CN109818644A - Signal synchronizing method, device, computer equipment and storage medium - Google Patents
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Abstract
This application involves a kind of signal synchronizing methods, device, computer equipment and storage medium, the data that will acquire from node are after different filters, obtained the first correlation and the second correlation, then the maximum value of the maximum value of the first correlation and the second correlation is compared with predetermined threshold value, synchronization is compensated to reception signal when comparison result is address code successful match, due to including two consecutive spread spectrum symbol periods in the data of acquisition, in this way, when determining maximum value from first and second correlation, it is to progress maximum value search in continuous 2N correlation, the maximum value determined also is true peak value, erroneous detection is avoided when i.e. noise jamming is big for low carrier-to-noise ratio to spurious correlation peak value, improve the reliability of address code detection, separately after address code successful match, pass through the carrier frequency of calculating Rate deviation and sign synchronization deviation compensate, it is ensured that receiver signal quickly, reliably synchronizes in wireless communication system.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a signal synchronization method and apparatus, a computer device, and a storage medium.
Background
With the rapid development of the internet of things technology, the application of the internet of things technology in various fields is more and more extensive, and the wireless communication technology is also more and more extensive as one of the main communication technologies of the internet of things. Therefore, in the increasingly widespread application of wireless communication technology, high demands are made on low power consumption, long-distance transmission, and the like of a wireless communication system.
Generally, in order to meet the requirement of ultra-long distance transmission, a receiver in a wireless communication system needs to operate in an extremely low carrier-to-noise ratio channel, which reduces the accuracy and efficiency of received signals, thereby affecting the synchronization problem of the received signals in the wireless communication system.
Therefore, how to synchronize the receiver signals in the wireless communication system quickly and reliably becomes a technical problem to be solved urgently.
Disclosure of Invention
In view of the above, it is necessary to provide a signal synchronization method, a signal synchronization apparatus, a computer device, and a storage medium, in order to quickly and reliably synchronize a receiver signal in a wireless communication system.
In a first aspect, an embodiment of the present invention provides a signal synchronization method, where the method includes:
acquiring data with a spread spectrum symbol length comprising two continuous spread spectrum symbol periods from a received signal;
respectively adopting different preset matched filters to carry out matched filtering on the data to obtain the first correlation value and the second correlation value;
respectively comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value to obtain a comparison result;
and if the comparison result is that the address codes are successfully matched, performing compensation synchronization on the received signals.
In one embodiment, if the predetermined threshold comprises a comparison threshold; comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value respectively to obtain a comparison result, including:
judging whether the maximum value of the first correlation value and the maximum value of the second correlation value are both larger than the comparison threshold value;
if yes, the comparison result is that the address code matching is successful;
if not, the comparison result is that the address code matching is unsuccessful.
In one embodiment, if the predetermined threshold value includes a high threshold value and a low threshold value; comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value respectively to obtain a comparison result, including:
comparing the maximum value of the first correlation value and the maximum value of the second correlation value with the high threshold value, respectively;
if the maximum value of the first correlation value and the maximum value of the second correlation value are both greater than the high threshold value; the comparison result is that the address code is successfully matched;
if the maximum value of the first correlation value and the maximum value of the second correlation value are both smaller than the high threshold value, the comparison result is that the address code matching is unsuccessful;
and if the maximum value of the first correlation value is smaller than the high threshold value and the maximum value of the second correlation value is larger than the high threshold value, or the maximum value of the first correlation value is larger than the high threshold value and the maximum value of the second correlation value is smaller than the high threshold value, determining the comparison result according to the rechecking result.
In one embodiment, before the determining the comparison result according to the rechecking result, the method includes:
judging whether the current data meet a preset rechecking condition or not;
if the current data meet the re-inspection condition, entering a re-inspection process;
and if the current data does not meet the re-inspection condition, entering a dormant state.
In one embodiment, the determining whether the current data meets the review condition includes:
if the maximum value of the first correlation value is smaller than the high threshold value and the maximum value of the second correlation value is larger than the high threshold value, judging whether the maximum value of the first correlation value is larger than the low threshold value;
if the maximum value of the first correlation value is larger than the lower threshold value, determining whether the current checking times is smaller than a preset critical value;
and if the current detection times are smaller than the preset critical value, the current data meet the re-inspection condition.
In one embodiment, the determining whether the current data meets the review condition further includes:
if the maximum value of the first correlation value is greater than the high threshold value and the maximum value of the second correlation value is less than the high threshold value, judging whether the maximum value of the second correlation value is greater than the low threshold value;
if the maximum value of the second correlation value is larger than the lower threshold value, determining whether the current checking times is smaller than a preset critical value;
and if the current detection times are smaller than the preset critical value, the current data meet the re-inspection condition.
In one embodiment, the entering a review process if the current data meets the review condition includes:
if the current data meet the re-inspection condition, acquiring data in a received signal of the next period;
and re-determining the address code matching result according to the data in the received signal of the next period.
In one embodiment, if the comparison result is that the address code matching is successful, performing compensation synchronization on the received signal includes:
acquiring a serial number corresponding to the maximum value of the first correlation value and the maximum value of the second correlation value, and calculating the carrier frequency deviation and the symbol synchronization deviation;
and compensating and synchronizing the received signals according to the carrier frequency deviation and the symbol synchronization deviation.
In a second aspect, an embodiment of the present invention provides a signal synchronization apparatus, where the apparatus includes:
an obtaining module, configured to obtain data with a spreading symbol length including two consecutive spreading symbol periods from a received signal;
the filtering module is used for respectively adopting different preset matchers to carry out matched filtering on the data to obtain the first correlation value and the second correlation value;
the comparison module is used for comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value respectively to obtain a comparison result;
and the compensation module is used for performing compensation synchronization on the received signal if the comparison result is that the address codes are successfully matched.
