CN113794499B - Mars detector relay communication code rate self-adaption system and method - Google Patents

Mars detector relay communication code rate self-adaption system and method Download PDF

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CN113794499B
CN113794499B CN202111014179.2A CN202111014179A CN113794499B CN 113794499 B CN113794499 B CN 113794499B CN 202111014179 A CN202111014179 A CN 202111014179A CN 113794499 B CN113794499 B CN 113794499B
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code rate
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mars
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CN113794499A (en
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何春黎
王民建
王献忠
朱新波
牛俊坡
褚英志
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Shanghai Institute of Satellite Engineering
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
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    • H04B7/18502—Airborne stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
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    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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Abstract

The invention provides a relay communication code rate self-adaption system and a relay communication code rate self-adaption method for a Mars detector, wherein the relay communication code rate self-adaption system comprises the following modules: module M1: the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the signal sent by the relay communication machine of the Mars vehicle to obtain an evaluation result; module M2: performing association processing according to the evaluation result and a demodulation threshold of a relay communication machine of the surrounding device, and confirming a processing identifier; a module M3; and adjusting the code rate according to the processing identification by the relay communication machine of the surrounding device, correspondingly adjusting the code rate by the relay communication machine of the Mars, and carrying out relay communication by the relay communication machine of the surrounding device and the relay communication machine of the Mars under the adjusted code rate. The invention adjusts the working state of the communication machine in time through the feedback of the environment change of the external channel, selects the optimal communication scheme under the condition of ensuring normal demodulation, realizes the maximization of information transmission, has no intervention of the ground in the whole process, and has high autonomy.

Description

Mars detector relay communication code rate self-adaption system and method
Technical Field
The invention relates to the technical field of deep space exploration relay communication, in particular to a spark detector relay communication code rate self-adaption system and method. And more particularly, to a code rate adaptive design method for communicating with a surround relay after a spark detector fires.
Background
The deep space exploration is different from other space tasks and is characterized by the following: the environment is more complex, the sensitivity of instruments and equipment is higher, the long distance is realized, the time delay is large, and the autonomous management and the adaptability are high. Taking the Mars detection task as an example, the farthest distance from the earth after the Mars detector is captured by Mars can reach 4 hundred million kilometers, and the maximum time delay single pass also reaches 20 minutes according to the calculation of optical time. When the Mars vehicle works on the Mars surface, the surrounding device is mainly used as a relay satellite to realize command uploading, telemetering downloading and scientific data transmission with the ground. However, because of the star shielding, each Mars day has a limited communication arc between the circulator and the Mars vehicle, and in order to transmit more precious scientific data in the limited arc as much as possible, the highest code rate is required to be used for transmission under the condition of well established communication. Once the relay communication is interrupted, the ground instruction can not be received on the device in time to reestablish the communication process or the data quantity is insufficient due to missing the optimal communication arc segment after reestablishing in the face of large time delay caused by the ultra-long distance.
Related technology: chinese patent publication No. CN1883150a discloses a power-based rate adaptation of wireless communication channels, a Radio Base Station (RBS) providing dynamic rate adaptation for adjustable rate communication channels used to transmit information to remote mobile stations based on monitoring transmit power information associated with those channels. For a given channel, the RBS tracks the average channel power on a per transmitted frame basis and compares the average to first and second rate adjustment thresholds, the comparison triggering a rate drop or rise adjustment. Similar operations may also be based on averaging power control commands returned by the mobile station, which indicates whether the power of the channel received by the mobile station is sufficient relative to the desired signal quality. This method thus provides a mechanism for fast rate adaptation without explicit rate control signaling from the mobile station. The patent document proposes a method for managing a communication channel with a variable data rate in a wireless communication network, focusing on autonomously detecting the channel in case of actively changing the rate, thereby changing the power to adapt to the conversion requirement of the code rate, without involving adaptive change of the code rate.
