CN114039624B - Energy receiving device and method for dual sequence frequency hopping communication under low signal-to-noise ratio - Google Patents
Energy receiving device and method for dual sequence frequency hopping communication under low signal-to-noise ratio Download PDFInfo
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- CN114039624B CN114039624B CN202111295733.9A CN202111295733A CN114039624B CN 114039624 B CN114039624 B CN 114039624B CN 202111295733 A CN202111295733 A CN 202111295733A CN 114039624 B CN114039624 B CN 114039624B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- 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
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to an energy receiving device and method for dual-sequence frequency hopping communication under low signal-to-noise ratio, wherein the energy receiving device comprises a first frequency hopping module for generating a demodulation receiving signal of a first frequency hopping carrier signal according to a radio frequency signal, a second frequency hopping module for generating a demodulation receiving signal of a second frequency hopping carrier signal according to the radio frequency signal, and a decision mixing module for sampling and deciding the demodulation receiving signal of the first frequency hopping carrier signal and the demodulation receiving signal of the second frequency hopping carrier signal to generate a receiving code element. The invention aims at the problem of receiving the dual-sequence frequency hopping communication signal by stochastic resonance processing, combines the characteristics of the output signal of the dual-sequence frequency hopping signal by stochastic resonance processing, establishes an energy receiver of the dual-sequence frequency hopping signal under low signal to noise ratio, can effectively complete the reception of the dual-sequence frequency hopping signal under the low signal to noise ratio, provides new possibility for the reception of the dual-sequence frequency hopping signal under the low signal to noise ratio, and provides new reference and reference for the reception of the dual-sequence frequency hopping signal under the low signal to noise ratio.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an energy receiving device and method for dual sequence frequency hopping communication under low signal to noise ratio.
Background
The aerospace measurement and control link is designed for a low signal-to-noise ratio communication scene, and the transmission rate is generally low due to the high reliability requirement of the aerospace measurement and control link. In addition, the space-flight data transmission link is designed aiming at a scene with high signal-to-noise ratio, the transmission capacity is large, the transmission rate is generally higher, and along with expansion of space-flight service and increase of information types, how to effectively complete receiving of dual-sequence frequency hopping signals under low signal-to-noise ratio becomes a technical problem to be solved at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy receiving device and method for dual-sequence frequency hopping communication under low signal-to-noise ratio aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
an energy receiving device for dual-sequence frequency hopping communication under low signal-to-noise ratio comprises a signal receiving module, a first frequency hopping module, a second frequency hopping module and a decision mixing module;
the signal receiving module is used for receiving radio frequency signals sent by an antenna and respectively sending the radio frequency signals to the first frequency hopping module and the second frequency hopping module;
the first frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a first frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the first frequency hopping carrier signal to the decision mixing module;
the second frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a second frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the second frequency hopping carrier signal to the decision mixing module;
the decision mixing module is configured to receive the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, sample and decide the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, and then combine the demodulated received signals to generate a received symbol.
The method has the beneficial effects that: the energy receiving device for dual-sequence frequency hopping communication under low signal-to-noise ratio comprises a signal receiving module, a first frequency hopping module, a second frequency hopping module and a decision mixing module; the signal receiving module is used for receiving radio frequency signals sent by an antenna and respectively sending the radio frequency signals to the first frequency hopping module and the second frequency hopping module; the first frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a first frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the first frequency hopping carrier signal to the decision mixing module; the second frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a second frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the second frequency hopping carrier signal to the decision mixing module; the decision mixing module is configured to receive the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, sample and decide the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, and then combine the demodulated received signals to generate a received symbol. Aiming at the problem of receiving the dual-sequence frequency hopping communication signal by stochastic resonance processing, the invention provides an energy receiver which can be used for dual-sequence frequency hopping communication under low signal-to-noise ratio by combining the characteristics of the output signal of the dual-sequence frequency hopping signal by stochastic resonance processing, and provides new possibility for receiving the dual-sequence frequency hopping signal under low signal-to-noise ratio. The energy receiver for the dual-sequence frequency hopping signal under the low signal-to-noise ratio is established, the reception of the dual-sequence frequency hopping signal under the low signal-to-noise ratio can be effectively completed, and new reference and reference can be provided for the reception of the dual-sequence frequency hopping signal under the low signal-to-noise ratio.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the signal receiving module comprises a radio frequency processing circuit;
the radio frequency processing circuit is used for respectively transmitting radio frequency signals to the first frequency hopping module and the second frequency hopping module.