In a third aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps described in any of the above first aspect when executing the computer program.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps described in any of the embodiments of the first aspect above.
In the signal synchronization method, the device, the computer device and the storage medium provided by the embodiment of the application, the slave node obtains a first correlation value and a second correlation value after data acquired from a received signal passes through different filters, then compares the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value, and performs compensation synchronization on the received signal when the address code matching is successful according to the comparison result, because the acquired data comprises two continuous spread spectrum symbol periods, when the maximum value is determined from the first correlation value and the second correlation value, the maximum value is searched from 2N continuous correlation values, the determined maximum value is also a real peak value, false correlation peak value detection is avoided when the low carrier-to-noise ratio, namely noise interference is large, the reliability of address code detection is improved, and in addition, after the address code matching is successful, compensation is performed through the calculated carrier frequency deviation and symbol synchronization deviation, fast and reliable synchronization of receiver (slave node) signals in a wireless communication system can be ensured.
Drawings
Fig. 1 is a diagram illustrating an application environment of a signal synchronization method according to an embodiment;
fig. 2 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 2a is a schematic flowchart of a signal synchronization method according to an embodiment;
fig. 2b is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 3 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 4 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 5 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 6 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 7 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 8 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 9 is a flowchart illustrating a signal synchronization method according to an embodiment;
fig. 10 is a block diagram of a signal synchronization apparatus according to an embodiment;
fig. 11 is a block diagram of a signal synchronization apparatus according to an embodiment;
fig. 12 is a block diagram of a signal synchronization apparatus according to an embodiment;
fig. 13 is a block diagram of a signal synchronization apparatus according to an embodiment;
fig. 14 is a block diagram of a signal synchronization apparatus according to an embodiment;
fig. 15 is a block diagram of a signal synchronization apparatus according to an embodiment;
fig. 16 is a block diagram illustrating a signal synchronization apparatus according to an embodiment;
fig. 17 is a block diagram of a signal synchronization apparatus according to an embodiment;
FIG. 18 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The signal synchronization method provided by the embodiment of the present application can be applied to the wireless communication system shown in fig. 1. As shown in fig. 1, the wireless communication system includes a master node 101 and a plurality of slave nodes 102. The master node 101 may be a cloud server, a remote server, or the like, and the slave node 102 may be various personal computers, notebook computers, smart phones, tablet computers, computer devices, or the like, and the specific forms of the master node 101 and the slave node 102 are not limited in the present application; the master node 101 may perform wireless or wired data transmission with a plurality of slave nodes 102.
Embodiments of the present application provide a signal synchronization method, apparatus, computer device, and storage medium, which are intended to solve the technical problem that how to synchronize a receiver signal in a wireless communication system quickly and reliably becomes urgent to be solved. The following describes in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems by embodiments and with reference to the drawings. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. It should be noted that, according to the signal synchronization method provided by the present invention, the execution subject is a slave node (receiver), wherein the execution subject may also be a signal synchronization apparatus, and the apparatus may be implemented by software, hardware, or a combination of software and hardware to become part or all of signal synchronization.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
In an embodiment, fig. 2 provides a schematic flow chart of a signal synchronization method, where the embodiment relates to a specific process of outputting different correlation values after data obtained from a received signal by a node passes through different filters, comparing a maximum value of the different correlation values with a preset threshold value, and performing compensation synchronization on the received signal when a comparison result is that address code matching is successful. As shown in fig. 2, the method includes:
s101, acquiring data with a spreading symbol length including two consecutive spreading symbol periods from a received signal.
In this embodiment, the received signal indicates a wake-up code packet and data sent by the master node to the slave node, where the spreading symbol is a signal generated by a spreading sequence, and the spreading sequence may be a preamble C1 or C2 in the wake-up code packet, for example, the wake-up code combined packet sent by the master node is as shown in fig. 2a, C1 in fig. 2a is a first preamble and is a constant-envelope zero-autocorrelation sequence, C2 is a second preamble and is a conjugate sequence of C1, C1 and C2 constitute a base unit, which collectively serve as an address code of the slave node, and a plurality of base units are combined to constitute the wake-up code combined packet. The constant-envelope Zero-autocorrelation sequence may be generated by a coordinate rotation digital calculator, and the constant-envelope Zero-autocorrelation sequence may be any cazac (constant Amplitude Zero Auto correlation) sequence, such as: Zadoff-Chu sequence (i.e., ZC sequence), Frank sequence, Golomb polyphase sequence, and Chirp sequence, etc., which are not limited in this embodiment. Taking the slave node as k slave node as an example, when the master node needs to send data to k slave node, the address code composed of C1 and C2 is the address code of k slave node. The number of the slave nodes may be multiple, and the wake-up period of each slave node is the same, as shown in fig. 2b, the wake-up period T is equal to the detection duration plus the sleep duration of each slave node, Td in fig. 2b is the detection duration of the slave node, i.e. the time when the slave node receives a wake-up code after automatically waking up, and Tslp is the sleep duration of the slave node in one wake-up period. During the communication between the master node and the slave node, the slave node may alternately operate in the receiving-sleep-receiving-sleep mode according to the above-mentioned wake-up period. Wherein, each slave node needs to detect the wake-up code (if the master node transmits the wake-up code) in each wake-up period, and the length Tw > T of the wake-up code combination is needed. Specifically, when the master node needs to transmit data to the slave node k, a wake-up code packet with a length T is transmitted first, the data includes the preamble symbol (C1, k, C2, k) of the address code of the slave node k, and the data is transmitted after the wake-up code packet. Each slave node automatically wakes up at a predetermined certain moment and enters a wake-up code packet detection state. In the wake-up code packet detection state, the slave node takes a local ZC sequence as a reference signal to carry out matching detection on a received signal. If the detection is not successful, the slave node immediately enters a dormant state; if the detection is successful, the receiving state is kept until the data sent by the main node is received, and then the sleep mode is entered.
