value is obtained, steps 205 to 407 in the embodiment shown in FIG. 4 will be performed, and details are not described herein again.

According to the power allocation method provided by the embodiment of the present invention, the receiving side device determines the first power allocation value and OFDM of each subcarrier in the SC-FDE system according to the fading value of each subcarrier. a second power allocation value of each subcarrier in the system, and determining a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter, according to the first power allocation value, the second power allocation value, and the A weight value and a second weight value determine a third power allocation value of each subcarrier in the hybrid carrier system, and perform power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value. Since the power allocation modes of the SC-FDE system and the OFDM system are comprehensively considered, the power distribution of the hybrid carrier system is performed, thereby improving the communication performance of the system. In addition, the third power value is calculated by linearly weighting the first power value and the second power value, thereby reducing the error rate of the system.

FIG. 6 is a signaling diagram of Embodiment 6 of a power allocation method according to the present invention. In this embodiment, based on the foregoing embodiments, the technical solution of the present invention is described in detail by taking the third power allocation value as determined by the transmitting device. As shown in FIG. 6, the method in this embodiment may include:

Step 601: The transmitting device periodically weights the first power allocation value and the second power allocation value according to the first weight value and the second weight value to obtain a third power allocation value.

Specifically, the transmitting device needs to first determine the first power allocation value and the second power allocation value, and the first weight value and the second weight value, and then linearize the determined first power allocation value and the second power allocation value. Weighting to obtain a third power allocation value.

Step 602: The transmitting device sends the third power allocation value to the receiving device.

Step 603: The transmitting side device performs serial/parallel conversion on the input signal, and performs WFRFT conversion of -α+1 order to obtain the first frequency domain signal.

Specifically, the transmitting side device performs serial/parallel conversion on the input signal to obtain a conversion signal of the M channel, where M is a positive integer, and after obtaining the conversion signal of the M channel, performing WFRFT conversion of -α+1 order, The first frequency domain signal.

Step 604: The transmitting device performs power allocation on the first frequency domain signal according to the third power allocation value.

Step 605: The sending side device sends the first frequency domain signal to the receiving side device.

Specifically, before transmitting the first frequency domain signal to the receiving side device, the transmitting side device needs to perform N-point IDFT transform on the first frequency domain signal to obtain an IDFT transformed signal, and then perform parallel/serial conversion on the IDFT transformed signal. Obtaining a conversion signal, adding a cyclic prefix to the one conversion signal, obtaining a processing signal, and finally performing digital/analog conversion on the processing signal to obtain a conversion signal, and transmitting the obtained conversion signal to the receiving side device.

Step 606: The receiving device extracts power of the converted signal to obtain an equalized signal after the extracted power.

Specifically, after receiving the conversion signal, the receiving side device sequentially performs analog/digital conversion, remove cyclic prefix operation, serial/parallel conversion, and N-point DFT transform on the converted signal to obtain a second frequency domain signal, which is obtained in the pair. The second frequency domain signal performs frequency domain zero-forcing equalization ZF processing to obtain an equalized signal, and finally extracts power of the equalized signal to obtain an equalized signal after extracting power.

Step 607: The receiving side device performs WFRFT processing of α-1 order on the equalized signal after the extracted power, to obtain an input signal.

It should be noted that, in the foregoing embodiment, the step 401-step 403 can also be performed by the receiving device, and the execution process and principle are similar to the execution process and principle of the transmitting device, and details are not described herein again.

FIG. 7 is a schematic structural diagram of Embodiment 1 of a power distribution apparatus according to the present invention. As shown in FIG. 7, the power distribution apparatus provided by the embodiment of the present invention includes a determining module 11 and an allocating module 12.

The determining module 11 is configured to determine, according to the fading value of each subcarrier, a first power allocation value of each subcarrier in the single carrier frequency domain equalization SC-FDE system and a first subcarrier of the orthogonal frequency division multiplexing OFDM system. a second power allocation value; the determining module 11 is further configured to determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to a preset parameter; the first weight value is used to indicate Deriving a proportion of a first power allocation value in the hybrid carrier system, where the second weight value is used to indicate a proportion of the second power allocation value in the hybrid carrier system, the hybrid carrier The system is the SC-FDE system and the OFDM system a system comprising a system; the determining module 11 is further configured to determine each child in the hybrid carrier system according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value a third power allocation value of the carrier; the allocating module 12 is configured to perform power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value.