Further, the first frequency hopping module comprises a first mixing processing unit, a first band-pass filtering processing unit, a first scale conversion unit, a first satellite resonance unit, a first modulus squaring circuit and a first accumulation summation averaging processing circuit;
the first mixing processing unit is configured to receive the radio frequency signal andbased on the radio frequency signal and a first pseudo-random sequence FS 0 Generating a first carrier branch signal, receiving an intermediate frequency signal frequency f based on the first carrier branch signal and superheterodyne 0 Obtaining a first mixed signal and sending the first mixed signal to the first band-pass filtering processing unit;
the first band-pass filtering processing unit is used for carrying out band-pass filtering on the first mixed signal to obtain a first intermediate frequency signal, and sending the first intermediate frequency signal to the first scale conversion unit;
the first scale conversion unit is used for performing scale conversion on the first intermediate frequency signal to obtain a first scale conversion processing signal, and sending the first scale conversion processing signal to the first satellite resonance unit;
the first satellite wave resonance unit is used for carrying out resonance processing on the first scale transformation processing signal to obtain a first resonance processing signal, and sending the first resonance processing signal to the first module value squaring circuit;
the first module value squaring circuit is used for performing module value squaring operation on the first resonance processing signal to obtain a first module value squaring signal, and sending the first module value squaring signal to the first accumulation summation averaging processing circuit;
and the first accumulation summation average processing circuit is used for carrying out accumulation summation average according to the number N of the received decision points and the first modulus square signal to obtain a received signal demodulated by the first frequency hopping carrier signal.
Further, the second frequency hopping module comprises a second mixing processing unit, a second band-pass filtering processing unit, a second scale conversion unit, a second satellite resonance unit, a second modulus squaring circuit and a second accumulation summation averaging processing circuit;
the second mixing processing unit is used for receiving the radio frequency signal and according to the radio frequency signal and a second pseudo random sequence FS 1 Generating a second carrier branch signal, receiving an intermediate frequency signal frequency f based on the second carrier branch signal and superheterodyne 1 Obtaining a second mixed signal, and sending the second mixed signal to the second band-pass filtering processing unit;
the second band-pass filtering processing unit is used for carrying out band-pass filtering on the second mixed signal to obtain a second intermediate frequency signal, and sending the second intermediate frequency signal to the second scale conversion unit;
the second scale conversion unit is used for performing scale conversion on the second intermediate frequency signal to obtain a second scale conversion processing signal, and sending the second scale conversion processing signal to the second satellite resonance unit;
the second satellite wave resonance unit is used for carrying out resonance processing on the second scale conversion processing signal to obtain a second resonance processing signal, and sending the second resonance processing signal to the second module value squaring circuit;
the second module squaring circuit is used for performing module squaring operation on the second resonance processing signal to obtain a second module squaring signal, and sending the second module squaring signal to the second accumulation summation averaging processing circuit;
and the second accumulation and summation average processing circuit is used for carrying out accumulation and summation average on the square signal according to the number N of the receiving decision points and the second modulus value to obtain a receiving signal demodulated by the second frequency hopping carrier signal.
Further, the decision mixing module is a one-out-of-three switch.
