A main channel selection system and method for multi-beam multi-channel signal reception

Abstract

The present invention belongs to the field of signal channel selection and proposes a main channel selection system and method for multi-beam multi-channel signal reception. The system includes a radio frequency board and a signal processing board. The signal processing board is equipped with a ZYNQ chip, and the ZYNQ chip is provided with an interconnected signal processing module and a selection module. The signal processing module is located at the PL end, receives the digital signal of the A / D conversion module and the control command of the selection module, completes digital signal demodulation and decoding through the PL processing mechanism, extracts the signal-to-noise ratio value, and controls the external service terminal to select the main channel according to the control command; the selection module is located at the PS end, receives the signal-to-noise ratio value, generates a control command in combination with the main channel selection algorithm under the PS processing mechanism, and sends it to the PL end to complete the main channel selection. The present invention realizes efficient processing of complex signals through deep integration of software and hardware, and can be quickly configured and deployed in multiple scenarios.

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] The rapid development of the communications industry has led to increased demands for high bandwidth, low latency, and high stability in wireless signals. To achieve high-quality wireless information transmission, the industry is adopting multi-beam technology, multi-channel networks, and other approaches to build more comprehensive wireless signal transmission assurance mechanisms. However, simply relying on adding hardware configurations and software features to stack assurance methods not only significantly increases system complexity but also reduces the system's environmental adaptability, as reflected in the following three aspects:

[0003] 1. System Complexity and Resource Waste: Traditional solutions rely excessively on redundant hardware configurations, such as multiple independent A / D conversion units. This leads to bloated system architectures, low hardware resource utilization, and difficulty adapting to dynamically changing communication environments. For example, during normal operation, redundant channels remain idle for extended periods, resulting in a double waste of energy and costs.

[0004] 2. Inadequate adaptability to dynamic environments: Existing channel switching strategies often rely on fixed thresholds or periodic polling mechanisms, lacking the ability to accurately assess channel quality in real time. When channel conditions fluctuate rapidly, the system cannot respond promptly, easily leading to switching delays or misjudgments, which can seriously impact the stability of the communication link.

[0005] 3. In traditional system architectures, the signal processing module and the analysis module are independent of each other, resulting in large delays in the data interaction process. This makes it difficult to meet the strict real-time requirements of high-speed signal processing and limits the improvement of the overall system performance. Summary of the Invention

[0006] The object of the present invention is to provide a main channel selection system for multi-beam multi-channel signal reception to solve the above-mentioned problems in the prior art.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A main channel selection system for multi-beam multi-channel signal reception, comprising: a radio frequency board and a signal processing board;

[0009] The RF board is provided with multiple A / D conversion combination units that are mutually active and standby; 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 based on the beam information loaded by the external service terminal, and sequentially perform frequency conversion and filtering on the received wireless signals before transmitting them to the A / D conversion module for analog-to-digital conversion into digital signals;

[0010] The signal processing board is equipped with a ZYNQ chip, which is equipped with interconnected signal processing modules and selection modules, including:

[0011] The signal processing module is located at the PL end 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, it demodulates and decodes the digital signal in sequence to extract the signal-to-noise ratio value. According to the control command, it controls the external service terminal to complete the main channel selection.

[0012] The selection module is set at the PS end and is used to receive the signal-to-noise ratio value sent by the signal processing module. Under the PS processing mechanism, it generates a control command for controlling channel selection based on the received signal-to-noise ratio value and the main channel selection algorithm, and sends it to the signal processing module of the PL.

[0013] A method for selecting a primary channel for receiving a multi-beam multi-channel signal comprises the following steps:

[0014] S1. Initial preparation: The external service terminal performs loading operations based on the beam information, obtains the beam numbers and receiving frequencies corresponding to n beams, and completes the initial preparation for signal reception;

[0015] S2. The RF board allocates multiple receiving channels based on the beam number and receiving frequency. Subsequently, each channel cyclically receives the wireless signal corresponding to the currently allocated beam number and receiving frequency according to the pre-set polling time interval.

[0016] S3, performing frequency conversion, filtering, and A / D conversion on the wireless signal received by each receiving channel in sequence to generate a digital signal;

[0017] S4. Use the signal processing module on the PL side of the ZYNQ chip on the signal processing board to demodulate and decode the digital signal corresponding to each receiving channel in turn, and extract the signal-to-noise ratio value;

[0018] S5. Based on the signal-to-noise ratio value extracted in step S4, a main channel selection algorithm is used in the selection module of the ZYNQ chip PS end on the signal processing board to generate a control command for controlling channel selection. The signal processing module then controls the external service terminal to complete the main channel selection.

[0019] Furthermore, the multiple receiving channels are preferably two receiving channels, and the two receiving channels are respectively a first channel and a second channel.

