Terminal general processing resource allocation architecture suitable for multi-system satellite communication waveform

Abstract

The invention discloses a terminal general processing resource allocation architecture suitable for multi-system satellite communication waveforms. The architecture comprises intermediate frequency preprocessing resource evaluation, baseband processing resource evaluation, protocol processing resource evaluation and internal and external interface resource evaluation. And allocating a filtering bandwidth, a receiving level, an analog transceiving channel, a baseband processing resource, a protocol processing resource and an internal and external interface resource. Through intermediate frequency preprocessing resource evaluation, baseband processing resource evaluation, protocol processing resource evaluation and internal and external interface resource evaluation, a terminal product developed based on the method can support switching operation of various satellite communication system waveforms, the number of terminals is reduced, and the development and maintenance cost of the terminal product in the whole life cycle is reduced; and hardware resource configuration and maintenance support equipment are reduced, and the use and maintenance support pressure is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of satellite communication terminal design of avionics information, and is an implementation method of a terminal general processing resource allocation architecture supporting multi-system satellite communication waveform time-sharing switching operation and facing multi-system satellite communication waveform (relative to traditional single-system). BACKGROUND

[0002] The aviation satellite communication is developing towards the technical direction of platform generalization and task collaboration. As the core component of aviation satellite communication, the airborne satellite communication terminal is playing an increasingly important role in military and civil aviation long-distance communication collaboration.

[0003] The current satellite communication system has developed into a network covering various satellite systems in high, medium and low orbits, which should meet the application requirements of various terminal users such as long-distance, all-weather, all-day, multi-frequency and anti-interference. The traditional satellite communication user terminal usually supports single-system satellite communication function operation, or supports double-system satellite communication function operation through configuration of heterogeneous channel resources. Today, with the rapid development of various satellite systems in high, medium and low orbits, the traditional satellite communication user terminal cannot meet the user's demand for flexible and efficient transmission of communication services due to the limitation of single-system satellite communication resources. It is necessary to flexibly use multi-network satellite resources to meet the differentiated communication needs of terminal users, which poses a challenge to the multi-system compliance of the waveform processing resources of the satellite communication terminal. The use of a general processing resource allocation architecture for differentiated needs to design a satellite communication terminal that can be flexibly configured will largely solve the above problems. SUMMARY

[0004] The application aims to provide a terminal general processing resource allocation architecture suitable for multi-system satellite communication waveform, which breaks through the bottleneck of traditional satellite communication terminals that only adapt to special satellite communication systems. The application realizes the dynamic loading application of multi-system satellite waveform in terminal general processing resources, improves the application flexibility of satellite communication system, and saves the physical resources of satellite communication terminal.

[0005] The application aims to achieve the following technical solutions:

[0006] A terminal general processing resource allocation architecture suitable for multi-system satellite communication waveform, which comprises intermediate frequency preprocessing resource evaluation. The intermediate frequency preprocessing resource evaluation allocates the filter bandwidth of the terminal general processing resource, and the evaluation process is as follows:

[0007] Step 1, analyze the link path loss L of the current single-system waveform f :

[0008] L f = 32.4 + 20log(d) + 20log(f)

[0009] Wherein, d is the distance from satellite to terminal, f is the frequency of electromagnetic wave signal;

[0010] Step 2, analyze the link loss L of current single-body waveform:

[0011] L = L f -L a -L p -L r

[0012] L a is atmospheric loss, L p is polarization loss, L r is rain attenuation loss;

[0013] Step 3, analyze the bit energy noise power spectral density ratio Eb / N0 under the current link transmission bit information rate: tmp , get the link transmission bit information rate Rb:

[0014] Eb / N0 tmp = EIRP-L+G / T-K-10log(Rb)

[0015] Wherein, EIRP is the equivalent isotropically radiated power of the transmitting end antenna, G / T is the ratio of the receiving end antenna gain to the noise temperature, and K is the Boltzmann constant;

[0016] Step 4, select the filter corresponding to the bandwidth from the multi-filter set according to the link transmission bit information rate Rb.

