CN114142880B - Dual-frequency narrowband receiving method, system, equipment and medium based on time division multiplexing - Google Patents
Dual-frequency narrowband receiving method, system, equipment and medium based on time division multiplexing Download PDFInfo
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- CN114142880B CN114142880B CN202111463294.8A CN202111463294A CN114142880B CN 114142880 B CN114142880 B CN 114142880B CN 202111463294 A CN202111463294 A CN 202111463294A CN 114142880 B CN114142880 B CN 114142880B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a dual-frequency narrow-band receiving method, a system, equipment and a medium based on time division multiplexing, which are applied to a receiving circuit. The invention can reduce a large amount of power consumption consumed when the receiving circuit cannot receive the node wireless signals for a long time, and can be synchronous with the node wireless signals when the node wireless signals can be received, thereby greatly prolonging the service life of communication equipment.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a dual-frequency narrow-band receiving method, a system, equipment and a medium based on time division multiplexing.
Background
The SG-LongRange is a local area network wireless communication technology, not only supports a 230MHz electric power wireless private network frequency range, but also is compatible with a 510MHz civil metering instrument frequency range, and the double-frequency narrow-band receiving method is to adopt a time division multiplexing mode to receive 230MHz and 510MHz narrow-band signals in a time division mode, meets the technical requirement of SG-LongRange wireless communication, and overcomes the problem of the scarce frequency spectrum resources of the 230MHz frequency range.
The received signals comprise narrowband signals of 230MHz and 510MHz, and a time synchronization mechanism is needed: the receiver resets the receiver timer by taking the wireless signal of the node received by the receiver every time as a timing starting point, so that a wireless receiving circuit is opened slightly in advance when the wireless signal is transmitted by the node, and the power consumption is saved. In practical applications, if the terminal cannot receive the wireless signal, the internal timer cannot be reset. Therefore, the receiver can not start the receiving circuit synchronously with the transmitting time any more, or the receiving terminal frequently starts the receiving circuit, thereby obviously increasing the power consumption.
Disclosure of Invention
Aiming at the problems existing in frequency band switching in the existing dual-frequency band signal receiving method, the invention provides a dual-frequency narrow-band receiving method, a system, equipment and a medium based on time division multiplexing, so as to solve the problems that in the prior art, the receiving time of 230MHz and 510MHz signals is synchronous with the transmitting time of a node, and if a wireless signal cannot be received, a receiving terminal starts a receiving circuit for a long time, and the power consumption is obviously increased.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dual-frequency narrow-band receiving method based on time division multiplexing is applied to a receiving circuit, and the receiving method realizes time division receiving of dual-frequency-band narrow-band signals through the time division multiplexing method, wherein the dual-frequency band is divided into a first frequency band and a second frequency band;
the method specifically comprises the following steps:
when the receiving circuit is started, the receiving circuit continuously receives the first frequency band narrowband signal within a first preset time by using a first frequency band;
circularly detecting the intensity of a first-frequency-band narrowband signal by using a receiving circuit, when the intensity of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, powering down and sleeping the receiving circuit, restarting the receiving circuit after n times of second preset time, continuously receiving the first-frequency-band narrowband signal within the first preset time by using the first frequency band, wherein n represents the number of cycles, and is less than or equal to the preset cycle threshold value, and when the number of cycles reaches the preset cycle threshold value, deeply sleeping the receiving circuit; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time;
and after the second frequency band signal is received, the receiving circuit enters the sleep mode, is restarted after the fourth preset time, and repeats the processes until the receiving circuit is deeply in the sleep mode.
Further, the receiving circuit includes a first rf filter and a second rf filter for receiving the first frequency band and the second frequency band, respectively, and a frequency synthesizer for switching the first frequency band and the second frequency band.
Furthermore, the receiving circuit comprises a receiving signal strength detecting unit for detecting the strength of the narrow-band signal in the first frequency band, and a control unit for controlling the receiving circuit to start or sleep and controlling the switching between the first frequency band and the second frequency band.
