WO2020135408A1 - Procédé et appareil d'estimation de phase de porteuse, dispositif et support de stockage lisible par ordinateur - Google Patents

Procédé et appareil d'estimation de phase de porteuse, dispositif et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2020135408A1
WO2020135408A1 PCT/CN2019/127871 CN2019127871W WO2020135408A1 WO 2020135408 A1 WO2020135408 A1 WO 2020135408A1 CN 2019127871 W CN2019127871 W CN 2019127871W WO 2020135408 A1 WO2020135408 A1 WO 2020135408A1
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Prior art keywords
phase angle
phase
value
angle
error value
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PCT/CN2019/127871
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English (en)
Chinese (zh)
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张良俊
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中兴通讯股份有限公司
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Publication of WO2020135408A1 publication Critical patent/WO2020135408A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/61—Coherent receivers
    • H04B10/616—Details of the electronic signal processing in coherent optical receivers
    • H04B10/6165—Estimation of the phase of the received optical signal, phase error estimation or phase error correction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/61—Coherent receivers

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a carrier phase estimation method, device, device, and computer-readable storage medium.
  • phase noise will cause serious degradation of system performance, so we need to correctly estimate and compensate for phase noise.
  • Coherent digital receivers are commonly used in coherent optical communication system receivers. Coherent digital receivers can compensate for transmission impairments in the received signal in the digital domain, such as chromatic dispersion compensation, polarization mode dispersion compensation, clock recovery, frequency offset compensation, and phase Compensation, etc.
  • the current mainstream phase estimation and compensation algorithms include Vertebi-Vertebi algorithm and blind phase search algorithm.
  • the V-V algorithm is suitable for QPSK (Quadrature Phase Shift Keying) modulation format, but for high-order QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) compensation capacity is limited.
  • the traditional blind phase search algorithm is transparent to the modulation format, but the algorithm complexity is too high, which is not conducive to hardware implementation
  • the main purpose of the present disclosure is to provide a carrier phase estimation method, device, equipment, and computer storage medium, aimed at solving the technical problem that the current algorithm is too complicated to estimate the phase noise and compensate, which is not conducive to hardware implementation.
  • the present disclosure provides a carrier phase estimation method, which includes: performing digital signal processing on the signal to be measured obtained in the current symbol to obtain a phase noise signal with only phase noise; Rotate the phase noise signal based on each preset test angle to obtain each rotation signal, and obtain an error value corresponding to each rotation signal based on an error function; obtain a minimum error value among each of the error values, and determine the minimum value
  • the phase angle corresponding to the error value and the two phase angles adjacent to the left and right of the phase angle based on the phase angle corresponding to the minimum error value and the minimum error value and the two phases adjacent to the left and right of the phase angle
  • the angle determines the optimal phase angle; each estimated phase angle before the current symbol is acquired, and a target phase angle is determined based on the optimal phase angle and each estimated phase angle.
  • the present disclosure also provides a carrier phase estimation device.
  • the carrier phase estimation device includes: a signal processing unit configured to perform digital signal processing on the signal under test acquired in the current symbol to obtain only A phase noise signal with phase noise; a rotation unit for rotating the phase noise signal based on each preset test angle to obtain each rotation signal, and obtaining an error value corresponding to each rotation signal based on an error function; an obtaining unit, It is used to obtain the minimum error value of each of the error values, and determine the phase angle corresponding to the minimum error value and the two phase angles adjacent to the left and right of the phase angle; The phase angle corresponding to the value and the minimum error value and the two phase angles adjacent to the left and right of the phase angle determine the optimal phase angle; the phase angle unit is used to obtain each estimated phase angle before the current symbol, And determine the target phase angle based on the optimal phase angle and each of the estimated phase angles.
  • the present disclosure also provides a carrier phase estimation device;
  • the carrier phase estimation device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, Wherein, when the computer program is executed by the processor, the steps of the carrier phase estimation method described above are implemented.
  • the present disclosure also provides a computer-readable storage medium; the computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the carrier phase estimation method as described above is implemented step.
