Main channel selection system and method for multi-beam multi-channel signal reception

Abstract

The invention belongs to the field of signal channel selection, and provides a main channel selection system and method for multi-beam multi-channel signal receiving. The system comprises a radio frequency board and a signal processing board, a ZYNQ chip is carried on the signal processing board, and a signal processing module and a selection module which are connected with each other are arranged on the ZYNQ chip. The signal processing module is located at a PL end, receives the digital signal of the A / D conversion module and a control command of the selection module, demodulates and decodes the digital signal through a PL processing mechanism, extracts a signal-to-noise ratio value, and controls an external service terminal to select a main channel according to the control command; and the selection module is arranged at the PS end, receives the signal-to-noise ratio value, generates a control command in combination with a main channel selection algorithm under a PS processing mechanism, and sends the control command to the PL end to complete main channel selection. Through deep fusion of software and hardware, efficient processing of complex signals is realized, and quick configuration and deployment in multiple scenes can be realized.

Description

Technical Field

[0001] The present invention relates to the field of signal channel selection, and in particular to a main channel selection system and method for multi-beam multi-channel signal reception. Background Art

[0002] With the rapid development of the communication industry, high bandwidth, low latency, and high stability requirements are put forward for wireless signals. To achieve high-quality wireless information transmission, the industry adopts methods such as multi-beam technology and multi-channel networks to build a more perfect wireless signal transmission guarantee mechanism. However, simply relying on increasing hardware configurations and software functions to stack guarantee methods will not only greatly increase the system complexity but also reduce the system's environmental adaptability, which is specifically reflected in the following three aspects: 1. System complexity and resource waste: Traditional solutions rely too much on redundant hardware configurations, such as multiple sets of independent A / D conversion units, resulting in a bloated system architecture and low utilization rate of hardware resources, making it difficult to adapt to the dynamically changing communication environment. For example, in the normal working state, redundant channels are idle for a long time, causing double waste of energy and cost.

[0003] 2. Insufficient adaptability to dynamic environments: Existing channel switching strategies mostly adopt fixed threshold judgment or periodic polling mechanisms, lacking the ability to accurately evaluate the channel quality in real time. When the channel state fluctuates rapidly, the system cannot respond in time, easily causing switching delays or misjudgments, which will seriously affect the stability of the communication link.

[0004] 3. In the traditional system architecture, the signal processing module and the analysis module are independent of each other, resulting in a large delay in the data interaction process, making it difficult to meet the strict real-time requirements of high-speed signal processing and limiting the improvement of the overall system performance. Summary of the Invention

[0005] The purpose of the present invention is to provide a main channel selection system for multi-beam multi-channel signal reception to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A main channel selection system for multi-beam multi-channel signal reception includes: a radio frequency board and a signal processing board; A plurality of mutually primary and backup A / D conversion combination units are provided on the radio frequency board; each A / D conversion combination unit includes a receiving channel and an A / D conversion module; the receiving channel is used to receive wireless signals according to the beam information loaded by an external service terminal, and after sequentially performing frequency conversion and filtering processing on the received wireless signals, transmit them to the A / D conversion module for analog-to-digital conversion into digital signals; The ZYNQ chip is mounted on the signal processing board, and the signal processing module and the selection module are interconnected on the ZYNQ chip, where: The signal processing module is located on the PL side and is used to receive the digital signal sent by the A / D conversion module and the control command sent by the selection module; under the PL processing mechanism, the digital signal is successively demodulated and decoded to extract the signal-to-noise ratio; according to the control command, it controls the external service terminal to complete the main channel selection; The selection module is located on the PS side and is used to receive the signal-to-noise ratio sent by the signal processing module. Under the PS processing mechanism, according to the received signal-to-noise ratio, combined with the main channel selection algorithm, it generates a control command for controlling the channel selection and sends it to the signal processing module on the PL.