In practical applications, in two consecutive spreading symbol periods (assuming that the spreading symbol period is N, the data length of the two consecutive spreading symbol periods is 2N), a true correlation peak appears in only one spreading symbol period, but a pseudo correlation peak appears in the other spreading symbol period, and the pseudo correlation peak is usually smaller than the true correlation peak. In this step, the slave node obtains the data of which the spreading symbol length obtained from the received signal includes two continuous spreading symbol periods from the received signal, and the obtained data length of the spreading symbol length is 2N, so that the maximum value search is performed on the continuous 2N correlation values to obtain the correlation peak value, thereby avoiding false detection of the pseudo correlation peak value when the carrier-to-noise ratio is low, i.e., the noise interference is large, and improving the reliability of the address code detection.
And S102, performing matched filtering on the data by adopting different preset matched filters respectively to obtain the first correlation value and the second correlation value.
Based on the step S101, the data obtained from the node is matched and filtered by using different preset matched filters to obtain a first correlation value and a second correlation value, where the data obtained from the node is matched and filtered by using the preset matched filters, for example, the obtained data is input into a matched filter with a local sequence of C1 and matched filters MF2, MF1, and MF2 with a local sequence of C2, and the data is received and then is subjected to detection processing, where the matched filters may use a known single correlator, a correlator array, a time-domain matched filter, or the like, which is not limited in this embodiment. However, after receiving the data, MF1 and MF2 perform detection processing, and then output correlation values corresponding to the data one by one, for example, if there are 2N acquired data, the first correlation values output by MF1 are also 2N, and the second correlation values output by MF2 are also 2N.
S103, comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value respectively to obtain a comparison result.
In this step, based on the first correlation value and the second correlation value obtained from the node in the step S102, the slave node needs to determine a maximum value from the first correlation value and a maximum value from the second correlation value, and then compares the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value to obtain a comparison result. The preset threshold is a value meeting the specification, which is made by the user according to experience or actual requirements, and the specific value of the preset threshold is not limited in this embodiment. The obtained comparison result may be that both the maximum value of the first correlation value and the maximum value of the second correlation value are greater than the preset threshold, may also be both smaller than the preset threshold, and may also be one greater than the preset threshold and one smaller than the preset threshold, which is not limited in this embodiment.
And S104, if the address code matching is successful in the comparison result, performing compensation synchronization on the received signal.
In this step, based on the step S103, after the slave node compares the maximum value of the first correlation value and the maximum value of the second correlation value with the preset threshold, if the comparison result indicates that both the maximum value of the first correlation value and the maximum value of the second correlation value are greater than the preset threshold, it indicates that the address code matching is successful, where the address code matching indicates that the address of the slave node matches the address code carried in the wake-up code packet of the received signal. Illustratively, the slave node performs the compensated synchronization of the received signal after the address code matching is successful by calculating the carrier frequency offset and the symbol synchronization offset and then performing the compensation using the calculated offsets, i.e., the carrier frequency offset synchronization and the symbol time are synchronized. It should be noted that, generally, after address code matching is successful and compensation synchronization is performed, the slave node maintains a receiving state, receives data sent by the master node until receiving is completed, and then goes to sleep, but if address codes at the beginning are not successfully matched, the slave node immediately goes to sleep.
In the signal synchronization method provided by this embodiment, the slave node obtains a first correlation value and a second correlation value after data acquired from a received signal passes through different filters, then compares a maximum value of the first correlation value and a maximum value of the second correlation value with a preset threshold value, and performs compensation synchronization on the received signal when the address code matching is successful as a comparison result, because the acquired data includes two consecutive spread spectrum symbol periods, when determining a maximum value from the first and second correlation values, maximum value search is performed on 2N consecutive correlation values, the determined maximum value is also a real peak value, thereby avoiding false correlation peak detection when a low carrier-to-noise ratio (i.e., noise interference) is large, improving reliability of address code detection, and after the address code matching is successful, performing compensation through calculated carrier frequency deviation and symbol synchronization deviation, fast and reliable synchronization of receiver (slave node) signals in a wireless communication system can be ensured.
In the above embodiment, the preset threshold includes two cases, one case includes only one threshold, and the other case includes two thresholds, that is, a high threshold and a low threshold, and then the specific process of comparing the maximum value of the first correlation value and the maximum value of the second correlation value with the preset threshold under the two different cases and obtaining the comparison result will be described in detail through the two embodiments.
In an embodiment, if the preset threshold includes a comparison threshold, the embodiment of the present application further provides a signal synchronization method, as shown in fig. 3, where the step S103 includes:
s201, determining whether the maximum value of the first correlation value and the maximum value of the second correlation value are both greater than the comparison threshold value, if yes, performing step S202, and if no, performing step S203.
In this embodiment, the slave node first obtains the maximum value from the first correlation value and the second correlation value, respectively, where the obtaining manner may be that the slave node inputs the first correlation value and the second correlation value into a maximum value searcher, and the maximum value searcher directly outputs the maximum value of the first correlation value and the maximum value of the second correlation value.
In practical applications, the slave node may compare the maximum value of the first correlation value and the maximum value of the second correlation value with the comparison threshold value, respectively, by comparing a difference value or an entropy value between the maximum value of the first correlation value and the comparison threshold value, and then determining whether both the maximum value of the first correlation value and the maximum value of the second correlation value are greater than the comparison threshold value according to the difference value or the entropy value, if so, executing step S202, and if not, executing step S203. For example, assuming that the maximum value of the first correlation value is Peak1 and the maximum value of the second correlation value is Peak2, and the comparison threshold value is TH, if Peak1> TH and Peak2> TH, the address code matching is considered to be successful. Otherwise, the address code matching is considered unsuccessful.
