CN112118622A - WCDMA uplink synchronous position detection method and device - Google Patents
WCDMA uplink synchronous position detection method and device Download PDFInfo
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Abstract
The embodiment of the invention provides a method and a device for detecting a WCDMA uplink synchronous position, wherein the method comprises the following steps: acquiring an uplink scrambling code corresponding to an uplink signal; based on the uplink scrambling code, performing sliding correlation on each chip in the uplink signal to obtain a correlation value of each chip; acquiring the correlation power value of any chip based on the correlation value of the chip; and acquiring an uplink synchronization position in the uplink signal based on the correlation power value of each chip. The method and the device provided by the embodiment of the invention realize accurate synchronous position detection, reduce the calculation burden of subsequent synchronous detection and improve the calculation efficiency of the subsequent synchronous detection by performing sliding correlation on the uplink signal based on the correlation characteristic of the uplink scrambling code.
Description
Technical Field
The present invention relates to the field of mobile communication technologies, and in particular, to a method and an apparatus for detecting a WCDMA uplink synchronization position.
Background
WCDMA (Wideband Code Division Multiple Access) has many advantages such as high data rate, good security, strong anti-interference capability, and so on, and thus becomes the 3G (3rd-Generation) mobile communication technology which is the most widely used worldwide.
Fig. 1 is a schematic diagram of a WCDMA uplink signal in the prior art, and as shown in fig. 1, in a process of performing WCDMA uplink synchronous position detection, in an uplink signal sent by a terminal, an a stage is low noise, a b stage is steep signal climbing, a c stage is slow signal climbing, and a d stage is signal stabilization. As can be seen from fig. 1, there is a climbing stage in the uplink signal, and due to the characteristic that the WCDMA uplink signal jumps up and down, it is difficult to obtain an accurate synchronization position, i.e., a rising edge position, when the non-signaling comprehensive tester detects the synchronization position of the uplink signal. Generally, the detected synchronization position is at the stage c indicated by the arrow in fig. 1, while the actually accurate synchronization position should be at the stage b, the data deviation is large, the back end has to adopt a large synchronization calculation window for synchronization detection, the calculation load is increased, and the processing time is prolonged.
In order to reduce the influence of the waveform fluctuation of the uplink signal on the detection of the synchronization position, a moving average process is usually performed in the detection stage of the synchronization position to reduce the fluctuation amplitude of the uplink signal and ensure the accuracy of the synchronization calculation.
When the moving average method is applied to synchronous detection of WCDMA uplink signals of the same user terminal, the obtained synchronous position is relatively stable, but when synchronous detection is performed on WCDMA uplink signals of different user terminals, the obtained synchronous position has a large difference, the signal fluctuation amplitude cannot be effectively smoothed, and particularly when the signal quality is poor, the detected synchronous position has larger deviation, and accurate synchronous position detection cannot be realized.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting a WCDMA uplink synchronous position, which are used for solving the problems of large deviation and inaccuracy of the detection of the existing WCDMA uplink synchronous position.
In a first aspect, an embodiment of the present invention provides a method for detecting a WCDMA uplink synchronization position, including:
acquiring an uplink scrambling code corresponding to an uplink signal;
based on the uplink scrambling code, performing sliding correlation on each chip in the uplink signal to obtain a correlation value of each chip;
acquiring the correlation power value of any chip based on the correlation value of the chip;
and acquiring an uplink synchronization position in the uplink signal based on the correlation power value of each chip.
Preferably, the performing sliding correlation on each chip in the uplink signal based on the uplink scrambling code to obtain a correlation value of each chip specifically includes:
acquiring a relevant segment corresponding to any one of the chips; the relevant segment corresponding to any chip is a segment of signal which takes any chip as a first chip and is as long as the uplink scrambling code in the uplink signal;
and performing conjugate multiplication accumulation on the correlation section and the uplink scrambling code to obtain a correlation value of any chip.