[0017] Further, the intermediate frequency preprocessing resource evaluation also allocates the receiving level of the terminal general processing resource, based on the antenna port input and output level indicators, cable loss and plug-in loss margin, and the corresponding comprehensive evaluation obtains the receiving level requirements of each system satellite communication waveform. The highest receiving level requirement of all system satellite communication waveforms is taken as the lowest indicator of the terminal general processing resource.

[0018] Further, the intermediate frequency preprocessing resource evaluation also allocates the analog transceiver channel of the terminal general processing resource, and takes the maximum analog transceiver channel number in all system satellite communication waveforms as the lowest indicator of the terminal general processing resource.

[0019] Further, the allocation architecture further comprises baseband processing resource evaluation, the FPGA resource occupation involved in the acquisition, filtering, coding and decoding, modulation and demodulation, interleaving / deinterleaving and frame processing of the single system waveform is obtained, and the average proportion of the single system waveform to the processing logic resource is obtained by considering the communication rate that can be supported by the terminal; the memory resource occupation proportion in the single system waveform peak data buffer evaluation is considered; the processing logic resource demand and the memory resource demand of each system satellite communication waveform in the baseband processing are obtained by corresponding comprehensive evaluation, and the highest processing logic resource demand and the memory resource demand of all system satellite communication waveforms in the baseband processing are taken as the minimum indicators of the terminal general processing resource.

[0020] Further, the allocation architecture further comprises protocol processing resource evaluation, the processing logic resource demand and the memory resource demand of each system satellite communication waveform in the protocol processing are obtained by comprehensively evaluating the receiving link network layer, the link layer protocol stack, the transmitting link network layer, the link layer protocol stack and the software management, and considering the network and link protocol stack processing core occupation and the software management core occupation under the peak information rate; the memory resource occupation proportion in the single system waveform peak data buffer evaluation is considered; the processing logic resource demand and the memory resource demand of each system satellite communication waveform in the protocol processing are obtained by corresponding comprehensive evaluation; and the highest processing logic resource demand and the memory resource demand of all system satellite communication waveforms in the protocol processing are taken as the minimum indicators of the terminal general processing resource.

[0021] Further, the allocation architecture further comprises internal and external interface resource evaluation, the demand of the interface between the signal processing resource and the protocol processing resource, the interface between the signal processing resource and the antenna and the interface between the protocol processing resource and the application data are evaluated, and the internal and external interface requirement of each system satellite communication waveform to the terminal general processing resource is obtained by corresponding comprehensive evaluation; and the highest internal and external interface requirement of all system satellite communication waveforms is taken as the minimum indicator of the terminal general processing resource.

[0022] The beneficial effects of the present application are as follows:

[0023] The present application can support the switching operation of multiple satellite communication system waveforms through the intermediate frequency preprocessing resource evaluation, the baseband processing resource evaluation, the protocol processing resource evaluation and the internal and external interface resource evaluation. Compared with the traditional single terminal corresponding single system satellite communication waveform scheme, the number of terminals is reduced for the platform requiring multiple satellite communication system functions, the research and development and maintenance cost of the terminal product in the whole life cycle is reduced, the hardware resource configuration and maintenance support equipment are reduced, and the use and maintenance support pressure is reduced. In addition, the corresponding resources of the intermediate frequency preprocessing resource evaluation, the baseband processing resource evaluation, the protocol processing resource evaluation and the internal and external interface resource evaluation are relatively independent, which is beneficial to the rapid upgrade iteration of hardware resources, facilitates the unified scheduling of satellite resources, and is beneficial to the rapid realization of batch upgrade and capacity expansion based on general hardware processing resources. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A schematic diagram of a terminal general processing resource allocation architecture applicable to multiple system satellite communication waveforms.