[0020] Furthermore, the specific process of using the main channel selection algorithm in the selection module in step S5 includes:

[0021] S5.1. Based on the PS mechanism, sort the received signal-to-noise ratios from high to low. Use the beams corresponding to the top two highest signal-to-noise ratios as the received signals and configure them in the first and second channels, respectively. Use the first channel as the primary channel.

[0022] S5.2. Determine the locking status of the first channel and the second channel based on a preset locking threshold, and adjust the main channel in real time according to the determination result.

[0023] Furthermore, the method for determining the locking status of the first channel and the second channel based on the preset locking threshold in step S5.2 is:

[0024] For each channel, the signal-to-noise ratio value is compared with the preset lock threshold. If the channel signal-to-noise ratio value is greater than or equal to the preset lock threshold, the channel is determined to be in a locked state. If it is less than the preset lock threshold, the channel is determined to be in an unlocked state.

[0025] Furthermore, the method for adjusting the primary channel in real time according to the determination result in step S5.2 is:

[0026] When both the first channel and the second channel are in a locked state: at a time interval t, the signal-to-noise ratio values of the first channel and the second channel are sampled five times respectively, the five sampled values of the first channel are averaged to obtain a first signal-to-noise ratio average value, and the five sampled values of the second channel are averaged to obtain a second signal-to-noise ratio average value; the first signal-to-noise ratio average value and the second signal-to-noise ratio average value are compared; if the three second signal-to-noise ratio average values are greater than the first signal-to-noise ratio average value, the second channel is used as the primary channel; otherwise, the first channel continues to be the primary channel;

[0027] When any one of the first and second channels is unlocked, and the same unlocked channel reports unlocked status twice within a time interval of t, the locked channel is immediately switched to the primary channel; otherwise, the original primary channel remains unchanged;

[0028] When both the first channel and the second channel are in unlocked state, and the reporting status of the unlocked channel in the time interval t is all unlocked, it is necessary to jump to step S5.1 again, otherwise the original primary channel remains unchanged.

[0029] Furthermore, the ZYNQ chip is a ZYNQ-7000 chip.

[0030] After adopting the above technical solution, the present invention has the following advantages:

[0031] 1. This invention utilizes a multi-beam, multi-channel receive architecture, enabling flexible configuration of beam and channel numbers based on actual needs. It also supports porting and secondary development on the Zynq chip. Through standardized beam information formats and multi-channel design, the system can be deployed on different hardware platforms and rapidly respond to diverse application scenarios.

[0032] 2. The present invention utilizes a primary channel selection method for multi-beam, multi-channel signal reception to achieve dynamic switching between primary and backup channels. This method automatically selects the signal reception path based on the real-time signal reception quality of each channel. Through the sorting, polling, and decision logic of signal-to-noise ratio values, the system can rapidly switch to the backup channel when signal quality degrades or a fault occurs, ensuring communication stability and continuity. Furthermore, by real-time monitoring of changes in the signal-to-noise ratio (SNR) and the number of unlocks (n), it determines whether the current primary channel needs to be switched. By setting an SNR threshold (e.g., 26 dB) and channel time interval, it can quickly identify the channel status and respond promptly, significantly improving signal reception stability and system response speed.

[0033] 3. This invention utilizes the ZYNQ-7000 series chip as its core and leverages its hardware-software collaborative architecture to place the signal processing module in the Processing Unit (PL) for high-speed parallel signal processing. The primary channel selection method, which utilizes multi-beam, multi-channel signal reception, is implemented in the Processing Unit (PS). This deep integration of hardware and software enables the system to efficiently process complex signals and facilitates rapid configuration and deployment in diverse application scenarios.

[0034] 4. This invention utilizes only two active / standby A / D conversion units, reducing redundancy and resource waste while ensuring system stability. Compared to traditional systems that require numerous redundant channels to ensure reliability, this design requires only a small number of channels to achieve efficient and stable signal reception and switching management. This reduces hardware resource consumption and power consumption while maintaining system performance.

[0035] 5. This invention introduces a loss-of-lock determination and rapid recovery mechanism. When the number of loss-of-lock detections, n, equals 1, the locked channel is immediately switched to the primary channel. When the number of loss-of-lock detections, n, equals 2, the system re-evaluates the channel and jumps to the initial state for channel reestablishment. This rapid recovery mechanism effectively prevents communication interruptions and quickly restores normal operation even when signal reception quality fluctuates significantly, improving the system's fault tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a block diagram of the overall architecture of a main channel selection system for multi-beam multi-channel signal reception according to an embodiment;

[0037] Figure 2 is a flow chart of a method for selecting a primary channel for receiving a multi-beam multi-channel signal according to an embodiment;

[0038] Figure 3 4 is a flow chart of the main channel selection algorithm of the embodiment. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0040] like Figure 1 As shown, this embodiment provides a main channel selection system for multi-beam multi-channel signal reception, including: a radio frequency board and a ZYNQ chip.