  • FIG. 1 is a schematic diagram of a terminal ⁇ device structure of a hardware operating environment involved in a solution of an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a first embodiment of a carrier phase estimation method of the present disclosure
  • FIG. 3 is a schematic flowchart of a second embodiment of a carrier phase estimation method of the present disclosure
  • FIG. 5 is a schematic diagram of a phase noise estimation device of the present disclosure
  • FIG. 7 is a comparison of the performance of the conventional unwinding scheme and the scheme of the present disclosure.
  • FIG. 1 is a schematic diagram of a terminal structure of a hardware operating environment involved in a solution of an embodiment of the present disclosure.
  • the terminal of the embodiment of the present disclosure is a carrier phase estimation device.
  • the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002.
  • the communication bus 1002 is used to implement connection communication between these components.
  • the user interface 1003 may include a display (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
  • the network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).
  • the memory 1005 may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as a disk memory.
  • the memory 1005 may optionally be a storage device independent of the foregoing processor 1001.
  • the terminal may further include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and so on.
  • sensors such as light sensors, motion sensors and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display screen according to the brightness of the ambient light, and the proximity sensor may turn off the display screen when the terminal device moves to the ear And/or backlight.
  • the terminal device can also be configured with other sensors such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, which will not be repeated here.
  • FIG. 1 does not constitute a limitation on the terminal, and may include more or less components than those illustrated, or combine certain components, or have different component arrangements.
  • the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a carrier phase estimation program.
  • the network interface 1004 is mainly used to connect to the background server and perform data communication with the background server;
  • the user interface 1003 is mainly used to connect to the client (user) and perform data communication with the client;
  • the processor 1001 can be used to call the carrier phase estimation program stored in the memory 1005 and perform the following operations: perform digital signal processing on the signal under test acquired in the current symbol to obtain a phase noise signal with only phase noise; Set the test angle to rotate the phase noise signal to obtain each rotation signal, and obtain the error value corresponding to each rotation signal based on the error function; obtain the minimum error value among each of the error values, and determine the corresponding minimum error value Phase angle and two phase angles adjacent to the left and right of the phase angle; based on the minimum error value and the phase angle corresponding to the minimum error value and two phase angles adjacent to the left and right of the phase angle to determine the most Optimal phase angle; acquiring each estimated phase angle before the current symbol, and determining a target phase angle based on the optimal phase angle and each of the estimated phase
  • the present disclosure provides a carrier phase estimation method.
  • the carrier phase estimation method includes the following steps:
  • Step S10 Perform digital signal processing on the signal under test acquired in the current symbol to obtain a phase noise signal with only phase noise;
  • a symbol can be a binary number represented by a symbol with the same time interval in digital communication.
  • Phase noise can refer to the random changes in the phase of the system output signal caused by the system (such as various RF devices) under the action of various noises, and is an important indicator to measure the quality of the frequency standard source frequency stability.
  • the front-end digital signal processing is performed by the signal under test received by the receiving end, including signal processing such as delay adjustment, DC removal, dispersion compensation, clock synchronization, polarization demultiplexing, frequency offset compensation, etc. Phase noise signal with only phase noise.
  • Step S20 Rotate the phase noise signal based on each preset test angle to obtain each rotation signal, and obtain an error value corresponding to each rotation signal based on an error function;
  • the preset test angle may be each test angle set by the user in advance. After obtaining the preset test angle, it is necessary to use the preset test angle to rotate the phase noise signal to obtain its corresponding rotation signal, and calculate the error value corresponding to the rotation function by means of the error function calculation. It should be noted that each preset test angle has a corresponding rotation signal, that is, an error value.
  • the way to calculate the error value by using the error function may be to first select a modulation format, and then determine the constellation map after the rotation signal is mapped according to the modulation format, and determine the mapping value (D1, D2, D3) corresponding to the rotation signal in the constellation map ), and it is also necessary to obtain the real and imaginary values in the rotation signal at this time.
  • the mapping value D1 from the absolute value of the real part value to get the first real part difference
  • the absolute value of the first real part difference to subtract the mapping value D2 to get the second real part Difference
  • the absolute value of the second real difference to subtract the mapping value D3 to get the third real difference
  • the imaginary part value in the rotation signal is also subtracted from the mapping value (D1, D2, D3) to obtain the third imaginary part difference
  • the absolute imaginary part difference of this third imaginary part difference is determined, and then The absolute real part difference and the absolute real part difference are added to obtain the difference calculated this time.