The power distribution apparatus provided by the embodiment of the present invention determines the first power allocation value of each subcarrier in the single carrier frequency domain equalization SC-FDE system and the orthogonal frequency division multiplexing OFDM system according to the fading value of each subcarrier. a second power allocation value of each subcarrier, and determining a first weight value of the SC-FDE system and a second weight value of the OFDM system according to the preset parameter, according to the first power allocation value, the second power allocation value, and the first weight The value and the second weight value determine a third power allocation value of each subcarrier in the hybrid carrier system, and perform power allocation on the input signal on each subcarrier in the hybrid carrier system according to the third power allocation value. Since the power allocation modes of the SC-FDE system and the OFDM system are comprehensively considered, the power distribution of the hybrid carrier system is performed, thereby improving the communication performance of the system.

Optionally, the determining module 11 is configured to perform linear weighting on the first power allocation value and the second power allocation value according to the first weight value and the second weight value, to obtain the The third power allocation value.

Optionally, the determining module 11 is specifically configured to establish, according to the fading value of each subcarrier and an equalization algorithm of the channel, an optimization equation that targets a maximum channel capacity;

Optionally, the determining module 11 is specifically configured according to a formula

Optionally, the determining module 11 is specifically configured to:

Obtaining a maximum value of the channel capacity by an optimization algorithm, and obtaining the channel capacity The maximum value is taken as the second power allocation value.

among them,

FIG. 8 is a schematic structural diagram of a second embodiment of a power distribution apparatus according to the present invention. As shown in FIG. 8, the present embodiment is based on the embodiment shown in FIG.

The converting unit 121 is configured to perform serial/parallel conversion and -α+1 order weighted fractional Fourier transform WFRFT transform on the input signal to obtain a first frequency domain signal;

The allocating unit 122 is configured to perform power allocation on the first frequency domain signal according to the third power allocation value.

The power distribution device of this embodiment may be used to implement the technical solution of the power distribution method provided by any embodiment of the present invention, and the implementation principle and technical effects thereof are similar, and details are not described herein again.

FIG. 9 is a schematic structural diagram of Embodiment 3 of a power distribution apparatus according to the present invention. As shown in FIG. 9, the present embodiment further includes: a processing module 13, a conversion module 14, and a sending module 15 on the basis of the foregoing embodiments. .

The processing module 13 is configured to sequentially perform an N-point discrete Fourier transform IDFT, a parallel/serial conversion, and a cyclic prefix process on the first frequency domain signal to obtain a processing signal.

The conversion module 14 is configured to perform digital/analog conversion on the processed signal to obtain a converted signal;

The transmitting module 15 is configured to send the conversion signal to the receiving side device.

Optionally, the sending module 15 is further configured to send indication information to the receiving side device, where the indication information is used to indicate whether to use the third power allocation value to perform power on an input signal on each subcarrier in the hybrid carrier system. distribution.

FIG. 10 is a schematic structural diagram of Embodiment 4 of a power distribution device according to the present invention, as shown in FIG. The power distribution device provided by the embodiment of the present invention includes a determining module 21 and an allocating module 22.

The determining module 21 is configured to determine, according to the fading value of each subcarrier, a first power allocation value of each subcarrier in the single carrier frequency domain equalization SC-FDE system and a first subcarrier of the orthogonal frequency division multiplexing OFDM system. a second power allocation value; the determining module 21 is further configured to determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to a preset parameter; the first weight value is used to indicate Calculating a proportion of the first power allocation value in the hybrid carrier system, where the second weight value is used to indicate a proportion of the second power allocation value in the hybrid carrier system; 21 is further configured to determine, according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value, a third power allocation value of each subcarrier in the hybrid carrier system; The module 22 is configured to perform power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value.