[0041] The RF board is provided with multiple A / D conversion combination units that serve as the main and backup units for each other; 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 the external service terminal, and the received wireless signals are sequentially frequency-converted and filtered before being transmitted to the A / D conversion module for analog-to-digital conversion into digital signals.

[0042] The ZYNQ chip is the ZYNQ-7000 chip. The ZYNQ-7000 series is based on Xilinx's first-generation SoC architecture. This chip integrates a dual-core or single-core ARM Cortex-A9-based processing system (PS) and 28nm Xilinx programmable logic (PL). The PL is used to implement custom logic, while the PS is used to implement custom software. Both the PS and PL can operate independently, interacting via an AXI bus. The combination of the two enables multiple functions. This embodiment leverages this feature of the ZYNQ-7000 chip by placing a signal processing module on the PL side of the ZYNQ-7000 chip. This allows for better utilization of the PL's advantages in high-speed logic, arithmetic, and high parallelism for signal processing. Furthermore, in actual development, FPGA chips, often used for software-defined wireless signal processing, are used, making this configuration easier to port. A selection module is set on the PS side of the ZYNQ-7000 chip. The PS development environment uses easy-to-debug languages such as C and C++. For the selection algorithm test of this embodiment, the advantages of the ZYNQ-7000 chip are fully utilized through continuous online modification and debugging, and the entire system structure is more reasonable.

[0043] The signal processing module receives digital signals from the A / D conversion module and control commands from the selection module. Under the PL processing mechanism, it demodulates and decodes the digital signals to extract the signal-to-noise ratio (SNR) value. Based on the control command, it controls the external service terminal to select the primary channel. The selection module receives the SNR value from the signal processing module and, under the PS processing mechanism, generates a control command for channel selection based on the received SNR value and the primary channel selection method for multi-beam, multi-channel signal reception. The command is then sent to the PL signal processing module.

[0044] Based on the above system, this embodiment provides a method for selecting a main channel for receiving multi-beam multi-channel signals. Figure 2 As shown, the method includes the following steps:

[0045] S1. Initial preparation: The external service terminal performs loading operations based on the beam information, obtains the beam numbers and receiving frequencies corresponding to n beams, and completes initial preparations for signal reception, where n ≥ 3. This embodiment uses three beams. See Table 1 for the specific beam formats used.

[0046] Table 1 Beam information content format

[0047]

[0048] S2. The RF board allocates multiple receiving channels based on the beam number and receiving frequency. Each channel then cyclically receives the wireless signal corresponding to the currently allocated beam number and receiving frequency at a set polling interval. In this embodiment, the multiple receiving channels are preferably two receiving channels, namely a first channel and a second channel. The first channel and the second channel poll at a set 500ms interval to receive the corresponding beam signal.

[0049] S3. Perform frequency conversion, filtering, and A / D conversion on the wireless signals received by the first channel and the second channel respectively to generate digital signals.

[0050] S4. Use the signal processing module on the PL side of the ZYNQ chip on the signal processing board to demodulate and decode the digital signal corresponding to each receiving channel in turn, and extract the signal-to-noise ratio value.

[0051] S5. Based on the signal-to-noise ratio value extracted in step S4, the main channel selection algorithm is used in the selection module of the ZYNQ chip PS end on the signal processing board to generate a control command for controlling channel selection. The signal processing module then controls the external service terminal to complete the main channel selection. The implementation process is as follows: Figure 3 As shown, the specific steps are as follows:

[0052] S5.1. Based on the PS mechanism, the received signal-to-noise ratios are sorted from high to low, and the beams corresponding to the first two highest signal-to-noise ratios are used as the received signals. They are configured in the first and second channels respectively, and the first channel is used as the primary channel.

[0053] S5.2. Determine the locking status of the first channel and the second channel based on a preset locking threshold, and adjust the main channel in real time according to the determination result.

[0054] The lock status determination method for each channel is:

[0055] The signal-to-noise ratio value is compared with the preset lock threshold. If the signal-to-noise ratio value of the channel is greater than or equal to the preset lock threshold, the channel is determined to be in a locked state. If it is less than the preset lock threshold, the channel is determined to be in an unlocked state. In this embodiment, the signal-to-noise ratio value is set to 26 as the lock threshold. That is, when the signal-to-noise ratio value of the channel is ≥26, the channel is determined to be in a locked state; when the signal-to-noise ratio value of the channel is <26, the channel is determined to be in an unlocked state. The method for adjusting the main channel in real time based on the determination result is as follows:

[0056] When both the first and second channels are locked, the signal-to-noise ratios of the first and second channels are sampled five times at 50ms intervals. The five sampled values of the first channel are averaged to obtain a first signal-to-noise ratio average, and the five sampled values of the second channel are averaged to obtain a second signal-to-noise ratio average. The first and second signal-to-noise ratio averages are compared. If the three second signal-to-noise ratio averages are greater than the first signal-to-noise ratio average, the second channel is designated as the primary channel; otherwise, the first channel remains the primary channel.