  • the error calculated by each symbol and the errors calculated by several symbols before and after it are summed and averaged to obtain the error value corresponding to the rotation signal.
  • -D1, I2
  • -D2, I3
  • -D3; Q1
  • -D1, Q2
  • -D2, Q3
  • -D3; e
  • real(Sk, b) represents the real part of the signal to be measured
  • Imag(Sk, b) represents the imaginary part of the signal to be tested, and e is the error value.
  • D1, D2, and D3 are mapping values, and the values of D1, D2, and D3 are related to the modulation format.
  • D1, D2, and D3 take the values 1, 0, and 0, respectively.
  • D1, D2, and D3 take the values 2, 1, 0, respectively.
  • D1, D2, and D3 take the values 4, 2, and 1, respectively.
  • Step S30 Obtain the minimum error value among each of the error values, and determine the phase angle corresponding to the minimum error value and the two phase angles adjacent to the left and right of the phase angle;
  • the minimum error value of each error value needs to be determined, and then the phase angle with the smallest error is determined according to the minimum error value And the two phase angles adjacent to it with And the relationship between these three phase angles should satisfy
  • the corresponding error values are e1, e2, and e3, which satisfy the relationship e1 ⁇ e2 ⁇ e3. It should also be noted that if the phase angle with the smallest error Is the first phase angle, then Take the last phase angle, e1 takes the corresponding error value. in case Is the last phase angle, then Take the first phase angle, e3 takes the corresponding error value.
  • the phase angle may be phase noise.
  • Step S40 Determine an optimal phase angle based on the minimum error value and the phase angle corresponding to the minimum error value and two phase angles adjacent to the left and right of the phase angle;
  • interpolation calculation can be performed to obtain the optimal phase angle ⁇ .
  • the calculation formula is as follows: Where B is the number of test corners.
  • Step S50 Obtain each estimated phase angle before the current symbol, and determine a target phase angle based on the optimal phase angle and each estimated phase angle.
  • the optimal phase angle in the current symbol After the optimal phase angle in the current symbol is obtained, the optimal phase angle needs to be unwound.
  • the final ⁇ ′ obtained is the phase noise estimated by this scheme, that is, the target phase angle.
  • the effect of the unwinding operation is exemplified. For example, as shown in FIG.
  • phase noise estimation method To assist in understanding the phase noise estimation method in the present disclosure, an example will be described below.
  • the signal to be measured when the signal to be measured is acquired, the signal to be measured needs to be rotated according to the test angle (test angle 1, test angle 2...test angle B), and the various functions are calculated according to the error function calculation module
  • the error value corresponding to the test angle and then select the phase angle corresponding to the minimum error value and the two adjacent phase angles through the phase angle selection module, and calculate the optimal phase angle according to the interpolation calculation module, and finally unwind
  • the optimal phase angle estimated by the current symbol and the average value of the previous N symbols are unwrapped to obtain the final phase angle, which is the target phase angle.
  • a phase noise signal with only phase noise is obtained; the phase noise signal is rotated based on each preset test angle to obtain each rotation signal, and Obtaining an error value corresponding to each of the rotation signals based on an error function; obtaining a minimum error value among each of the error values, and determining a phase angle corresponding to the minimum error value and two phases adjacent to the phase angle Angle; determine the optimal phase angle based on the minimum error value and the phase angle corresponding to the minimum error value and two phase angles adjacent to the left and right of the phase angle; obtain each estimated phase angle before the current symbol And determine the target phase angle based on the optimal phase angle and each of the estimated phase angles.
  • the error function By using the error function to calculate the corresponding error value for the obtained signal under test, compared with the traditional calculation method using a large number of multipliers, the number of test angles is reduced, and the calculation complexity of the error function is greatly reduced , And in determining the target phase angle, that is, the estimated phase noise, in addition to estimating the current optimal phase angle, it is also related to the previously obtained estimated phase angle, thereby effectively reducing the probability of phase slip, and improving the system
  • the performance has achieved the technical effect of greatly reducing the complexity of the algorithm without reducing the accuracy of phase noise compensation, which is conducive to hardware implementation.