Preferably, the obtaining an uplink synchronization position in the uplink signal based on the correlation power value of each chip specifically includes:
acquiring a peak detection result of any segmented signal of the uplink signal based on the correlation power value of each chip in the segmented signal; the segmented signals are obtained by dividing the uplink signals;
and if the peak value detection result indicates that an effective peak value exists, taking the position corresponding to the chip with the highest correlation power value in any segmented signal as the uplink synchronization position.
Preferably, the obtaining a peak detection result of any segmented signal based on the correlation power value of each chip in any segmented signal of the uplink signal specifically includes:
acquiring a peak-to-average ratio of any segmented signal based on the correlation power value of each chip in any segmented signal of the uplink signal;
if the peak-to-average ratio of any segmented signal is greater than or equal to a preset peak-to-average ratio threshold value, determining that the peak detection result is an effective peak value; otherwise, confirming that the peak detection result is that no effective peak exists.
Preferably, the obtaining a peak detection result of any segmented signal of the uplink signal based on the correlation power value of each chip in the segmented signal further includes:
acquiring a preset segmentation length;
and taking the first chip of the uplink signal as a starting point, and dividing the uplink signal once every preset segment length to obtain a plurality of segment signals.
Preferably, the obtaining the correlation power value of any chip based on the correlation value of any chip specifically includes:
and taking the square of the correlation value of any chip as the correlation power value of any chip.
Preferably, the acquiring an uplink scrambling code corresponding to an uplink signal further includes:
receiving an uplink signal, performing trigger detection on the uplink signal, and confirming that the uplink signal contains a synchronous trigger signal.
In a second aspect, an embodiment of the present invention provides a WCDMA uplink synchronization position detection apparatus, including:
a scrambling code obtaining unit, configured to obtain an uplink scrambling code corresponding to the uplink signal;
a sliding correlation unit, configured to perform sliding correlation on each chip in the uplink signal based on the uplink scrambling code, and obtain a correlation value of each chip;
a correlation power unit, configured to obtain a correlation power value of any one chip based on a correlation value of the any one chip;
and a synchronization detection unit, configured to obtain an uplink synchronization position in the uplink signal based on the correlation power value of each chip.
In a third aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a bus, where the processor and the communication interface, the memory complete communication with each other through the bus, and the processor may call a logic instruction in the memory to perform the steps of the method provided in the first aspect.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method as provided in the first aspect.
The method and the device for detecting the uplink synchronous position of the WCDMA provided by the embodiment of the invention realize accurate synchronous position detection, reduce the calculation burden of subsequent synchronous detection and improve the calculation efficiency of the subsequent synchronous detection by performing sliding correlation on uplink signals based on the correlation characteristic of uplink scrambling codes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a diagram illustrating a WCDMA uplink signal in the prior art;
fig. 2 is a schematic flow chart of a WCDMA uplink synchronization position detection method according to an embodiment of the present invention;
FIG. 3 is a schematic view of a slide mechanism according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a WCDMA uplink synchronization position detection method in the prior art;
fig. 5 is a flowchart illustrating a WCDMA uplink synchronization position detection method according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a WCDMA uplink synchronization position detection apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The deviation of the synchronous position obtained based on the existing WCDMA uplink synchronous position detection method is larger, and accurate synchronous position detection cannot be realized, so that the subsequent synchronous detection must be carried out by adopting a very large synchronous calculation window at the rear end, the calculation burden is increased, and the processing time is prolonged. In order to solve the technical problem, an embodiment of the present invention provides a method for detecting a WCDMA uplink synchronization position. Fig. 2 is a schematic flow chart of a WCDMA uplink synchronization position detection method provided in an embodiment of the present invention, and as shown in fig. 2, the method includes:
Here, the uplink signal is a WCDMA uplink signal for which an uplink synchronization position needs to be detected, and the uplink signal is a signal from a user received at the time of uplink synchronization detection by the non-signaling integrated tester. After the uplink signal is obtained, an uplink scrambling code corresponding to the uplink signal needs to be acquired. In the WCDMA system, the role of the uplink scrambling code includes user differentiation, in addition to scrambling and encryption. In the uplink direction, different users in the same cell use different uplink scrambling codes for easy differentiation. Therefore, after receiving the uplink signal, the uplink scrambling code corresponding to the uplink signal can be determined according to the user corresponding to the uplink signal. It should be noted that, the uplink scrambling code usually adopts a truncated Gold sequence, i.e. the length of the uplink scrambling code is 256 chips (chip).