The Chinese patent document with publication number of CN107040486A discloses a QPSK demodulation system and method with self-adaption of any code rate, which are used for solving the technical problems that the existing multi-gear code rate self-adaption demodulation system is poor in adaptability and the sampling rate of the existing demodulation method is low in utilization rate; the system comprises a data acquisition module, an optimal sampling rate selection module, a filter coefficient generation module, a self-adaptive Costas loop module, a resampling module and a bit synchronization judgment output module, wherein the data acquisition module and the optimal sampling rate selection module form a closed loop structure; the implementation method comprises the following steps: sampling the analog modulation signal at the highest sampling rate to obtain a high-speed digital signal; estimating a code rate of the high-speed digital signal; calculating an optimal sampling frequency; sampling the analog modulation signal at an optimal sampling frequency to obtain a low-speed digital signal; digital down-conversion and low-pass filtering are carried out on the low-speed digital signal; extracting integer multiples of the filtered signal; and performing bit synchronization on the extracted signal, and finally judging and outputting to obtain an original code element. The method mainly aims at a QPSK demodulation system with self-adaptive random code rate, and does not involve the self-adaptive switching of the code rate according to the channel characteristics.
The Chinese patent document with publication number of CN108988930A discloses a satellite laser communication subsystem communication rate self-adaptive control method and system, wherein the system comprises a ground pulse light emitting module, a back light detecting module and a data processing and feedback module; the ground pulse light emitting module comprises a pulse laser emitter and an erbium-doped optical fiber amplifier, wherein the ground pulse light emitting module is a non-signal light and is only used as a test light path to detect atmospheric loss; the back light detection module comprises a detector and a data acquisition card, when the emitted laser pulse is transmitted in a free channel, the detector detects back scattered light of the emitted pulse light, and the data acquisition card acquires the power of the back scattered light detected by the detector in real time; the data processing and feedback module is a computer. The patent document designs a satellite laser communication subsystem communication rate self-adaptive control system which is mainly applied to laser communication and does not involve code rate self-adaptive switching according to channel characteristics.
The Chinese patent document with publication number of CN109547090A discloses a method for adaptively adjusting the satellite relay data transmission communication rate, and aims to provide a transmission method which has low delay and reliable transmission and can effectively improve the data transmission throughput. The method is realized by the following technical scheme: in the flying process of the aircraft, a relay terminal beam pointing calculation module calculates the pointing alpha angle and the antenna pointing beta angle of a phased array antenna in real time and sends the pointing alpha angle and the antenna pointing beta angle into a data searching module, the data searching module uses the phased array antenna pointing alpha angle and the antenna pointing beta angle as searching addresses, searches and obtains the actual effective omnidirectional radiation power EIRP of the phased array antenna in real time from a memory of the relay terminal, sends the antenna actual EIRP into a threshold comparison criterion module, completes judgment of the actual EIRP and the link condition of the phased array antenna according to the antenna pointing alpha angle and the antenna pointing beta angle, completes judgment of the actual EIRP and the link condition of the phased array antenna, and completes self-adaptive adjustment of the communication rate according to the link condition.
Aiming at the related technology, the inventor considers that once relay communication interruption occurs in the method, the ground instruction can not be received by a device in time to reestablish the communication process or the downloading data quantity is insufficient due to missing the optimal communication arc segment after reestablishing in the face of large time delay caused by ultra-long distance.
Disclosure of Invention
In view of the drawbacks of the prior art, an object of the present invention is to provide a system and method for adaptive rate of active detector relay communication codes.
The invention provides a relay communication code rate self-adaptive system of a Mars detector, which comprises the following modules:
module M1: the system comprises a surrounding device and a Mars vehicle, wherein relay communicators are arranged on the surrounding device and the Mars vehicle; the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the signal sent by the relay communication machine of the Mars vehicle to obtain an evaluation result;
module M2: performing association processing according to the evaluation result and a demodulation threshold of a relay communication machine of the surrounding device, and confirming a processing identifier;
a module M3; and adjusting the code rate according to the processing identification by the relay communication machine of the surrounding device, correspondingly adjusting the code rate by the relay communication machine of the Mars, and carrying out relay communication by the relay communication machine of the surrounding device and the relay communication machine of the Mars under the adjusted code rate.
Preferably, in said module M1, the circulator and the mars establish duplex communication; the relay communication machine of the surrounding device tracks the signal sent by the relay communication machine of the Mars, and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the tracked signal in the current evaluation period to obtain an evaluation result;
in the module M2, performing association processing according to the evaluation result of the module M1 and a demodulation threshold under the current code rate of the relay communication machine of the surrounding device, and confirming a processing identifier;
in the module M3, according to the processing identifier in the module M2, the relay communicator of the circulator adjusts the code rate, and at the same time, the relay communicator of the circulator informs the relay communicator of the Mars, and the relay communicator of the Mars adjusts the code rate to correspond to the code rate of the relay communicator of the circulator; the relay communicator of the surrounding device and the relay communicator of the Mars vehicle perform relay communication at the adjusted code rate.