[0025] Figure 2 A schematic diagram of a signal transmission path between a satellite communication antenna and a terminal general processing resource. DETAILED DESCRIPTION

[0026] The application will be further described below in conjunction with the accompanying drawings and examples.

[0027] A terminal general processing resource allocation architecture applicable to multiple system satellite communication waveforms, as shown in Figure 1 includes intermediate frequency pre-processing resource evaluation, baseband processing resource evaluation, protocol processing resource evaluation, and internal and external interface resource evaluation.

[0028] I. Intermediate frequency pre-processing resource evaluation:

[0029] Intermediate frequency pre-processing resource evaluation achieves the transfer of multiple system waveform application indicators to general processing resource technical indicators through link calculation, obtaining the allocation of terminal general processing resource reception level, filter bandwidth, and analog transceiver channel.

[0030] (1) Filter bandwidth: Link loss L is different for different frequency of each system waveform, and bit energy noise power spectral density ratio Eb / N0 tmp is also different for each system waveform. Based on the demodulation threshold Eb / N0 (bit energy noise power spectral density ratio under the condition of specified modulation and coding method and bit error rate) analysis of different bit information rate levels of single system waveform, the current EIRP, link loss L, and G / T indicators, the bit information rate Rb that the current single system waveform can achieve is obtained, and the intermediate frequency filter bandwidth corresponding to Rb is obtained. The specific evaluation process is as follows:

[0031] Step 1, analyze the link path loss L of the current single system waveform f :

[0032] L f = 32.4 + 20 log(d) + 20 log(f)

[0033] Where d is the distance from the satellite to the terminal, and f is the frequency of the electromagnetic wave signal.

[0034] Step 2, analyze the link loss L of the current single system waveform:

[0035] L = L f -L a -L p -L r

[0036] L a is the atmospheric loss, and Lp For polarization loss, L r This is due to rain attenuation and loss.

[0037] Step 3: Analyze the bit energy noise power spectral density ratio Eb / N0 at the current link bit information transmission rate. tmp The link transmission bit information rate Rb is obtained.

[0038] Eb / N0 tmp =EIRP-L+G / TK-10log(Rb)

[0039] Where EIRP is the equivalent isotropic radiated power of the transmitting antenna, G / T is the ratio of the receiving antenna gain to the noise temperature, EIRP and G / T are known antenna specifications, and K is the Boltzmann constant -228.6 dBw / K·Hz.

[0040] Step 4: Select a filter with the corresponding bandwidth from the multiple filter banks based on the link transmission bit information rate Rb. A filter bank consists of multiple filters. Since filters with similar specifications can share filters, the number of filters in the filter bank is less than or equal to the number of waveforms in the system.

[0041] (2) Received Level: For the received signal of the terminal's general processing resources, it is necessary to ensure that the demodulated signal power of the waveform is within the effective sampling signal range. The terminal's general processing resources internally guarantee the sampling input signal power through fixed gain + adjustable attenuation. For the transmitted signal of the terminal's general processing resources, the main transmitted signal index involving the waveform is the intermediate frequency (IF) signal transmitted power. Considering the volume and power consumption constraints of the terminal's general processing resources, the transmitted IF signal power must meet the processing requirements of the antenna-end transmit link, thereby ensuring the output EIRP value. To ensure the normal operation of the satellite communication signal processing link, a compliance assessment of the level allocation of the signal transmission path between the satellite communication antenna and the terminal's general processing resources is required. Based on the antenna port input and output level indicators and cable loss and insertion loss margin (including cable and connector losses between the antenna and the satellite communication terminal, and cable and connector losses within the satellite communication terminal, such as...), Figure 2 As shown in the figure, a comprehensive evaluation can be conducted to determine the reception level requirements of the terminal's general processing resources for each satellite communication waveform. The highest reception level requirement for all satellite communication waveforms is taken as the minimum indicator for the terminal's general processing resources.