S202, the address code matching is successful according to the comparison result;
in this step, if the comparison result is that both the maximum value of the first correlation value and the maximum value of the second correlation value are greater than the comparison threshold value, the comparison result is that the address code matching is successful.
S203, the comparison result is that the address code matching is unsuccessful.
In this step, if the comparison result is that the maximum value of the first correlation value and the maximum value of the second correlation value are not both greater than the comparison threshold value, the comparison result is that the address code matching is unsuccessful.
In the signal synchronization method provided by this embodiment, after the slave node compares the maximum value of the first correlation value and the maximum value of the second correlation value with the preset threshold value, the magnitude relationship between the two is determined, and whether address code matching is successful is further determined according to the determined magnitude relationship, so that fast address matching is implemented, and average power consumption is reduced.
In another embodiment, if the preset threshold includes a high threshold and a low threshold, the present application further provides a signal synchronization method, as shown in fig. 4, where the step S103 includes:
s301, comparing the maximum value of the first correlation value and the maximum value of the second correlation value with the high threshold value, respectively.
In this embodiment, as in the step S201, the slave node determines the maximum value of the first correlation value and the maximum value of the second correlation value, and then compares the maximum value of the first correlation value and the maximum value of the second correlation value with the high threshold value, respectively.
S302, if the maximum value of the first correlation value and the maximum value of the second correlation value are both larger than the high threshold value; the comparison result is that the address code matching is successful.
Based on the above step S301, after the slave node compares the maximum value of the first correlation value and the maximum value of the second correlation value with the high threshold, if both the maximum value of the first correlation value and the maximum value of the second correlation value are greater than the high threshold, it may be determined that the address code matching is successful as a comparison result.
S303, if the maximum value of the first correlation value and the maximum value of the second correlation value are both smaller than the high threshold, the comparison result is that the address code matching is unsuccessful.
In this step, similarly, if both the maximum value of the first correlation value and the maximum value of the second correlation value are smaller than the high threshold, it may be determined that the comparison result is that the address code matching is unsuccessful.
S304, if the maximum value of the first correlation value is smaller than the high threshold value and the maximum value of the second correlation value is larger than the high threshold value, or the maximum value of the first correlation value is larger than the high threshold value and the maximum value of the second correlation value is smaller than the high threshold value, determining the comparison result according to the rechecking result.
In this step, after the maximum value of the first correlation value and the maximum value of the second correlation value are compared with the high threshold value, the comparison result is that one maximum value is greater than the high threshold value, and the other maximum value is less than the high threshold value, specifically, the maximum value of the first correlation value is less than the high threshold value, and the maximum value of the second correlation value is greater than the high threshold value, or the maximum value of the first correlation value is greater than the high threshold value, and the maximum value of the second correlation value is less than the high threshold value, in this case, the signal-to-noise ratio of the received signal may be very low, and the peak value (maximum value) of the correlation value may also need to be redetected as it decreases, and then the slave node determines the comparison result according to the redetection result, so as to further determine whether the address code matching is successful through the redetection flow, and ensure the correctness of the address code detection.
In the signal synchronization method provided by this embodiment, after the slave node compares the maximum value of the first correlation value and the maximum value of the second correlation value with the high threshold value, a specific comparison result is determined according to the comparison result, and if the specific comparison result cannot be obtained from the comparison result determined by the slave node, whether address code matching is successful is further determined according to the rechecking process, so that the reliability of address code detection is greatly improved.
As for the specific process that the slave node needs to determine whether the current data meets the re-inspection condition before the slave node determines the comparison result according to the re-inspection result, in an embodiment, the present application further provides a signal synchronization method, which relates to a specific process that the slave node needs to determine whether the current data meets the re-inspection condition before the re-inspection, as shown in fig. 5, the method further includes:
s401, judging whether the current data meets the preset rechecking condition, if so, executing the step S402, and if not, executing the step S403.
In this embodiment, if in the step S304, the comparison result of the slave node is that one maximum value is greater than the high threshold value and the other maximum value is less than the high threshold value, that is, the maximum value of the first correlation value is less than the high threshold value and the maximum value of the second correlation value is greater than the high threshold value, or the maximum value of the first correlation value is greater than the high threshold value and the maximum value of the second correlation value is less than the high threshold value, the slave node continuously determines whether the current data meets a preset review condition, that is, determines whether the data and other data (for example, the number of review times) that are less than the high threshold value meet the preset review condition, where the preset review condition is a condition that is preset by a user according to an actual situation, and the specific content of the condition is not limited in this embodiment. If the determination result is that the current data meets the predetermined review condition, step S402 is executed, and if the determination result is that the current data does not meet the predetermined review condition, step S403 is executed.
S402, entering a rechecking process.
In this step, in step S401, if the current data determined by the slave node meets the preset re-inspection condition, the slave node enters a re-inspection process, where the re-inspection process indicates that the slave node needs to re-inspect the data (the first correlation value or the second correlation value) smaller than the high threshold value to verify whether the conclusion smaller than the high threshold value is correct, it can be understood that the signal is in a flowing state, and when the re-inspection is performed, the slave node re-acquires the data from the next received signal to perform inspection.
Optionally, as shown in fig. 6, if the current data meets the review condition, one implementation manner of entering the review process includes:
and S501, if the current data meet the re-inspection condition, acquiring data in the received signal of the next period.
In S401, on the premise that it is determined that the current data meets the re-inspection condition, the slave node re-acquires data in the received signal of the next period, for example, if the maximum value of the first correlation value is smaller than the high threshold and the maximum value of the second correlation value is larger than the high threshold, the slave node only needs to re-acquire new data with a data length of 2N from the received signal of the next period and output a new first correlation value through the filter 1, and similarly, if the maximum value of the first correlation value is larger than the high threshold and the maximum value of the second correlation value is smaller than the high threshold, the slave node re-acquires new data with a data length of 2N from the received signal of the next period and outputs a new second correlation value through the filter 2.
