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Updated: May 28, 2026

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
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Cooperative Design of Ranging and Communication for In-Band Full-Duplex Inter-Satellite Links.

Hao Feng1,2, Zhuo Yang1,2, Hong Ma1,2

  • 1Space Engineering University, Beijing 101416, China.

Sensors (Basel, Switzerland)
|May 27, 2026
PubMed
Summary

This study enhances BeiDou Navigation Satellite System-3 (BDS-3) inter-satellite links (ISLs) by using an in-band full-duplex (IBFD) architecture. This design boosts communication efficiency fivefold without impacting ranging accuracy, improving satellite navigation capabilities.

Keywords:
BDS-3communication efficiencyin-band full-duplexinter-satellite linksignal acquisition

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Area of Science:

  • Satellite Communication Systems
  • Navigation Systems Engineering
  • Signal Processing

Background:

  • Traditional time-division half-duplex (TDHD) systems for BDS-3 inter-satellite links (ISLs) face limitations in communication capacity.
  • Existing systems dedicate significant time slots for signal acquisition, reducing effective communication duration.

Purpose of the Study:

  • To propose a cooperative design for ranging and communication in BDS-3 ISLs using an in-band full-duplex (IBFD) architecture.
  • To enhance communication efficiency and capacity without compromising ranging accuracy.
  • To provide a feasible technical solution for improving BDS-3 ISL performance.

Main Methods:

  • Utilizing BeiDou Navigation Satellite System (BDS) broadcast ephemeris for signal acquisition assistance.
  • Implementing a serial acquisition strategy with low computational complexity for a 100% acquisition success rate within milliseconds.
  • Redesigning the ISL time-slot structure to use the preamble for ranging and the measurement period for dual-channel Quadrature Phase-Shift Keying (QPSK) data transmission.

Main Results:

  • Achieved a 100% signal acquisition success rate within milliseconds, freeing up the original 250 ms preamble.
  • Extended effective communication duration from 1 s to 2.5 s within the existing 3 s time slot.
  • Expanded communication from single-channel to dual-channel, theoretically achieving a 5-fold improvement in communication efficiency.
  • Maintained essentially unchanged ranging accuracy compared to traditional TDHD systems.

Conclusions:

  • The proposed IBFD architecture enables cooperative optimization of ranging and communication in BDS-3 ISLs.
  • This approach significantly enhances communication capacity and efficiency without altering the established time-slot duration.
  • The method offers a practical solution for upgrading the performance of BDS-3 inter-satellite links.