Specifically, the uplink scrambling code has good auto-correlation and cross-correlation characteristics, and each chip in the uplink signal is subjected to sliding correlation based on the uplink scrambling code, so that a correlation peak value is searched for, and uplink synchronization is further realized. The correlation value of each chip is obtained by performing sliding correlation on each chip, and the correlation window required for performing the sliding correlation is the uplink scrambling code, the correlation section is a data section correlated with each chip in the uplink signal, and the correlation section is as long as the uplink scrambling code. In the case that the length of the uplink scrambling code is known to be 256 chips, that is, when the length of the correlation window is 256 chips, the correlation section length of any chip is also 256 chips. In performing sliding correlation, the step size of the sliding correlation is set to 1 chip so as to obtain a correlation value of each chip.
And step 230, acquiring a correlation power value of any chip based on the correlation value of the chip.
Specifically, after the sliding correlation is completed, for any chip, the correlation power value of the chip can be obtained based on the correlation value of the chip. Here, the correlation power value of any chip is used to characterize the power of the chip after performing sliding correlation.
Specifically, after the correlation power value of each chip is obtained, the uplink synchronization position in the uplink signal can be obtained according to the magnitude of the correlation power value of each chip. For example, whether an effective peak exists in a segment of signal may be determined according to a difference between a maximum correlation power value and a minimum correlation power value in the segment of signal in the uplink signal, or a difference between the maximum correlation power value and an average correlation power value, and then whether an uplink synchronization position exists in the segment of signal may be determined, so that the determination range is gradually narrowed until the uplink synchronization position is obtained.
The method provided by the embodiment of the invention realizes accurate synchronous position detection, reduces the calculation burden of subsequent synchronous detection and improves the calculation efficiency of the subsequent synchronous detection by performing sliding correlation on the uplink signal based on the correlation characteristic of the uplink scrambling code.
Based on any of the above embodiments, fig. 3 is a schematic diagram related to sliding provided by an embodiment of the present invention, as shown in fig. 3, in the method, step 220 specifically includes:
step 221, acquiring a correlation segment corresponding to any chip; the relevant segment corresponding to the chip is a segment of the uplink signal which takes the chip as the first chip and has the length equal to the length of the uplink scrambling code.
Specifically, for any chip in any segmented signal, assuming that the position of the chip in the uplink signal is j, the relevant segment corresponding to the chip, that is, the chip with the position from j to the position of j +256-1 in the uplink signal. For example, when the chip position j is 0, the relevant segment corresponding to the chip is a chip from j 0 to j 255, and when the chip position j is 38399, the relevant segment corresponding to the chip is a chip from j 38399 to j 38645.
In fig. 3, the length of a frame signal is 38400 chips, and assuming that the length of the uplink signal is 38400+256-1 chips, the first 38400 chips in the uplink signal can obtain the corresponding correlation segment from the uplink signal, i.e., the total of 256 chips including the chip and the chip are the first one. The correlation window is the uplink scrambling code, and the length of the uplink scrambling code is 256 chips. The correlation window is equal in length to the correlation per chip. The sliding speed is 1 chip/time, i.e. sliding correlation is performed in turn for each of the first 38400 chips.
Step 222, conjugate multiplication accumulation is performed on the correlation segment and the uplink scrambling code to obtain the correlation value of the chip.