S502, according to the data in the received signal of the next period, the address code matching result is determined again.
In this step, based on the data of the received signal of the next cycle acquired from the node again in step S501, the address code matching result is determined again, where the manner of determining the address code matching result again from the node is consistent with the foregoing processing procedure for acquiring data, for example: firstly, filtering the newly acquired data by a filter MF1 or MF2 to obtain a new first correlation value or a new second correlation value, then determining a maximum value from the new first correlation value or the new second correlation value, comparing the determined maximum value with a high threshold value, and finally re-determining the address code matching result according to the comparison result. It should be noted that, because the retest times set by the wireless communication system need to be satisfied when determining whether retest is needed, in order to ensure that data can be relied on in the next retest, after the current retest is performed, the retest times counter in the wireless communication system needs to be updated.
And S403, entering a sleep state.
In this step, in step S401, based on that the current data determined by the slave node does not satisfy the preset rechecking condition, the slave node enters a sleep state, it needs to be described that the slave node is generally in a cycle state of receiving-sleep-receiving-sleep, that is, a data receiving state and a sleep state, the slave node is switched from the sleep state to the data receiving state, that is, the master node needs to send a wake-up code packet to wake up the slave node, in the embodiment of the present application, when the slave node wakes up, it needs to ensure that an address code in the wake-up code packet sent by the master node is successfully matched with an address of a target slave node, after the address matching is successful, the slave node starts to maintain the wake-up state to receive data sent.
In the signal synchronization method provided in this embodiment, if the slave node compares the maximum value of the first correlation value and the maximum value of the second correlation value with the high threshold value, and the comparison result indicates that one maximum value is greater than the high threshold value and the other maximum value is less than the high threshold value, the slave node determines whether the current data meets a preset re-inspection condition, and performs re-inspection on the first correlation value or the first correlation value that is less than the high threshold value under the condition that the re-inspection is met, and if the re-inspection condition is not met, the slave node directly enters a sleep state, so that a next segment of received signals is taken, and the maximum value of the correlation value is re-inspected, which can improve the reliability of address code detection.
In an embodiment, as shown in fig. 7, one implementation manner of the "determining whether the current data satisfies the review condition" in the step S401 includes:
s601, if the maximum value of the first correlation value is smaller than the high threshold and the maximum value of the second correlation value is larger than the high threshold, determining whether the maximum value of the first correlation value is larger than the low threshold.
In this embodiment, if the maximum value of the first correlation value is smaller than the high threshold value and the maximum value of the second correlation value is larger than the high threshold value, the slave node determines whether the maximum value of the first correlation value is larger than a low threshold value, where the low threshold value is a minimum threshold value that may exist in the maximum value of the correlation value, which is set by a user according to experience or an actual situation, and it can be understood that the low threshold value is smaller than the high threshold value. For example, if the maximum value of the first correlation value is Peak1, the maximum value of the second correlation value is Peak2, the upper threshold value is TH _ High, and the preset lower threshold value is TH _ Low, the slave node determines whether Peak1 is greater than TH _ Low if Peak1 is < TH _ High and Peak2> TH _ High.
S602, if the maximum value of the first correlation value is greater than the lower threshold value, determining whether the current checking frequency is less than a preset threshold value.
In this step, based on the step S601, if the slave node determines that the maximum value of the first correlation value is greater than the Low threshold value, that is, Peak1> TH _ Low, the slave node determines whether the current number of checks, which represents the total number of checks that the slave node has performed currently, is less than a preset threshold value, for example, the number of times may be recorded in a counter of the wireless communication system; the preset threshold value represents a preset maximum value of the number of times that the slave node can perform the recheck in the wireless communication system, for example: the current checking frequency on the counter is represented by cnt _ det, the critical value is represented by num _ det, the value of num _ det is set to be 3, the cnt _ det < num _ det is ensured, and the current checking frequency is determined to be smaller than the preset critical value.
S603, if the current checking times are smaller than the preset critical value, the current data meet the re-checking condition.
Based on the above S602, if the current number of times of verification determined by the slave node is smaller than the preset threshold value, and the maximum value of the first correlation value before combining is greater than the lower threshold value, it may be determined that the current data satisfies the review condition.
In another embodiment, as shown in fig. 8, another implementation manner of the "determining whether the current data satisfies the review condition" in the step S401 includes:
s701, if the maximum value of the first correlation value is larger than the high threshold value and the maximum value of the second correlation value is smaller than the high threshold value, judging whether the maximum value of the second correlation value is larger than the low threshold value.
If the maximum value of the first correlation value is greater than the High threshold value and the maximum value of the second correlation value is less than the High threshold value, the slave node determines whether the maximum value of the second correlation value is greater than the Low threshold value, for example, if the maximum value of the first correlation value is Peak1, the maximum value of the second correlation value is Pea k2, the High threshold value is TH _ High, and the preset Low threshold value is TH _ Low, the slave node determines whether Peak2 is greater than TH _ Low if Peak1> TH _ High and Peak2< TH _ High.
S702, if the maximum value of the second correlation value is greater than the lower threshold value, determining whether the current checking frequency is less than a preset threshold value.
Similarly, if the present step is consistent with the method of S602, based on the step S701, if the slave node determines that the maximum value of the second correlation value is greater than the lower threshold value, that is, Peak2> TH _ Low, the slave node determines whether the current number of checks is less than a preset threshold value, for example: the current checking frequency on the counter is represented by cnt _ det, the critical value is represented by num _ det, the value of num _ det is set to be 3, the cnt _ det < num _ det is ensured, and the current checking frequency is determined to be smaller than the preset critical value.
And S703, if the current checking times are smaller than the preset critical value, the current data meet the re-checking condition.
