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CN114137474A - Rotation method and device suitable for broadband direction finding receiver - Google Patents

Rotation method and device suitable for broadband direction finding receiver Download PDF

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Publication number
CN114137474A
CN114137474A CN202111437989.9A CN202111437989A CN114137474A CN 114137474 A CN114137474 A CN 114137474A CN 202111437989 A CN202111437989 A CN 202111437989A CN 114137474 A CN114137474 A CN 114137474A
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digital signal
unit vector
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signal data
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董悦
秦进杰
赵保磊
刘彧涵
刘博�
李鑫儒
蒋航
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Tianjin Optical Electrical Communication Technology Co Ltd
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Tianjin Optical Electrical Communication Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04—Details
    • G01S3/043—Receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction

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  • Complex Calculations (AREA)

Abstract

The invention provides a rotating method and a device suitable for a broadband direction finding receiver, wherein the method comprises the following steps: setting at least two channels to receive digital signal data; respectively carrying out down-conversion processing on the digital signal data of each channel; performing N on the digital signal data after the down-conversion processingfftPerforming point Fourier transform to respectively obtain a plurality of data sets of each channel; obtaining a complex conjugate from a Fourier transform of any channel; and rotating the complex data sets of the at least two channels by using the complex conjugate so as to determine the phase difference between other channels and any one channel. High-speed data can be averaged, so that the throughput rate of the data is reduced, and the phase difference of the signal of each channel relative to the signal of the first channel can be conveniently calculated.

Description

Rotation method and device suitable for broadband direction finding receiver
Technical Field
The invention belongs to the technical field of signal processing, and particularly relates to a rotating method and a rotating device suitable for a broadband direction finding receiver.
Background
The broadband direction-finding receiver has wide application in the field of reconnaissance. The broadband direction finding receiver needs to convert multi-channel signals received by a plurality of direction finding antennas into parallel data, and then performs interferometer direction finding by calculating and comparing phase differences of all channel signals relative to a first channel signal. The traditional measuring camera adopts software to carry out a rotation smoothing algorithm to realize the capture of the phase difference, but the data throughput of the broadband direction finder is high, and higher computing resources are needed for computing the rotation smoothing, so that the research and development of the broadband direction finder are greatly difficult.
Disclosure of Invention
In view of the above, the present invention is directed to a rotation method and apparatus for a wideband direction finding receiver, so as to solve the technical problem of real-time direction finding requirement for wideband data.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in one aspect, an embodiment of the present invention provides a rotation method suitable for a wideband direction finding receiver, including:
setting at least two channels to receive digital signal data;
respectively carrying out down-conversion processing on the digital signal data of each channel;
performing N on the digital signal data after the down-conversion processingfftPerforming point Fourier transform to respectively obtain a plurality of data sets of each channel;
obtaining a complex conjugate from a Fourier transform of any channel;
and rotating the complex data sets of the at least two channels by using the complex conjugate so as to determine the phase difference of the other channels and any one channel.
Further, the method further comprises:
and respectively averaging the real part and the imaginary part of the digital signal data received by the at least two channels to realize the smoothing of the digital signal data.
Further, the obtaining the complex conjugate from the fourier transform of any channel includes:
the conjugate transpose is computed as the complex conjugate using the unit vector.
Further, the method further comprises:
a unit vector is calculated, and the unit vector,
the calculating the unit vector includes:
a is to be11The real part and the imaginary part of the complex number are respectively input into a CORDIC IP core, and the complex number A is directly calculated11The phase angle of (d);
and inputting the phase angle as input into another CORDIC IP core to calculate the corresponding sine sin alpha and cosine cos alpha under the phase angle, and obtaining a unit vector E which is cos alpha + i multiplied by sin alpha.
Further, the calculating the conjugate transpose using the unit vector includes:
to obtain A11Unit vector of (E)11＝Xout+i×YoutThen the conjugate of the unit vector is set to
Figure BDA0003382015430000021
On the other hand, an embodiment of the present invention further provides a rotating apparatus suitable for a wideband direction finding receiver, including:
the receiving module is used for setting at least two channels to receive digital signal data;
the processing module is used for respectively carrying out down-conversion processing on the digital signal data of each channel;
a conversion module for performing N on the digital signal data after down-conversion processingfftPerforming point Fourier transform to respectively obtain a plurality of data sets of each channel;
the acquisition module is used for acquiring complex conjugate from Fourier transform of any channel;
and the rotation module is used for rotating the complex data sets of the at least two channels by using complex conjugate so as to determine the phase difference between other channels and any one channel.