Specifically, for any chip, after obtaining the correlation segment of the chip, conjugate multiplication and accumulation may be performed on the correlation segment and the uplink scrambling code, and the conjugate multiplication and accumulation result is the correlation value of the chip.
The calculation formula of conjugate multiplication and accumulation is as follows:
in the formula, the position of any chip in the uplink signal is j, SjIs the correlation value of the chip, rj(i) Is the ith chip in the chip correlation segment, sc (i) is the ith chip in the uplink scrambling code, sc*(i) Is the conjugate function of sc (i).
Based on any of the above embodiments, in the method, step 230 specifically includes: the square of the correlation value of any chip is taken as the correlation power value of the chip.
Specifically, the correlation power value P of the mth chip in the pth segmented signal is obtained based on the following formulaj：
Based on any of the above embodiments, in the method, step 240 specifically includes:
step 241, obtaining a peak detection result of any segmented signal of the uplink signal based on the correlation power value of each chip in the segmented signal; the segmented signal is obtained by dividing the uplink signal.
Specifically, after the uplink signal is obtained, the uplink signal may be divided, and any segment of the uplink signal obtained by the division is a segment of the segmented signal. It should be noted that the uplink signal may be divided according to a preset number of segments, or may be divided according to a preset division length, which is not specifically limited in this embodiment of the present invention.
After the correlation power value of each chip in any segmented signal is obtained, the peak detection result can be obtained according to the magnitude of the correlation power value of each chip. The peak detection result is that a valid peak exists or a valid peak does not exist. The obtaining of the peak detection result may be obtained by obtaining a difference between a maximum correlation power value and a minimum correlation power value in the segment of the segmented signal, or may be obtained by obtaining a difference between a maximum correlation power value and an average correlation power value in the segment of the segmented signal, which is not specifically limited in this embodiment of the present invention.
Step 242, if the peak detection result indicates that there is an effective peak, the position corresponding to the chip with the highest correlation power value in the segmented signal is used as the uplink synchronization position.
Specifically, if the peak detection result of any segmented signal is judged and known to be that an effective peak exists, the peak detection method does not need to be executed on the subsequent segmented signals, and the position of the chip with the highest correlation power value in the segmented signal in the uplink signal is directly used as the uplink synchronization position, so that the uplink synchronization position detection of the WCDMA is completed.
The method provided by the embodiment of the invention can segment the uplink signal, can execute sliding correlation and effective peak value detection aiming at any segmented signal, can obtain the uplink synchronous position after detecting the effective peak value, does not need to perform sliding correlation and other operations on other segmented signals, reduces the calculation amount of the sliding correlation, and improves the detection efficiency of the uplink synchronous position.
Based on any of the above embodiments, in the method, step 241 specifically includes: based on the relevant power value of each chip in any segmented signal, acquiring the peak-to-average ratio of the segmented signal; if the peak-to-average ratio of the segmented signal is greater than or equal to a preset peak-to-average ratio threshold value, determining that a peak detection result is an effective peak value; otherwise, confirming that the peak detection result is that no effective peak exists.
Specifically, the peak-to-average ratio, also called the peak factor, can be obtained by the following formula:
in the formula, CpFor peak-to-average ratio of P-th segmented signal, Pp,maxFor the maximum value of the correlation power in the P-th segmented signal, Pp,rmsAn effective value of the correlation power value obtained for each correlation power value based on the p-th segmented signal.
The preset peak-to-average ratio threshold value is the minimum value of the preset effective peak value, and if the peak-to-average ratio of the segmented signal is greater than or equal to the preset peak-to-average ratio threshold value, the peak value detection result is determined to be the effective peak value; and if the peak-to-average ratio of the segmented signal is smaller than a preset peak-to-average ratio threshold value, determining that no effective peak exists in the peak detection result.