Further, the receiving circuit comprises a low-noise amplifier for low-noise amplifying the first frequency band narrow-band signal and the second frequency band narrow-band signal, and a down-conversion mixer for down-converting the signal output by the low-noise amplifier to baseband.
Further, a counter for timing is included in the receiving circuit.
Further, the first frequency band is 230MHz, and the second frequency band is 510MHz.
Further, receiving circuit includes first radio frequency switch and second radio frequency switch, the input of first radio frequency switch and second radio frequency switch is connected to the antenna, the output of first radio frequency switch and second radio frequency switch is connected to 230MHz radio frequency filter and 510MHz radio frequency filter respectively, 230MHz radio frequency filter and 510MHz radio frequency filter's output all is connected to low noise amplifier, low noise amplifier's output connects to down conversion mixer and received signal intensity detecting element in proper order, received signal intensity detecting element's output passes through the counter and is connected to the control unit, the output of control unit is connected to first radio frequency switch, second radio frequency switch and frequency synthesizer, the output of frequency synthesizer is connected to down conversion mixer.
The dual-frequency narrow-band receiving system based on time division multiplexing comprises a first frequency band narrow-band signal receiving module, a judging receiving module and a continuous receiving module, wherein:
the first frequency band narrow-band signal receiving module: the receiving circuit is used for continuously receiving the first frequency band narrowband signal within a first preset time by using a first frequency band when the receiving circuit is started;
a judging and receiving module: the receiving circuit is used for circularly detecting the strength of the first-frequency-band narrowband signal by using the receiving circuit, when the strength of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, the receiving circuit is in power-down sleep, and is restarted after n times of second preset time, and the first-frequency-band narrowband signal is continuously received in the first preset time by using the first frequency band, n represents the cycle number, and is less than or equal to the preset cycle number threshold value, and when the cycle number reaches the preset cycle number threshold value, the receiving circuit is in deep sleep; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time;
a continuous receiving module: and the receiving circuit is used for entering the sleep mode after the second frequency band signal is received, restarting after a fourth preset time, and repeating the processes until the receiving circuit is deeply in the sleep mode.
The double-frequency narrow-band receiving device based on time division multiplexing comprises a receiving circuit and a double-frequency narrow-band receiving system based on time division multiplexing;
the receiving circuit comprises a first radio frequency switch and a second radio frequency switch, wherein the input ends of the first radio frequency switch and the second radio frequency switch are connected to an antenna, the output ends of the first radio frequency switch and the second radio frequency switch are respectively connected to a 230MHz radio frequency filter and a 510MHz radio frequency filter, the output ends of the 230MHz radio frequency filter and the 510MHz radio frequency filter are both connected to a low noise amplifier, the output end of the low noise amplifier is sequentially connected to a down-conversion mixer and a received signal strength detection unit, the output end of the received signal strength detection unit is connected to a control unit through a counter, the output end of the control unit is connected to the first radio frequency switch, the second radio frequency switch and a frequency synthesizer, and the output end of the frequency synthesizer is connected to the down-conversion mixer;
the dual-frequency narrow-band receiving system based on time division multiplexing comprises a first frequency band narrow-band signal receiving module, a judging receiving module and a continuous receiving module;
the first frequency band narrow-band signal receiving module: the receiving circuit is used for continuously receiving the first frequency band narrowband signal within a first preset time by using a first frequency band when the receiving circuit is started; the first frequency band is 230MHz;
a judging and receiving module: the receiving circuit is used for circularly detecting the strength of the first-frequency-band narrowband signal by using the receiving circuit, when the strength of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, the receiving circuit is in power-down dormancy, and is restarted after n times of second preset time, the first-frequency-band narrowband signal is continuously received within the first preset time by using the first frequency, n represents the cycle number, n is less than or equal to the preset cycle number threshold value, and when the cycle number reaches the preset cycle number threshold value, the receiving circuit is in deep dormancy; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time; the second frequency band is 510MHz;
a continuous receiving module: and the receiving circuit is used for entering the sleep mode after the second frequency band signal is received, restarting after a fourth preset time, and repeating the processes until the receiving circuit is deeply in the sleep mode.