  • a second embodiment of the carrier phase estimation method of the present disclosure is proposed. This embodiment is a refinement of step S50 of the first embodiment of the present disclosure. Referring to FIG. 3, including:
  • Step S51 Obtain historical symbols before the current symbol, and acquire estimated phase angles corresponding to the historical symbols;
  • the historical symbol may be a symbol whose carrier phase has been estimated before the current symbol.
  • the estimated phase angle may be the estimated phase noise in the historical symbols, and each historical symbol has an estimated phase angle corresponding to it. After obtaining the optimal phase angle of the current symbol, it is also necessary to obtain each historical symbol before the current symbol, and then obtain the estimated phase angle corresponding to each historical symbol.
  • Step S52 Obtain an average value of the phase angle between the optimal phase angle and each of the estimated phase angles, and determine a target phase angle based on the optimal phase angle and the average phase angle.
  • the average value of the phase angle may be an average value obtained by averaging the optimal phase angle and each estimated phase angle. After obtaining the optimal phase angle and each estimated phase angle, determine the total number of the optimal phase angle and each estimated phase angle, and calculate the average value of the optimal phase angle and each estimated phase angle according to the total number.
  • the phases of the N symbols before the symbols estimate the angles and perform a summation and averaging process to obtain an average value.
  • the error calculated by each symbol and the errors calculated by several symbols before and after it are summed and averaged. To get the target phase angle.
  • the target phase angle is determined by calculating the average of the phase angle between the optimal phase angle and each estimated phase angle to ensure the accuracy of carrier phase estimation.
  • the step of determining the target phase angle based on the optimal phase angle and the average of the phase angles includes:
  • Step S521 Obtain the maximum preset test angle and the minimum preset test angle in each of the preset test angles, and compare the optimal phase angle with the average value of the phase angles;
  • the optimal phase angle and the average value of the phase angles need to be compared and judged, that is, the optimal phase angle is judged Whether it is greater than the sum of the average value of the phase angle and the maximum preset test angle, if it is greater, you can obtain the difference between the optimal phase angle minus the preset value, and use this difference as the target phase angle; determine the optimal Whether the phase angle is less than the sum of the average value of the phase angle and the minimum preset test angle, if it is less, the sum of the optimal phase angle and the preset value can be obtained, and the sum is used as the target phase angle.
  • the optimal phase angle is ⁇
  • the resulting ⁇ ′ is the phase noise estimated by this scheme.
  • Step S522 If the optimal phase angle is greater than the first sum value between the maximum preset test angle and the average value of the phase angles, obtain the first between the optimal phase angle and the preset angle The difference, and use the first difference as the target phase angle;
  • the first sum value is the sum of the maximum preset test angle and the average value of the phase angles.
  • the first difference is the difference between the optimal phase angle and the preset angle.
  • the preset angle can be an angle set by the user. When it is judged that the optimal phase angle is greater than the first sum value between the maximum preset test angle and the average value of the phase angles, the first difference between the optimal phase angle and the preset angle can be obtained, and the The first difference is taken as the target phase angle.
  • Step S523 If the optimal phase angle is less than the second sum between the average value of the phase angles and the minimum preset test angle, obtain the difference between the optimal phase angle and the preset angle The third sum value, and use the third sum value as the target phase angle.
  • the second sum value may be the sum value between the average value of the phase angle and the minimum preset test angle.
  • the third sum value may be the sum value between the optimal phase angle and the preset angle.
  • the target phase angle is determined by comparing the optimal phase angle with the average value of the phase angle, thereby ensuring the accuracy of obtaining the target phase angle and effectively reducing the probability of phase slip.
  • a third embodiment of the carrier phase estimation method of the present disclosure is proposed.
  • This embodiment is step S20 of the first embodiment of the present disclosure.
  • the refinement of the steps of the error value corresponding to the rotation signal includes:
  • Step S21 Obtain the modulation format corresponding to the rotation signal, and determine the mapping value in the modulation format
  • Modulation format can choose square QPSK, square 16QAM, square 32QAM, square 64QAM and square 8QAM.