In this step, if the current number of times of inspection determined by the slave node is smaller than the preset threshold value, in combination with the previous second correlation value being greater than the lower threshold value, it may be determined that the current data satisfies the re-inspection condition.
In the signal synchronization method provided in this embodiment, under the condition that the maximum value of the first correlation value is smaller than the high threshold and the maximum value of the second correlation value is larger than the high threshold, and the condition that the maximum value of the first correlation value is larger than the high threshold and the maximum value of the second correlation value is smaller than the high threshold, whether current data meets a preset re-inspection condition is determined in detail, so that reliability of address code detection can be improved by comparing the maximum value of the correlation value with two thresholds and taking down a section of signal for re-inspection when the maximum value is smaller than the high threshold but larger than the low threshold.
The following describes in detail a process of performing the compensation synchronization on the received signal by the slave node after the address code matching is successful by using an embodiment, and in an embodiment, as shown in fig. 9, the step S104 includes:
s801, obtaining a serial number corresponding to a maximum value of the first correlation value and a maximum value of the second correlation value, and calculating the carrier frequency offset and the symbol synchronization offset.
In this embodiment, the slave node first obtains the sequence numbers corresponding to the maximum value of the first correlation value and the maximum value of the second correlation value, where the sequence numbers indicate sequence numbers when the filters MF1 and MF2 output correlation values, where the slave node can record the sequence numbers corresponding to the respective maximum values when determining the maximum value of the first correlation value and the maximum value of the second correlation value, and in this step, the slave node can be directly used when it is needed. And calculating carrier frequency deviation and symbol synchronization deviation by the slave node based on the serial numbers corresponding to the two maximum values, wherein the carrier frequency deviation is caused by clock deviation of the master node and the slave node, Doppler deviation in the wireless transmission process and other factors. For example, the carrier frequency offset (fe _ est) and the symbol synchronization offset (sp _ est) may be calculated from the node by substituting the following formula (2) into the following formula (1) to obtain the carrier frequency offset and substituting the formula (2) into the formula (3) to obtain the symbol synchronization offset.
idx_fe＝(idx1％N)-(idx2％N) (2)
Wherein, in the above formula, N represents the period N of the received signal; rc is a spread symbol rate, which is a parameter that has been set when the wireless communication system is set up; the% represents a modulo operation; idx1 and idx2 are numbers corresponding to the maximum value of the first correlation value and the maximum value of the second correlation value.
S702, compensating and synchronizing the received signal according to the carrier frequency deviation and the symbol synchronization deviation.
Based on the carrier frequency offset and the symbol synchronization offset calculated in step S701, the slave node directly compensates the carrier frequency offset and the symbol synchronization offset, that is, compensates and synchronizes the received signal with the slave node.
In the signal synchronization method provided by this embodiment, the slave node calculates the carrier frequency offset and the symbol synchronization offset according to the sequence number corresponding to the maximum value of the first correlation value and the maximum value of the second correlation value, and compensates using the calculated carrier frequency offset and symbol synchronization offset, so as to effectively solve the problem of fast and reliable synchronization of the receiver (slave node) signal in the wireless communication system.
It should be understood that although the various steps in the flow charts of fig. 2-9 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-9 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 10, there is provided a signal synchronizing apparatus including: an obtaining module 10, a filtering module 11, a comparing module 12 and a compensating module 13, wherein:
an obtaining module 10, configured to obtain, from a received signal, data with a spreading symbol length including two consecutive spreading symbol periods;
the filtering module 11 is configured to perform matched filtering on the data by using different preset matched filters, so as to obtain the first correlation value and the second correlation value;
a comparing module 12, configured to compare a maximum value of the first correlation value and a maximum value of the second correlation value with a preset threshold value, respectively, to obtain a comparison result;
and the compensation module 13 is configured to perform compensation synchronization on the received signal if the comparison result is that the address codes are successfully matched.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 11, there is provided a signal synchronization apparatus, wherein the comparing module 12 includes a judging unit 121, a first determining unit 122 and a second determining unit 123, wherein:
a determining unit 121, configured to determine whether a maximum value of the first correlation value and a maximum value of the second correlation value are both greater than the comparison threshold value;
a first determining unit 122, configured to determine that the comparison result is that the address code matching is successful;
a second determining unit 123, configured to determine that the comparison result is that the address code matching is unsuccessful.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 12, there is provided a signal synchronization apparatus, the comparing module 12 further includes a comparing unit 124, a third determining unit 125, a fourth determining unit 126, and a fifth determining unit 127, wherein:
a comparing unit 124, configured to compare a maximum value of the first correlation value and a maximum value of the second correlation value with the high threshold value, respectively;
a third determining unit 125, configured to determine whether a maximum value of the first correlation value and a maximum value of the second correlation value are both greater than the upper threshold; the comparison result is that the address code is successfully matched;
a fourth determining unit 126, configured to determine that the comparison result is that the address code matching is unsuccessful if the maximum value of the first correlation value and the maximum value of the second correlation value are both smaller than the high threshold;
a fifth determining unit 127, if the maximum value of the first correlation value is smaller than the high threshold and the maximum value of the second correlation value is larger than the high threshold, or if the maximum value of the first correlation value is larger than the high threshold and the maximum value of the second correlation value is smaller than the high threshold, determining the comparison result according to the review result.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 13, there is provided a signal synchronization apparatus, further comprising: a judging module 14, a rechecking module 15 and a dormancy module 16;
the judging module 14 is configured to judge whether the current data meets a preset rechecking condition;
the rechecking module 15 is used for entering a rechecking process if the current data meets the rechecking condition;
and the dormancy module 16 is configured to enter a dormant state if the current data does not meet the review condition.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 14, there is provided a signal synchronization apparatus, where the determining module 14 includes: a first judgment unit 141, a first condition determination unit 142, and a first result determination unit 143; wherein,
a first determining unit 141, configured to determine whether the maximum value of the first correlation value is greater than the low threshold value if the maximum value of the first correlation value is less than the high threshold value and the maximum value of the second correlation value is greater than the high threshold value;
a first condition determining unit 142, configured to determine whether the current checking frequency is smaller than a preset critical value if the maximum value of the first correlation value is greater than the lower threshold value;