The invention also solves the technical problems as follows:
an energy receiving method for dual sequence frequency hopping communications at low signal to noise ratios, comprising:
the signal receiving module receives radio frequency signals sent by the antenna and sends the radio frequency signals to the first frequency hopping module and the second frequency hopping module respectively;
the first frequency hopping module receives the radio frequency signal, generates a demodulation receiving signal of a first frequency hopping carrier signal according to the radio frequency signal, and sends the demodulation receiving signal of the first frequency hopping carrier signal to the decision mixing module;
the second frequency hopping module receives the radio frequency signal, generates a demodulation receiving signal of a second frequency hopping carrier signal according to the radio frequency signal, and sends the demodulation receiving signal of the second frequency hopping carrier signal to the decision mixing module;
the decision mixing module receives the demodulation receiving signal of the first frequency hopping carrier signal and the demodulation receiving signal of the second frequency hopping carrier signal, samples and decides the demodulation receiving signal of the first frequency hopping carrier signal and the demodulation receiving signal of the second frequency hopping carrier signal, and then combines the signals to generate a receiving code element.
Further, the signal receiving module includes a radio frequency processing circuit, and the method further includes:
the radio frequency processing circuit sends radio frequency signals to the first frequency hopping module and the second frequency hopping module respectively.
Further, the generating a first frequency hopping carrier signal according to the radio frequency signal specifically includes:
receiving the radio frequency signal and according to the radio frequency signal and the first pseudo random sequence FS 0 Generating a first carrier branch signal, receiving an intermediate frequency signal frequency f based on the first carrier branch signal and superheterodyne 0 Obtaining a first mixed signal;
band-pass filtering the first mixed signal to obtain a first intermediate frequency signal;
performing scale conversion processing on the first intermediate frequency signal to obtain a first scale conversion processing signal;
carrying out resonance processing on the first scale conversion processing signal to obtain a first resonance processing signal;
performing a module value squaring operation on the first resonance processing signal to obtain a first module value squaring signal;
and the first accumulation summation average processing circuit is used for carrying out accumulation summation average according to the number N of the received decision points and the first modulus square signal to obtain a received signal demodulated by the first frequency hopping carrier signal.
Further, the generating a second frequency hopping carrier signal according to the radio frequency signal specifically includes:
receiving the radio frequency signal and according to the radio frequency signal and the second pseudo random sequence FS 1 Generating a second carrier branch signal, receiving an intermediate frequency signal frequency f based on the second carrier branch signal and superheterodyne 1 Obtaining a second mixed signal;
band-pass filtering the second mixed signal to obtain a second intermediate frequency signal;
performing scale conversion processing on the second intermediate frequency signal to obtain a second scale conversion processing signal;
carrying out resonance processing on the second scale conversion processing signal to obtain a second resonance processing signal;
performing a modular squaring operation on the second resonance processing signal to obtain a second modular squaring signal;
and accumulating, summing and averaging the square signals according to the number N of the receiving decision points and the second modulus value to obtain a receiving signal demodulated by the second frequency hopping carrier signal.
Further, the decision mixing module is a one-out-of-three switch.
Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the embodiments of the present invention or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an energy receiving device for dual-sequence frequency hopping communication under low signal-to-noise ratio in the present invention;
FIG. 2 is a flow chart of an energy receiving method for dual sequence frequency hopping communications at low signal to noise ratio according to the present invention;
FIG. 3 is a schematic diagram of an energy receiving device for dual-sequence frequency hopping communication with low signal-to-noise ratio according to the present invention;
fig. 4 is a diagram showing a relationship between a symbol rate and a decision point number N according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in an energy receiving device for dual-sequence frequency hopping communication under low signal-to-noise ratio in fig. 1, the energy receiving device includes a signal receiving module, a first frequency hopping module, a second frequency hopping module, and a decision mixing module.
The signal receiving module is used for receiving radio frequency signals sent by an antenna and respectively sending the radio frequency signals to the first frequency hopping module and the second frequency hopping module;
the first frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a first frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the first frequency hopping carrier signal to the decision mixing module;
the second frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a second frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the second frequency hopping carrier signal to the decision mixing module;
the decision mixing module is configured to receive the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, sample and decide the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, and then combine the demodulated received signals to generate a received symbol.