Optionally, the determining module 21 is configured to perform linear weighting on the first power allocation value and the second power allocation value according to the first weight value and the second weight value, to obtain the The third power allocation value.

Optionally, the determining module 21 is specifically configured according to a formula

among them,

E _b represents the energy per bit signal, and N ₀ represents the noise power spectral density.

FIG. 11 is a schematic structural diagram of Embodiment 5 of a power distribution apparatus according to the present invention. As shown in FIG. 11, this embodiment is based on the embodiment shown in FIG. 10, and the apparatus further includes: a conversion module 23, a processing module 24, and a sending Module 25.

The conversion module 23 is further configured to sequentially perform analog/digital conversion on the converted signal, remove the cyclic prefix, serial/parallel conversion, and N-point DFT transform to obtain a second frequency domain signal.

The processing module 24 is further configured to perform frequency domain zero-forcing equalization ZF processing on the second frequency domain signal according to the equalization matrix to obtain an equalized signal;

The processing module 24 is further configured to perform power extraction on the equalized signal, and perform WFRFT processing of α-1 order on the equalized signal after the extracted power to obtain the input signal.

FIG. 12 is a schematic structural diagram of Embodiment 1 of a transmitting device according to the present invention. As shown in FIG. 12, the transmitting side device 110 provided in this embodiment includes a processor 1101 and a memory 1102. The transmitting side device may further include a transmitter 1103. The transmitter 1103 is connected to the processor 1101. The memory 1102 stores execution instructions. When the transmitting device operates, the processor 1101 communicates with the memory 1102, and the processor 1101 calls an execution instruction in the memory 1102 to perform the following operations:

Determining, according to preset parameters, a first weight value of the SC-FDE system and a second weight value of the OFDM system; the first weight value is used to indicate that the first power allocation value is in the hybrid carrier system a proportion of the second weight value used to represent the proportion of the second power allocation value in the hybrid carrier system, the hybrid carrier system being the SC-FDE system and the OFDM system System of components;

The device on the transmitting side provided by this embodiment may be used to implement the technical solution of the power allocation method provided by any embodiment of the present invention. The implementation principle and technical effects are similar, and details are not described herein again.

Optionally, the processor 1101 is further configured to perform linear weighting on the first power allocation value and the second power allocation value according to the first weight value and the second weight value, to obtain the The third power allocation value.

Optionally, the processor 1101 is further configured to establish, according to the fading value of each subcarrier and an equalization algorithm of the channel, an optimization equation that targets a maximum channel capacity;

Optionally, the processor 1101 is further configured to

among them,

Optionally, the processor 1101 is further configured to perform serial/parallel conversion and -α+1 order weighted fractional Fourier transform WFRFT transform on the input signal to obtain a first frequency domain signal;

And performing power allocation on the first frequency domain signal according to the third power allocation value.

Optionally, the processor 1101 is further configured to sequentially perform an N-point discrete Fourier transform IDFT, a parallel/serial conversion, and a cyclic prefix process on the first frequency domain signal to obtain a processing signal.

Performing digital/analog conversion on the processed signal to obtain a converted signal;

The transmitter 1103 is further configured to send the conversion signal to a receiving side device.

Optionally, the transmitter 1103 is further configured to send indication information to the receiving side device, where the indication information is used to indicate whether the third power allocation value is used to input signals on each subcarrier in the hybrid carrier system. Perform power distribution.

FIG. 13 is a schematic structural diagram of Embodiment 1 of a receiving device according to the present invention. As shown in FIG. 13, the receiving side device 120 provided in this embodiment includes a processor 1201 and a memory 1202. The receiving side device may further include a receiver 1203. The receiver 1203 is connected to the processor 1201. The receiver 1203 is configured to receive a conversion signal sent by the transmitting device, the memory 1202 stores an execution instruction, and when the receiving device operates, the processor 1201 communicates with the memory 1202, and the processor 1201 invokes the execution instruction in the memory 1202. Used to do the following:

The receiving side device provided by this embodiment may be used to implement the technical solution of the power allocation method provided by any embodiment of the present invention, and the implementation principle and technical effects thereof are similar, and details are not described herein again.