[0007] A main channel selection method for multi-beam multi-channel signal reception includes the following steps: S1. Initial preparation: The external service terminal performs a loading operation according to the beam information, obtains the beam numbers and received frequencies corresponding to n beams, and completes the initial preparation for signal reception; S2. The radio frequency board allocates multiple receiving channels according to the beam numbers and received frequencies; subsequently, each channel cyclically receives the radio signals corresponding to the currently allocated beam numbers and received frequencies at a preset polling time interval; S3. The radio signals received by each receiving channel are successively subjected to frequency conversion, filtering, and A / D conversion processing to generate digital signals; S4. On the signal processing board, use the signal processing module on the PL side of the ZYNQ chip to successively demodulate and decode the digital signals corresponding to each receiving channel to extract the signal-to-noise ratio; S5. According to the signal-to-noise ratio extracted in step S4, in the selection module on the PS side of the ZYNQ chip on the signal processing board, use the main channel selection algorithm for processing. After generating a control command for controlling the channel selection, the external service terminal is controlled by the signal processing module to complete the main channel selection.

[0008] Further, the multiple receiving channels are preferably two receiving channels, namely the first channel and the second channel.

[0009] Furthermore, the specific process of using the main channel selection algorithm for processing in the selection module in step S5 includes: S5.1. Based on the PS mechanism, sort the received signal-to-noise ratios in descending order, use the two beams corresponding to the two highest signal-to-noise ratios as the received signals, and respectively configure them in the first channel and the second channel, and use the first channel as the main channel; S5.2. Based on a preset locking threshold, determine the locking states of the first channel and the second channel, and make real-time adjustments to the main channel according to the determination results.

[0010] Further, the method for determining the locking states of the first channel and the second channel based on a preset locking threshold in step S5.2 is as follows: For each channel, compare the signal-to-noise ratio with the preset locking threshold. If the signal-to-noise ratio of the channel is greater than or equal to the preset locking threshold, determine that the channel is in a locked state; if it is less than the preset locking threshold, determine that the channel is in an unlocked state.

[0011] Further, the method for adjusting the main channel in real time according to the determination result in step S5.2 is as follows: When both the first channel and the second channel are in a locked state: sample the signal-to-noise ratios of the first channel and the second channel five times at time interval t respectively. Average the five sampling values of the first channel to obtain the first signal-to-noise ratio mean value, and average the five sampling values of the second channel to obtain the second signal-to-noise ratio mean value; compare the first signal-to-noise ratio mean value and the second signal-to-noise ratio mean value. If the second signal-to-noise ratio mean value is greater than the first signal-to-noise ratio mean value three times, then use the second channel as the main channel; otherwise, continue to use the first channel as the main channel. When any one of the first channel and the second channel is unlocked, and the same unlocked channel has two reported states of being unlocked within the t time interval, immediately switch the locked channel to be the main channel; otherwise, keep the original main channel unchanged. When both the first channel and the second channel are in an unlocked state, and the reported states of the unlocked channels within the t time interval are all unlocked states, it is necessary to jump back to step S5.1; otherwise, keep the original main channel unchanged.

[0012] Further, the ZYNQ chip is a ZYNQ-7000 chip.

[0013] After adopting the above technical solution, the present invention has the following advantages: 1. The present invention adopts a multi-beam and multi-channel receiving architecture, which can flexibly configure the number of beams and channels according to actual needs, and supports transplantation and secondary development on the ZYNQ chip. Through the standardized beam information format and multi-channel design, the system can be deployed on different hardware platforms and can quickly respond to the requirements of different application scenarios.

[0014] 2. The present invention adopts a main channel selection method for multi-beam multi-channel signal reception to achieve dynamic switching between the main and standby channels. This method can automatically select the signal reception path according to the real-time signal reception quality of each channel. In this method, through the sorting, polling, and decision logic of the signal-to-noise ratio, when the signal quality deteriorates or a fault occurs in the system, it can quickly switch to the standby channel, ensuring the stability and continuity of communication. At the same time, by real-time monitoring the changes in the signal-to-noise ratio (SNR) and the number of out-of-lock (n), it determines whether the current main channel needs to be switched. By setting the SNR threshold (such as 26 dB) and the channel time interval, it can quickly identify the channel state and respond in a timely manner, significantly improving the signal reception stability and the system response speed.