It should be understood that in the dual-sequence frequency hopping communication mode, by taking the idea of "channel, i.e. message" as a reference, two groups of frequency hopping carrier channels controlled by pseudo-random sequences are selected through transmission symbols 0 and 1 respectively, the selected channel is used as a communication channel, the unselected channel is used as a dual channel, and the receiving end judges the transmitted symbols by detecting the channel occupation condition. Stochastic resonance is taken as a nonlinear physical phenomenon, when signals, noise and an SR system are matched, the noise can play a positive role in enhancing signal detection through the nonlinear system, and the method is widely applied to signal processing scenes under low signal-to-noise ratio; meanwhile, due to the characteristics of a stochastic resonance system, the input signals are required to be in signal forms of single-frequency sinusoidal signals, pulse signals, multi-frequency sinusoidal signals and the like.
The dual-sequence frequency hopping communication mode loads information on radio frequency, and generally adopts a superheterodyne mode for receiving, and intermediate frequency signals received by two branches are sinusoidal signals; the intermediate frequency signal meets the input requirement of the stochastic resonance system and can be used as the input signal of the stochastic resonance system. The stochastic resonance system is applied to the reception of the dual-sequence frequency hopping communication signals, so that the lower limit of the receiving signal-to-noise ratio of the dual-sequence frequency hopping communication mode can be further expanded, and the reliability of the dual-sequence frequency hopping communication mode is improved. In order to solve the problem of receiving dual-sequence frequency hopping signals in stochastic resonance processing, the above embodiment provides an energy detection receiver structure for dual-sequence frequency hopping communication under low signal-to-noise ratio.
Based on the above embodiment, further, the signal receiving module includes a radio frequency processing circuit.
The radio frequency processing circuit is used for respectively transmitting radio frequency signals to the first frequency hopping module and the second frequency hopping module.
Further, the first frequency hopping module comprises a first mixing processing unit, a first band-pass filtering processing unit, a first scale conversion unit, a first satellite resonance unit, a first modulus squaring circuit and a first accumulation summation averaging processing circuit;
said firstA mixing processing unit for receiving the RF signal and based on the RF signal and the first pseudo random sequence FS 0 Generating a first carrier branch signal, receiving an intermediate frequency signal frequency f based on the first carrier branch signal and superheterodyne 0 And obtaining a first mixed signal and sending the first mixed signal to the first band-pass filtering processing unit.
The first band-pass filtering processing unit is used for carrying out band-pass filtering on the first mixed signal to obtain a first intermediate frequency signal, and sending the first intermediate frequency signal to the first scale conversion unit.
The first scale conversion unit is used for obtaining a first scale conversion processing signal after performing scale conversion processing on the first intermediate frequency signal, and sending the first scale conversion processing signal to the first satellite resonance unit.
The first satellite wave resonance unit is used for carrying out resonance processing on the first scale transformation processing signal to obtain a first resonance processing signal, and sending the first resonance processing signal to the first module value squaring circuit.
The first module value squaring circuit is used for performing module value squaring operation on the first resonance processing signal to obtain a first module value squaring signal, and sending the first module value squaring signal to the first accumulation summation averaging processing circuit.
The first accumulation and summation average processing circuit is used for carrying out accumulation and summation average according to the number N of the received decision points and the first modulus square signal to obtain a demodulated received signal of the first frequency hopping carrier signal.
Further, the second frequency hopping module comprises a second mixing processing unit, a second band-pass filtering processing unit, a second scale conversion unit, a second satellite resonance unit, a second modulus value squaring circuit and a second accumulation summation averaging processing circuit.
The second mixing processing unit is used for receiving the radio frequency signal and according to the radio frequency signal and a second pseudo random sequence FS 1 Generating a second carrier branch signal based on the second carrier branch signalCarrier branch signal and superheterodyne receiving intermediate frequency signal frequency f 1 And obtaining a second mixed signal, and sending the second mixed signal to the second band-pass filtering processing unit.
The second band-pass filtering processing unit is used for carrying out band-pass filtering on the second mixed signal to obtain a second intermediate frequency signal, and sending the second intermediate frequency signal to the second scale conversion unit.