Those skilled in the art can understand that all or part of the above method embodiments are implemented. The sub-steps can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A power distribution method, comprising:

Determining, according to a fading value of each subcarrier, a first power allocation value of each subcarrier in a single carrier frequency domain equalization SC-FDE system and a second power allocation value of each subcarrier in an orthogonal frequency division multiplexing OFDM system;

Determining, according to preset parameters, a first weight value of the SC-FDE system and a second weight value of the OFDM system; the first weight value is used to indicate that the first power allocation value is occupied by a hybrid carrier system The second weight value is used to represent the proportion of the second power allocation value in the hybrid carrier system, and the hybrid carrier system is composed of the SC-FDE system and the OFDM system. system;

Determining, according to the first power allocation value, the second power allocation value, the first weight value, and the second weight value, a third power allocation value of each subcarrier in the hybrid carrier system, and according to the The third power allocation value performs power allocation on an input signal on each subcarrier in the hybrid carrier system.
The method according to claim 1, wherein the determining is based on the first power allocation value, the second power allocation value, and the first weight value and the second weight value in a hybrid carrier system The third power allocation value of each subcarrier includes:

And performing, according to the first weight value and the second weight value, linearly weighting the first power allocation value and the second power allocation value to obtain the third power allocation value.
The method according to claim 1 or 2, wherein the determining the first power allocation value of each subcarrier in the single carrier frequency domain equalization SC-FDE system according to the fading value of each subcarrier comprises:

Establishing an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel;

The maximum value of the channel capacity is obtained by an optimization algorithm, and the maximum value of the channel capacity is used as the first power allocation value.
The method according to claim 1 or 2, wherein the determining the first power allocation value of each subcarrier in the single carrier frequency domain equalization SC-FDE system according to the fading value of each subcarrier comprises:

According to the formula
Determining a first power allocation value p sc,i of the i-th subcarrier in the SC-FDE system;

Where N represents the length of the discrete Fourier transform DFT; h i represents the fading value of the i-th frequency point on the channel.
The method according to any one of claims 1-4, wherein the determining the second power allocation value of each subcarrier in the OFDM system according to the fading value of each subcarrier includes:

Establishing an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel;

The maximum value of the channel capacity is obtained by an optimization algorithm, and the maximum value of the channel capacity is used as the second power allocation value.
The method according to any one of claims 1-4, wherein the determining the second power allocation value of each subcarrier in the OFDM system according to the fading value of each subcarrier includes:

According to the formula
Determining a second power allocation value p ofdm,i of the i-th subcarrier in the OFDM system;

among them,
γ represents the signal-to-noise ratio, E b represents the energy per bit signal, and N 0 represents the noise power spectral density.
The method according to any one of claims 1-6, wherein the performing power allocation on an input signal on each subcarrier in the hybrid carrier system according to the third power allocation value comprises:

Performing serial/parallel conversion and -α+1 order weighted fractional Fourier transform WFRFT transform on the input signal to obtain a first frequency domain signal;

And performing power allocation on the first frequency domain signal on each subcarrier according to the third power allocation value.
The method according to claim 7, wherein after the power allocation of the first frequency domain signal according to the third power allocation value, the method further includes:

Performing an N-point discrete Fourier transform IDFT, parallel/serial conversion, and adding cyclic prefix processing on the first frequency domain signal in sequence to obtain a processed signal;

The processed signal is subjected to digital-to-analog conversion to obtain a converted signal, and the converted signal is transmitted to a receiving side device.
The method according to claim 8, wherein after the transmitting the signal to the receiving device, the method further comprises:

Performing analog-to-digital conversion on the converted signal, removing the cyclic prefix, serial/parallel conversion, and N-point DFT transform to obtain a second frequency domain signal;

Performing frequency domain zero-forcing equalization ZF processing on the second frequency domain signal according to the equalization matrix to obtain an equalized signal;

The equalized signal is extracted by power, and the equalized signal after the extracted power is subjected to WFRFT processing of α-1 order to obtain the input signal.
The method of any of claims 1-9, further comprising:

