A kind of Ka band is supported and ground multi-beam phased array link independent scheduling device

Abstract

The application discloses a kind of Ka band's satellite-ground multi-beam phased array link independent scheduling device, it is related to satellite communication signal processing field.The application includes service signal processing module, beam control processing module, antenna radio frequency network module, signal amplification and antenna array module, time processing module;Service signal processing module independently completes each beam service signal processing and beam angle calculation;Beam control processing module completes each beam angle resolution decomposition, and according to the working clock and second impulse of time processing module, generates timing Load signal;Antenna radio frequency network module completes the amplification of signal, power division / synthesis network, the amplitude weighting and phase configuration of each internal channel component are configured;Signal amplification and antenna array module completes the driving stage amplification of radio frequency signal, wireless signal transceiver.The application supports the independent pointing scheduling of each beam of Ka band satellite-ground multi-beam phased array link, satisfies different coverage area or different user communication demand.

Description

Technical Field

[0001] This invention relates to the field of satellite communication signal processing, and in particular to an independent scheduling device for satellite-to-ground multi-beam phased array links supporting the Ka band. Background Technology

[0002] In recent years, with the development of low-Earth orbit (LEO) satellite internet, the independent scheduling of each beam in LEO satellite-to-ground agile communication has become a research hotspot in the field of satellite communication, in order to adapt to the communication system requirements of different users and regions. Currently, if traditional satellite-to-ground phased array communication links support different communication system requirements, multiple load signals will be transmitted to the phased array antenna beam position control unit. The timing difference between multiple load signals is inevitable, causing execution time chaos. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and propose an independent scheduling device for a satellite-ground multi-beam phased array link supporting the Ka band. This invention is simple to implement, decouples the inter-beam service signal processing, pointing angle calculation and antenna pointing control functions, and can flexibly and independently configure the scheduling cycle of each beam, adapting to various satellite platforms and application scenarios with different communication technology systems in different regions.

[0004] The technical solution adopted in this invention is as follows:

[0005] A satellite-to-ground multi-beam phased array link independent scheduling device supporting Ka band includes a service signal processing module 1, a beam control processing module 2, an antenna RF network module 3, a signal amplification and antenna array module 4, and a time processing module 5.

[0006] The service signal processing module 1 is used to complete the modulation and demodulation processing of multiple signals, up-conversion and down-conversion of signals, and to parse the pointing angle information of each beam according to the mission planning, working mode, satellite position, and target position information, and configure and send it to the beam control processing module 2; the pointing angle information includes azimuth angle and off-axis angle;

[0007] The beam control processing module 2 completes the calculation and decomposition of the azimuth angle and off-axis angle of each beam to obtain the amplitude weighting and phase value of each internal channel component, and generates a timing load signal based on the working clock and second pulse output by the time processing module 5, with a timing period of 125us.

[0008] The antenna RF network module 3 configures the amplitude weighting and phase configuration of each channel according to the decomposition results sent by the beam control processing module 2, and completes the execution according to the Load signal, with an execution time of less than 100ns;

[0009] Signal amplification and antenna array module 4 completes signal drive stage amplification and wireless signal transmission and reception;

[0010] The time processing module 5 generates a 100MHz working clock signal and a second pulse signal, which are distributed to the service signal processing module 1 and the beam control processing module 2 to ensure that the service signals and the pointing times of each beam are highly accurate.

[0011] Furthermore, the service signal processing module 1, beam control processing module 2, and antenna RF network module 3 adopt a modular architecture splicing method. The operation and control parameters, working modes, and independent beam pointing of each beam link support independent control. The scheduling start time of each beam is agreed to be the falling edge of the second pulse, and the scheduling period is N*125us. The value of N can be different for each beam, and N is a positive integer.

[0012] Beam control processing module 2 receives multiple LVDS angle information from service signal processing module 1. The service signal processing module 1 transmits LVDS angle information at a time uniformly defined as: falling edge of the second pulse + N*125 + 10us. Beam control processing module 2 resolves the information at a time uniformly defined as: falling edge of PPS + N*125 + 20us, and the LOAD time is uniformly defined as: falling edge of PPS + N*125 + 125us. The LOAD time is resolved by beam control processing module 2 and output to antenna RF network module 3.

