Implementation method of hts satellite payload in radio frequency domain based on n-active architecture

Abstract

The implementation method of the radio frequency domain of the HTS satellite payload based on the N-active framework is specifically: (1) Determine the frequency range of the feeder beam and the frequency range of the user beam according to the available frequency resources provided by the uplink and downlink frequency bands of the HTS satellite communication link , design and calculate the maximum envelope BW of the working bandwidth of a single user beam; (2) determine that in the HTS satellite communication system, a single user beam is managed by several gateway stations; (3) carry out the forward feed branch of the HTS satellite load Design of the topology structure; (4) Design the topology structure of the forward feed branch synthesis network; (5) Design the payload scheme according to the forward feed branch synthesis network; (6) Carry out the HTS satellite load return link feed The design of electrical shunt topology; (7) Design the topology of the reverse link shunt synthesis network; (8) Design the payload scheme according to the return link shunt synthesis network. The invention realizes the load scheme based on the N-active system framework in the radio frequency field.

Description

technical field [0001] The invention belongs to the technical field of satellite payloads, and relates to a radio frequency domain implementation method of satellite payloads. Background technique [0002] The high-throughput communication satellite system is a multi-beam double-hop communication, and the general frequency plan is in the Ka frequency band. In recent years, the feeder link has gradually developed to the millimeter-wave Q / V frequency band to meet the high-speed satellite communication, broadband digital transmission and other two-way satellites. multimedia business. However, the Q / V frequency band has a large amount of rain attenuation. If a fixed system margin is used to overcome the attenuation effect, it will cause a huge waste of power resources and an increase in communication costs in clear skies. However, in the case of large attenuation, it cannot be obtained Complete compensation will deteriorate system performance and even cause communication interr...

AI Technical Summary

Problems solved by technology

However, the N-acitve system architecture adds extremely high complexity and great technical difficulty to the design of space satellite payloads, which has not yet been realized in engineering

At present, there is a trend in the world to use digital transparent forwarding (DTP) technology to realize the N-active system architecture, but DTP technology needs to realize the exchange and communication between a user and multiple gateways in the satellite payload in the digital domain. On the one hand, the payload must be from Ka or Q / V feed frequency conversion to the digital domain of the baseband frequency, this conversion operation requires a lot of equipment

On the other hand, the channelized switching equipment that realizes digital transparent forwarding needs to process all frequencies of inbound and outbound power feeds. The total processing bandwidth for ultra-large-capacity satellite systems is between 50 and 100 GHz, and the total processing bandwidth for very high-throughput communication systems is The bandwidth is above 200GHz. The bandwidth processing capability of this scale poses a severe test to the performance requirements of components, equipment weight, power consumption, and heat consumption. The manufacturing cost is also much higher than the general HTS communication load.

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