CN110676588B - Phase-shift wave control code hardware online adjusting system - Google Patents
Phase-shift wave control code hardware online adjusting system Download PDFInfo
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- CN110676588B CN110676588B CN201910913094.4A CN201910913094A CN110676588B CN 110676588 B CN110676588 B CN 110676588B CN 201910913094 A CN201910913094 A CN 201910913094A CN 110676588 B CN110676588 B CN 110676588B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
- H01Q3/38—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters the phase-shifters being digital
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Abstract
The invention discloses a phase-shift wave control code hardware online adjusting system, and belongs to the technical field of integrated circuits. The phase-shifting wave control code hardware online adjusting system comprises a wave control code calculating module, a transfer matrix module, a bit adjusting module and a wave control code sending module; the wave control code calculation module calculates a normalized phase shift wave control code corresponding to each array element according to external input information; the transfer matrix module changes the arrangement sequence of the phase shift wave control codes; the bit adjusting module controls the phase-shifting wave control code number according to the precision; and the wave control code sending module sends the phase-shifted wave control code to the digital phase shifter in series. The phase-shifting wave control code hardware online adjusting system is flexible and configurable, and can be applied to phased array antenna systems with various different precision requirements and different phase shifter specifications.
Description
Technical Field
The invention relates to the technical field of integrated circuits, in particular to a phase-shift wave control code hardware online adjusting system.
Background
With the continuous development of signal processing technology, radar technology and computer technology, the phased array antenna array surface technology is publicly approved by the characteristics of flexibility and convenience, and the development of related technologies is also a rapid advance, so that diversity and flexibility are provided for radar scanning.
The binary digital phase shifter has simple structure and stable phase shift amount, and is an important component of the phased array antenna. The minimum phase of the binary digital phase shifter is 360 DEG/2nAnd n is the phase control bit number of the digital phase shifter. For a larger antenna array, a large number of phase shifters are included. Different antenna arrays have different specifications of phase shifters, and even the same antenna array has different application scenes, the corresponding precision requirements are different. Thus, a need for a beam control system for controlling phase shifters that is adjustable in real time is presented. Aiming at different phased array antennas, a universal wave control system which has an online adjusting function and is compatible with various phase shifter specifications is designed to become a commonly adopted solution. Compared with the conventional scheme that the digital phase shifter corresponds to the wave control system one by one, the scheme can greatly save the expenses caused by system development and debugging.
Disclosure of Invention
The invention aims to provide a phase-shifting wave control code hardware online adjusting system, which is used for realizing an online configurable function and can be applied to phased array antenna systems with various different precision requirements, different phase shifter specifications and different array element numbers.
In order to solve the above technical problem, the present invention provides an on-line adjusting system for phase-shift wave control code hardware, comprising:
the wave control code calculation module is used for calculating the normalized phase-shift wave control code corresponding to each array element according to external input information;
the transfer matrix module changes the arrangement sequence of the phase shift wave control codes;
the bit adjusting module controls the phase-shifting wave control code number according to the precision;
the wave control code sending module is used for serially sending the phase-shifted wave control code to the digital phase shifter;
the wave control code calculation module, the transfer matrix module, the bit adjusting module and the wave control code sending module are connected in sequence.
Optionally, the phase-shift wave control code hardware online adjusting system further includes a universal bus interface, which is respectively connected to the wave control code calculating module, the transfer matrix module, the bit adjusting module, and the wave control code sending module; the universal bus interface is communicated with the CPU, the CPU configures parameters including a pitch angle, an azimuth angle, frequency, an array element interval, a two-dimensional array B, precision requirements, frequency division factors, the number of single-channel wave control codes and an output format on line, and monitors the completion mark of each module.
Optionally, the wave control code calculation module adopts a hardware circuit to realize normalized calculation of the phase shift code; wherein the content of the first and second substances,
the hardware circuit is realized by adopting RTL codes and digital IP, comprises a multiplier, a divider and a ROM, and calculates phase shift codes of 1024 array elements in total, wherein the normalized phase shift code precision is 5.625 degree/bit, and the total bit is 6.
