A Novel Low-PAPR Integrated Navigation-Communication Waveform Design for LEO Satellite Systems

IF 4.8 1区 计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Zhaoxian Yang;Miaoran Peng;Yu Zhang;Xinkun Zheng;Jiaxi Zhou;Tao Jiang
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引用次数: 0

Abstract

Current orthogonal frequency-division multiplexing (OFDM)-based integrated navigation-communication (INC) designs suffer from critical limitations, particularly high peak-to-average power ratio (PAPR), which ultimately compromises the performance of both communication throughput and positioning accuracy. This paper proposes an acquisition-assisted low PAPR INC signal design scheme. Specifically, the transmitter utilizes the selectivity of the pseudorandom sequence designed for the navigation function in the frame header to indicate the index of the phase sequence that minimizes the PAPR of the OFDM signal, thereby avoiding the transmission of side information (SI) and achieving a reduction in PAPR. The receiver leverages the correlation properties of the designed synchronization sequence to jointly recover SI and estimate Doppler shift and time delay during the acquisition phase. The computational complexity of the proposed scheme is analyzed for both signal generation and SI recovery processes. The simulation results demonstrate that the proposed INC scheme achieves significant PAPR reduction without causing a degradation in the bit error rate (BER), maintains robust detection probability in low signal-to-noise ratio (SNR) environments, and attains high acquisition accuracy.
低轨道卫星低papr组合导航通信波形设计
当前基于正交频分复用(OFDM)的集成导航通信(INC)设计存在严重的局限性,特别是高峰值平均功率比(PAPR),最终会影响通信吞吐量和定位精度的性能。提出了一种采集辅助的低PAPR INC信号设计方案。具体来说,发射机利用帧报头中为导航功能设计的伪随机序列的选择性来表示使OFDM信号PAPR最小的相序列索引,从而避免了侧信息(SI)的传输,实现了PAPR的降低。接收机利用设计的同步序列的相关特性,在采集阶段联合恢复SI并估计多普勒频移和时间延迟。分析了该方案在信号产生和SI恢复过程中的计算复杂度。仿真结果表明,该方案在不降低误码率的情况下显著降低了PAPR,在低信噪比(SNR)环境下保持了鲁棒的检测概率,获得了较高的采集精度。
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来源期刊
IEEE Transactions on Broadcasting
IEEE Transactions on Broadcasting 工程技术-电信学
CiteScore
9.40
自引率
31.10%
发文量
79
审稿时长
6-12 weeks
期刊介绍: The Society’s Field of Interest is “Devices, equipment, techniques and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.” In addition to this formal FOI statement, which is used to provide guidance to the Publications Committee in the selection of content, the AdCom has further resolved that “broadcast systems includes all aspects of transmission, propagation, and reception.”
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