[0042] (3) Analog transceiver channels: The number of analog transceiver channels varies for different systems and waveforms. The maximum number of analog transceiver channels among all systems and satellite communication waveforms is taken as the minimum indicator of the terminal's general processing resources.

[0043] Second, baseband processing resource assessment: Baseband processing resource assessment mainly involves allocating processing logic resources and memory resources to the baseband processing based on the communication bandwidth and rate supported by the terminal for each satellite communication waveform.

[0044] Single-mode waveform baseband processing mainly involves FPGA resource usage, including acquisition, filtering, encoding / decoding, modulation / demodulation, interleaving / deinterleaving, and frame processing. Simultaneously, considering the communication rate range supported by the terminal, the average proportion of FPGA resources allocated to a single-mode waveform is obtained. Memory usage is primarily in data buffering; considering the peak data buffering of a single-mode waveform, the memory resource usage is evaluated. A comprehensive evaluation yields the processing logic resource requirements and memory resource requirements for each satellite communication waveform during baseband processing. The highest processing logic resource requirements and memory resource requirements for all satellite communication waveforms during baseband processing are used as the minimum indicators for general terminal processing resources.

[0045] Third, protocol processing resource assessment: Protocol processing resource assessment mainly involves allocating CPU and memory resources for communication protocol processing based on the communication bandwidth and rate supported by the terminal for each satellite communication waveform.

[0046] Single-mode waveform protocols have high processing speeds. To avoid packet loss due to untimely processing and out-of-order delivery, a comprehensive evaluation of the receiving link network layer, link layer protocol stack, transmitting link network layer, link layer protocol stack, and software management is necessary. Under peak information rates, processor resources must meet the core usage requirements of the network and link protocol stacks, as well as the core usage requirements of software management. Memory usage is primarily related to data caching; considering peak data caching for single-mode waveforms, the memory resource usage is assessed. This comprehensive evaluation yields the processing logic resource requirements and memory resource requirements for each mode of satellite communication waveform during protocol processing. The highest processing logic resource requirements and memory resource requirements for all modes of satellite communication waveforms during protocol processing are used as the minimum indicators for general terminal processing resources.

[0047] Fourth, internal and external interface resource assessment: The assessment of internal and external interface resources mainly includes the requirements for the interface between signal processing resources and protocol processing resources, the interface between signal processing resources and antennas, and the interface between protocol processing resources and application data.

[0048] The interfaces involving terminal processing resources for single-system satellite communication waveforms mainly include the control status transmission interface with the antenna, the intermediate frequency (IF) signal interface, and the data interface between terminal processing resources and service processing resources and management resources. IF signals can be divided into digital IF and analog IF, and the transmitted signals of various interfaces can be divided into optical signals and electrical signals, and also into different data interaction protocols such as SRIO and Ethernet. A comprehensive evaluation can determine the internal and external interface requirements of each system's satellite communication waveform for the terminal's general processing resources. The highest internal and external interface requirements for all systems' satellite communication waveforms are taken as the minimum indicators for the terminal's general processing resources.

[0049] This invention decomposes the characteristic single-mode waveform operation resource requirements into specific intermediate frequency preprocessing, baseband processing, protocol processing, and interface requirements, and then uses a general satellite communication waveform terminal to process the resources to meet the switching operation of each single-mode waveform. This enables the comprehensive application of multi-mode satellite communication waveforms on a single terminal, solving the bottleneck of satellite communication network support capability under traditional satellite communication terminals while improving the adaptability and availability of satellite communication terminals in dynamic satellite resource scenarios.