[0057] When any of the first and second channels loses lock, that is, the number of lost locks is 1 and the same lost channel reports two lost lock states within a 50ms interval, the locked channel is immediately switched to the primary channel; otherwise, the original primary channel remains unchanged;

[0058] When both the first channel and the second channel are in unlocked state, that is, the unlocked number is 2 and the reporting status of the unlocked channel at an interval of 50ms is all in unlocked state, it is necessary to jump to step S5.1 again, otherwise the original primary channel remains unchanged.

[0059] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A method for selecting a main channel for receiving multi-beam multi-channel signals, characterized in that: The following steps are involved: S1. Initial preparation: The external service terminal performs loading operations based on 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 allocates multiple receiving channels according to the beam number and receiving frequency; Subsequently, each channel cyclically receives the wireless signal corresponding to the currently assigned beam number and receiving frequency point according to a preset polling time interval; the multiple receiving channels are two receiving channels, and the two receiving channels are respectively a first channel and a second channel; S3, performing frequency conversion, filtering, and A / D conversion on the wireless signal received by each receiving channel in sequence to generate a digital signal; S4. Use the signal processing module on the PL side of the ZYNQ chip on the signal processing board to demodulate and decode the digital signal corresponding to each receiving channel in turn, and extract the signal-to-noise ratio value; S5. Based on the signal-to-noise ratio value extracted in step S4, a main channel selection algorithm is used in the selection module of the ZYNQ chip PS on the signal processing board to generate a control command for channel selection. The signal processing module then controls the external service terminal to complete the main channel selection. Specifically: S5.

1. Based on the PS mechanism, sort the received signal-to-noise ratios from high to low. Use the beams corresponding to the top two highest signal-to-noise ratios as the received signals and configure them in the first and second channels, respectively. Use the first channel as the primary channel. S5.

2. Determine the lock status of the first channel and the second channel based on a preset lock threshold, and adjust the primary channel in real time based on the determination result; The method for determining the lock status of the first channel and the second channel based on the preset lock threshold is as follows: for each channel, the signal-to-noise ratio value is compared with the preset lock threshold value; if the signal-to-noise ratio value of the channel is greater than or equal to the preset lock threshold value, the channel is determined to be in a locked state; if the signal-to-noise ratio value of the channel is less than the preset lock threshold value, the channel is determined to be in an unlocked state; the method for adjusting the primary channel in real time based on the determination result is as follows: When both the first channel and the second channel are in a locked state: at a time interval t, the signal-to-noise ratio values of the first channel and the second channel are sampled five times respectively, the five sampled values of the first channel are averaged to obtain a first signal-to-noise ratio average value, and the five sampled values of the second channel are averaged to obtain a second signal-to-noise ratio average value; the first signal-to-noise ratio average value and the second signal-to-noise ratio average value are compared; if the three second signal-to-noise ratio average values are greater than the first signal-to-noise ratio average value, the second channel is used as the primary channel; otherwise, the first channel continues to be the primary channel; When any one of the first and second channels is unlocked, and the same unlocked channel reports unlocked status twice within a time interval of t, the locked channel is immediately switched to the primary channel; otherwise, the original primary channel remains unchanged; When both the first channel and the second channel are in unlocked state, and the reporting status of the unlocked channel in the time interval t is all unlocked, it is necessary to jump to step S5.1 again, otherwise the original primary channel remains unchanged.

2. A primary channel selection system for multi-beam multi-channel signal reception, the system being configured to implement the primary channel selection method for multi-beam multi-channel signal reception according to claim 1, comprising: The radio frequency board and signal processing board are characterized by: The RF board is provided with multiple A / D conversion combination units that are mutually active and standby; 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 based on the beam information loaded by the external service terminal, and sequentially perform frequency conversion and filtering on the received wireless signals before transmitting them to the A / D conversion module for analog-to-digital conversion into digital signals; The signal processing board is equipped with a ZYNQ chip, which is equipped with interconnected signal processing modules and selection modules, including: The signal processing module is located at the PL end 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, it demodulates and decodes the digital signal in sequence to extract the signal-to-noise ratio value. According to the control command, it controls the external service terminal to complete the main channel selection. The selection module is set at the PS end and is used to receive the signal-to-noise ratio value sent by the signal processing module. Under the PS processing mechanism, it generates a control command for controlling channel selection based on the received signal-to-noise ratio value and the main channel selection algorithm, and sends it to the signal processing module of the PL.

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