CN114301497A - Method, system, equipment and medium for quickly searching and synchronizing mobile communication terminal - Google Patents
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Abstract
The invention relates to the technical field of mobile communication, and discloses a method and a system for quickly searching and synchronizing a mobile communication terminal, computer equipment and a medium, wherein the method comprises the steps of acquiring a received signal comprising a plurality of target carrier frequencies, separating the received signal according to the target carrier frequencies to obtain a plurality of target beacon carriers, carrying out beacon synchronization on the target beacon carriers, and carrying out parallel processing on at least 2 target beacon carriers at the same time. The invention receives the signal containing a plurality of carriers by increasing the bandwidth of the received signal, separates the carriers after receiving, and synchronizes the beacons by the separated carriers in parallel according to the traditional processing mode, thereby effectively shortening the searching/synchronizing time, enabling the mobile communication terminal to be capable of quickly synchronizing, accelerating the terminal access, improving the success rate of the terminal access, and solving the problem of overlong searching time in the synchronizing process of the mobile terminal in the prior art.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a method and a system for quickly searching and synchronizing a mobile communication terminal, computer equipment and a computer storage medium.
Background
In a mobile communication system, a network generally transmits a beacon channel or a signal according to a certain rule, and a terminal acquires the beacon channel or the signal by searching to complete synchronization (initial synchronization, carrier synchronization, timing synchronization). The design for the beacon channel or signal is shown in fig. 1: a sending end (also called a network end, including a base station and a satellite load) periodically sends in a time domain, and one period at least comprises one beacon channel or signal; the frequency domain is distributed according to certain frequency reuse and cell (or beam) rules. The beacon channel refers to a channel with information and a beacon, such as an MIB (master information block) channel of Iridium; signals refer to beacon-only signals with no information, such as FCCH in GMR-1 system, PSS, SSS signals in 4G and 5G, and so on. The network end and the terminal are consistent, the network end sends a beacon channel, and the corresponding terminal receives the beacon channel; the network end sends signals, and the corresponding terminal receives the signals. In fig. 1, x represents a ratio of the frequency-domain distance Δ f between two adjacent beacon channels to the carrier width BW, that is, the frequency-domain distance between two adjacent beacon channels is x basic channel bandwidths, for example, the frequency-domain distance between the nth beacon carrier and the n + mth beacon carrier is m × BW, where x is m.
The terminal searches and captures the beacon in two dimensions of a time domain and a frequency domain in a blind search mode to complete synchronization: searching a certain length Tp (which is more than one beacon sending period T and is also called a beacon period) in a continuous or stepping mode in a time domain; and (3) carrying out beacon carrier search in a certain range (semi-static or full-dynamic system) on a frequency domain.
Blind search of the receiver beacon is shown in fig. 2 and comprises the following steps:
step 1: determining a searching frequency point;
step 2: continuously receiving signals of at least one beacon period T;
and step 3: and (3) attempting synchronization through sliding window processing of the received signal, analyzing if the received signal is a channel, ending if the channel is successfully synchronized, otherwise switching the next searching frequency point, and repeating the steps 1 to 3.
In particular, if the higher layer protocol requires that multiple beacons be synchronized for multiple alternative preferences, step 3 also requires that steps 1 to 3 be repeated if the synchronization is successful.
Therefore, in a mobile communication system, a beacon is periodically transmitted, and for a possible beacon carrier, a terminal receives at least one periodic (or multiple periodic) signal and attempts to acquire the signal in a sliding window manner. If there is no beacon for the current carrier or the beacon signal is weak, or if a higher layer requires searching for multiple carriers. The above steps 1 to 3 are repeated for each carrier, and the blind search synchronization time is continuously lengthened. In the mobile communication system, there is generally a constraint on the initial synchronization time of the terminal, so that the terminal can access the network quickly and has a communication state. The overlong search time in the prior art cannot meet the constraint of terminal access. In addition, factors such as missing the optimal receiving time due to the change of the wireless channel environment or long search time also restrict the success rate of the terminal in network residence.
Disclosure of Invention
The invention aims to provide a method for quickly searching and synchronizing a mobile communication terminal, which solves the problem of overlong searching time in the synchronizing process of the mobile terminal in the prior art and shortens the synchronizing time.
