A method for online detection of a transceiver channel fault of a phased array wireless network communication device

Abstract

The application relates to a kind of phased array wireless network communication equipment transceiving channel fault online detection methods, and relates to the field of phased array equipment fault detection.In the communication monitoring air interface message interface, monitoring information field and monitoring waveform are designed, when two nodes in the network communicate, the transmitting node air interface sends the communication signal containing monitoring information and monitoring waveform, the receiving node sends the channel number of each receiving channel and the amplitude information of the received single-frequency waveform to the back-end processor, according to the transmitting signal power, relative distance, antenna gain, transmitting / receiving channel gain, the theoretical value of the received signal power can be obtained, the theoretical value is compared with the received signal power obtained by the receiving channel, and whether the transmitting or receiving channel is normal is determined through algorithm and criterion, so that the transceiving channel fault online real-time detection of phased array communication equipment in the process of wireless communication is finally completed.

Description

Technical Field

[0001] This invention relates to the field of phased array equipment fault detection. Background Technology

[0002] The transmit and receive channels of an antenna array directly affect the performance of a phased array communication system. During operation, when there are faults in the receive and transmit channels, or when individual channels experience intermittent faults, the system needs to detect the fault points in real time and assess whether the entire phased array can meet the current mission requirements. Existing methods for detecting transmit and receive channel faults typically involve testing all channels before the mission, or adding dedicated monitoring circuits or a few additional components to achieve online fault monitoring of the transmit and receive channels. This increases the complexity of the transmit and receive channel circuits, as well as the size, weight, and power consumption of the components, reducing the reliability of the equipment and failing to meet the requirements of applications with high requirements for size, weight, or reliability. Achieving real-time online monitoring of the transmit and receive channel fault status without adding dedicated monitoring circuits or components is a significant design challenge. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides an online fault detection method for the transmission and reception connectivity of phased array wireless network communication equipment.

[0004] To achieve the above objectives, the present invention is implemented through the following solution:

[0005] In the communication monitoring air interface of the phased array communication equipment, design monitoring information fields and monitoring waveforms. The monitoring information fields include: the local node's transmission channel number, transmission power, and location information; the faulty transmission channel number of the other node; and the monitoring waveform is a single-frequency signal of known frequency. The monitoring information and waveform do not occupy normal operating time slots and do not affect normal equipment communication. Communication nodes A and B should be directly visible in the far field and able to communicate normally during single-channel transmission and reception. They should be able to enter the communication state normally during initial communication. The following steps are included:

[0006] Step 1: Assume node A has m transmit / receive channels and node B has n transmit / receive channels. The phased array communication equipment node A's m transmit channels sequentially and cyclically transmit communication radiation signals containing monitoring information and monitoring waveforms. The monitoring information content contained in the communication signal of the i-th transmit channel is the transmit channel number N of node A. Ai Node A transmit power Pt Ai Node B transmission fault channel number E Bj If no transmission failure channel is detected, the node is idle; the current position information of node A is PositionA, where i∈[1,m], j∈[1,n];

[0007] Step 2: Node B's n receiving channels simultaneously receive the transmitted signal from Node A, and perform demodulation, frame synchronization and message parsing on the beam-synthesized signal. When the correct communication frame is parsed, Node B calculates the distance d between the two nodes based on the coordinate information of Node A and the position information PositionB of Node B.

[0008] Step 3: Node B uses the transmitted channel number N from node A, which has been resolved. Ai Transmission power Pt Ai After the message content, the radio propagation model is used. Calculate the theoretical received power value of the j-th receiving channel of node B, then calculate the monitoring threshold value P of the j-th receiving channel. THBj =kPr Bj , k∈[0.75,1), where Gt Ai and Gt Bj Let represent the antenna gain of the i-th transmit channel of node A and the j-th receive channel of node B, respectively, where λ is the wavelength, L is the system loss factor, and α is the path attenuation exponent.

[0009] Step 4: After successful parsing of the communication monitoring message, the end time of the monitoring information is used as the reference point for monitoring waveform acquisition. The monitoring signals of the n receiving channels before beamforming are acquired at regular intervals to obtain the received power Pr' of each receiving channel at node B. Bj ;

[0010] Step 5: Monitor for abnormalities in the transmit channel of Node A and the receive channel of Node B:

[0011] When the received power value Pr' of the j-th receiving channel of node B Bj <P THBj And there exists a receiving power Pr' of the k-th receiving channel. Bk ≥P THBk If (k≠j), then the j-th receiving channel of node B is considered abnormal, and the number of abnormalities of that receiving channel is CountBr. j =CountBr j +1, where CountBr j The initial value is 0;

[0012] When the received power Pr' of all receiving channels of node B Bj <P THBj If node A's i-th transmission channel is considered faulty, then when node B communicates with node A again, it will record the faulty transmission channel number E in the monitoring information. Ai If the data is sent to node A, then the number of abnormal transmission channels (CountAt) is calculated. i =CountAt i +1, where CountAt iThe initial value is 0;

[0013] Step 6: Steps 2 to 5 can complete the anomaly monitoring of the transmission channel of node A and the reception channel of node B. Similarly, during the communication between the two nodes, node B transmits a communication monitoring message, which is received by node A, thus completing the anomaly monitoring of the reception channel of node A and the transmission channel of node B.