  • the mapping value may be a value obtained by mapping the rotation signal through a certain modulation format, and this value is associated with the real and imaginary parts of the rotation signal. Obtain the modulation format corresponding to the rotation signal (the modulation format can be selected by the user), and then determine each mapping value according to this modulation format.
  • Step S22 Obtain the real part value and the imaginary part value in the rotation signal, and calculate the real part difference between the real part value and the map value according to an error function, the imaginary part value and the map Imaginary difference between values;
  • Step S23 Obtain an error sum value between the absolute real part difference corresponding to the real part difference and the absolute imaginary part difference corresponding to the imaginary part difference, and determine the rotation signal based on the error sum The corresponding error value.
  • the error sum value may be the error value calculated by this error function. Obtain the absolute real part difference corresponding to the real part difference and the absolute imaginary part difference corresponding to the imaginary part difference, and calculate the error sum value between the absolute real part difference and the absolute imaginary part difference, and then pass this error sum Value to determine the error value corresponding to the rotation signal.
  • the error value corresponding to the rotation signal is determined by determining the modulation format, thereby effectively ensuring the accuracy of the obtained error value of the signal, and improving the user's sense of experience.
  • the step of determining the error value corresponding to the rotation signal based on the sum value includes:
  • Step S231 Acquire the primary error value corresponding to the error sum value and the preset number of intermediate error values before the current symbol;
  • the primary error value may be an error value calculated by an error function, and the primary error value and the error sum value are equal.
  • the intermediate error value may be an error value calculated before the current symbol.
  • the preset quantity may be a quantity set by the user. After the error sum value is calculated by the error function, the primary error value corresponding to this error sum value needs to be determined, and the intermediate error value calculated by the symbol before the current symbol should be obtained. The number of the intermediate error value and the value set by the user in advance The preset number is the same.
  • Step S232 Obtain an average value of errors between the primary error value and each of the intermediate error values, and use the average value of the errors as an error value corresponding to the rotation signal.
  • the average value of the error between the primary error value and each intermediate error value needs to be calculated, and the average error value is used as the error value corresponding to the rotation signal. It should be noted that every time the rotation signal is obtained, the corresponding error average value needs to be obtained.
  • a fourth embodiment of the carrier phase estimation method of the present disclosure is proposed.
  • This embodiment is step S30 of the first embodiment of the present disclosure to obtain each of the error values Refinement of the minimum error value in the step of determining the phase angle corresponding to the minimum error value and the two phase angles adjacent to the left and right of the phase angle, including:
  • Step S31 Obtain the minimum error value among each of the error values, and determine the phase angle corresponding to the minimum error value;
  • the minimum minimum error value among each error value needs to be obtained, and the phase angle corresponding to the minimum error value is determined according to the minimum error value.
  • Step S32 judging whether the phase angle corresponding to the minimum error value in the current symbol is the primary phase angle for the first test
  • the primary phase angle may be the preset test phase angle used when the current symbol is tested for the first time. After obtaining the phase angle corresponding to the minimum error value, it is necessary to determine whether this phase angle is the primary phase angle for the first test.
  • Step S33 if the phase angle corresponding to the minimum error value is the primary phase angle for the first test, obtain the final phase angle of the last test in the current symbol, and divide the second phase in the current symbol
  • the second phase angle and the final phase angle of the second test are taken as two phase angles adjacent to the left and right of the phase angle.
  • the phase angle corresponding to the minimum error value is the primary phase angle for the first test
  • the second phase angle, and the second phase angle and the final phase angle are taken as two adjacent phase angles.
  • the ultimate phase angle may be the phase angle obtained during the last test in the current symbol.
  • the second phase angle may be the phase angle obtained during the second test in the current symbol.
  • the second phase angle by judging whether the phase angle corresponding to the minimum error value is the primary phase angle obtained during the first test, and when the phase angle corresponding to the minimum error value is the primary phase angle, the second phase angle The phase angle corresponding to the final phase angle as the minimum error value is adjacent to the left and right, thereby effectively ensuring that the phase angle corresponding to the minimum error value can be obtained at any time, and the carrier phase is improved. Estimated accuracy.