[0015] 3. The present invention takes the ZYNQ-7000 series chips as the core and utilizes its software and hardware co-design architecture. The signal processing module is placed in the PL part to achieve high-speed parallel processing of signals. The main channel selection method for multi-beam multi-channel signal reception is implemented in the PS part, with deep integration of software and hardware, enabling the system to efficiently process complex signals and facilitating rapid configuration and deployment in different application scenarios.

[0016] 4. The present invention only uses two A / D conversion combination units that are mutually the main and standby, which reduces the redundancy and resource waste of the system while ensuring the system stability. Compared with the design of adding a large number of redundant channels to ensure reliability in traditional systems, it only requires a small number of channels to achieve efficient and stable signal reception and switching management, thereby reducing the hardware resource consumption and power consumption of the system while maintaining the system performance.

[0017] 5. The present invention introduces an out-of-lock determination and fast recovery mechanism. When it is detected that the number of out-of-lock n = 1, the locked channel is immediately switched to the main channel; when n = 2, the system re-evaluates the channel and jumps to the initial state for channel reconstruction. This fast recovery mechanism can effectively prevent communication interruption and can quickly resume the normal working state when the signal reception quality fluctuates violently, improving the fault tolerance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall architecture block diagram of the main channel selection system for multi-beam multi-channel signal reception in the embodiment; Figure 2 is the flowchart of the main channel selection method for multi-beam multi-channel signal reception in the embodiment; Figure 3 is the flowchart of the main channel selection algorithm in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.

[0020] As Figure 1As shown in the figure, a main channel selection system for multi-beam multi-channel signal reception provided in this embodiment includes: a radio frequency board and a ZYNQ chip.

[0021] A plurality of mutually primary and backup A / D conversion combination units are provided on the radio frequency board; each A / D conversion combination unit includes a receiving channel and an A / D conversion module; the receiving channel is used to receive a wireless signal according to the beam information loaded by an external service terminal, and perform frequency conversion and filtering processing on the received wireless signal in sequence, and then transmit it to the A / D conversion module for analog-to-digital conversion into a digital signal.

[0022] The ZYNQ chip is a ZYNQ-7000 chip. The ZYNQ-7000 series is based on Xilinx's first-generation SoC architecture. This chip integrates a processing system (PS) based on a dual-core or single-core ARM Cortex-A9 and 28nm Xilinx programmable logic (PL). The PL is used to implement custom logic, and the PS is used to implement custom software. Both the PS and the PL can work independently, and they interact through the AXI bus. Through the combination of the two, various functions can be realized. Based on this feature of the ZYNQ-7000 chip in this embodiment, a signal processing module is set at the PL end of the ZYNQ-7000 chip, which can better utilize the processing advantages of the PL for signals in terms of high-speed logic, arithmetic, and high parallelism. And in actual development, the FPGA chip is often selected for software radio signal processing in the early stage, so such a setting is easier to transplant. A selection module is set at the PS end of the ZYNQ-7000 chip. The PS development environment uses languages such as C and C++ that are easy to debug and modify. For the selection algorithm verification of this embodiment, through continuous online modification and debugging, the advantages of the ZYNQ-7000 chip are fully utilized, and the overall system structure is more reasonable.

[0023] The signal processing module is used to receive the digital signal sent by the A / D conversion module and the control command sent by the selection module; under the PL processing mechanism, the digital signal is demodulated and decoded in sequence to extract the signal-to-noise ratio (SNR) value; according to the control command, it controls the external service terminal to complete the main channel selection. The selection module is used to receive the signal-to-noise ratio value sent by the signal processing module, and under the PS processing mechanism, according to the received signal-to-noise ratio value, combined with the main channel selection method for multi-beam multi-channel signal reception, generate a control command for controlling channel selection, and send it to the signal processing module of the PL.

[0024] Based on the above system, this embodiment provides a main channel selection method for multi-beam multi-channel signal reception, as Figure 2 shown, the method includes the following steps: S1. Initial preparation: The external service terminal performs a loading operation based on the beam information, obtains the beam numbers and received frequencies corresponding to n beams, and completes the initial preparation for signal reception, where n ≥ 3. In this embodiment, three beams are selected in total. For the specific beam format used, refer to Table 1.