[0014] Step 7: When the abnormal probability of a certain communication node's receive / transmit channel reaches a predetermined probability, that is, when the number of abnormal occurrences of the receive / transmit channel within a fixed number of communication attempts reaches a predetermined number, the channel is considered to have failed. The faulty channel is then reported to the higher-level system, and the faulty channel is avoided in subsequent communications. If the failure is in the transmit channel, the channel will no longer transmit communication messages; if the failure is in the receive channel, the channel will no longer receive signals, and the device will no longer monitor the faulty channel.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention eliminates the need for specially designed fault detection circuits or additional monitoring devices, thus reducing the complexity of antenna circuit design.

[0017] 2. Real-time detection and location of transceiver channel faults improve the testability and maintainability of the equipment, reduce the fault detection time of transceiver channels, and can actively avoid faulty channels during operation, thereby improving the reliability of the communication system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an air interface communication message.

[0019] Figure 2 This is a schematic diagram of the transceiver channel for an example embodiment;

[0020] Figure 3 This is a flowchart of the present invention. Detailed Implementation

[0021] The implementation process of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] New communication message format as follows Figure 1 As shown, the monitoring information field and monitoring waveform in the ordinary communication monitoring air interface are designed to include the transmission channel number, transmission power, location information, the faulty transmission channel number of the other node, and the monitoring waveform. The monitoring waveform is a single-frequency signal with a fixed length and a frequency of 10MHz. The transmission time of this message does not occupy the normal communication time slot and does not affect the normal communication of the equipment. Communication nodes A and B communicate under the condition that the far field is open and directly visible and that the single-channel transmission and reception can communicate normally. They should be able to enter the communication state normally during the initial communication.

[0024] The transceiver channel layout in this embodiment is as follows: Figure 2 As shown: The digital array antennas at nodes A and B are 8×8 arrays, with the antenna elements numbered sequentially from top to bottom and left to right. One antenna element can be connected to one transmit channel and one receive channel, or multiple antenna elements can be connected to one transmit channel and one receive channel. In this embodiment, it is assumed that each transmit / receive channel shares 8 antenna elements, meaning that every 8 antenna elements are connected to the same digital transmit channel and digital receive channel, for a total of 8 transmit / receive channels.

[0025] The eight transmit channels of the phased array communication equipment node A transmit communication radiation signals containing monitoring information and monitoring waveforms sequentially from 1 to 8. The eight receive channels of node B simultaneously receive the transmitted signals from node A, demodulate the beam-synthesized signals, perform frame synchronization, and parse the messages. The message content includes the transmit channel number N of node A. Ai Transmission power Pt Ai Location information of node A and fault channel number E of node B Bj If no fault is detected in the transmission channel of the other node, it will be idle.

[0026] Node B's eight receiving channels simultaneously receive the transmitted signals from Node A. The beam-synthesized signals are demodulated, synchronized, and parsed. When the correct communication frame is parsed, Node B calculates the distance d between the two nodes based on the location information of Node A and the location information PositionB of Node B.

[0027] Node B uses the transmitted channel number N from node A as parsed. Ai Transmission power Pt Ai After the message content, the radio propagation model is used. Calculate the theoretical received power value of the j-th receiving channel of node B, then calculate the monitoring threshold value P of the j-th receiving channel. THBj =kPr Bj , k∈[0.75,1), where Gt Ai and Gt Bj Let λ represent the antenna gain of the i-th transmit channel of node A and the j-th receive channel of node B, respectively. Let λ be the wavelength, L be the system loss factor, and α be the path attenuation exponent, which is measured based on the actual environment.

[0028] After successful parsing of the communication monitoring message, the end time of the monitoring information is used as the reference point for monitoring waveform acquisition. The monitoring signals of the n receiving channels before beamforming are acquired at regular intervals to obtain the received power Pr' of each receiving channel of node B. Bj .