Further, the apparatus further comprises: and the averaging module is used for respectively averaging the real part and the imaginary part of the digital signal data received by the at least two channels to realize the smoothing of the digital signal data.
Further, the obtaining module includes:
a calculation unit for calculating a conjugate transpose as a complex conjugate using the unit vector.
Further, the obtaining module further includes:
a unit vector calculation unit for calculating a unit vector;
the unit vector calculation unit is configured to:
a is to be11The real part and the imaginary part of the complex number are respectively input into a CORDIC IP core, and the complex number A is directly calculated11The phase angle of (d);
and inputting the phase angle as input into another CORDIC IP core to calculate the corresponding sine sin alpha and cosine cos alpha under the phase angle, and obtaining a unit vector E which is cos alpha + i multiplied by sin alpha.
Further, the calculation unit is configured to:
to obtain A11Unit vector of (E)11＝Xout+i×YoutThen the conjugate of the unit vector is set to
Figure BDA0003382015430000031
Compared with the prior art, the rotating method and the rotating device which are suitable for the broadband direction finding receiver have the following advantages that: the invention relates to a rotating method and a device suitable for a broadband direction finding receiver, which receive digital signal data by arranging at least two channels; respectively carrying out down-conversion processing on the digital signal data of each channel; performing N on the digital signal data after the down-conversion processingfftPerforming point Fourier transform to respectively obtain a plurality of data sets of each channel; obtaining a complex conjugate from a Fourier transform of any channel; rotating the complex data sets of the at least two channels using complex conjugates to determine other channelsThe track is out of phase with either of the channels. High-speed data can be averaged, so that the throughput rate of the data is reduced, and the phase difference of the signal of each channel relative to the signal of the first channel can be conveniently calculated. Compared with the traditional software implementation mode, the FPGA-based implementation method has the advantages of high calculation speed, real-time processing, low requirement on storage space and the like.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flowchart of a rotation method suitable for a wideband direction finding receiver according to a first embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an operation flow of rotation smoothing in a rotation method for a wideband direction finding receiver according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of an interface of a phase difference calculation module in a rotation method for a wideband direction finding receiver according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of an interface of a unit vector calculation module in the rotation method for a wideband direction finding receiver according to the first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a rotating device suitable for a broadband direction finding receiver according to a second embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
Fig. 1 is a schematic flowchart of a rotation method suitable for a wideband direction finding receiver according to a first embodiment of the present invention; fig. 2 is a schematic diagram of an operation flow of rotation smoothing in the rotation method for a wideband direction finding receiver according to the first embodiment of the present invention, where the method is applied to a rotation smoothing algorithm using an FPGA pipeline structure, and the rotation smoothing algorithm may average high-speed data, so as to reduce the throughput of the data. And further fully meets the real-time direction-finding requirement of broadband data.
Referring to fig. 1 and 2, the rotation method for the wideband direction finding receiver includes:
and S110, setting at least two channels to receive digital signal data.
Referring to fig. 2, in the present embodiment, N channels are provided in total, and each channel can independently receive digital signal data.
And S120, respectively carrying out down-conversion processing on the digital signal data of each channel.
In a communication system, in order to easily transmit signals and realize channel multiplexing, the frequency of transmitted signals is high, and thus frequency conversion of signals is an important matter of research of the communication system. Depending on the situation before and after the frequency conversion, down-conversion (frequency reduction) and up-conversion (frequency increase) can be divided. Down conversion is performed in the receiver. The down-conversion method is to multiply the received signal with a local oscillator signal generated by a local oscillator, and then obtain the frequency-converted signal through a low-pass filter. The two multiplied signals can be divided into real and complex mixing by real or complex representation. Thus, data for each channel can be digitally down-converted (DDC) separately.
S130, N is carried out on the digital signal data after the down-conversion treatmentfftAnd performing point Fourier transform to respectively obtain a complex data set of each channel.
Illustratively, the processing may be performed by:
channel 1 is made NfftPoint FFT to obtain data A11，A12And
Figure BDA0003382015430000071
wherein A is1i(i＝1，2，…，Nfft) Represents a complex number, consisting of a real part and an imaginary part.
Channel 2 is made of NfftPoint FFT to obtain data A21，A22And
Figure BDA0003382015430000072
wherein A is2i(i＝1，2，…，Nfft) Represents a complex number, consisting of a real part and an imaginary part.
Channel 3 to channel N are likewise made NfftPoint FFT to obtain data A31，A32And
Figure BDA0003382015430000073
AN1，AN2and
Figure BDA0003382015430000074
and S140, acquiring the complex conjugate from the Fourier transform of any channel.