Preferably, the system further comprises a module M4: after the current evaluation period is over, the next evaluation period is entered, and the modules M1 to M3 are repeated until the communication is over.
Preferably, the module M1 comprises the following modules:
module M1.1: according to the effective signal power p received by the relay receiver of the circulator s And noise signal power P n Calculating signal-to-noise ratio SNR:
Figure BDA0003239274350000031
where lg represents the base 10 logarithm;
module M1.2: in the current evaluation period T, calculating a signal-to-noise ratio reference value SNR_avg in the current evaluation period T:
Figure BDA0003239274350000041
where t represents the time variable of the integration.
Preferably, the code rate of the relay communication machine is provided with n stages, and the ith stage code rate is expressed as V i ，0≤i≤n。
Preferably, in said module M2,
Figure BDA0003239274350000042
wherein F represents the processing identifier, and GATE is the demodulation threshold value corresponding to the code rate of the relay communication machine at the current T moment.
Preferably, if the processing identifier F is equal to the first predetermined value, the first code rate is adjusted up, if the processing identifier F is equal to the second predetermined value, the current code rate is maintained, and if the processing identifier F is equal to the third predetermined value, the first code rate is adjusted down.
The invention provides a relay communication code rate self-adaption method of a Mars detector, which comprises the following steps:
step S1: the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the signal sent by the relay communication machine of the Mars vehicle to obtain an evaluation result;
step S2: performing association processing according to the evaluation result and a demodulation threshold of a relay communication machine of the surrounding device, and confirming a processing identifier;
s3, a step of S3; and adjusting the code rate according to the processing identification by the relay communication machine of the surrounding device, correspondingly adjusting the code rate by the relay communication machine of the Mars, and carrying out relay communication by the relay communication machine of the surrounding device and the relay communication machine of the Mars under the adjusted code rate.
Preferably, in said step S1, the circulator and the Mars establish duplex communication; the relay communication machine of the surrounding device tracks the signal sent by the relay communication machine of the Mars, and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the tracked signal in the current evaluation period to obtain an evaluation result;
in the step S2, performing association processing according to the evaluation result in the step S1 and a demodulation threshold under the current code rate of the relay communication machine of the circulator, and confirming a processing identifier;
in the step S3, according to the processing identifier in the step S2, the relay communicator of the circulator adjusts the code rate, and at the same time, the relay communicator of the circulator informs the relay communicator of the Mars, and the relay communicator of the Mars adjusts the code rate to correspond to the code rate of the relay communicator of the circulator; the relay communicator of the surrounding device and the relay communicator of the Mars vehicle perform relay communication at the adjusted code rate.
Preferably, the method further comprises step S4: after the current evaluation period is ended, the next evaluation period is entered, and the steps S1 to S3 are repeated until the communication is ended.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through feedback of external channel environment change, the internal working state of the communication machine is adjusted in time, and under the condition of ensuring normal demodulation, the optimal communication scheme is selected, so that the maximization of information transmission is realized, the whole process is free from the intervention of the ground, and the design has high autonomy;
2. the invention can maximally transmit the detected data of the Mars surface to the earth through the code rate self-adaptive system;
3. the invention can provide highly reliable communication through code rate self-adaptive switching.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of an inter-device relay communication system according to the present invention;
fig. 2 is a code rate adaptation flow chart of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The embodiment of the invention discloses a spark detector relay communication code rate self-adaptive design system, which is characterized in that as shown in fig. 1 and 2, in a normal communication arc section, a surrounding device relay communication machine and a spark vehicle relay communication machine establish duplex communication through a duplex handshake protocol after setting communication states such as an initial working channel, an initial receiving and transmitting rate, a communication mode, a code rate and the like. The duplex protocol is a generic protocol.