The invention is realized by the following technical scheme:
a method for quickly searching and synchronizing mobile communication terminal includes obtaining received signal containing multiple target carrier frequencies, separating received signal according to target carrier frequencies to obtain multiple target beacon carriers, carrying out beacon synchronization on target beacon carriers, carrying out analysis processing if it is channel, and carrying out parallel processing on at least 2 target beacon carriers at the same time.
Further, when beacon synchronization is performed on the target beacon carrier (and analysis processing is performed if the beacon carrier is a channel), all the target beacon carriers are processed in parallel.
Further, the method for quickly searching for synchronization by a mobile communication terminal includes the steps of:
s1, receiving a signal: acquiring a receiving signal comprising a plurality of target carrier frequencies;
s2, carrier separation: carrying out spectrum shifting and filtering on the received signal according to the target carrier frequency to obtain a target beacon carrier wave, and carrying out down-sampling on the target beacon carrier wave;
s3, baseband parallel processing: and carrying out beacon synchronization on the target beacon carrier, if the target beacon carrier is a channel, carrying out analysis processing, and processing at least 2 target beacon carriers in parallel at the same time.
In some embodiments, as a further improvement of the present solution, step S2 includes the following steps:
s21, setting the target beacon carrier to be 0 frequency through difference frequency correction according to the relation between the target beacon carrier and the receiving central frequency point;
s22, filtering the signal processed in the step S21 according to the target carrier frequency to obtain a target beacon carrier;
s23, downsampling the target beacon carrier to obtain an equivalent signal of a traditional single carrier receiving signal;
in step S3, beacon synchronization is performed on the target beacon carrier after downsampling.
In some embodiments, as a further improvement of the present solution, the method for quickly searching for synchronization by a mobile communication terminal further includes:
s0. band extension: setting a receiving center frequency, a sampling rate Fsample and a receiving period length, and expanding a receiving signal bandwidth which covers target carrier frequencies of all target beacon carriers; the length of the receiving period is larger than the carrier period of the target beacon.
Still another object of the present invention is to provide a system for quickly searching for synchronization in a mobile communication terminal, comprising:
a signal receiving module, configured to obtain a received signal including a plurality of target carrier frequencies;
the carrier separation module is used for separating the received signals according to the target carrier frequency to obtain a plurality of target beacon carriers;
and the synchronization module is used for carrying out beacon synchronization on the target beacon carriers, and at least 2 target beacon carriers are processed in parallel at the same time.
The carrier separation module includes:
the frequency spectrum shifting module is used for setting the target beacon carrier to be 0 frequency through difference frequency correction according to the relation between the target beacon carrier and the receiving central frequency point;
the filtering module is used for filtering the signal processed in the step S21 according to the target carrier frequency to obtain a target beacon carrier;
the sampling module is used for carrying out downsampling on the target beacon carrier to obtain an equivalent signal of a traditional single carrier receiving signal;
and the synchronization module performs beacon synchronization on the target beacon carrier wave after down sampling.
Furthermore, the system also comprises a frequency band expanding module, which is used for setting the receiving center frequency, the sampling rate Fsample and the receiving period length, and expanding the receiving signal bandwidth, wherein the receiving signal bandwidth covers the target carrier frequency of all target beacon carriers; the length of the receiving period is larger than the carrier period of the target beacon
A further object of the present invention is to provide a computer apparatus and a computer readable storage medium, a computer apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the mobile communication terminal fast search synchronization method according to any one of claims 1 to 4 when executing the computer program.
A computer-readable storage medium storing a computer program which, when executed by a processor, implements the above-described mobile communication terminal fast search synchronization method.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention receives the signal containing a plurality of carriers (a plurality of beacon channels or signals) by increasing the bandwidth of the received signal, separates the carriers after receiving, and synchronizes the beacons by the separated carriers in parallel according to the traditional processing mode, thereby effectively shortening the searching/synchronizing time and enabling the mobile communication terminal to be synchronized quickly.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. In the drawings:
FIG. 1 is a time-frequency distribution diagram of a beacon channel or signal of the prior art;
FIG. 2 is a schematic diagram of a beacon blind search synchronization of the prior art;
FIG. 3 is a diagram illustrating fast search synchronization according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of carrier separation in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," "some embodiments," or "examples" mean: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example," "some embodiments," or "examples" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
[ example 1 ]
In the prior art, a mobile terminal synchronization method is a traditional blind search synchronization, only a received signal of one frequency point is processed each time, and carriers of a plurality of frequency points need to be received and sequentially processed for many times, so that the search time is long, and the network residence speed and success rate of the terminal are restricted when the mobile terminal accesses a network. In order to solve the problem, the inventor of the present application proposes a fast search synchronization method based on the traditional blind search synchronization. The synchronization time is shortened, the network access time of the terminal is reduced when the terminal accesses the network, and the access success rate of the terminal is improved.
