Truncated M-sequence and BOC Modulation based Ranging Signal Design for TWSTFT

TWSTFT is a representative time comparison technique mostly using a bent-pipe transponder of a GEO satellite with Ku-band frequency. Conventionally, DS-BPSK-based signal structures have been used for global TWSTFT links among NMIs. The BPSK-based signal structure has the advantage of having a simple...

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Main Authors: Lee, Juhyun, Oh, Ju-Ik, Choi, Gyeong Won, Kyu Lee, Young, Lee, Jong Koo, Yang, Sung-Hoon, Heo, Youn-Jeong, Yu, Dai-Hyuk, Heo, Myoung-Sun, Rhee, Joon Hyo
Format: Conference Proceeding
Language:English
Subjects:
Auto-Correlation Function
Binary Offset Carrier
Codes
Cross-Correlation Power
Distance measurement
Interference
M-sequence
Modems
Prevention and mitigation
Satellites
Time-frequency analysis
Two-Way Satellite Time and Frequency Transfer
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Summary:TWSTFT is a representative time comparison technique mostly using a bent-pipe transponder of a GEO satellite with Ku-band frequency. Conventionally, DS-BPSK-based signal structures have been used for global TWSTFT links among NMIs. The BPSK-based signal structure has the advantage of having a simple transceiver structure but is inappropriate for long coherent integration time in correlation processing. Also, BPSK-based ACF have relatively wide main lobe width and low sharpness waveform. Those ACF properties cause signal-tracking performance degradation. Conventional TWSTFT code sequence sets have relatively high cross-correlation power levels. Properties of those code sequence sets are inappropriate for service to multi-user simultaneously. In this paper, a BOC and Truncated M-sequence based new TWSTFT signal structure was proposed for improving those conventional signals. To evaluate the new TWSTFT signal structure and its code sequence sets, PSD, processing gain, ACFs, and cross-correlation power levels were compared with those of conventional SATRE, SRS modem, and GPS L1C/A, L1Cp signals.
ISSN:2160-0171
DOI:10.1109/CPEM61406.2024.10646003