The second scale conversion unit is used for obtaining a second scale conversion processing signal after performing scale conversion processing on the second intermediate frequency signal, and sending the second scale conversion processing signal to the second satellite resonance unit.
And the second satellite wave resonance unit is used for carrying out resonance processing on the second scale conversion processing signal to obtain a second resonance processing signal, and sending the second resonance processing signal to the second modulus squaring circuit.
The second module square taking circuit is used for obtaining a second module square taking signal after the second resonance processing signal is subjected to module square taking operation, and sending the second module square taking signal to the second accumulation summation average processing circuit.
And the second accumulation and summation average processing circuit is used for carrying out accumulation and summation average on the square signal according to the number N of the receiving decision points and the second modulus value to obtain a demodulation receiving signal of the second frequency hopping carrier signal.
Further, the decision mixing module is a one-out-of-three switch.
It should be appreciated that the above embodiments solve the problem of receiving dual-sequence frequency-hopping communication signals by stochastic resonance, and thus provide an energy detection receiver structure that can be used for dual-sequence frequency-hopping communication at low signal-to-noise ratio, and provide new possibilities for receiving dual-sequence frequency-hopping signals at low signal-to-noise ratio.
As shown in fig. 3, the received signal is received by the antenna and the RF unit, and then is respectively combined with two pseudo-random sequences FS 0 Or FS 1 Generated carrier segment … f 3 -f 0 f 4 -f 0 f 2 -f 0 f 1 -f 0 … and … f 2 -f 0 f 1 -f 0 f 3 -f 0 f 4 -f 0 …, with a difference frequency f 0 (1kHz<f 0 <100 MHz) to obtain an intermediate frequency signal, the intermediate frequency signal is subjected to scale conversion treatment by a scale conversion unit ST after being subjected to band-pass filtration by a band-pass filter BF, and then is subjected to resonance treatment by a stochastic resonance unit SR; after the output result is subjected to N-value accumulation and summation and averaging, the two branches perform subtraction operation, and the output result is used as the input of the three-one switch. When the voltage is greater than 0, the switch outputs 0; less than 0, the switch outputs 1. The resulting received symbol fragment … 1010 ….
The communication rate of dual-sequence frequency-hopping communication at low signal-to-noise ratio is related to the frequency of the superheterodyne received intermediate frequency signal in the energy detection receiver,
as shown in fig. 4, the energy detection receiver for processing the dual-sequence frequency hopping signal by stochastic resonance under low signal-to-noise ratio adopts a wave crest-wave trough judgment mode. When n=1, the symbol time is 1 intermediate frequency signal period, i.e. ensuring that the peaks-troughs each appear 1 time; when n=4, one symbol time must last for 4 periods, i.e., ensure that the peak-trough occurs 4 times each; when N is greater, the symbol time is longer.
If N is increased, namely the number of effective judgment points is increased, the number of the wave crests-wave troughs which can be judged is increased; at the intermediate frequency signal frequency f 0 A timing, as N increases, resulting in an increase in symbol duration, i.e., a decrease in code rate; and at this time the code rate is f 0 N. This decision idea is similar to the same symbol repeating N transmissions, i.e. exchanging reliability with validity. Meanwhile, for the dual sequence communication mode, symbol information is represented by the presence or absence of two hopping sequences, namely, the symbol rate is the hopping speed; and the code element rate can only be 1/N of the superheterodyne intermediate frequency, so under the constraint of a wave crest-wave trough judgment technology system, the jump speed of the dual-sequence frequency hopping communication mode is 1/N of the superheterodyne intermediate frequency.