As shown in fig. 3, in the method for fast searching and synchronizing of a mobile communication terminal in this embodiment, when acquiring a received signal, the received signal including multiple target carrier frequencies is acquired, the received signal is separated according to the target carrier frequencies to obtain multiple target beacon carriers, beacon synchronization (or parsing if it is a channel) is performed on the target beacon carriers, at least 2 target beacon carriers are processed in parallel at the same time, and preferably, in some embodiments, all the target beacon carriers are processed in parallel.
Specifically, the method comprises the following steps:
s1, receiving a signal: acquiring a receiving signal comprising a plurality of target carrier frequencies;
s2, carrier separation: carrying out spectrum shifting and filtering on the received signal according to the target carrier frequency to obtain a target beacon carrier wave, and carrying out down-sampling on the target beacon carrier wave;
s3, baseband parallel processing: and carrying out beacon synchronization on the target beacon carriers, wherein at least 2 target beacon carriers are processed in parallel at the same time.
As shown in FIG. 4, the step S2 includes steps S21-S23:
s21, frequency spectrum shifting: according to the relation (namely the difference value between the target beacon carrier and the receiving center frequency point) of the target beacon carrier and the receiving center frequency point, the target beacon carrier is set to be 0 frequency through difference value frequency correction;
s22, filtering: filtering the signal processed in the step S21 according to the target carrier frequency to obtain a target beacon carrier; in the step, only the signal of the target beacon carrier wave is reserved as much as possible through filtering;
s23, down-sampling: carrying out down-sampling on a target beacon carrier to obtain an equivalent signal of a traditional single carrier receiving signal; in the step, down-sampling is carried out on the filtered target beacon carrier wave to facilitate baseband processing;
in step S3, beacon synchronization is performed on the target beacon carrier after downsampling; in this step, the subsequent baseband processing is executed, and the baseband processing adopts the same processing mode as the prior art, which is not described again, but all the baseband processing is parallel as much as possible, so that the time is further shortened.
In some embodiments, the method may be further improved, and further includes:
s0. band extension: setting a receiving center frequency, a sampling rate Fsample during receiving and a receiving period length, and expanding a receiving signal bandwidth, wherein the receiving signal bandwidth covers target carrier frequencies of all target beacon carriers; the length of the receiving period is larger than the period of the target beacon carrier. The main function of this step is to confirm the receiving center frequency and expand the receiving bandwidth according to the carrier planning, so that a single reception covers multiple target carrier frequencies.
After finding out the problem of long blind search synchronization time of a mobile communication terminal in the prior art, the inventor of the present application analyzes the conventional beacon signal capturing method, and finds that the following characteristics exist in the search of two dimensions of a time domain and a frequency domain, a part of searching for at least one beacon period from the time domain cannot be avoided, and the frequency domain can increase the number of carriers for receiving a beacon each time by expanding a receiving bandwidth, and under the guidance of the idea, the searching method in the embodiment is provided, and the key point of the method is that: first, a signal containing a plurality of carriers (a plurality of beacon channels or signals) is received by increasing the bandwidth of the received signal; then, separating out the carrier wave by means of frequency moving, down-sampling filtering and the like; finally, synchronization of the beacons is attempted as in the conventional approach. Through the change of the processing mode, the searching and synchronizing time can be effectively shortened, so that the mobile communication terminal can be quickly synchronized.
The method of the present application is further illustrated below with reference to specific parameters:
firstly, determining a receiving center frequency F0, expanding the receiver bandwidth to cover the width of a plurality of target carrier frequencies (namely beacon carriers) according to the capacity of receiving bandwidth, wherein the width is at least equal to N beacon carriers, generally greater than N continuous carriers, N is a positive integer not less than 2, and determining the sampling rate Fsample during receiving; determining a receiving period Tp, wherein Tp needs to be larger than a beacon period T, and ensuring that at least one beacon channel/signal is contained in the receiving signal period; thus, the reception bandwidth includes N beacon carrier frequencies (beacon carrier frequencies) Fc1, Fc2, …, Fcn; the difference between these beacon carrier frequencies and the center frequency is Δ f1, Δ f2, …, Δ fn: Δ F1 ═ Fc 1-F0; Δ F2 ═ Fc 2-F0; …, respectively; Δ fn-Fcn-F0. Fig. 4 shows the case where N is 2, and 2 beacon carrier frequencies (beacon carrier frequencies) Ffreq1 and freq2 are included in the reception bandwidth.