Optionally, the wave control code calculation module calculates according to the following formula:
where c is the speed of light, α is the pitch angle, β is the azimuth angle, dx、dyRespectively array element spacing in x direction and y direction on the plane, i and j are array element serial numbers, f is scanning angle frequency, i belongs to [0,31]]，j∈[0,31]。
Optionally, the transfer matrix module includes a serial-parallel conversion unit and an array reset unit;
the serial-parallel conversion unit is used for integrating 1024 phase-shift wave control codes into a two-dimensional array A, wherein elements a [ i ] [ j ] in the two-dimensional array A represent the phase-shift wave control codes of the (i, j) th array element, i belongs to [0,31], and j belongs to [0,31 ];
the array resetting unit takes an externally configured two-dimensional array B as an index of the two-dimensional array A, and the two-dimensional array A is reordered to form a two-dimensional array C; the two-dimensional array B comprises 10 bits in total, and represents the index position of the element C [ i ] [ j ] in the two-dimensional array C in the two-dimensional array a, namely C [ i ] [ j ] ═ a [ High ] [ Low ], High represents the High 5 bits of B [ i ] [ j ], and Low represents the Low 5 bits of B [ i ] [ j ].
Optionally, the bit adjusting module is configured to perform a low bit truncation operation on each phase-shifted wave control code, and is adapted to different precision requirements: 6 bits correspond to 5.625 °/bit, 5 bits to 11.25 °/bit, 4 bits to 22.5 °/bit, 3 bits to 45 °/bit.
Optionally, the wave control code sending module includes an array splitting unit and a serial sending unit;
the array splitting unit splits the two-dimensional array C into 128 REG variables in sequence, each REG variable stores 1-6 phase shift wave control codes, and the storage quantity is controlled by a related register configured by a universal bus interface and is transmitted to the serial sending unit;
the serial sending unit is internally provided with a frequency division unit which can realize even frequency division of the bus clock and is used as a sending clock; the 128 REG variables are respectively output 1-6 phase shift wave control codes in series from 128 channels according to MSB/LSB format, and are received and converted by digital phase shifters of corresponding types.
The invention provides a phase-shifting wave control code hardware online adjusting system, which comprises a wave control code calculating module, a transfer matrix module, a bit adjusting module and a wave control code sending module, wherein the wave control code calculating module is used for calculating a phase-shifting matrix; the wave control code calculation module calculates a normalized phase shift wave control code corresponding to each array element according to external input information; the transfer matrix module changes the arrangement sequence of the phase shift wave control codes; the bit adjusting module controls the phase-shifting wave control code number according to the precision; and the wave control code sending module sends the phase-shifted wave control code to the digital phase shifter in series. The phase-shifting wave control code hardware online adjusting system is flexible and configurable, and can be applied to phased array antenna systems with various different precision requirements and different phase shifter specifications.
The invention has the following beneficial effects:
(1) the hardware circuit adopts RTL codes and digital IP to realize the calculation of phase shift wave control codes, and the speed is high;
(2) through parameter configuration, the random sending sequence of the phase-shifted wave control codes on 128 channels can be realized, 1-6 wave control codes are sent in a single path, 3-6 bits are selected at random precision, the MSB/LSB sending format is adopted, and the sending frequency can be selected so as to adapt to the requirements of digital phase shifters of different models;
(3) the device is communicated with a CPU through a general bus interface, parameters can be configured on line, and the adjusting process is controlled in a software and hardware cooperation mode.
Drawings
FIG. 1 is a schematic structural diagram of a phase-shift wave control code hardware online adjusting system provided by the invention;
FIG. 2 is a schematic flow chart of an adjusting method of the phase-shift wave control code hardware online adjusting system provided by the invention.