A computer device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, said processor implementing the steps of said time division multiplexing based dual frequency narrowband reception method when executing said computer program.
A computer-readable storage medium, which stores a computer program that, when being executed by a processor, carries out the steps of the dual-band narrowband reception method based on time division multiplexing.
Compared with the prior art, the invention has the following beneficial technical effects:
the receiving circuit receives the dual-band narrowband signal from the node in a time-sharing manner, and enters the sleep state after receiving the narrowband signal so as to save power consumption; the problem that the power consumption of a receiving circuit is greatly increased due to the fact that the receiving circuit is started for a long time due to the fact that wireless signal transmission attenuation or coverage range is insufficient is solved. The invention aims to reduce a large amount of power consumption consumed when the receiving circuit cannot receive the node wireless signals for a long time, and can be synchronous with the node wireless signals when the node wireless signals can be received, thereby greatly prolonging the service life of communication equipment.
In addition, when the cycle number reaches the preset cycle number threshold, it is indicated that the wireless signal cannot be covered and cannot reach the receiving sensitivity specified by the receiving circuit, and the receiving circuit enters the longest sleep state, namely deep sleep, so that the situation that the wireless signal cannot cover the receiving circuit and the receiving circuit is frequently started to receive and then the power supply battery is exhausted due to abnormal wireless transceiving function of the node can be prevented.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of the method of the present invention;
fig. 2 is a basic structure diagram of a receiving circuit to which the present invention is applied.
The system comprises a first radio frequency switch 201, a second radio frequency switch 202, a received signal strength detection unit 203, a 230MHz radio frequency filter 204, a 510MHz radio frequency filter 205, a low noise amplifier 206, a down-conversion mixer 207, a frequency synthesizer 208, a control unit 209 and a counter 210.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
A dual-frequency narrow-band receiving method based on time division multiplexing is applied to a receiving circuit, and the receiving method realizes time division receiving of dual-frequency narrow-band signals through the time division multiplexing method, wherein the dual-frequency narrow-band signals are divided into a first frequency band and a second frequency band;
the method comprises the following steps:
step S1, when the receiving circuit is started, a first frequency band narrow-band signal is continuously received by starting a first preset time in a first frequency band through adjusting a radio frequency filter and a frequency synthesizer, and step S2 is carried out at the same time; wherein the first preset time is 2s;
s2, the receiving circuit detects the intensity of the first-frequency-band narrowband signal, when the intensity of the first-frequency-band narrowband signal is not higher than a preset threshold value RSP all the time, the receiving circuit is in power-off dormancy, the step S1 is restarted after a second preset time, and the second preset time is 10 minutes; when the step S1 is restarted and the intensity of the first frequency band narrow-band signal detected for the second time is less than or equal to the preset threshold value, the receiving circuit is powered off and sleeps for the second time, and the step S1 is restarted after 2 times of second preset time, namely 20 minutes; the time difference between the power-down dormancy of the receiving circuit and the starting of the receiving circuit is sequentially increased, but the preset maximum value is set to be 1 hour; if the intensity of the first frequency band narrowband signal is still less than or equal to the preset threshold value until the nth detection, if n is less than or equal to 6, restarting the receiving circuit after n 10 minutes after the power-down sleep to start the step S1, if n is greater than 6, the wireless signal cannot be covered, the receiving sensitivity specified by the receiving circuit cannot be reached, and the receiving circuit enters the longest sleep state, namely deep sleep, and only starts the longest 2-second continuous receiving state after the sleep per hour; the advantages of this are: the wireless receiving and sending functions of the nodes are abnormal, wireless signals cannot cover the receiving circuit, the receiving circuit is frequently started to receive the wireless signals, the power supply battery is exhausted, and meanwhile, the receiving circuit is prevented from being manually restarted and awakened one by one after sleeping for a long time after the nodes are recovered to be normal; in the above process, when the receiving circuit detects that the intensity of the first frequency band narrowband signal is higher than the preset threshold RSP, the receiving circuit performs timing clearing and timing restarting, adjusts the rf filter and the frequency synthesizer to switch to the second frequency band for receiving after a preset time slot, and continuously receives the second frequency band narrowband signal within a third preset time, wherein the preset time slot is 2 milliseconds, and the third preset time is 1 second;
in the above step, the narrowband signal to be received is in a form based on time division multiplexing, that is, the narrowband signals of the first frequency band and the second frequency band alternate on a time axis, and the receiving circuit should include 2 switchable rf filters of the first frequency band and the second frequency band and a frequency synthesizer capable of switching the dual frequency bands, and may be switched by an internal control signal.