[0029] Using algorithms and criteria, monitor abnormal situations in the transmit channel of node A and the receive channel of node B: when the received power value Pr' of the j-th receive channel of node B... Bj <P THBj And there exists a receiving power Pr' of the k-th receiving channel. Bk ≥P THBk If (k≠j), then the j-th receiving channel of node B is considered abnormal, and the number of abnormalities of that receiving channel is CountBr. j =CountBr j +1, where CountBr j The initial value is 0; when the received power Pr' of all receiving channels of node B is 0. Bj <P THBj If node A's i-th transmission channel is considered faulty, then when node B communicates with node A again, it will record the faulty transmission channel number E in the monitoring information. Ai If the data is sent to node A, then the number of abnormal transmission channels (CountAt) is calculated. i =CountAt i +1, where CountAt i The initial value is 0;

[0030] When the abnormal probability of a certain communication node's receive / transmit channel reaches a predetermined probability, that is, when the number of abnormal occurrences of the receive / transmit channel within a fixed number of communication cycles reaches a predetermined number, the channel is considered to be faulty. The faulty channel is then reported to the superior system, and the faulty channel is avoided in subsequent communications. If the fault is in the transmit channel, the channel will no longer transmit communication messages; if the fault is in the receive channel, the channel will no longer receive signals, and the equipment will no longer monitor the faulty channel.

[0031] The above process can complete the anomaly monitoring of the transmitting channel of node A and the receiving channel of node B. Similarly, during the communication between the two nodes, node B transmits a communication monitoring message, which is received by node A. This can complete the anomaly monitoring of the receiving channel of node A and the transmitting channel of node B, thereby completing the real-time online fault detection of the phased array communication equipment's transceiver channels.

[0032] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A method for online detection of transceiver channel faults in a phased array wireless network communication device, characterized in that: The communication monitoring air interface of the phased array wireless network communication device includes monitoring information fields and monitoring waveforms. The monitoring information fields include: the local node's transmission channel number, transmission power, and location information; and the faulty transmission channel number of the other node. The monitoring waveform is a single-frequency signal of known frequency. The monitoring information and waveform do not occupy normal operating time slots and do not affect normal communication. Communication nodes A and B can communicate normally when they are directly visible in the far field and using single-channel transmission and reception, and can enter the communication state normally during initial communication. The online fault detection method includes the following steps: Step 1: Assume node A has m transmit / receive channels and node B has n transmit / receive channels. The phased array wireless network communication device at node A uses its m transmit channels to sequentially and cyclically transmit communication radiation signals containing monitoring information and monitoring waveforms. The monitoring information contained in the communication signal of the i-th transmit channel is the transmit channel number of node A. Node A transmit power Node B transmission fault channel number If no transmission failure channel is detected, then the node is idle; Node A's current position information is PositionA, where... ; Step 2: Node B's n receiving channels simultaneously receive the transmitted signal from Node A, and perform demodulation, frame synchronization and message parsing on the beam-synthesized signal. When the correct communication frame is parsed, Node B calculates the distance d between the two nodes based on the coordinate information of Node A and the position information PositionB of Node B. Step 3: Node B uses the transmitted channel number from Node A as parsed. Transmission power Following the message content, the radio propagation model is used: ； Calculate the theoretical received power value of the j-th receiving channel of node B, then calculate the monitoring threshold value of the j-th receiving channel. , ,in and Let represent the antenna gains of the i-th transmit channel of node A and the j-th receive channel of node B, respectively. Where wavelength is L and system loss factor is L. The path decay exponent; Step 4: After successful parsing of the communication monitoring message, the end time of the monitoring information is used as the reference point for monitoring waveform acquisition. The monitoring signals of the n receiving channels before beamforming are acquired at regular intervals to obtain the received power of each receiving channel of node B. ; Step 5: Monitor for abnormalities in the transmit channel of Node A and the receive channel of Node B: When the received power value of the j-th receiving channel of node B And there exists a receiving power of the k-th receiving channel. If the j-th receiving channel of node B is considered abnormal, then the number of abnormalities of that receiving channel is... ,in, The initial value is 0; When all receiving channels of node B receive power If node A's i-th transmission channel is considered faulty, then when node B communicates with node A again, it will record the faulty transmission channel number of node A in the monitoring information. If the data is sent to node A, then the number of abnormal transmission channels is recorded. ,in, The initial value is 0; Step 6: Steps 2 to 5 complete the anomaly monitoring of the transmission channel of node A and the reception channel of node B. Similarly, during the communication between the two nodes, node B transmits a communication monitoring message, which is received by node A, thus completing the anomaly monitoring of the reception channel of node A and the transmission channel of node B. Step 7: When the abnormal probability of a certain communication node's receive / transmit channel reaches a predetermined probability, that is, when the number of abnormal occurrences of the receive / transmit channel within a fixed number of communication attempts reaches a predetermined number, the receive / transmit channel is considered to have failed. The faulty channel is then reported to the higher-level system, and the faulty channel is avoided in subsequent communications. If the fault is in the transmit channel, the transmit channel will no longer transmit communication messages; if the fault is in the receive channel, the receive channel will no longer receive signals, and the device will no longer monitor the faulty channel.

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