The system comprises the following modules: module M1: the system comprises a surrounding device and a Mars vehicle, wherein relay communicators are arranged on the surrounding device and the Mars vehicle; and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the signal sent by the relay communication machine of the Mars vehicle to obtain an evaluation result. Establishing duplex communication between the circulator and the lander Mars; the relay communication machine of the surrounding device tracks the signal sent by the relay communication machine of the Mars, and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the tracked signal in the current evaluation period to obtain an evaluation result. After normal communication is established, the AGC module in the relay communication machine evaluates the signal-to-noise ratio of the tracking signal in one period. In an evaluation period T, an AGC module in the tracking module evaluates the signal-to-noise ratio SNR of the tracking signal and gives a signal-to-noise ratio reference value SNR_avg in the current period. The Chinese translation of AGC English, which is known as Automatic Gain Control, automatic Gain Control, is automatic gain control.
The signal-to-noise ratio evaluation is specifically as follows: the module M1 includes the following modules: module M1.1: according to the effective signal power p received by the relay receiver of the circulator s And noise signal power P n The signal-to-noise ratio SNR is calculated, i.e. the instantaneous signal-to-noise ratio SNR for the tracking signal at a certain moment is calculated as follows:
Figure BDA0003239274350000061
where lg denotes the base 10 logarithm.
Module M1.2: in the current evaluation period T, the signal-to-noise ratio reference value snr_avg in the current evaluation period T is calculated, that is, the signal-to-noise ratio reference value in the period T is calculated as follows:
Figure BDA0003239274350000062
where t represents the time variable of the integration.
Module M2: the relay communication machine comprises a demodulation threshold, and carries out association processing according to the evaluation result of the module M1 and the demodulation threshold under the current code rate of the relay communication machine of the surrounding device, and confirms the processing identification. And carrying out association processing according to the evaluated signal-to-noise ratio reference value in the module M1 and a demodulation threshold under the current code rate of the communication machine, and determining a processing identifier. The module M2 further comprises: comparing the signal-to-noise ratio reference value calculated in the formula (2) with a demodulation threshold under the working code rate of the communication machine in the current period T to obtain a processing identifier F for code rate adjustment, wherein the processing identifier F is as follows:
Figure BDA0003239274350000063
wherein F represents the processing identifier, and GATE is the demodulation threshold value corresponding to the communication machine code rate at the current moment.
Module M3: according to the processing identifier in the module M2, the relay communication machine of the circulator adjusts the code rate, and at the same time, the relay communication machine of the circulator informs the relay communication machine of the Mars, and the relay communication machine of the circulator informs through a forward feedback frame, wherein the feedback frame contains the adjusted code rate information. The relay communication machine of the Mars adjusts the code rate of the relay communication machine to correspond to the code rate of the relay communication machine of the surrounding device; the relay communicator of the surrounding device and the relay communicator of the Mars vehicle perform relay communication at the adjusted code rate. The wrapper relay communicator adjusts the code rate according to the processing identity in module M2 while informing the sender. The sender is here a Mars relay communicator, and only the rate adaptation of the return is referred to herein, i.e. only if the Mars is the sender, the circulator is the receiver, and the circulator is the master of the rate adjustment. Forward adaptation is a mars vehicle as the active party and does not involve the adaptation method herein. And adjusting the code rate to a new code rate, and then carrying out relay communication under the new code rate after self-adaptive adjustment.
If the processing identifier F is equal to the first preset value, the first gear rate is adjusted upwards, if the processing identifier F is equal to the second preset value, the current code rate is kept, and if the processing identifier F is equal to the third preset value, the first gear rate is adjusted downwards. According to the processing identifier in the module M2, the communication machine completes autonomous adjustment of the code rate, if f=1, the code rate is up-shifted, if f=0, the current code rate is maintained, and if f= -1, the code rate is down-shifted.
Module M4: after the current evaluation period is over, the next evaluation period is entered, and the modules M1 to M3 are repeated until the communication is over. And (3) after one evaluation period is ended, entering the next period, and repeating the modules M1 to M3 until the communication is ended.
The communicator may operate at multiple code rates to accommodate channel environments in complex and large dynamics of the spark. The code rate of the relay communication machine is provided with n gears, and the ith gear code rate is expressed as V i I is more than or equal to 0 and less than or equal to n, i is more than or equal to 0,1 and n. Each gear rate is a multiple relationship, n can be set by the communication requirement, and is from 0 to the lowest gear, n to the highest gear, V i ＝2V i-1 。
The invention can cope with complex Mars channel environment, when the external environment changes, the relay communication can timely adjust the current working state, and the relay communication can be completed by selecting the most suitable code rate. Under normal conditions, the communication time of the Mars surrounding device and the Mars vehicle for one-time near-fire relay is only about 10 minutes, the communication distance is greatly changed, and the detected data on the Mars surface can be maximally transmitted to the earth through the code rate self-adaptive system. When the deep space long-distance relay communication is carried out, the ground cannot be controlled, the channel is influenced by a plurality of unknown factors on the ground, and the high-reliability communication can be provided through code rate self-adaptive switching.