[0050] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A terminal general processing resource allocation architecture applicable to multi-mode satellite communication waveforms, characterized in that... This includes an assessment of intermediate frequency (IF) preprocessing resources. The IF preprocessing resource assessment allocates the filtering bandwidth of the terminal's general processing resources. The assessment process is as follows: Step 1: Analyze the link path loss L of the current single-mode waveform. f : L f =32.4+20log(d)+20log(f) Where d is the distance from the satellite to the terminal, and f is the frequency of the electromagnetic wave signal; Step 2: Analyze the link loss L of the current single-mode waveform: L=L f -L a -L p -L r L a For atmospheric loss, L p For polarization loss, L r This is due to rain attenuation loss; Step 3: Analyze the bit energy noise power spectral density ratio Eb / N0 at the current link bit information transmission rate. tmp The link transmission bit information rate Rb is obtained: Eb / N0 tmp =EIRP-L+G / TK-10log(Rb) Where EIRP is the equivalent isotropic radiated power of the transmitting antenna, G / T is the ratio of the receiving antenna gain to the noise temperature, and K is the Boltzmann constant. Step 4: Select the filter with the corresponding bandwidth from the multiple filter banks according to the link transmission bit information rate Rb.

2. The terminal general processing resource allocation architecture applicable to multi-mode satellite communication waveforms according to claim 1, characterized in that... The intermediate frequency preprocessing resource assessment also allocates the receiving level of the terminal's general processing resources. Based on the antenna port input and output level indicators, as well as cable loss and insertion loss margin, a comprehensive assessment is conducted to determine the receiving level requirements for satellite communication waveforms of various systems. The highest receiving level requirement for all satellite communication waveforms of various systems is taken as the minimum indicator of the terminal's general processing resources.

3. The terminal general processing resource allocation architecture applicable to multi-mode satellite communication waveforms according to claim 1, characterized in that... The intermediate frequency preprocessing resource assessment also allocates analog transceiver channels for terminal general processing resources, taking the maximum number of analog transceiver channels among all satellite communication waveforms as the minimum indicator for terminal general processing resources.

4. The terminal general processing resource allocation architecture applicable to multi-mode satellite communication waveforms according to claim 1, characterized in that... It also includes baseband processing resource assessment, which evaluates the FPGA resource usage of a single-mode waveform during acquisition, filtering, encoding / decoding, modulation / demodulation, interleaving / deinterleaving, and frame processing, and takes into account the communication rate range supported by the terminal to obtain the average proportion of processing logic resources for a single-mode waveform; it also evaluates the memory resource proportion considering the peak data buffer of a single-mode waveform; and it comprehensively evaluates the processing logic resource requirements and memory resource requirements of each mode satellite communication waveform during baseband processing, and uses the highest processing logic resource requirements and memory resource requirements of all mode satellite communication waveforms during baseband processing as the minimum indicators of general processing resources for the terminal.

5. A terminal general processing resource allocation architecture applicable to multi-mode satellite communication waveforms as described in claim 1, characterized in that... It also includes protocol processing resource assessment, which comprehensively evaluates the receiving link network layer, link layer protocol stack, transmitting link network layer, link layer protocol stack, and software management to determine the processing logic resource requirements that meet the core occupancy of network and link protocol stack processing and the core occupancy of software management under peak information rate conditions. Considering the peak data caching of single-system waveforms, the proportion of memory resources is evaluated; accordingly, a comprehensive evaluation is conducted to determine the processing logic resource requirements and memory resource requirements of each system of satellite communication waveforms during protocol processing; the highest processing logic resource requirements and memory resource requirements of all system satellite communication waveforms during protocol processing are used as the minimum indicators of general terminal processing resources.

6. The terminal general processing resource allocation architecture applicable to multi-mode satellite communication waveforms according to claim 1, characterized in that... It also includes internal and external interface resource assessment, which assesses the interface requirements between signal processing resources and protocol processing resources, between signal processing resources and antennas, and between protocol processing resources and application data. Based on the comprehensive assessment, the internal and external interface requirements of satellite communication waveforms of various systems for terminal general processing resources are obtained, and the highest internal and external interface requirements of satellite communication waveforms of all systems are used as the minimum indicators of terminal general processing resources.

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