a first result determining unit 143, configured to determine that the current data meets the re-inspection condition if the current number of times of inspection is smaller than the preset critical value.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 15, there is provided a signal synchronization apparatus, wherein the determining module 14 includes: a second judging unit 144, a second condition determining unit 145, and a second result determining unit 146, wherein:
a second determining unit 144, configured to determine whether the maximum value of the second correlation value is greater than the low threshold value if the maximum value of the first correlation value is greater than the high threshold value and the maximum value of the second correlation value is less than the high threshold value;
a second condition determining unit 145, configured to determine whether the current number of times of inspection is smaller than a preset threshold value if the maximum value of the second correlation value is greater than the lower threshold value;
a second result determining unit 146, configured to determine that the current data meets the re-inspection condition if the current number of times of inspection is smaller than the preset critical value.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 16, there is provided a signal synchronization apparatus, wherein the review module 15 includes: an acquisition unit 151 and a third result determination unit 152; wherein,
an obtaining unit 151, configured to obtain data in a received signal of a next cycle if the current data meets a re-inspection condition;
a third result determining unit 152, configured to re-determine the address code matching result according to the data in the received signal of the next cycle.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
In one embodiment, as shown in fig. 17, there is provided a signal synchronization apparatus, wherein the compensation module 13 includes: a calculation unit 131 and a compensation unit 132; wherein,
a calculating unit 131, configured to obtain a sequence number corresponding to a maximum value of the first correlation value and a maximum value of the second correlation value, and calculate the carrier frequency offset and the symbol synchronization offset;
a compensating unit 132, configured to perform compensation synchronization on the received signal according to the carrier frequency offset and the symbol synchronization offset.
The signal synchronization apparatus provided in the foregoing embodiment has the similar implementation principle and technical effect as those of the foregoing method embodiment, and is not described herein again.
For the specific definition of the signal synchronization apparatus, reference may be made to the above definition of the signal synchronization method, which is not described herein again. The modules in the signal synchronization device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 18. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a signal synchronization method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 18 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring data with a spread spectrum symbol length comprising two continuous spread spectrum symbol periods from a received signal;
respectively adopting different preset matched filters to carry out matched filtering on the data to obtain the first correlation value and the second correlation value;
respectively comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value to obtain a comparison result;
and if the comparison result is that the address codes are successfully matched, performing compensation synchronization on the received signals.
The implementation principle and technical effect of the computer device provided by the above embodiment are similar to those of the above method embodiment, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring data with a spread spectrum symbol length comprising two continuous spread spectrum symbol periods from a received signal;
respectively adopting different preset matched filters to carry out matched filtering on the data to obtain the first correlation value and the second correlation value;
respectively comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value to obtain a comparison result;
and if the comparison result is that the address codes are successfully matched, performing compensation synchronization on the received signals.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A method for signal synchronization, the method comprising:
acquiring data with a spread spectrum symbol length comprising two continuous spread spectrum symbol periods from a received signal;
respectively adopting different preset matched filters to carry out matched filtering on the data to obtain the first correlation value and the second correlation value;
respectively comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value to obtain a comparison result;
and if the comparison result is that the address codes are successfully matched, performing compensation synchronization on the received signals.
2. The method of claim 1 wherein if the predetermined threshold comprises a comparison threshold; comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value respectively to obtain a comparison result, including:
judging whether the maximum value of the first correlation value and the maximum value of the second correlation value are both larger than the comparison threshold value;
if yes, the comparison result is that the address code matching is successful;
if not, the comparison result is that the address code matching is unsuccessful.
3. The method of claim 1, wherein if the predetermined threshold comprises a high threshold and a low threshold; comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value respectively to obtain a comparison result, including:
comparing the maximum value of the first correlation value and the maximum value of the second correlation value with the high threshold value, respectively;
if the maximum value of the first correlation value and the maximum value of the second correlation value are both greater than the high threshold value; the comparison result is that the address code is successfully matched;
if the maximum value of the first correlation value and the maximum value of the second correlation value are both smaller than the high threshold value, the comparison result is that the address code matching is unsuccessful;
and if the maximum value of the first correlation value is smaller than the high threshold value and the maximum value of the second correlation value is larger than the high threshold value, or the maximum value of the first correlation value is larger than the high threshold value and the maximum value of the second correlation value is smaller than the high threshold value, determining the comparison result according to the rechecking result.
4. The method of claim 3, wherein prior to said determining the comparison result from the review result, the method comprises:
judging whether the current data meet a preset rechecking condition or not;
if the current data meet the re-inspection condition, entering a re-inspection process;
and if the current data does not meet the re-inspection condition, entering a dormant state.
5. The method of claim 4, wherein the determining whether the current data meets the review condition comprises:
if the maximum value of the first correlation value is smaller than the high threshold value and the maximum value of the second correlation value is larger than the high threshold value, judging whether the maximum value of the first correlation value is larger than the low threshold value;
if the maximum value of the first correlation value is larger than the lower threshold value, determining whether the current checking times is smaller than a preset critical value;
and if the current detection times are smaller than the preset critical value, the current data meet the re-inspection condition.
6. The method of claim 4, wherein the determining whether the current data meets the review condition further comprises:
if the maximum value of the first correlation value is greater than the high threshold value and the maximum value of the second correlation value is less than the high threshold value, judging whether the maximum value of the second correlation value is greater than the low threshold value;
if the maximum value of the second correlation value is larger than the lower threshold value, determining whether the current checking times is smaller than a preset critical value;
and if the current detection times are smaller than the preset critical value, the current data meet the re-inspection condition.