Exemplary, may include: the conjugate transpose is computed as the complex conjugate using the unit vector. Accordingly, the method may further comprise the steps of: a unit vector is calculated. The calculating the unit vector includes: a is to be11The real part and the imaginary part of the complex number are respectively input into a CORDIC IP core, and the complex number A is directly calculated11The phase angle of (d); and inputting the phase angle as input into another CORDIC IP core to calculate the corresponding sine sin alpha and cosine cos alpha under the phase angle, and obtaining a unit vector E which is cos alpha + i multiplied by sin alpha. Fig. 3 is a schematic diagram of an interface of a phase difference calculation module in a rotation method for a wideband direction finding receiver according to a first embodiment of the present invention; fig. 4 is a schematic diagram of an interface of a unit vector calculation module in the rotation method for a wideband direction finding receiver according to the first embodiment of the present invention; see fig. 3 and 4, E11Is represented by A11Is expressed as A11/|A11|。
Figure BDA0003382015430000075
Represents E11The conjugate transpose of (c). The unit vector is calculated as follows: is provided with A11Has a real part of XinImaginary part of YinAt this time, X may be substitutedinAnd YinRespectively input into CORDIC IP core to directly calculate complex number A11I.e. α ═ arctan (X)in/Yin) I.e., PHASE _ OUT in fig. 3.
The definitions of the interfaces of CORDICIP (arctan) are as follows:
Signal Range Description
X_IN -1＜＝X_IN＜＝1 Input X Coordinate
Y_IN -1＜＝Y_IN＜＝1 lnput Y Coordinate
PHASE_OUT -Pi＜＝PHASE_OUT＜＝Pi Output Angle
then, a CORDIC IP kernel is used to directly use the phase angle calculated in the previous step as input, calculate the sine sin α and cosine cos α corresponding to the phase angle, and obtain a unit vector E ═ cos α + i × sin α, that is, X in fig. 4out(cos α) and Yout(sin α). The respective interface definitions of CORDICIP (cos/sin) are explained as follows:
Signal Range Description
PHASE_IN -Pi＜＝PHASE_IN＜＝Pi Input Angleθ
X_OUT -1＜＝X_OUT＜＝1 Output Cos(θ)
Y_OUT -1＜＝Y_OUT＜＝1 Output Sin(θ)
can obtain A11Unit vector of (E)11＝Xout+i×YoutThen the conjugate of the unit vector is set to
Figure BDA0003382015430000081
Since the unit vector is directly obtained, the method does not need division and root extraction operation. And the method is suitable for pipeline operation.
S150, the complex data sets of the at least two channels are rotated by using complex conjugates, and further the phase difference between other channels and any one channel is determined.
Illustratively, the calculation of the rotation channel 1 may be started in the following manner:
Figure BDA0003382015430000082
Figure BDA0003382015430000083
to retrieve an NfftData of the points; and (3) a channel 2:
Figure BDA0003382015430000084
Figure BDA0003382015430000085
to retrieve an NfftData of the points; and (3) repeating the step (2) from the channel 3 to the channel N to obtain the calculated values of the respective channels. The phase shift can be determined by rotation calculationAnd determining the phase difference of the other channel and the any channel.
The embodiment receives digital signal data by setting at least two channels; respectively carrying out down-conversion processing on the digital signal data of each channel; performing N on the digital signal data after the down-conversion processingfftPerforming point Fourier transform to respectively obtain a plurality of data sets of each channel; obtaining a complex conjugate from a Fourier transform of any channel; and rotating the complex data sets of the at least two channels by using the complex conjugate so as to determine the phase difference between other channels and any one channel. High-speed data can be averaged, so that the throughput rate of the data is reduced, and the phase difference of the signal of each channel relative to the signal of the first channel can be conveniently calculated. Compared with the traditional software implementation mode, the FPGA-based implementation method has the advantages of high calculation speed, real-time processing, low requirement on storage space and the like.
In a preferred implementation of this embodiment, the method may further include the steps of: and respectively averaging the real part and the imaginary part of the digital signal data received by the at least two channels to realize the smoothing of the digital signal data. Illustratively, channel 1 averages the data N consecutive times (the output is still a complex number, including real and imaginary parts); channel 2 averages the data N consecutive times (the output is still a complex number, including real and imaginary parts); and c, repeating the step b) from the channel 3 to the channel N to obtain the average value output of the channels 2 to N. After smoothing, the noise amplitude becomes low and the signal amplitude is unchanged. Therefore, the phase difference between each channel and the channel 1 can be conveniently calculated for the rotation smoothing algorithm, and the signal-to-noise ratio of the direction finding receiver can be further improved.