In step S2, the receiving circuit should include a received signal strength detecting unit and a control unit of the first frequency band, and a counter is also required inside the receiving circuit. The control unit can control the switching of the radio frequency filter and the frequency synthesizer, and control the dormancy of the receiving circuit and the switching of the frequency band through the detection result of the received signal strength detection unit and the timing result of the counter.
In step S2, the threshold RSP value is-110 dBm. The PSR value is the power intensity of the received first frequency band narrowband signal.
And S3, after the second frequency band signal is received, the receiving circuit enters the sleep mode, and the step S1 is repeated after fourth preset time till the receiving circuit is deeply in the sleep mode, wherein the fourth preset time is 1 hour.
The receiving circuit further comprises a low-noise amplifier for low-noise amplifying the first frequency band narrow-band signal and the second frequency band narrow-band signal, and a down-conversion mixer for down-converting a signal output by the low-noise amplifier to a baseband.
As shown in fig. 2, the present invention further provides a dual-band narrowband receiving system based on time division multiplexing, which includes a first frequency band narrowband signal receiving module, a determining receiving module, and a continuous receiving module, wherein:
the first frequency band narrow-band signal receiving module: the receiving circuit is used for continuously receiving the first frequency band narrowband signal within a first preset time by using a first frequency band when the receiving circuit is started;
a judging and receiving module: the receiving circuit is used for circularly detecting the strength of the first-frequency-band narrowband signal by using the receiving circuit, when the strength of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, the receiving circuit is in power-down sleep, and is restarted after n times of second preset time, and the first-frequency-band narrowband signal is continuously received in the first preset time by using the first frequency band, n represents the cycle number, and is less than or equal to the preset cycle number threshold value, and when the cycle number reaches the preset cycle number threshold value, the receiving circuit is in deep sleep; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time;
a continuous receiving module: and the receiving circuit is used for entering the sleep mode after the second frequency band signal is received, restarting after fourth preset time, and repeating the processes until the receiving circuit is deeply in the sleep mode.
The invention also provides a double-frequency narrow-band receiving device based on time division multiplexing, which comprises a receiving circuit and a double-frequency narrow-band receiving system based on time division multiplexing;
the receiving circuit comprises a first radio frequency switch 201 and a second radio frequency switch 202, wherein the input ends of the first radio frequency switch 201 and the second radio frequency switch 202 are connected to an antenna, the output ends of the first radio frequency switch 201 and the second radio frequency switch 202 are respectively connected to a 230MHz radio frequency filter 204 and a 510MHz radio frequency filter 205, the output ends of the 230MHz radio frequency filter 204 and the 510MHz radio frequency filter 205 are both connected to a low noise amplifier 206, the output end of the low noise amplifier 206 is sequentially connected to a down-conversion mixer 207 and a received signal strength detection unit 203, the output end of the received signal strength detection unit 203 is connected to a control unit 209 through a counter 210, the output end of the control unit 209 is connected to the first radio frequency switch 201, the second radio frequency switch 202 and a frequency synthesizer 208, and the output end of the frequency synthesizer 208 is connected to the down-conversion mixer 207;
the dual-frequency narrow-band receiving system based on time division multiplexing comprises a first frequency band narrow-band signal receiving module, a judging receiving module and a continuous receiving module;
the first frequency band narrow-band signal receiving module: the receiving circuit is used for continuously receiving the first frequency band narrowband signal within a first preset time by a first frequency band when the receiving circuit is started; the first frequency band is 230MHz;
a judging and receiving module: the receiving circuit is used for circularly detecting the strength of the first-frequency-band narrowband signal by using the receiving circuit, when the strength of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, the receiving circuit is in power-down sleep, and is restarted after n times of second preset time, and the first-frequency-band narrowband signal is continuously received in the first preset time by using the first frequency band, n represents the cycle number, and is less than or equal to the preset cycle number threshold value, and when the cycle number reaches the preset cycle number threshold value, the receiving circuit is in deep sleep; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time; the second frequency band is 510MHz;
a continuous receiving module: and the receiving circuit is used for entering the sleep mode after the second frequency band signal is received, restarting after a fourth preset time, and repeating the processes until the receiving circuit is deeply in the sleep mode.