It will be appreciated that the frequency f of the superheterodyne receiving intermediate frequency signal 0 ，f 0 =10mhz, setting the number of reception decision points N, n=200, calculating the communication code rate
The energy receiving device for dual-sequence frequency hopping communication under low signal-to-noise ratio provided by the embodiment comprises a signal receiving module, a first frequency hopping module, a second frequency hopping module and a decision mixing module; the signal receiving module is used for receiving radio frequency signals sent by an antenna and respectively sending the radio frequency signals to the first frequency hopping module and the second frequency hopping module; the first frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a first frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the first frequency hopping carrier signal to the decision mixing module; the second frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a second frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the second frequency hopping carrier signal to the decision mixing module; the decision mixing module is configured to receive the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, sample and decide the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, and then combine the demodulated received signals to generate a received symbol. Aiming at the problem of receiving the dual-sequence frequency hopping communication signal by stochastic resonance processing, the invention provides an energy receiver which can be used for dual-sequence frequency hopping communication under low signal-to-noise ratio by combining the characteristics of the output signal of the dual-sequence frequency hopping signal by stochastic resonance processing, and provides new possibility for receiving the dual-sequence frequency hopping signal under low signal-to-noise ratio. The energy receiver for the dual-sequence frequency hopping signal under the low signal-to-noise ratio is established, the reception of the dual-sequence frequency hopping signal under the low signal-to-noise ratio can be effectively completed, and new reference and reference can be provided for the reception of the dual-sequence frequency hopping signal under the low signal-to-noise ratio.
As shown in fig. 2, an energy receiving method for dual-sequence frequency hopping communication under low signal-to-noise ratio includes the following steps:
110. the signal receiving module receives radio frequency signals sent by the antenna and sends the radio frequency signals to the first frequency hopping module and the second frequency hopping module respectively.
120. The first frequency hopping module receives the radio frequency signal, generates a demodulation receiving signal of a first frequency hopping carrier signal according to the radio frequency signal, and sends the demodulation receiving signal of the first frequency hopping carrier signal to the decision mixing module.
130. The second frequency hopping module receives the radio frequency signal, generates a demodulation receiving signal of a second frequency hopping carrier signal according to the radio frequency signal, and sends the demodulation receiving signal of the second frequency hopping carrier signal to the decision mixing module.
140. The decision mixing module receives the demodulation receiving signal of the first frequency hopping carrier signal and the demodulation receiving signal of the second frequency hopping carrier signal, samples and decides the demodulation receiving signal of the first frequency hopping carrier signal and the demodulation receiving signal of the second frequency hopping carrier signal, and then combines the signals to generate a receiving code element.
Further, the signal receiving module includes a radio frequency processing circuit, and step 110 further includes:
the radio frequency processing circuit sends radio frequency signals to the first frequency hopping module and the second frequency hopping module respectively.
Further, step 120 specifically includes:
receiving the radio frequency signal and according to the radio frequency signal and the first pseudo random sequence FS 0 Generating a first carrier branch signal, receiving an intermediate frequency signal frequency f based on the first carrier branch signal and superheterodyne 0 A first mixed signal is obtained.
And carrying out band-pass filtering on the first mixed signal to obtain a first intermediate frequency signal.
And performing scale conversion processing on the first intermediate frequency signal to obtain a first scale conversion processing signal.
And carrying out resonance processing on the first scale conversion processing signal to obtain a first resonance processing signal.
And carrying out a module value squaring operation on the first resonance processing signal to obtain a first module value squaring signal.
And the first accumulation summation average processing circuit is used for carrying out accumulation summation average according to the number N of the received decision points and the first modulus square signal to obtain a received signal demodulated by the first frequency hopping carrier signal.
Further, step 130 specifically includes:
receiving the radio frequency signal and according to the radio frequency signal and the second pseudo random sequence FS 1 Generating a second carrier branch signal, receiving an intermediate frequency signal frequency f based on the second carrier branch signal and superheterodyne 1 A second mixed signal is obtained.
And carrying out band-pass filtering on the second mixed signal to obtain a second intermediate frequency signal.
And performing scale conversion processing on the second intermediate frequency signal to obtain a second scale conversion processing signal.
And carrying out resonance processing on the second scale conversion processing signal to obtain a second resonance processing signal.
And carrying out a module value squaring operation on the second resonance processing signal to obtain a second module value squaring signal.