  • the step of determining whether the phase angle corresponding to the minimum error value is the primary phase angle for the first test it includes:
  • Step S34 if the phase angle corresponding to the minimum error value is not the primary phase angle for the first test, determine whether the phase angle corresponding to the minimum error value is the final phase angle for the last test;
  • phase angle corresponding to the minimum error value is not the primary phase angle obtained during the first test, it is necessary to judge again whether the phase angle corresponding to the minimum error value is the final phase angle obtained during the last test .
  • Step S35 if the phase angle corresponding to the minimum error value is the final phase angle of the last test, obtain the primary phase angle of the first test, and perform the primary phase angle and the penultimate time
  • the tested third phase angle is taken as two phase angles adjacent to the left and right of the phase angle.
  • the primary phase angle and the third phase angle are regarded as the phase angle corresponding to the minimum error value, and the two adjacent phase angles are left and right.
  • the third phase angle is the symbol obtained during the penultimate test of the current symbol.
  • an embodiment of the present disclosure also proposes a carrier phase estimation device.
  • the carrier phase estimation device includes: a signal processing unit configured to perform digital signal processing on the signal to be measured obtained in the current symbol to obtain A phase noise signal with only phase noise; a rotation unit for rotating the phase noise signal based on each preset test angle to obtain each rotation signal, and obtaining an error value corresponding to each rotation signal based on an error function; an obtaining unit , Used to obtain the minimum error value of each of the error values, and to determine the phase angle corresponding to the minimum error value and the two phase angles adjacent to the phase angle to the left and right; The phase angle corresponding to the error value and the minimum error value and the two phase angles adjacent to the left and right of the phase angle determine an optimal phase angle; a phase angle unit is used to obtain each estimated phase angle before the current symbol And determine the target phase angle based on the optimal phase angle and each of the estimated phase angles.
  • the phase angle unit is configured to: obtain each historical symbol before the current symbol, and obtain each estimated phase angle corresponding to each historical symbol; and obtain the optimal phase angle And an average value of phase angles between each of the estimated phase angles, and a target phase angle is determined based on the optimal phase angle and the average value of phase angles.
  • the phase angle unit is configured to: obtain a maximum preset test angle and a minimum preset test angle in each of the preset test angles, and combine the optimal phase angle and the phase angle Compare the average values; if the optimal phase angle is greater than the first sum between the maximum preset test angle and the average value of the phase angles, then obtain the difference between the optimal phase angle and the preset angle A first difference, and use the first difference as a target phase angle; if the optimal phase angle is less than the second sum between the average phase angle and the minimum preset test angle, obtain A third sum value between the optimal phase angle and the preset angle, and using the third sum value as the target phase angle.
  • the rotation unit is further configured to: acquire a modulation format corresponding to the rotation signal, and determine a mapping value in the modulation format; and acquire real value and imaginary value in the rotation signal And calculate the real difference between the real value and the mapped value according to the error function, the imaginary difference between the imaginary value and the mapped value; get the real difference corresponding to An error sum value between the absolute real part difference value and the absolute imaginary part difference value corresponding to the imaginary part difference value, and the error value corresponding to the rotation signal is determined based on the error sum value.
  • the rotating unit is further configured to: obtain a primary error value corresponding to the error sum value and a preset number of intermediate error values before the current symbol; obtain the primary error value and each An average value of errors between the intermediate error values, and the average value of the errors is used as an error value corresponding to the rotation signal.
  • the acquiring unit is further configured to: acquire a minimum error value among each of the error values, and determine a phase angle corresponding to the minimum error value; determine the minimum value in the current symbol Whether the phase angle corresponding to the error value is the primary phase angle for the first test; if the phase angle corresponding to the minimum error value is the primary phase angle for the first test, obtain the last test in the current symbol The final phase angle of the current symbol, and use the second phase angle of the second test in the current symbol and the final phase angle as the two phase angles adjacent to the left and right of the phase angle.