7. The method according to any one of claims 4 to 6, wherein entering a review process if the current data satisfies a review condition comprises:
if the current data meet the re-inspection condition, acquiring data in a received signal of the next period;
and re-determining the address code matching result according to the data in the received signal of the next period.
8. The method of claim 1, wherein performing complementary synchronization on the received signal if the comparison result is successful address code matching comprises:
acquiring a serial number corresponding to the maximum value of the first correlation value and the maximum value of the second correlation value, and calculating the carrier frequency deviation and the symbol synchronization deviation;
and compensating and synchronizing the received signals according to the carrier frequency deviation and the symbol synchronization deviation.
9. A signal synchronization apparatus, the apparatus comprising:
an obtaining module, configured to obtain data with a spreading symbol length including two consecutive spreading symbol periods from a received signal;
the filtering module is used for respectively adopting different preset matchers to carry out matched filtering on the data to obtain the first correlation value and the second correlation value;
the comparison module is used for comparing the maximum value of the first correlation value and the maximum value of the second correlation value with a preset threshold value respectively to obtain a comparison result;
and the compensation module is used for performing compensation synchronization on the received signal if the comparison result is that the address codes are successfully matched.
10. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 8 when executing the computer program.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 8.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111222871A (en) * | 2019-12-25 | 2020-06-02 | 广东金赋科技股份有限公司 | Operation and maintenance system and method of multi-region self-service tax handling terminal |
| CN114760319A (en) * | 2020-12-28 | 2022-07-15 | 武汉联影智融医疗科技有限公司 | HBC data synchronization method, computer equipment and storage medium |
| CN116319712A (en) * | 2023-05-23 | 2023-06-23 | 北京智芯半导体科技有限公司 | Wireless upgrading method and device for slave nodes of power equipment body area network |
| CN117375768A (en) * | 2023-10-31 | 2024-01-09 | 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所) | Wireless communication rate self-adaptive transmission method and application |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1684456A (en) * | 2004-04-13 | 2005-10-19 | 冲电气工业株式会社 | Synchronous detector and method therefor |
| CN101902425A (en) * | 2009-05-27 | 2010-12-01 | 北京威讯紫晶科技有限公司 | Method for synchronizing time and carrier frequency in short-range wireless network |
| CN102695263A (en) * | 2011-03-23 | 2012-09-26 | 上海无线通信研究中心 | Method for robust downlink timing synchronization of LTE system |
| CN103391182A (en) * | 2013-06-27 | 2013-11-13 | 华为技术有限公司 | Frame detection method and device |
| CN104125190A (en) * | 2014-08-18 | 2014-10-29 | 西安电子科技大学 | OFDM (orthogonal frequency division multiplexing) system symbol timing synchronization realizing method suitable for low-signal-to-noise-ratio channel environments |
| JP2014220638A (en) * | 2013-05-08 | 2014-11-20 | ヤマハ株式会社 | Correlator and program |
| CN105830409A (en) * | 2014-05-04 | 2016-08-03 | 华为技术有限公司 | Method and apparatus for frame synchronization |
-
2019
- 2019-02-02 CN CN201910107878.8A patent/CN109818644B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1684456A (en) * | 2004-04-13 | 2005-10-19 | 冲电气工业株式会社 | Synchronous detector and method therefor |
| CN101902425A (en) * | 2009-05-27 | 2010-12-01 | 北京威讯紫晶科技有限公司 | Method for synchronizing time and carrier frequency in short-range wireless network |
| CN102695263A (en) * | 2011-03-23 | 2012-09-26 | 上海无线通信研究中心 | Method for robust downlink timing synchronization of LTE system |
| JP2014220638A (en) * | 2013-05-08 | 2014-11-20 | ヤマハ株式会社 | Correlator and program |
| CN103391182A (en) * | 2013-06-27 | 2013-11-13 | 华为技术有限公司 | Frame detection method and device |
| CN105830409A (en) * | 2014-05-04 | 2016-08-03 | 华为技术有限公司 | Method and apparatus for frame synchronization |
| CN104125190A (en) * | 2014-08-18 | 2014-10-29 | 西安电子科技大学 | OFDM (orthogonal frequency division multiplexing) system symbol timing synchronization realizing method suitable for low-signal-to-noise-ratio channel environments |
Non-Patent Citations (1)
| Title |
|---|
| 杜洋等: "采用多相关峰值的PN码频域匹配滤波捕获实现方法", 《信号处理》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111222871A (en) * | 2019-12-25 | 2020-06-02 | 广东金赋科技股份有限公司 | Operation and maintenance system and method of multi-region self-service tax handling terminal |
| CN111222871B (en) * | 2019-12-25 | 2023-10-17 | 广东金赋科技股份有限公司 | Operation and maintenance system and method for multi-region self-service tax terminal |
| CN114760319A (en) * | 2020-12-28 | 2022-07-15 | 武汉联影智融医疗科技有限公司 | HBC data synchronization method, computer equipment and storage medium |
| CN114760319B (en) * | 2020-12-28 | 2023-05-30 | 武汉联影智融医疗科技有限公司 | HBC data synchronization method, computer device and storage medium |
| CN116319712A (en) * | 2023-05-23 | 2023-06-23 | 北京智芯半导体科技有限公司 | Wireless upgrading method and device for slave nodes of power equipment body area network |
| CN116319712B (en) * | 2023-05-23 | 2023-08-18 | 北京智芯半导体科技有限公司 | Wireless upgrading method and device for slave nodes of power equipment body area network |
| CN117375768A (en) * | 2023-10-31 | 2024-01-09 | 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所) | Wireless communication rate self-adaptive transmission method and application |
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