Based on any of the above embodiments, in the method, before the step 241, the method further includes: acquiring a preset segmentation length; and taking the first chip of the uplink signal as a starting point, and dividing the uplink signal once every preset segment length to obtain a plurality of segment signals.
Specifically, the preset segment length is a length value of a segment signal set in advance, for example, 30 chips, or 50 chips. After the predetermined segment length is obtained, the uplink signal is divided from the first chip, for example, if the predetermined segment length is 30 chips, the 0 th to 29 th chips are the first segment signal, the 30 th to 59 th chips are the second segment signal, and the 60 th to 89 th chips are the third segment signal.
It should be noted that, if the segmented signals are obtained before performing steps 220 and 230, steps 220 and 230 may also be performed on any segmented signal, that is, based on the uplink scrambling code, performing sliding correlation on each chip in any segmented signal to obtain a correlation value of each chip; based on the correlation value of any chip, the correlation power value of the chip is obtained. Therefore, the peak detection result of the segmented signal can be obtained after the relevant power value of each chip in the segmented signal is obtained, whether the segmented signal contains the uplink synchronization position or not is judged, and the uplink synchronization position detection of the segmented signal is carried out after the relevant power value of each chip in the uplink signal is not required to be obtained.
Correspondingly, step 230 specifically includes: obtaining the correlation power value P of the mth chip in the pth segmented signal based on the following formulap,m：
In the formula, Pp,mI.e. the correlation power value of the chip with j in the uplink signal, the chip with j in the uplink signal is the mth chip in the pth segmented signal, M is the preset segment length, mod is the remainder symbol,
to round the symbol down.
According to any of the above embodiments, the method further includes, before step 210: and receiving an uplink signal, performing trigger detection on the uplink signal, and confirming that the uplink signal contains a synchronous trigger signal.
Specifically, when detecting the synchronization position of the WCDMA uplink signal, the uplink signal is received first, and trigger detection is performed on the uplink signal to determine whether the currently received uplink signal includes a synchronization trigger signal. If the synchronization trigger signal exists, the WCDMA uplink synchronization position detection method provided in any embodiment is executed based on the currently received uplink signal; and if the synchronous trigger signal is not detected, continuously receiving the uplink signal for trigger detection. Here, there are various ways to perform trigger detection, for example, if an uplink signal with a power lower than a first power threshold is received for a first preset time and then an uplink signal with a power higher than a second power threshold is received for a second preset time, it is determined that the currently received uplink signal includes a synchronization trigger signal. The first preset time, the second preset time, the first power threshold and the second power threshold are all preset parameters.
Based on any of the above embodiments, fig. 4 is a schematic flowchart of a method for detecting a WCDMA uplink synchronization position in the prior art, and fig. 5 is a schematic flowchart of a method for detecting a WCDMA uplink synchronization position provided by another embodiment of the present invention, as can be seen from fig. 4 and fig. 5, steps 510 to 550 are added to the method for detecting a WCDMA uplink synchronization position provided by the embodiment of the present invention based on the prior art, and the method includes the following steps:
in step 410, when detecting the synchronization position of the WCDMA uplink signal, the uplink signal is received first, and the trigger detection is performed on the uplink signal, and step 420 is executed.
And step 430, recording the uplink synchronous position.
The method provided by the embodiment of the invention realizes accurate synchronous position detection, reduces the calculation burden of subsequent synchronous detection and improves the calculation efficiency of the subsequent synchronous detection by performing sliding correlation on the uplink signal based on the correlation characteristic of the uplink scrambling code. In addition, the peak detection method is sequentially executed by segmenting the uplink signals, the execution can be stopped when the effective peak is detected, the sliding correlation is not needed to be carried out on the entire segment of the uplink signals, the calculation amount of the sliding correlation is reduced, and the synchronous position detection efficiency is improved.