And transmitting, to the receiving device, indication information, where the indication information is used to indicate whether to use the third power allocation value to perform power allocation on an input signal on each subcarrier in the hybrid carrier system.
A power distribution device, comprising:

a determining module, configured to determine, according to a fading value of each subcarrier, a first power allocation value of each subcarrier in a single carrier frequency domain equalization SC-FDE system and a second power of each subcarrier in an orthogonal frequency division multiplexing OFDM system Assignment value

The determining module is further configured to determine a first weight value of the SC-FDE system and a second weight value of the OFDM system according to a preset parameter; the first weight value is used to indicate the first power allocation The proportion of the value in the hybrid carrier system, the second weight value is used to indicate the proportion of the second power allocation value in the hybrid carrier system, and the hybrid carrier system is the SC-FDE a system consisting of the system and the OFDM system;

The determining module is further configured to determine, according to the first power allocation value, the second power allocation value, and the first weight value and the second weight value, a third power of each subcarrier in the hybrid carrier system. Assignment value

And an allocating module, configured to perform power allocation on the input signals on each subcarrier in the hybrid carrier system according to the third power allocation value.
The apparatus according to claim 11, wherein the determining module is configured to allocate the first power value and the second power according to the first weight value and the second weight value. The assigned values are linearly weighted to obtain the third power allocation value.
The device according to claim 11 or 12, wherein the determining module is specifically configured to:

Establishing an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel;

The maximum value of the channel capacity is obtained by an optimization algorithm, and the maximum value of the channel capacity is used as the first power allocation value.
The device according to claim 11 or 12, wherein the determining module is specifically configured to:

According to the formula
Determining a first power allocation value p sc,i of the i-th subcarrier in the SC-FDE system;

Where N represents the length of the discrete Fourier transform DFT; h i represents the fading value of the i-th frequency point on the channel.
The device according to any one of claims 11 to 14, wherein the determining module is specifically configured to:

Establishing an optimization equation targeting the maximum channel capacity according to the fading value of each subcarrier and the equalization algorithm of the channel;

The maximum value of the channel capacity is obtained by an optimization algorithm, and the maximum value of the channel capacity is used as the second power allocation value.
The apparatus according to any one of claims 11 to 14, wherein the determining module is specifically configured according to a formula
Determining a second power allocation value p ofdm,i of the i-th subcarrier in the OFDM system;

among them,
γ represents the signal-to-noise ratio, E b represents the energy per bit signal, and N 0 represents the noise power spectral density.
The device according to any one of claims 11-16, wherein the distribution module comprises:

a converting unit, configured to perform serial/parallel conversion and -α+1 order weighted fractional Fourier transform WFRFT transform on the input signal to obtain a first frequency domain signal;

And an allocating unit, configured to perform power allocation on the first frequency domain signal on each subcarrier according to the third power allocation value.
The device according to claim 17, wherein the device further comprises:

a processing module, configured to sequentially perform N-point discrete Fourier transform IDFT, parallel/serial conversion, and add cyclic prefix processing on the first frequency domain signal to obtain a processing signal;

a conversion module, configured to perform digital/analog conversion on the processed signal to obtain a converted signal;

And a sending module, configured to send the conversion signal to the receiving side device.
The apparatus according to claim 18, wherein the conversion module is further configured to sequentially perform analog/digital conversion on the converted signal, remove the cyclic prefix, serial/parallel conversion, and N-point DFT transform to obtain Second frequency domain signal;

The processing module is further configured to perform frequency domain zero-forcing equalization ZF processing on the second frequency domain signal according to the equalization matrix to obtain an equalized signal;

The processing module is further configured to perform power extraction on the equalized signal, and perform WFRFT processing of α-1 order on the equalized signal after extracting power to obtain the input signal.
The device according to any one of claims 11 to 19, wherein the sending module is further configured to send indication information to the receiving side device, where the indication information is used to indicate whether the third power allocation value is adopted. Power allocation is performed on input signals on each subcarrier in the hybrid carrier system.