Example two
Fig. 5 is a schematic structural diagram of a rotating apparatus suitable for a wideband direction finding receiver according to a second embodiment of the present invention, and referring to fig. 2, the rotating apparatus suitable for a wideband direction finding receiver includes:
a receiving module 210, configured to set at least two channels to receive digital signal data;
a processing module 220, configured to perform down-conversion processing on the digital signal data of each channel respectively;
a transformation module 230 for performing N on the digital signal data after the down-conversion processingfftPerforming point Fourier transform to respectively obtain a plurality of data sets of each channel;
an obtaining module 240, configured to obtain a complex conjugate from a fourier transform of any channel;
a rotation module 250, configured to rotate the complex data set of the at least two channels by using the complex conjugate, so as to determine a phase difference between the other channels and the any channel.
The embodiment of the invention provides a rotating device suitable for a broadband direction finding receiver, which receives digital signal data by arranging at least two channels; respectively carrying out down-conversion processing on the digital signal data of each channel; performing N on the digital signal data after the down-conversion processingfftPerforming point Fourier transform to respectively obtain a plurality of data sets of each channel; obtaining a complex conjugate from a Fourier transform of any channel; and rotating the complex data sets of the at least two channels by using the complex conjugate so as to determine the phase difference between other channels and any one channel. High-speed data can be averaged, so that the throughput rate of the data is reduced, and the phase difference of the signal of each channel relative to the signal of the first channel can be conveniently calculated. Compared with the traditional software implementation mode, the FPGA-based implementation method has the advantages of high calculation speed, real-time processing, low requirement on storage space and the like.
Further, the apparatus further comprises: and the averaging module is used for respectively averaging the real part and the imaginary part of the digital signal data received by the at least two channels to realize the smoothing of the digital signal data.
On the basis of the above embodiment, the obtaining module includes:
a calculation unit for calculating a conjugate transpose as a complex conjugate using the unit vector.
On the basis of the above embodiment, the obtaining module further includes:
a unit vector calculation unit for calculating a unit vector;
the unit vector calculation unit is configured to:
a is to be11The real part and the imaginary part of the complex number are respectively input into a CORDIC IP core, and the complex number A is directly calculated11The phase angle of (d);
and inputting the phase angle as input into another CORDIC IP core to calculate the corresponding sine sin alpha and cosine cos alpha under the phase angle, and obtaining a unit vector E which is cos alpha + i multiplied by sin alpha.
On the basis of the above embodiment, the calculation unit is configured to:
to obtain A11Unit vector of (E)11＝Xout+i×YoutThen the conjugate of the unit vector is set to
Figure BDA0003382015430000111
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1.一种适用于宽带测向接收机的旋转方法，其特征在于，包括：1. a rotation method applicable to a wideband direction finding receiver, is characterized in that, comprising: 设置至少两个通道接收数字信号数据；Set at least two channels to receive digital signal data; 分别对每个通道的数字信号数据进行下变频处理；Perform down-conversion processing on the digital signal data of each channel respectively; 对下变频处理后的数字信号数据进行Nfft点傅里叶变换，分别得到每个通道的复数数据集合；Perform N fft point Fourier transform on the down-converted digital signal data to obtain the complex data set of each channel; 从任一通道的傅里叶变换中获取复共轭；Obtain the complex conjugate from the Fourier transform of either channel; 利用复共轭对所述至少两个通道的复数数据集合进行旋转,，进而确定其它通道与所述任一通道的相位差。The complex data sets of the at least two channels are rotated by using the complex conjugate, so as to determine the phase difference between the other channel and any one of the channels. 2.