And accumulating, summing and averaging the square signals according to the number N of the receiving decision points and the second modulus value to obtain a receiving signal demodulated by the second frequency hopping carrier signal.
Further, the decision mixing module is a one-out-of-three switch.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown 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 units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium.
Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (6)
1. An energy receiving device for dual-sequence frequency hopping communication under low signal-to-noise ratio is characterized by comprising a signal receiving module, a first frequency hopping module, a second frequency hopping module and a decision mixing module;
the signal receiving module is used for receiving radio frequency signals sent by an antenna and respectively sending the radio frequency signals to the first frequency hopping module and the second frequency hopping module;
the first frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a first frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the first frequency hopping carrier signal to the decision mixing module;
the second frequency hopping module is configured to receive the radio frequency signal, generate a demodulated received signal of a second frequency hopping carrier signal according to the radio frequency signal, and send the demodulated received signal of the second frequency hopping carrier signal to the decision mixing module;
the decision mixing module is configured to receive the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, sample and decide the demodulated received signal of the first frequency-hopping carrier signal and the demodulated received signal of the second frequency-hopping carrier signal, and then combine the demodulated received signals to generate a received symbol;
the first frequency hopping module comprises a first mixing processing unit, a first band-pass filtering processing unit, a first scale conversion unit, a first satellite resonance unit, a first modulus squaring circuit and a first accumulation summation averaging processing circuit;
the first mixing processing unit is configured to receive the radio frequency signal and to generate a first pseudo-random sequence FS according to the radio frequency signal 0 Generating a first carrier branch signal, receiving an intermediate frequency signal frequency f based on the first carrier branch signal and superheterodyne 0 Obtaining a first mixed signal and sending the first mixed signal to the first band-pass filtering processing unit;
the first band-pass filtering processing unit is used for carrying out band-pass filtering on the first mixed signal to obtain a first intermediate frequency signal, and sending the first intermediate frequency signal to the first scale conversion unit;
the first scale conversion unit is used for performing scale conversion on the first intermediate frequency signal to obtain a first scale conversion processing signal, and sending the first scale conversion processing signal to the first satellite resonance unit;
the first satellite wave resonance unit is used for carrying out resonance processing on the first scale transformation processing signal to obtain a first resonance processing signal, and sending the first resonance processing signal to the first module value squaring circuit;
the first module value squaring circuit is used for performing module value squaring operation on the first resonance processing signal to obtain a first module value squaring signal, and sending the first module value squaring signal to the first accumulation summation averaging processing circuit;
the first accumulation and summation average processing circuit is used for carrying out accumulation and summation average on the square signal according to the number N of the received decision points and the first modulus value to obtain a received signal demodulated by the first frequency hopping carrier signal;
the second frequency hopping module comprises a second mixing processing unit, a second band-pass filtering processing unit, a second scale conversion unit, a second satellite resonance unit, a second modulus squaring circuit and a second accumulation summation averaging processing circuit;
the second mixing processing unit is used for receiving the radio frequency signal and according to the radio frequency signal and a second pseudo random sequence FS 1 Generating a second carrier branch signal, receiving an intermediate frequency signal frequency f based on the second carrier branch signal and superheterodyne 1 Obtaining a second mixed signal, and sending the second mixed signal to the second band-pass filtering processing unit;
the second band-pass filtering processing unit is used for carrying out band-pass filtering on the second mixed signal to obtain a second intermediate frequency signal, and sending the second intermediate frequency signal to the second scale conversion unit;
the second scale conversion unit is used for performing scale conversion on the second intermediate frequency signal to obtain a second scale conversion processing signal, and sending the second scale conversion processing signal to the second satellite resonance unit;
the second satellite wave resonance unit is used for carrying out resonance processing on the second scale conversion processing signal to obtain a second resonance processing signal, and sending the second resonance processing signal to the second module value squaring circuit;
the second module squaring circuit is used for performing module squaring operation on the second resonance processing signal to obtain a second module squaring signal, and sending the second module squaring signal to the second accumulation summation averaging processing circuit;
and the second accumulation summation average processing circuit is used for carrying out accumulation summation average on the square signal according to the number N of the received decision points and the second modulus value to obtain a received signal demodulated by the second frequency hopping carrier signal.
