Distance measurement-communication integrated inter-satellite link wireless signal structure

Abstract

The invention discloses a distance measurement-communication integrated inter-satellite link wireless signal structure, wherein the signal structure is divided into three time frames of leading, signal and guard band in a measurement communication time slot; the leading time frame is a BPSK (Binary Phase Shift Keying) modulation mode and only a ranging channel exits in the leading time frame; the signal time frame is a UQPSK modulation mode and the ranging channel and a communication channel are included in the signal time frame, the ranging channel and the communication channel are used for carrying out short code spectrum spreading with orthogonal spreading codes, and the channel power of the ranging channel and that of the communication channel are proportioned according to link budget; the guard band time frame is not smaller than the maximum distance transmission time delay between all satellite nodes. The distance measurement-communication integrated inter-satellite link wireless signal structure is capable of completing precision ranging and communication by establishing a two-way link at the satellite receiving and transmitting ends, and the ranging channel can be used simultaneously as a synchronization and control channel of the communication channel.

Description

technical field [0001] The invention mainly relates to the technical field of wireless communication and measurement, in particular to an inter-satellite link wireless signal structure suitable for the integration of satellite inter-satellite link communication and precision measurement ranging communication. Background technique [0002] After decades of development, space vehicle technology has been widely used in meteorology, ocean, resources, communication, navigation and positioning, and space exploration, etc., which are closely related to human society. The benefits it brings to human society are also obvious to all. However, most of the aircraft engaged in the above research are one or more serialized independent satellites. Today, as scientific research becomes more and more complex and demanding, these satellites are designed to become larger and more complex. Complexity is accompanied by a substantial increase in costs, longer development cycles, and increased ris...

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Problems solved by technology

[0004] The traditional wireless signal structure design based on the spread spectrum system is designed to meet the requirements of a single measurement or communication, because ranging and communication have different requirements on the structure of the signal, and ranging requires a long enough observation time, so it is hoped that the modulation The information rate is low, and communication requires large-capacity data transmission in a short period of time, so it is desirable to have a high communication rate, so it is difficult to unify within a single signal modulation structure

Secondly, most traditional satellite communication systems based on the spread spectrum system work at a single rate, and cannot quickly realize the seamless adjustment of the information rate based on its own signal structure to adapt to channel changes or anti-interference requirements. The generally developed satellite spread spectrum communication receivers, transmitters When the computer adjusts the information rate, the adjustment of the system software and hardware is large

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