根据权利要求1所述的方法，其特征在于，所述方法还包括：2. The method according to claim 1, wherein the method further comprises: 对所述至少两个通道接收的数字信号数据的实部和虚部分别进行平均，实现数字信号数据的平滑。The real part and the imaginary part of the digital signal data received by the at least two channels are respectively averaged to realize smoothing of the digital signal data. 3.根据权利要求1所述的方法，其特征在于，所述从任一通道的傅里叶变换中获取复共轭，包括：3. The method according to claim 1, wherein the obtaining the complex conjugate from the Fourier transform of any channel comprises: 利用单位向量计算共轭转置，作为复共轭。Calculate the conjugate transpose using the unit vector, as the complex conjugate. 4.根据权利要求3所述的方法，其特征在于，所述方法还包括：4. The method according to claim 3, wherein the method further comprises: 计算单位向量，compute the unit vector, 所述计算单位向量包括：The computational unit vector includes: 将A11的实部和虚部分别输入到CORDIC IP核中，直接计算出复数A11的相位角；Input the real part and imaginary part of A 11 into the CORDIC IP core respectively, and directly calculate the phase angle of the complex number A 11 ; 将所述相位角作为输入，输入到另一个CORDIC IP核计算出该相位角下对应的正弦sinα和余弦cosα，得到单位向量E＝cosα+i×sinα。The phase angle is used as input to another CORDIC IP core to calculate the corresponding sine sinα and cosine cosα under the phase angle, and the unit vector E=cosα+i×sinα is obtained. 5.根据权利要求4所述的方法，其特征在于，所述利用单位向量计算共轭转置，包括：5. The method according to claim 4, wherein the calculating the conjugate transpose using the unit vector comprises: 得到A11的单位向量，E11＝Xout+i×Yout，则该单位向量的共轭转置为
Figure FDA0003382015420000021
The unit vector of A 11 is obtained, E 11 =X out +i×Y out , then the conjugate transpose of the unit vector is
Figure FDA0003382015420000021
 6.一种适用于宽带测向接收机的旋转装置，其特征在于，包括：6. A rotating device suitable for a wideband direction finding receiver, characterized in that, comprising: 接收模块，用于设置至少两个通道接收数字信号数据；A receiving module, used to set at least two channels to receive digital signal data; 处理模块，用于分别对每个通道的数字信号数据进行下变频处理；The processing module is used to down-convert the digital signal data of each channel respectively; 变换模块，用于对下变频处理后的数字信号数据进行Nfft点傅里叶变换，分别得到每个通道的复数数据集合；The transformation module is used to perform N fft point Fourier transform on the digital signal data after down-conversion processing, and obtain the complex data set of each channel respectively; 获取模块，用于从任一通道的傅里叶变换中获取复共轭；an acquisition module for acquiring the complex conjugate from the Fourier transform of any channel; 旋转模块，用于利用复共轭对所述至少两个通道的复数数据集合进行旋转,进而确定其它通道与所述任一通道的相位差。The rotation module is configured to rotate the complex data sets of the at least two channels by using the complex conjugate, so as to determine the phase difference between the other channel and any one of the channels. 7.根据权利要求6所述的装置，其特征在于，所述装置还包括：7. The apparatus of claim 6, wherein the apparatus further comprises: 平均模块，用于对所述至少两个通道接收的数字信号数据的实部和虚部分别进行平均，实现数字信号数据的平滑。The averaging module is used for averaging the real part and the imaginary part of the digital signal data received by the at least two channels, so as to realize smoothing of the digital signal data. 8.根据权利要求6所述的装置，其特征在于，所述获取模块，包括：8. The apparatus according to claim 6, wherein the acquisition module comprises: 计算单元，用于利用单位向量计算共轭转置，作为复共轭。Computational unit for computing the conjugate transpose with the unit vector, as a complex conjugate. 9.根据权利要求8所述的装置，其特征在于，所述获取模块，还包括：9. The apparatus according to claim 8, wherein the acquiring module further comprises: 单位向量计算单元，用于计算单位向量；unit vector calculation unit for calculating unit vectors; 所述单位向量计算单元用于：The unit vector calculation unit is used for: 将A11的实部和虚部分别输入到CORDIC IP核中，直接计算出复数A11的相位角；Input the real part and imaginary part of A 11 into the CORDIC IP core respectively, and directly calculate the phase angle of the complex number A 11 ; 将所述相位角作为输入，输入到另一个CORDIC IP核计算出该相位角下对应的正弦sinα和余弦cosα，得到单位向量E＝cosα+i×sinα。The phase angle is used as input to another CORDIC IP core to calculate the corresponding sine sinα and cosine cosα under the phase angle, and the unit vector E=cosα+i×sinα is obtained. 10.根据权利要求9所述的装置，其特征在于，所述计算单元用于：10. The apparatus according to claim 9, wherein the computing unit is used for: 得到A11的单位向量，E11＝Xout+i×Yout，则该单位向量的共轭转置为
Figure FDA0003382015420000031
The unit vector of A 11 is obtained, E 11 =X out +i×Y out , then the conjugate transpose of the unit vector is
Figure FDA0003382015420000031
CN202111437989.9A 2021-11-30 2021-11-30 Rotation method and device suitable for broadband direction finding receiver Pending CN114137474A (en)

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