  • the acquiring unit is further configured to: if the phase angle corresponding to the minimum error value is not the primary phase angle for the first test, determine whether the phase angle corresponding to the minimum error value is the last The final phase angle for the test at a time; if the phase angle corresponding to the minimum error value is the final phase angle for the last test, obtain the primary phase angle for the first test and sum the primary phase angle
  • the third phase angle for the penultimate test is used as the two phase angles adjacent to the left and right of the phase angle.
  • the present disclosure also provides a terminal including: a memory, a processor, a communication bus, and a carrier phase estimation program stored on the memory: the communication bus is used to implement connection communication between the processor and the memory; The processor is used to execute the carrier phase estimation program to implement the steps of the above embodiments of the carrier phase estimation method.
  • the present disclosure also provides a computer-readable storage medium that stores one or more programs, and the one or more programs may also be executed by one or more processors for implementation The steps of the above embodiments of the carrier phase estimation method.
  • the implementation of the computer-readable storage medium of the present disclosure is basically the same as the above embodiments of the carrier phase estimation method, and details are not described herein again.
  • the methods in the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware, but in many cases the former is better Implementation.
  • the technical solution of the present disclosure can be embodied in the form of a software product in essence or part that contributes to the existing technology, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above , Magnetic disks, optical disks), including several instructions to enable a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to perform the methods described in various embodiments of the present disclosure.
  • the present disclosure achieves the technical effect of greatly reducing the complexity of the algorithm without reducing the accuracy of the phase noise compensation, which is beneficial to hardware implementation.
  • the present disclosure obtains a phase noise signal with only phase noise by performing digital signal processing on the signal under test acquired in the current symbol; rotating the phase noise signal based on each preset test angle to obtain each rotation signal, and based on The error function obtains the error value corresponding to each of the rotation signals; obtains the minimum error value among each of the error values, and determines the phase angle corresponding to the minimum error value and the two phase angles adjacent to the left and right of the phase angle Determine the optimal phase angle based on the minimum error value and the phase angle corresponding to the minimum error value and the two phase angles adjacent to the left and right of the phase angle; obtain each estimated phase angle before the current symbol, And determine the target phase angle based on the optimal phase angle and each of the estimated phase angles.
  • the error function By using the error function to calculate the corresponding error value for the obtained signal under test, compared with the traditional calculation method using a large number of multipliers, the number of test angles is reduced, and the calculation complexity of the error function is greatly reduced , And in determining the target phase angle, that is, the estimated phase noise, in addition to estimating the current optimal phase angle, it is also related to the previously obtained estimated phase angle, thereby effectively reducing the probability of the occurrence of phase cycle slips and improving the system.
  • the performance has achieved the technical effect of greatly reducing the complexity of the algorithm without reducing the accuracy of the phase noise compensation, which is conducive to hardware implementation.

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

Abstract

La présente invention concerne un procédé et un appareil d'estimation de phase de porteuse, un dispositif et un support de stockage lisible par ordinateur, le procédé consistant à: exécuter un traitement de signal numérique d'un signal à détecter acquis dans un symbole courant, obtenir un signal de bruit de phase portant uniquement un bruit de phase; sur la base de divers angles de test pré-configurés, faire tourner le signal de bruit de phase de façon à obtenir divers signaux de rotation, et sur la base d'une fonction d'erreur, acquérir des valeurs d'erreur correspondantes pour les différents signaux de rotation; acquérir une valeur d'erreur minimale parmi les diverses valeurs d'erreur, et déterminer un angle de phase correspondant à la valeur d'erreur minimale et les deux angles de phase adjacents audit angle de phase à gauche et à droite; déterminer un angle de phase optimal sur la base de la valeur d'erreur minimale, l'angle de phase correspondant à la valeur d'erreur minimale et les deux angles de phase adjacents audit angle de phase à gauche et à droite; acquérir divers angles de phase estimés avant le symbole courant, et déterminer un angle de phase cible sur la base de l'angle de phase optimal et des différents angles de phase estimés.
PCT/CN2019/127871 2018-12-25 2019-12-24 Procédé et appareil d'estimation de phase de porteuse, dispositif et support de stockage lisible par ordinateur WO2020135408A1 (fr)

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