[0025] Table 1 Content Format of Beam Information

[0026] S2. The radio frequency board allocates multiple receiving channels according to the beam numbers and received frequencies; subsequently, each channel cyclically receives the wireless signals corresponding to the currently allocated beam numbers and received frequencies at the set polling time interval. In this embodiment, the multiple receiving channels are preferably two receiving channels, namely the first channel and the second channel. The first channel and the second channel poll and receive the corresponding beam signals at the set interval of 500 ms.

[0027] S3. The wireless signals received by the first channel and the second channel are sequentially subjected to frequency conversion, filtering, and A / D conversion processing to generate digital signals.

[0028] S4. On the signal processing board, use the signal processing module at the PL end of the ZYNQ chip to sequentially demodulate and decode the digital signals corresponding to each receiving channel, and extract the signal-to-noise ratio values.

[0029] S5. According to the signal-to-noise ratio values extracted in step S4, use the main channel selection algorithm in the selection module at the PS end of the ZYNQ chip on the signal processing board for processing. After generating the control command for controlling the channel selection, complete the main channel selection of the external service terminal through the signal processing module. The implementation process is as Figure 3 shown, and specifically includes the following steps: S5.1. Based on the PS mechanism, sort the received signal-to-noise ratios in descending order, use the two beams with the highest signal-to-noise ratios as the received signals, respectively configure them in the first channel and the second channel, and use the first channel as the main channel.

[0030] S5.2. Based on the preset locking threshold, determine the locking states of the first channel and the second channel, and perform real-time adjustment of the main channel according to the determination results. Among them: The method for determining the locking state of each channel is: Compare the signal-to-noise ratio value with a preset locking threshold. If the signal-to-noise ratio of the channel is greater than or equal to the preset locking threshold, it is determined that the channel is in a locked state. If it is less than the preset locking threshold, it is determined that the channel is in an unlocked state. In this embodiment, the signal-to-noise ratio value is set to 26 as the locking threshold, that is, when the signal-to-noise ratio of the channel ≥ 26, it is determined that the channel is in a locked state; when the signal-to-noise ratio of the channel < 26, it is determined that the channel is in an unlocked state. The method for real-time adjustment of the main channel according to the determination result is as follows: When both the first channel and the second channel are in a locked state: Sample the signal-to-noise ratio values of the first channel and the second channel five times at an interval of 50 ms. Average the five sampled values of the first channel to obtain the first signal-to-noise ratio mean value, and average the five sampled values of the second channel to obtain the second signal-to-noise ratio mean value; Compare the first signal-to-noise ratio mean value and the second signal-to-noise ratio mean value. If the second signal-to-noise ratio mean value is greater than the first signal-to-noise ratio mean value three times, then use the second channel as the main channel, otherwise continue to use the first channel as the main channel; When any one of the first channel and the second channel is unlocked, that is, the number of unlocked channels is 1 and the reported states of the same unlocked channel are both unlocked twice at an interval of 50 ms, immediately switch the locked channel to the main channel; otherwise, keep the original main channel unchanged; When both the first channel and the second channel are in an unlocked state, that is, the number of unlocked channels is 2 and the reported states of the unlocked channels at an interval of 50 ms are all unlocked, it is necessary to jump back to step S5.1, otherwise keep the original main channel unchanged.