Based on any of the above embodiments, fig. 6 is a schematic structural diagram of a WCDMA uplink synchronization position detection apparatus provided in the embodiments of the present invention, as shown in fig. 6, the apparatus includes a scrambling code acquisition unit 610, a sliding correlation unit 620, a correlation power unit 630, and a synchronization detection unit 640;
the scrambling code acquiring unit 610 is configured to acquire an uplink scrambling code corresponding to an uplink signal;
the sliding correlation unit 620 is configured to perform sliding correlation on each chip in the uplink signal based on the uplink scrambling code, and obtain a correlation value of each chip;
the correlation power unit 630 is configured to obtain the correlation power value of any one chip based on the correlation value of the any one chip;
the synchronization detection unit 640 is configured to obtain an uplink synchronization position in the uplink signal based on the correlation power value of each chip.
The device provided by the embodiment of the invention realizes accurate synchronous position detection, reduces the calculation burden of subsequent synchronous detection and improves the calculation efficiency of the subsequent synchronous detection by performing sliding correlation on the uplink signal based on the correlation characteristic of the uplink scrambling code.
Based on any of the above embodiments, the sliding correlation unit 620 is specifically configured to:
acquiring a relevant segment corresponding to any one of the chips; the relevant segment corresponding to any chip is a segment of signal which takes any chip as a first chip and is as long as the uplink scrambling code in the uplink signal;
and performing conjugate multiplication accumulation on the correlation section and the uplink scrambling code to acquire a correlation value of any chip.
Based on any of the above embodiments, the relevant power unit 630 is specifically configured to:
and taking the square of the correlation value of any chip as the correlation power value of any chip.
Based on any of the above embodiments, the synchronization detection unit 640 includes a peak detection subunit and a synchronization acquisition subunit;
the peak detection subunit is configured to obtain a peak detection result of any segmented signal of the uplink signal based on the correlation power value of each chip in the segmented signal; the segmented signals are obtained by dividing the uplink signals;
and the synchronization acquisition subunit is configured to, if the peak detection result indicates that an effective peak exists, use a position corresponding to a chip with a highest correlation power value in the any segmented signal as the uplink synchronization position.
Based on any of the above embodiments, the peak detection subunit is specifically configured to:
acquiring a peak-to-average ratio of any segmented signal based on the correlation power value of each chip in any segmented signal of the uplink signal;
if the peak-to-average ratio of any segmented signal is greater than or equal to a preset peak-to-average ratio threshold value, determining that the peak detection result is an effective peak value; otherwise, confirming that the peak detection result is that no effective peak exists.
According to any of the above embodiments, the apparatus further comprises a segmentation unit; the segmentation unit is to:
acquiring a preset segmentation length;
and taking the first chip of the uplink signal as a starting point, and dividing the uplink signal once every preset segment length to obtain a plurality of segment signals.
Based on any of the above embodiments, the apparatus further comprises a trigger detection unit; the trigger detection unit is used for:
receiving an uplink signal, performing trigger detection on the uplink signal, and confirming that the uplink signal contains a synchronous trigger signal.
Fig. 7 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 7, the electronic device may include: a processor (processor)701, a communication Interface (Communications Interface)702, a memory (memory)703 and a communication bus 704, wherein the processor 701, the communication Interface 702 and the memory 703 complete communication with each other through the communication bus 704. The processor 701 may call a computer program stored in the memory 703 and operable on the processor 701 to execute the WCDMA uplink synchronization position detection method provided by the foregoing embodiments, for example, the method includes: acquiring an uplink scrambling code corresponding to an uplink signal; based on the uplink scrambling code, performing sliding correlation on each chip in the uplink signal to obtain a correlation value of each chip; acquiring the correlation power value of any chip based on the correlation value of the chip; and acquiring an uplink synchronization position in the uplink signal based on the correlation power value of each chip.