When the terminal receives the received signal, the frequencies in the received signal are various frequencies including Fc1, Fc1, … and Fcn; therefore, the received signal is subjected to spectrum shifting, and the signals of the N groups of beacon carriers at the 0 frequency are obtained through the spectrum shifting of the received signal with the sizes of Δ f1 and Δ f2 … Δ fn. The spectrum shifted signal R' (n) ═ R (n) ═ exp [ -2 × pi [ (Δ fn/Fsample) × n ], where R (n) denotes the received signal and n denotes the scattered nth signal point (0 to n-1).
Respectively filtering and downsampling the N groups of signals to obtain N groups of target beacon carrier signals equivalent to the traditional single carrier receiving signals; when the decimation rate is D, cic filters are used to decimate one point by D data points to complete the D-fold down-sampling.
And respectively carrying out traditional blind search synchronization processing on the N groups of target beacon carrier signals obtained after down sampling, trying synchronization, and analyzing the beacon channel if the beacon channel is a channel.
The technical scheme of the embodiment is used for a terminal network access scene, solves the problem of long terminal network access searching time, improves the network access speed and the success rate of the terminal, but expands the bandwidth, separates a plurality of carriers for parallel processing, and can also be expanded to various scenes of a mobile communication system (including a satellite communication system) and multi-carrier parallel processing which are suitable for blind searching of synchronous signals by a periodic beacon channel (signal), for example:
1. for increasing measurement samples in the synchronization phase, shortening the parsing time of the broadcast channel: the extended received signal, besides the synchronization signal, can be used to extract other available channels (such as periodic broadcast channel) or signals (other auxiliary synchronization signals besides those used as blind search synchronization beacons). Other channels or signals may be processed through subsequent signal and channel processing by the method of the present application, such as obtaining more measurement results, completing decoding of broadcast signals in advance, and the like.
2. The service phase increases the compatibility of the multi-carrier service in time domain collision: by multi-carrier reception during the traffic phase, different operations (such as traffic transmission and adjacent carrier measurement) that are separated in the frequency domain but are time-sequentially conflicted or stressed in the time domain can be solved.
[ example 2 ]
A mobile communication terminal rapid search synchronization system, comprising:
a signal receiving module, configured to obtain a received signal including a plurality of target carrier frequencies;
the carrier separation module is used for separating the received signals according to the target carrier frequency to obtain a plurality of target beacon carriers;
and the synchronization module is used for carrying out beacon synchronization on the target beacon carriers, and at least 2 target beacon carriers are processed in parallel at the same time.
The carrier separation module includes:
the frequency spectrum shifting module is used for setting the target beacon carrier to be 0 frequency through difference frequency correction according to the relation between the target beacon carrier and the receiving central frequency point;
the filtering module is used for filtering the signal processed in the step S21 according to the target carrier frequency to obtain a target beacon carrier;
the sampling module is used for carrying out downsampling on the target beacon carrier to obtain an equivalent signal of a traditional single carrier receiving signal;
and the synchronization module performs beacon synchronization on the target beacon carrier wave after down sampling.
In some embodiments, the system for quickly searching for synchronization of a mobile communication terminal of this embodiment may be further improved to further include a band expanding module, configured to set a receiving center frequency, a sampling rate Fsample, and a receiving period length, and expand a received signal bandwidth, where the received signal bandwidth covers target carrier frequencies of all target beacon carriers; the length of the receiving period is larger than the period of the target beacon carrier wave.
[ example 3 ]
In order to implement the foregoing embodiments, this embodiment further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the mobile communication terminal fast search synchronization method proposed by the foregoing embodiments is implemented.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. The steps or methods of the fast search synchronization method of the mobile communication terminal may be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, any one or a combination of the following techniques, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
[ example 4 ]
In order to implement the foregoing embodiments, the present embodiment also proposes a non-transitory computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the fast search synchronization method of a mobile communication terminal as proposed by the foregoing embodiments of the present invention.