[0031] The above embodiments only illustratively explain the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A main channel selection system for multi-beam multi-channel signal reception, comprising: A radio frequency board and a signal processing board, characterized in that: A plurality of mutually primary and standby A / D conversion combination units are provided on the radio frequency board; each A / D conversion combination unit includes a receiving channel and an A / D conversion module; the receiving channel is used to receive a wireless signal according to the beam information loaded by an external service terminal, and sequentially perform frequency conversion and filtering processing on the received wireless signal and then transmit it to the A / D conversion module for analog-to-digital conversion into a digital signal; A ZYNQ chip is mounted on the signal processing board, and an interconnected signal processing module and a selection module are provided on the ZYNQ chip, wherein: The signal processing module is arranged on the PL side and is used to receive the digital signal sent by the A / D conversion module and the control command sent by the selection module; under the PL processing mechanism, the digital signal is sequentially demodulated and decoded to extract the signal-to-noise ratio; the external service terminal is controlled to complete the main channel selection according to the control command; The selection module is arranged on the PS side and is used to receive the signal-to-noise ratio sent by the signal processing module, and under the PS processing mechanism, according to the received signal-to-noise ratio, combine the main channel selection algorithm to generate a control command for controlling the channel selection and send it to the signal processing module on the PL side.

2. A main channel selection method for multi-beam multi-channel signal reception, characterized in that, Including the following steps: S1. Initial preparation, the external service terminal performs a loading operation according to the beam information, obtains the beam numbers and receiving frequencies corresponding to n beams, and completes the initial preparation for signal reception; S2. The radio frequency board distributes a plurality of receiving channels according to the beam numbers and receiving frequencies; Subsequently, each channel cyclically receives the wireless signal corresponding to the currently allocated beam number and receiving frequency at a preset polling time interval; S3. The wireless signal received by each receiving channel is sequentially subjected to frequency conversion, filtering, and A / D conversion processing to generate a digital signal; S4. On the signal processing board, use the signal processing module on the PL side of the ZYNQ chip to sequentially demodulate and decode the digital signal corresponding to each receiving channel, and extract the signal-to-noise ratio; S5. According to the signal-to-noise ratio extracted in step S4, use the main channel selection algorithm to process in the selection module on the PS side of the ZYNQ chip on the signal processing board. After generating a control command for controlling the channel selection, control the external service terminal to complete the main channel selection through the signal processing module.

3. The main channel selection method for multi-beam multi-channel signal reception according to claim 2, characterized in that, The plurality of receiving channels are two receiving channels, which are the first channel and the second channel respectively.

4. A main channel selection method for multi-beam multi-channel signal reception according to claim 3, characterized in that, The specific process of using the main channel selection algorithm for processing in the selection module in step S5 includes: S5.

1. Based on the PS mechanism, sort the received signal-to-noise ratios in descending order, use the two highest signal-to-noise ratio corresponding beams as the received signals, respectively configure them in the first channel and the second channel, and use the first channel as the main channel; S5.

2. Based on a preset locking threshold, determine the locking states of the first channel and the second channel, and perform real-time adjustment of the main channel according to the determination result.

5. The main channel selection method for multi-beam multi-channel signal reception according to claim 4, wherein The method for determining the locking states of the first channel and the second channel based on a preset locking threshold in step S5.2 is: For each channel, compare the signal-to-noise ratio value with a preset locking threshold. If the signal-to-noise ratio value of this channel is greater than or equal to the preset locking threshold, it is determined that this channel is in a locked state; if it is less than the preset locking threshold, it is determined that this channel is in an unlocked state.

6. The main channel selection method for multi-beam multi-channel signal reception according to claim 5, characterized in that, The method for making real-time adjustment to the main channel according to the determination result in step S5.2 is as follows: When both the first channel and the second channel are in a locked state: sample the signal-to-noise ratio values of the first channel and the second channel five times respectively at a time interval t. Average the five sampled values of the first channel to obtain the first signal-to-noise ratio average value, and average the five sampled values of the second channel to obtain the second signal-to-noise ratio average value; compare the first signal-to-noise ratio average value and the second signal-to-noise ratio average value. If the second signal-to-noise ratio average value is greater than the first signal-to-noise ratio average value three times, then use the second channel as the main channel; otherwise, continue to use the first channel as the main channel. When any one of the first channel and the second channel is unlocked, and the same unlocked channel has two reported states of being unlocked within the time interval t, immediately switch the locked channel to the main channel; otherwise, keep the original main channel unchanged. When both the first channel and the second channel are in an unlocked state, and the reported states of the unlocked channels within the time interval t are all in an unlocked state, it is necessary to jump back to step S5.1; otherwise, keep the original main channel unchanged.

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