The invention is described in detail below with reference to specific examples:
an embodiment of a 230MHz/510MHz dual-frequency narrow-band receiving method based on time division multiplexing is applied to a receiving circuit, and realizes time-sharing receiving of 230MHz frequency band and 510MHz frequency band dual-frequency band narrow-band signals based on time division multiplexing.
As shown in fig. 1, the method comprises the following steps:
step S1, when a receiving circuit is started, a radio frequency filter and a frequency synthesizer are adjusted to start for 2S time at a 230MHz frequency band to continuously receive a 230MHz frequency band narrow-band signal, and step S2 is carried out at the same time;
s2, the receiving circuit detects the strength of the 230MHz band narrow-band signal, when the strength of the 230MHz band narrow-band signal is not higher than-110 dBm all the time, the receiving circuit is in power-off dormancy, and the step S1 is restarted after 10 minutes; when the intensity of the first frequency band narrow-band signal detected for the second time is less than or equal to the preset threshold value, the receiving circuit is in power-down dormancy for the second time, and the step S1 is restarted after 2 times of second preset time, namely 20 minutes; the time difference between the power-down dormancy of the receiving circuit and the starting of the receiving circuit is sequentially increased, but the preset maximum value is set to be 1 hour, namely if the strength of the first frequency band narrowband signal is still less than or equal to the preset threshold value until the nth detection, if n is less than or equal to 6, the receiving circuit is restarted after n 10 minutes after the power-down dormancy to start the step S1, if n is greater than 6, the receiving circuit enters the longest dormancy state, namely the deep dormancy, and the goal that the dormancy is started only for the longest 2 seconds of continuous receiving state per hour is achieved; when the receiving circuit detects that the strength of the 230MHz frequency band narrow-band signal is higher than-110 dBm, a counter in the receiving circuit is cleared and starts to count, and a radio frequency filter and a frequency synthesizer are adjusted to be switched to a 510MHz frequency band to receive the 510MHz frequency band narrow-band signal of 1s after 2 milliseconds;
and S3, after the second frequency band signal is received, the receiving circuit enters the sleep mode, and the step S1 is repeated after 1 hour until the receiving circuit is deeply in the sleep mode.
In the technical scheme, the introduction of in-band noise is reduced by receiving the 230MHz/510MHz narrow-band signals in a time-sharing manner, the receiving sensitivity is improved, and the coverage range of communication equipment is enlarged; the power consumption is saved by the regular dormancy of the receiving circuit, and the service life of the communication equipment can be prolonged.
Fig. 2 is a basic structure of a receiving circuit according to an embodiment, in the receiving circuit, a first rf switch 201 and a second rf switch 202 are controlled by a control unit 209, and when step S1 starts, the first rf switch 201 is turned on, the second rf switch 202 is turned off, a frequency synthesizer 208 is adjusted, a 230MHz frequency band narrowband signal receiving path is opened for 2S, and then the receiving strength of the 230MHz frequency band narrowband signal is determined according to a received signal strength detection unit 203.