A "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable storage medium may even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be noted that each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for quickly searching and synchronizing mobile communication terminal is characterized by that the received signal containing multiple target carrier frequencies is obtained, the received signal is separated according to the target carrier frequencies to obtain multiple target beacon carriers, the target beacon carriers are beacon-synchronized, and at least 2 target beacon carriers are parallelly processed at the same time.
2. The fast search synchronization method of claim 1, wherein all target beacon carriers are processed in parallel when performing beacon synchronization on the target beacon carriers.
3. The fast search synchronization method of mobile communication terminal according to claim 1 or 2, comprising the steps of:
s1, receiving a signal: acquiring a receiving signal comprising a plurality of target carrier frequencies;
s2, carrier separation: carrying out spectrum shifting and filtering on the received signal according to the target carrier frequency to obtain a target beacon carrier wave, and carrying out down-sampling on the target beacon carrier wave;
s3, baseband parallel processing: and carrying out beacon synchronization on the target beacon carriers, wherein at least 2 target beacon carriers are processed in parallel at the same time.
4. The fast search synchronization method of a mobile communication terminal according to claim 3, wherein the step S2 comprises the steps of:
s21, setting the target beacon carrier to be 0 frequency through difference frequency correction according to the relation between the target beacon carrier and the receiving central frequency point;
s22, filtering the signal processed in the step S21 according to the target carrier frequency to obtain a target beacon carrier;
s23, downsampling the target beacon carrier to obtain an equivalent signal of a traditional single carrier receiving signal;
in step S3, beacon synchronization is performed on the target beacon carrier after downsampling.
5. The fast search synchronization method of a mobile communication terminal according to claim 3, further comprising the steps of:
s0. band extension: setting a receiving center frequency, an Fsample sampling rate and a receiving period length, and expanding a receiving signal bandwidth which covers target carrier frequencies of all target beacon carriers; the length of the receiving period is larger than the period of the target beacon carrier wave.
6. A system for fast search synchronization of a mobile communication terminal, comprising:
a signal receiving module, configured to obtain a received signal including a plurality of target carrier frequencies;
the carrier separation module is used for separating the received signals according to the target carrier frequency to obtain a plurality of target beacon carriers;
and the synchronization module is used for carrying out beacon synchronization on the target beacon carriers, and at least 2 target beacon carriers are processed in parallel at the same time.
7. The system of claim 6, wherein the carrier separation module comprises:
the frequency spectrum shifting module is used for setting the target beacon carrier to be 0 frequency through difference frequency correction according to the relation between the target beacon carrier and the receiving central frequency point;
the filtering module is used for filtering the signal processed in the step S21 according to the target carrier frequency to obtain a target beacon carrier;
the sampling module is used for carrying out downsampling on the target beacon carrier to obtain an equivalent signal of a traditional single carrier receiving signal;
and the synchronization module performs beacon synchronization on the target beacon carrier wave after down sampling.
8. The system according to claim 6 or 7, further comprising a band expanding module for setting a receiving center frequency, a sampling rate Fsample, and a receiving period length, and expanding a receiving signal bandwidth, wherein the receiving signal bandwidth covers target carrier frequencies of all target beacon carriers; the length of the receiving period is larger than the period of the target beacon carrier wave.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the fast search synchronization method of a mobile communication terminal according to any one of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the fast search synchronization method of a mobile communication terminal according to any one of claims 1 to 4.
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| US20140355596A1 (en) * | 2013-05-29 | 2014-12-04 | Broadcom Corporation | Method, Apparatus and Computer Program for Search and Synchronisation |
| CN104661287A (en) * | 2015-03-23 | 2015-05-27 | 重庆邮电大学 | Multimode support parallel multichannel fast frequency sweeping method and multimode support parallel multichannel fast frequency sweeping system |
| CN112351434A (en) * | 2021-01-08 | 2021-02-09 | 江苏永鼎通信有限公司 | Method, device and storage medium for parallel searching frequency points of 5G cell |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140355596A1 (en) * | 2013-05-29 | 2014-12-04 | Broadcom Corporation | Method, Apparatus and Computer Program for Search and Synchronisation |
| CN104661287A (en) * | 2015-03-23 | 2015-05-27 | 重庆邮电大学 | Multimode support parallel multichannel fast frequency sweeping method and multimode support parallel multichannel fast frequency sweeping system |
| CN112351434A (en) * | 2021-01-08 | 2021-02-09 | 江苏永鼎通信有限公司 | Method, device and storage medium for parallel searching frequency points of 5G cell |
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