The embodiment of the invention also provides a method for adaptively designing the relay communication code rate of the Mars detector, which is shown in fig. 1 and 2 and comprises the following steps: step S1: and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the signal sent by the relay communication machine of the Mars vehicle to obtain an evaluation result. Establishing duplex communication between the surrounding device and the Mars; the relay communication machine of the surrounding device tracks the signal sent by the relay communication machine of the Mars, and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the tracked signal in the current evaluation period to obtain an evaluation result.
Step S2: and carrying out association processing according to the evaluation result and the demodulation threshold of the relay communication machine of the surrounding device, and confirming the processing identification. And (3) carrying out association processing according to the evaluation result of the step (S1) and a demodulation threshold under the current code rate of the relay communication machine of the surrounding device, and confirming a processing identifier.
S3, a step of S3; and adjusting the code rate according to the processing identification by the relay communication machine of the surrounding device, correspondingly adjusting the code rate by the relay communication machine of the Mars, and carrying out relay communication by the relay communication machine of the surrounding device and the relay communication machine of the Mars under the adjusted code rate. According to the processing identifier in the step S2, the relay communication machine of the surrounding device adjusts the code rate, and meanwhile, the relay communication machine of the surrounding device informs the relay communication machine of the Mars, and the relay communication machine of the Mars adjusts the code rate to correspond to the code rate of the relay communication machine of the surrounding device; the relay communicator of the surrounding device and the relay communicator of the Mars vehicle perform relay communication at the adjusted code rate.
Step S4: after the current evaluation period is ended, the next evaluation period is entered, and the steps S1 to S3 are repeated until the communication is ended.
The invention mainly comprises the following four aspects: 1. an AGC module within the communication machine evaluates the signal to noise ratio of the signal. 2. And comparing the signal-to-noise ratio obtained through evaluation with the signal-to-noise ratio under the current code rate demodulation threshold to obtain a processing identifier. 3. And adjusting the current code rate according to the processing identifier. 4. Repeating 1-3 until the communication is finished. The invention adjusts the working state of the communication machine in time through the feedback of the environment change of the external channel, and selects the optimal communication scheme under the condition of ensuring normal demodulation, thereby realizing the maximization of information transmission. The whole process has no intervention of the ground, and the design has high autonomy. The invention aims to realize multi-code rate autonomous switching when the communication working condition is changed dynamically when the Mars detect relay communication.
Those skilled in the art will appreciate that the invention provides a system and its individual devices, modules, units, etc. that can be implemented entirely by logic programming of method steps, in addition to being implemented as pure computer readable program code, in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units for realizing various functions included in the system can also be regarded as structures in the hardware component; means, modules, and units for implementing the various functions may also be considered as either software modules for implementing the methods or structures within hardware components.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (8)

1. A spark detector relay communication code rate adaptive system comprising the following modules:
signal-to-noise ratio evaluation module: the system comprises a circulator and a Mars vehicle, wherein relay communicators are arranged on the circulator and the Mars vehicle; the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the signal sent by the relay communication machine of the Mars vehicle to obtain an evaluation result;
and the association processing module is used for: performing association processing according to the evaluation result and a demodulation threshold of a relay communication machine of the surrounding device, and confirming a processing identifier;
a relay communication module; according to the processing identification, the relay communication machine of the surrounding device adjusts the code rate, the relay communication machine of the Mars vehicle correspondingly adjusts the code rate, and the relay communication machine of the surrounding device and the relay communication machine of the Mars vehicle carry out relay communication under the adjusted code rate;
in the signal-to-noise ratio evaluation module, establishing duplex communication between the circulator and the Mars; the relay communication machine of the surrounding device tracks the signal sent by the relay communication machine of the Mars, and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the tracked signal in the current evaluation period to obtain an evaluation result;
in the association processing module, carrying out association processing according to the evaluation result of the signal-to-noise ratio evaluation module and a demodulation threshold under the current code rate of the relay communication machine of the surrounding device, and confirming a processing identifier;
in the relay communication module, according to the processing identification in the association processing module, the relay communication machine of the surrounding device adjusts the code rate, meanwhile, the relay communication machine of the surrounding device informs the relay communication machine of the Mars, and the relay communication machine of the Mars adjusts the code rate to correspond to the code rate of the relay communication machine of the surrounding device; the relay communicator of the surrounding device and the relay communicator of the Mars vehicle perform relay communication at the adjusted code rate.