When the intensity of the narrowband signal in the 230MHz frequency band detected by the received signal intensity detection unit 203 is not higher than the set threshold RSP = -110dBm, it is determined that there is no signal transmission, and the receiving circuit enters a sleep mode. When the 230MHz frequency band narrowband signal strength detected by the received signal strength detection unit 203 is higher than the set threshold RSP = -110dBm, the internal counter 210 starts counting, and after a time slot of 1s, the control unit 209 turns on the radio frequency switch 202, turns off the radio frequency switch 201, adjusts the frequency synthesizer 208, and turns on the 510MHz frequency band narrowband signal receiving path for 1s. And after the narrow-band signal in the 510MHz frequency band is received, enabling the receiving circuit to sleep.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the scope of protection thereof, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: various alterations, modifications and equivalents may be introduced into the embodiments of the invention by those skilled in the art after reading this disclosure, and such alterations, modifications and equivalents are intended to be within the scope of the invention as defined in the appended claims.
Claims (11)
1. The double-frequency narrow-band receiving method based on time division multiplexing is characterized by being applied to a receiving circuit and realizing time-sharing receiving of double-frequency-band narrow-band signals by the time division multiplexing method, wherein the double frequency bands are divided into a first frequency band and a second frequency band;
the method specifically comprises the following steps:
when the receiving circuit is started, the receiving circuit continuously receives the first frequency band narrowband signal within a first preset time by using a first frequency band;
circularly detecting the intensity of a first-frequency-band narrowband signal by using a receiving circuit, when the intensity of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, powering down and sleeping the receiving circuit, restarting the receiving circuit after n times of second preset time, continuously receiving the first-frequency-band narrowband signal within the first preset time by using the first frequency band, wherein n represents the cycle number, is less than or equal to the preset cycle number threshold value, and deeply sleeping the receiving circuit when the cycle number reaches the preset cycle number threshold value; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time;
and after the second frequency band signal is received, the receiving circuit enters the sleep mode, is restarted after the fourth preset time, and repeats the processes until the receiving circuit is deeply in the sleep mode.
2. The dual-band narrowband receiving method based on time division multiplexing according to claim 1, wherein the receiving circuit comprises a first rf filter and a second rf filter for receiving the first band and the second band, respectively, and a frequency synthesizer for switching the first band and the second band.
3. The dual-band narrowband receiving method based on time division multiplexing according to claim 1, wherein the receiving circuit comprises a receiving signal strength detecting unit for detecting the strength of the narrowband signal in the first frequency band, and a control unit for controlling the receiving circuit to start or sleep and controlling the switching between the first frequency band and the second frequency band.
4. The dual-band narrowband receiving method based on time division multiplexing according to claim 1, wherein the receiving circuit comprises a low-noise amplifier for low-noise amplifying the first-band narrowband signal and the second-band narrowband signal, and a down-conversion mixer for down-converting a signal output by the low-noise amplifier to a baseband.
5. The time division multiplexing-based dual-band narrowband receiving method according to claim 1, wherein the receiving circuit comprises a counter for timing.
6. The dual-band narrowband receiving method based on time division multiplexing of claim 1, wherein the first band is 230MHz and the second band is 510MHz.
7. The dual-band narrowband reception method based on time division multiplexing according to claim 6, characterized in that the reception circuit comprises a first radio frequency switch (201) and a second radio frequency switch (202), the inputs of the first radio frequency switch (201) and the second radio frequency switch (202) are connected to an antenna, the outputs of the first radio frequency switch (201) and the second radio frequency switch (202) are connected to a 230MHz radio frequency filter (204) and a 510MHz radio frequency filter (205), respectively, the outputs of the 230MHz radio frequency filter (204) and the 510MHz radio frequency filter (205) are both connected to a low noise amplifier (206), the output of the low noise amplifier (206) is in turn connected to a down-conversion mixer (207) and a reception signal strength detection unit (203), the output of the reception signal strength detection unit (203) is connected to a control unit (209) through a counter (210), the output of the control unit (209) is connected to the first radio frequency switch (201), the second radio frequency switch (202) and a frequency synthesizer (208), and the output of the frequency synthesizer (208) is connected to the down-conversion mixer (207).