Detailed Description
The present invention provides a hardware on-line adjustment system for phase-shift wave control codes, which is further described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Example one
The invention provides a phase-shifting wave control code hardware online adjusting system, which has a structure shown in figure 1 and comprises a wave control code calculating module, a transfer matrix module, a bit adjusting module and a wave control code sending module which are sequentially connected. Specifically, the wave control code calculation module calculates a normalized phase shift wave control code corresponding to each array element according to external input information; the transfer matrix module changes the arrangement sequence of the phase shift wave control codes; the bit adjusting module controls the phase-shifting wave control code number according to the precision; and the wave control code sending module sends the phase-shifted wave control code to the digital phase shifter in series. Furthermore, the phase-shifting wave control code hardware online adjusting system also comprises a universal bus interface, wherein the wave control code calculating module, the transfer matrix module, the bit adjusting module and the wave control code sending module are all connected with the universal bus interface, the universal bus interface is communicated with the CPU, the CPU configures parameters online and monitors the completion marks of all modules.
The adjusting method of the phase-shift wave control code hardware online adjusting system comprises the following steps:
step S21, the wave control code calculation module calculates the normalization phase shift wave control code corresponding to each array element according to the external input information;
step S22, the transfer matrix module changes the arrangement sequence of the phase shift wave control codes;
s23, the bit adjusting module controls the phase-shifting wave control code number according to the precision;
step S24, the wave control code sending module sends the phase-shifted wave control code to the digital phase shifter in series;
step S25, the CPU determines whether the transmission is completed by the flag inquiry method.
Specifically, the wave control code calculation module adopts a hardware circuit to realize normalized calculation of the phase shift code; the hardware circuit comprises a multiplier, a divider and a ROM, and is realized by adopting an RTL code and a digital IP, the digital IP is obtained after synthesis, phase shift wave control codes of 1024 array elements are calculated in total, and the normalized phase shift code precision is 5.625 degrees/bit and is 6 bits in total. CPU configures the wave control code calculation module through the general bus interfaceExternal input information such as elevation angle, azimuth angle, frequency, array element spacing and the like is input through a formula
Calculating the normalized phase shift wave control code corresponding to each array element, wherein c is the light speed, alpha is the pitch angle, beta azimuth angle and dx、dyRespectively array element spacing in x direction and y direction on the plane, i and j are array element serial numbers, f is scanning angle frequency, i belongs to [0,31]]，j∈[0,31]。
The transfer matrix module comprises a serial-parallel conversion unit and a group reset unit, wherein the serial-parallel conversion unit is used for integrating 1024 phase-shift wave control codes into a two-dimensional array A, elements a [ i ] [ j ] in the two-dimensional array A represent the phase-shift wave control codes of the (i, j) th array element, wherein i belongs to [0,31], and j belongs to [0,31 ]; the CPU configures parameters of a two-dimensional array B to the transfer matrix module through the general bus interface, and the array resetting unit takes the two-dimensional array B as an index of the two-dimensional array A and reorders the two-dimensional array A to form a two-dimensional array C; and the element B [ i ] [ j ] in the two-dimensional array B has 10 bits in total, and represents the index position of the element C [ i ] [ j ] in the two-dimensional array C in the two-dimensional array A, namely C [ i ] [ j ] ═ a [ High ] [ Low ], High represents the High 5 bits of B [ i ] [ j ], and Low represents the Low 5 bits of B [ i ] [ j ].
According to the precision requirement of the universal bus interface configuration, the bit adjusting module performs low bit interception operation on each phase-shifting wave control code: 6 bits correspond to 5.625 °/bit, 5 bits to 11.25 °/bit, 4 bits to 22.5 °/bit, 3 bits to 45 °/bit.
Specifically, the wave control code sending module comprises an array splitting unit and a serial sending unit; the array splitting unit splits the two-dimensional array C into 128 REG variables in sequence, each REG variable stores 1-6 phase-shift wave control codes and transmits the codes to the serial sending unit, and the storage quantity of the phase-shift wave control codes (namely the number of single-channel wave control codes) is parameterized and can be controlled by a related register configured by a general bus interface; the serial sending unit is internally provided with a frequency division unit which can realize even frequency division of the bus clock and is used as a sending clock, and a frequency division factor is parameterized and can be controlled by a general bus interface configuration register; the 128 REG variables are sent from 128 channels (i.e. channel 0-channel 127) to digital phase shifter 0-digital phase shifter 127, and according to MSB/LSB format (output format can be changed by general bus interface configuration related register), 1-6 phase shift wave control codes are output in serial, and are received by the digital phase shifter of corresponding model and then converted.