2. The energy receiving device for dual sequence frequency hopping communications at low signal to noise ratio as set forth in claim 1, wherein,
the signal receiving module comprises a radio frequency processing circuit;
the radio frequency processing circuit is used for respectively transmitting radio frequency signals to the first frequency hopping module and the second frequency hopping module.
3. The energy receiving device for dual sequence frequency hopping communications at low signal to noise ratio of claim 1, wherein the decision mixing module is a one-out-of-three switch.
4. An energy receiving method for dual sequence frequency hopping communications at low signal to noise ratios, comprising:
the signal receiving module receives radio frequency signals sent by the antenna and sends the radio frequency signals to the first frequency hopping module and the second frequency hopping module respectively;
the first frequency hopping module receives the radio frequency signal, generates a demodulation receiving signal of a first frequency hopping carrier signal according to the radio frequency signal, and sends the demodulation receiving signal of the first frequency hopping carrier signal to the decision mixing module;
the second frequency hopping module receives the radio frequency signal, generates a demodulation receiving signal of a second frequency hopping carrier signal according to the radio frequency signal, and sends the demodulation receiving signal of the second frequency hopping carrier signal to the decision mixing module;
the decision mixing module receives the demodulation receiving signal of the first frequency hopping carrier signal and the demodulation receiving signal of the second frequency hopping carrier signal, samples and decides the demodulation receiving signal of the first frequency hopping carrier signal and the demodulation receiving signal of the second frequency hopping carrier signal, and then combines the signals to generate a receiving code element;
the generating a first frequency hopping carrier signal according to the radio frequency signal specifically includes:
receiving the radio frequency signal and according to the radio frequency signal and the first pseudo random sequence FS 0 Generating a first carrier branch signal, receiving an intermediate frequency signal frequency f based on the first carrier branch signal and superheterodyne 0 Obtaining a first mixed signal;
band-pass filtering the first mixed signal to obtain a first intermediate frequency signal;
performing scale conversion processing on the first intermediate frequency signal to obtain a first scale conversion processing signal;
carrying out resonance processing on the first scale conversion processing signal to obtain a first resonance processing signal;
performing a module value squaring operation on the first resonance processing signal to obtain a first module value squaring signal;
the first accumulation and summation averaging processing circuit is used for carrying out accumulation and summation averaging according to the number N of the received decision points and the first modulus squaring signal to obtain a received signal demodulated by the first frequency hopping carrier signal;
the generating a second frequency hopping carrier signal according to the radio frequency signal specifically includes:
receiving the radio frequency signal and according to the radio frequency signal and the second pseudo random sequence FS 1 Generating a second carrier branch signal based on the second carrier branch signal and in superheterodyne receptionFrequency of frequency signal f 1 Obtaining a second mixed signal;
band-pass filtering the second mixed signal to obtain a second intermediate frequency signal;
performing scale conversion processing on the second intermediate frequency signal to obtain a second scale conversion processing signal;
carrying out resonance processing on the second scale conversion processing signal to obtain a second resonance processing signal;
performing a modular squaring operation on the second resonance processing signal to obtain a second modular squaring signal;
and accumulating, summing and averaging according to the number N of the receiving decision points and the square signal of the second modulus value to obtain a receiving signal demodulated by the second frequency hopping carrier signal.
5. The method of energy reception for dual sequence frequency hopping communications at low signal to noise ratio of claim 4, wherein said signal receiving module comprises a radio frequency processing circuit, said method further comprising:
the radio frequency processing circuit sends radio frequency signals to the first frequency hopping module and the second frequency hopping module respectively.
6. The method for energy reception for dual sequence frequency hopping communications at low signal to noise ratio of claim 4, wherein said decision mixing module is a one-out-of-three switch.
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