2. The spark detector relay communication code rate adaptation system of claim 1, further comprising a repetition evaluation module: after the current evaluation period is ended, entering the next evaluation period, and repeatedly executing the signal-to-noise ratio evaluation module, the association processing module and the relay communication module until the communication is ended.
3. The spark detector relay communication code rate adaptation system of claim 1, wherein the signal-to-noise ratio evaluation module comprises:
and a signal-to-noise ratio calculation module: based on the effective signal power received by the relay communication machine of the surrounding device
Figure QLYQS_1
And noise signal power
Figure QLYQS_2
Calculating the signal to noise ratio +.>
Figure QLYQS_3
：
Figure QLYQS_4
Where lg represents the base 10 logarithm;
and the signal-to-noise ratio reference value calculation module is used for: in the current evaluation period T, calculating a signal-to-noise ratio reference value in the current evaluation period T
Figure QLYQS_5
：
Figure QLYQS_6
Figure QLYQS_7
Wherein the method comprises the steps of
Figure QLYQS_8
The time variable representing the integration.
4. The adaptive system of the relay communication code rate of the Mars probe according to claim 1, wherein the code rates of the relay communication machine on the circulator and the relay communication machine on the Mars are provided with n-th gear, and the i-th gear code rate is expressed as V i ，0≤i≤n。
5. The spark detector relay communication code rate adaptation system of claim 1, wherein: in the association processing module, the processing module is configured to,
Figure QLYQS_9
wherein the method comprises the steps ofFThe process identity is represented by a process identity,GATEdecoding under code rate correspondence of relay communication machine for current T moment surrounding deviceAnd (5) regulating a threshold value.
6. The spark detector relay communication code rate adaptive system of claim 5 wherein if processing the identificationFIf the first preset value is equal to the first preset value, the relay communication machine of the surrounding device adjusts a gear rate, if the processing identificationFIf the second code rate is equal to the second preset value, the relay communication machine of the surrounding device keeps the current code rate, if the identification is processedFEqual to the third predetermined value, the relay communicator of the wrapper down-regulates a code rate.
7. A spark detector relay communication code rate adaptive method, characterized in that the spark detector relay communication code rate adaptive system according to any one of claims 1-6 is applied, comprising the steps of:
step S1: the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the signal sent by the relay communication machine of the Mars vehicle to obtain an evaluation result;
step S2: performing association processing according to the evaluation result and a demodulation threshold of a relay communication machine of the surrounding device, and confirming a processing identifier;
s3, a step of S3; according to the processing identification, the relay communication machine of the surrounding device adjusts the code rate, the relay communication machine of the Mars vehicle correspondingly adjusts the code rate, and the relay communication machine of the surrounding device and the relay communication machine of the Mars vehicle carry out relay communication under the adjusted code rate;
in said step S1, the circulator establishes duplex communication with the mars; the relay communication machine of the surrounding device tracks the signal sent by the relay communication machine of the Mars, and the relay communication machine of the surrounding device evaluates the signal-to-noise ratio of the tracked signal in the current evaluation period to obtain an evaluation result;
in the step S2, performing association processing according to the evaluation result in the step S1 and a demodulation threshold under the current code rate of the relay communication machine of the circulator, and confirming a processing identifier;
in the step S3, according to the processing identifier in the step S2, the relay communicator of the circulator adjusts the code rate, and at the same time, the relay communicator of the circulator informs the relay communicator of the Mars, and the relay communicator of the Mars adjusts the code rate to correspond to the code rate of the relay communicator of the circulator; the relay communicator of the surrounding device and the relay communicator of the Mars vehicle perform relay communication at the adjusted code rate.
8. The method for adaptive communication code rate relay of a Mars detector as claimed in claim 7, further comprising step S4: after the current evaluation period is ended, the next evaluation period is entered, and the steps S1 to S3 are repeated until the communication is ended.
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