In addition, the CPU carries out mark inquiry through the universal bus interface to judge whether the transmission is completed.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (5)
1. The utility model provides a phase shift wave accuse sign indicating number hardware is governing system on line which characterized in that includes:
the wave control code calculation module is used for calculating the normalized phase-shift wave control code corresponding to each array element according to external input information;
the transfer matrix module changes the arrangement sequence of the phase shift wave control codes;
the bit adjusting module controls the phase-shifting wave control code number according to the precision;
the wave control code sending module is used for serially sending the phase-shifted wave control code to the digital phase shifter;
the wave control code calculation module, the transfer matrix module, the bit adjusting module and the wave control code sending module are sequentially connected;
the wave control code calculation module adopts a hardware circuit to realize the normalized calculation of the phase shift code; wherein the content of the first and second substances,
the hardware circuit is realized by adopting RTL codes and digital IP, comprises a multiplier, a divider and a ROM, and calculates phase shift codes of 1024 array elements in total, wherein the normalized phase shift code precision is 5.625 degree/bit, and the total bit is 6.
2. The phase-shifting wave control code hardware online adjusting system according to claim 1, further comprising a general bus interface respectively connected to the wave control code calculating module, the transfer matrix module, the bit adjusting module and the wave control code transmitting module; the universal bus interface is communicated with the CPU, the CPU configures parameters including a pitch angle, an azimuth angle, frequency, an array element interval, a two-dimensional array B, precision requirements, frequency division factors, the number of single-channel wave control codes and an output format on line, and monitors the completion mark of each module;
the transfer matrix module comprises a serial-parallel conversion unit and an array resetting unit;
the serial-parallel conversion unit is used for integrating 1024 phase-shift wave control codes into a two-dimensional array A, wherein elements a [ i ] [ j ] in the two-dimensional array A represent the phase-shift wave control codes of the (i, j) th array element, i belongs to [0,31], and j belongs to [0,31 ];
the array resetting unit takes the online configured two-dimensional array B as an index of the two-dimensional array A, and the two-dimensional array A is reordered to form a two-dimensional array C; the two-dimensional array B comprises 10 bits in total, and represents the index position of the element C [ i ] [ j ] in the two-dimensional array C in the two-dimensional array a, namely C [ i ] [ j ] ═ a [ High ] [ Low ], High represents the High 5 bits of B [ i ] [ j ], and Low represents the Low 5 bits of B [ i ] [ j ].
3. The phase-shifting wave control code hardware online adjusting system according to claim 1, wherein the wave control code calculating module calculates by the following formula:
where c is the speed of light, α is the pitch angle, β is the azimuth angle, dx、dyRespectively array element spacing in x direction and y direction on the plane, i and j are array element serial numbers, f is scanning angle frequency, i belongs to [0,31]]，j∈[0,31]。
4. The phase-shifting wave-control code hardware online adjusting system of claim 1, wherein the bit adjusting module is used for performing low-order interception operation on each phase-shifting wave-control code, and is adapted to different precision requirements: 6 bits correspond to 5.625 °/bit, 5 bits to 11.25 °/bit, 4 bits to 22.5 °/bit, 3 bits to 45 °/bit.
5. The phase-shifting wave control code hardware online adjusting system according to claim 2, wherein the wave control code sending module comprises an array splitting unit and a serial sending unit;
the array splitting unit splits the two-dimensional array C into 128 REG variables in sequence, each REG variable stores 1-6 phase shift wave control codes, and the storage quantity is controlled by a related register configured by a universal bus interface and is transmitted to the serial sending unit;
the serial sending unit is internally provided with a frequency division unit which can realize even frequency division of the bus clock and is used as a sending clock; the 128 REG variables are respectively output 1-6 phase shift wave control codes in series from 128 channels according to MSB/LSB format, and are received and converted by digital phase shifters of corresponding types.
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