[0013] According to the mission planning requirements, the service signal processing module 1 loads the software version program and completes the signal processing and frequency conversion of each beam, calculating the actual pointing angle information of each service beam. The service signal processing module 1 sends the RF analog signal to the antenna RF network module 3 through the SMA interface, and sends the angle information of each service beam to the beam control processing module 2 through the LVDS interface. The beam control processing module 2 completes the resolution of the angle information, and configures the amplitude weighting value and phase value of each internal component in parallel through the SPI bus. The antenna RF network module 3 amplifies the RF signal and completes the pointing of each beam according to the component amplitude and phase value information sent by the beam control processing module 2.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The pointing angle of the multiple beams in this invention is uncoupled, and the dwell period of each beam is a different or the same integer multiple of 125us.

[0016] 2. The beam scheduling start time of this invention adopts a unified PPS time edge and 100MHz, which can ensure that the service time slots are completely consistent and can realize the joint scheduling of multiple beams.

[0017] 3. By unifying the PPS signal and using a 100MHz working clock, the beam control processing module generates a fixed resolution time and load signal, which ensures high-precision alignment between signal processing and beam pointing time, while enabling flexible configuration of the scheduling cycle of each beam to a certain extent. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the application scenario of the present invention.

[0019] Figure 2 This is a schematic diagram of the principle of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figure 1 and Figure 2 A satellite-to-ground multi-beam phased array link independent scheduling device supporting Ka-band includes a service signal processing module 1, a beam control processing module 2, an antenna RF network module 3, a signal amplification and antenna array module 4, and a time processing module 5. Figure 1 This is the connection line in an embodiment of the present invention.

[0022] The service signal processing module 1 is used to complete the modulation and demodulation processing of multiple signals, up-conversion and down-conversion of signals, and to parse the pointing angle information of each beam according to the mission planning, working mode, satellite position, and target position information, and to configure the transmission beam control processing module 2; the pointing angle information includes azimuth angle and off-axis angle;

[0023] The beam control processing module 2 completes the calculation and decomposition of the azimuth angle and off-axis angle of each beam to obtain the amplitude weighting and phase value of each internal channel component, and generates a timing load signal based on the working clock and second pulse output by the time processing module 5, with a timing period of 125us.

[0024] The antenna RF network 3 configures the amplitude weighting and phase configuration of each channel according to the decomposition results sent by the beam control processing module 2, and completes the execution according to the Load signal, with an execution time of less than 100ns;

[0025] Signal amplification and antenna array module 4 completes signal drive stage amplification and wireless signal transmission and reception;

[0026] The time processing module 5 generates a 100MHz working clock signal and a second pulse signal, which are distributed to the service signal processing module 1 and the beam control processing module 2 to ensure that the service signals and the pointing times of each beam are highly accurate.

[0027] The service signal processing module 1, beam control processing module 2, and antenna RF network module 3 adopt a modular architecture splicing method. The operation and control parameters, working modes, and independent beam pointing of each beam link support independent control. The scheduling start time of each beam is agreed to be the falling edge of PPS.

[0028] The beam control processing module 2 receives multiple LVDS angle information from the service signal processing module 1. The LVDS angle information transmission time is unified to "PPS falling edge + N*125 + *10us" (N is a positive integer). Considering the inconsistency of angle information transmission delay (maximum inconsistency <10us), it is fixed at "PPS falling edge + N*125 + 20us" (N is a positive integer) for unified parsing. The parsing and transmission time to the Ka phased array antenna module 3 is <100us.

[0029] The LOAD time is parsed and output to the antenna RF network module 3 by the beam control processing module 2 within the FPGA. The LOAD time is fixed as "PPS falling edge + N*125 + *125us" (N is a positive integer), which can ensure that the information is sent and the beam pointing scheduling state is in place.