In addition, the logic instructions in the memory 703 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to execute the WCDMA uplink synchronization position detection method provided in the foregoing embodiments when executed by a processor, and the method includes: acquiring an uplink scrambling code corresponding to an uplink signal; based on the uplink scrambling code, performing sliding correlation on each chip in the uplink signal to obtain a correlation value of each chip; acquiring the correlation power value of any chip based on the correlation value of the chip; and acquiring an uplink synchronization position in the uplink signal based on the correlation power value of each chip.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A WCDMA uplink synchronous position detection method is characterized by comprising the following steps:
acquiring an uplink scrambling code corresponding to an uplink signal;
based on the uplink scrambling code, performing sliding correlation on each chip in the uplink signal to obtain a correlation value of each chip;
acquiring the correlation power value of any chip based on the correlation value of the chip;
and acquiring an uplink synchronization position in the uplink signal based on the correlation power value of each chip.
2. The method as claimed in claim 1, wherein the performing sliding correlation on each chip of the uplink signal based on the uplink scrambling code to obtain the correlation value of each chip comprises:
acquiring a relevant segment corresponding to any one of the chips; the relevant segment corresponding to any chip is a segment of signal which takes any chip as a first chip and is as long as the uplink scrambling code in the uplink signal;
and performing conjugate multiplication accumulation on the correlation section and the uplink scrambling code to obtain a correlation value of any chip.
3. The method according to claim 1, wherein the obtaining the uplink synchronization position in the uplink signal based on the correlation power value of each chip specifically comprises:
acquiring a peak detection result of any segmented signal of the uplink signal based on the correlation power value of each chip in the segmented signal; the segmented signals are obtained by dividing the uplink signals;
and if the peak detection result indicates that an effective peak exists, taking the position corresponding to the chip with the highest correlation power value in any segmented signal as the uplink synchronization position.
4. The method as claimed in claim 3, wherein the obtaining the peak detection result of any segmented signal based on the correlation power value of each chip in any segmented signal of the uplink signal specifically comprises:
acquiring a peak-to-average ratio of any segmented signal based on the correlation power value of each chip in any segmented signal of the uplink signal;
if the peak-to-average ratio of any segmented signal is greater than or equal to a preset peak-to-average ratio threshold value, determining that the peak detection result is an effective peak value; otherwise, confirming that the peak detection result is that no effective peak exists.
5. The method as claimed in claim 3, wherein the obtaining the peak detection result of any segmented signal based on the correlation power value of each chip in any segmented signal of the uplink signal further comprises:
acquiring a preset segmentation length;
and taking the first chip of the uplink signal as a starting point, and dividing the uplink signal once every preset segment length to obtain a plurality of segment signals.
6. The method for detecting synchronization position of WCDMA uplink according to claim 1, wherein said obtaining the correlation power value of any chip based on the correlation value of any chip specifically comprises:
taking the square of the correlation value of the any chip as the correlation power value of the any chip.
7. The method for detecting synchronous position of WCDMA uplink according to any of claims 1-6, wherein the acquiring the uplink scrambling code corresponding to the uplink signal further comprises:
receiving an uplink signal, performing trigger detection on the uplink signal, and confirming that the uplink signal contains a synchronous trigger signal.
8. A WCDMA ascending synchronization position detection device is characterized by comprising:
a scrambling code obtaining unit, configured to obtain an uplink scrambling code corresponding to the uplink signal;
a sliding correlation unit, configured to perform sliding correlation on each chip in the uplink signal based on the uplink scrambling code, and obtain a correlation value of each chip;
a correlation power unit, configured to obtain a correlation power value of any one chip based on a correlation value of the any one chip;
and a synchronization detection unit, configured to obtain an uplink synchronization position in the uplink signal based on the correlation power value of each chip.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the WCDMA uplink synchronization position detection method as claimed in any one of claims 1 to 7.
10. A non-transitory computer readable storage medium, having stored thereon a computer program, wherein the computer program, when being executed by a processor, implements the steps of the WCDMA uplink synchronization position detection method as recited in any one of claims 1 to 7.
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