8. The dual-frequency narrow-band receiving system based on time division multiplexing is characterized by comprising a first frequency band narrow-band signal receiving module, a judging receiving module and a continuous receiving module, wherein:
the first frequency band narrow-band signal receiving module: the receiving circuit is used for continuously receiving the first frequency band narrowband signal within a first preset time by using a first frequency band when the receiving circuit is started;
a judging and receiving module: the receiving circuit is used for circularly detecting the strength of the first-frequency-band narrowband signal by using the receiving circuit, when the strength of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, the receiving circuit is in power-down sleep, and is restarted after n times of second preset time, and the first-frequency-band narrowband signal is continuously received in the first preset time by using the first frequency band, n represents the cycle number, and is less than or equal to the preset cycle number threshold value, and when the cycle number reaches the preset cycle number threshold value, the receiving circuit is in deep sleep; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time;
a continuous receiving module: and the receiving circuit is used for entering the sleep mode after the second frequency band signal is received, restarting after a fourth preset time, and repeating the processes until the receiving circuit is deeply in the sleep mode.
9. The double-frequency narrow-band receiving device based on time division multiplexing is characterized by comprising a receiving circuit and a double-frequency narrow-band receiving system based on time division multiplexing;
the receiving circuit comprises a first radio frequency switch (201) and a second radio frequency switch (202), wherein the input ends of the first radio frequency switch (201) and the second radio frequency switch (202) are connected to an antenna, the output ends of the first radio frequency switch (201) and the second radio frequency switch (202) are respectively connected to a 230MHz radio frequency filter (204) and a 510MHz radio frequency filter (205), the output ends of the 230MHz radio frequency filter (204) and the 510MHz radio frequency filter (205) are both connected to a low noise amplifier (206), the output end of the low noise amplifier (206) is sequentially connected to a down-conversion mixer (207) and a received signal strength detection unit (203), the output end of the received signal strength detection unit (203) is connected to a control unit (209) through a counter (210), the output end of the control unit (209) is connected to the first radio frequency switch (201), the second radio frequency switch (202) and a frequency synthesizer (208), and the output end of the frequency synthesizer (208) is connected to the down-conversion mixer (207);
the dual-frequency narrow-band receiving system based on time division multiplexing comprises a first frequency band narrow-band signal receiving module, a judging receiving module and a continuous receiving module;
the first frequency band narrow-band signal receiving module: the receiving circuit is used for continuously receiving the first frequency band narrowband signal within a first preset time by a first frequency band when the receiving circuit is started; the first frequency band is 230MHz;
a judging and receiving module: the receiving circuit is used for circularly detecting the strength of the first-frequency-band narrowband signal by using the receiving circuit, when the strength of the first-frequency-band narrowband signal is less than or equal to a preset threshold value, the receiving circuit is in power-down sleep, and is restarted after n times of second preset time, and the first-frequency-band narrowband signal is continuously received in the first preset time by using the first frequency band, n represents the cycle number, and is less than or equal to the preset cycle number threshold value, and when the cycle number reaches the preset cycle number threshold value, the receiving circuit is in deep sleep; in the above cycle process, when the strength of the first frequency band narrowband signal is greater than the preset threshold, the internal timing of the receiving circuit is cleared and restarted, the receiving circuit is switched to the second frequency band after the preset time slot, and the second frequency band narrowband signal is continuously received within the third preset time; the second frequency band is 510MHz;
a continuous receiving module: and the receiving circuit is used for entering the sleep mode after the second frequency band signal is received, restarting after fourth preset time, and repeating the processes until the receiving circuit is deeply in the sleep mode.
10. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the time division multiplexing based dual frequency narrowband reception method according to any of claims 1 to 7 when executing the computer program.
11. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the dual-band narrowband reception method based on time division multiplexing according to any one of claims 1 to 7.
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