[0030] According to the mission planning requirements, the service signal processing module 1 loads the software version program and stores the operating frequencies of each pointing area, extracting the corresponding operating frequencies according to the pointing angle information. The service signal processing module 1 sends the intermediate frequency analog signal to the antenna RF network module 3 via the SMA interface, and sends the operating frequencies of the beam control processing module 2 via the LVDS interface. The antenna RF network module 3 performs frequency conversion and amplification of the intermediate frequency and RF signals, while parsing the frequency configuration instructions and adjusting the local oscillator. The antenna RF network module 3 completes beam pointing and wireless transmission / reception according to the transmit beam pointing parameters issued by the service signal processing module 1.

[0031] This device supports real-time switching at frequency points with a switching time of less than 100µs. In agile communication, it can still achieve bidirectional communication or unidirectional signal acquisition. It effectively adapts to frequency avoidance requirements and frequency usage conditions, increasing the availability and flexibility of load equipment.

[0032] This invention supports signal spectrum resource processing within a 400MHz bandwidth, with operating frequency points supporting 50MHz step switching within a 2.5GHz bandwidth, and a switching time of less than 100µs. The phased array antenna's agility period is not less than 125µs, meeting the communication or spectrum monitoring needs of different regions and frequencies. This invention also supports arbitrary configuration and switching of operating frequencies within the Ka band 2.5GHz frequency range, with a switching time of less than 100µs. It can achieve bidirectional communication or spectrum monitoring functions under the constraint of a agility period of not less than 125µs, meeting the application scenarios of different frequencies within different coverage areas.

Claims

1. A satellite-to-ground multi-beam phased array link independent scheduling device supporting Ka-band, characterized in that, It includes a service signal processing module (1), a beam control processing module (2), an antenna RF network module (3), a signal amplification and antenna array module (4), and a time processing module (5). The business signal processing module (1) is used to complete the modulation and demodulation of multiple signals, frequency conversion of signals, analyze the pointing angle information of each beam according to the task planning, working mode, satellite position, and target position information, and configure the transmission beam control processing module (2); the pointing angle information includes azimuth angle and off-axis angle; The beam control processing module (2) completes the calculation of the azimuth angle and off-axis angle of each beam, decomposes the amplitude weighting and phase value of each internal channel component, and generates a timing load signal by outputting the working clock and second pulse according to the time processing module (5), with a timing period of 125us. The antenna radio frequency network (3) configures the amplitude weighting and phase configuration of each channel according to the decomposition results issued by the beam control processing module (2), and completes the execution according to the Load signal, with an execution time of less than 100ns; The signal amplification and antenna array module (4) completes signal drive stage amplification and wireless signal transmission and reception; The time processing module (5) generates a 100MHz working clock signal and a second pulse signal, which are distributed to the service signal processing module (1) and the beam control processing module (2) to ensure that the service signal and the pointing time of each beam are highly accurate.

2. The independent scheduling device for a satellite-to-ground multi-beam phased array link supporting Ka-band as described in claim 1, characterized in that, The business signal processing module (1), beam control processing module (2), and antenna radio frequency network (3) adopt a modular architecture splicing method. The operation and control parameters, working modes, and independent beam pointing of each beam link support independent control. The scheduling start time of each beam is agreed to be the falling edge of the second pulse. The beam control processing module (2) receives the service signal processing module (1) multi-channel LVDS angle information. The LVDS angle information transmission time is uniformly set to: falling edge of second pulse + N×125 + 10us, where N is a positive integer. It is uniformly parsed at the falling edge of PPS + N×125 + 20us. The LOAD time is parsed by the beam control processing module (2) and output to the antenna RF network module (3). The LOAD time is fixed as: falling edge of PPS + N×125 + 125us. According to the requirements of the task planning, the service signal processing module (1) loads the software version program and completes the signal processing and frequency conversion of each beam, and calculates the actual pointing angle information of each service beam; the service signal processing module (1) sends the radio frequency analog signal to the antenna radio frequency network module (3) through the SMA interface, and sends the angle information of each service beam to the beam control processing module (2) through the LVDS interface; the beam control processing module (2) completes the resolution of the angle information, and configures the amplitude weighting value and phase value of each internal component in parallel through the SPI bus; the antenna radio frequency network module (3) completes the amplification of the radio frequency signal, and completes the pointing of each beam according to the component amplitude and phase value information issued by the beam control processing module (2).

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