Analysis on Cross-Correlation Coefficient for Survivability of Chirp Spread Spectrum Systems

Kim, Kwang-Yul; Shin, Yoan

doi:10.1109/tifs.2019.2953332

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…With its ability to achieve seamless integration of sensing and communication functions, waveform sharing technology plays a pivotal role in ISAC systems. Linearly frequency modulated (LFM) signals, characterized by their superior pulse compression performance and anti-multipath attenuation capabilities, have found widespread use in various radar and spread spectrum communication applications [3,4]. Therefore, LFM-based shared waveform becomes an excellent option for ISAC system.…”

Section: Introductionmentioning

confidence: 99%

Photonic generation of frequency agile LFM signals for ISAC systems

Zhou,

Zhao,

et al. 2024

Preprint

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A compact photonic method to generate frequency agile linearly frequency modulated (LFM) signals is proposed demonstrated by experiment and simulation. A Mach-Zehnder modulator driven by an LFM waveform train and an electrical controlled optical tunable delay line driven by a coding sequence is employed. According to time-frequency linear relationship of LFM signals, the initial frequency of the generated signals can be shifted by adjusting the introduced time delay. Experiments are carried out to verify the feasibility of the proposed generator. Frequency agile LFM signals under 2FSK and 4FSK modulation with symbol rate of 4 Msps and 8 Msps are successfully obtained. 0.15 m range resolution and 4 Mbps communication data rate are achieved with a 1-1.5 GHz driving LFM signal. This scheme features compact structure and excellent tunability, which are promising to find applications in anti-jamming ISAC systems.

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Section: Introductionmentioning

confidence: 99%

Photonic generation of frequency agile LFM signals for ISAC systems

Zhou,

Zhao,

et al. 2024

Preprint

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“…Linearly chirped waveform is a form of pulse compression signal, which is widely used in radar system [1]. At the same time, linearly chirped waveform is a kind of spread spectrum signal, which has potential application in wireless communication [2]. Previously, the chirped signal was generated by using analog or digital circuits in the electrical domain [3].…”

Section: Introductionmentioning

confidence: 99%

Photonic Generation and Application of a Bandwidth Multiplied Linearly Chirped Signal With Phase Modulation Capability

Zhao

et al. 2021

IEEE Access

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Photonic generation of a bandwidth multiplied linearly chirped signal with phase modulation capability is proposed and its applications in communication and radar systems are demonstrated. In the generator, a dual-polarization quadrature phase shift keying modulator is used to simultaneously perform bandwidth multiplication and phase modulation. The generator can be functionally expanded to a transceiver for wireless communication, which can be used to perform optical generation and coherent demodulation of a phase modulated linearly chirped signal. Meanwhile, the generator can be used to increase the radar detection distance by improving the signal time bandwidth product. The signal generation and application are verified by simulation. A linearly chirped signal with an instantaneous frequency of 8-12 GHz or 16-24 GHz is obtained by using a 4-6 GHz electrical driving signal. The proposed transceiver is demonstrated to perform 156.25-bit/s wireless communication. When the emitting power is 11 dBm and the communication distance is 1 km, the bit error rate can be better than 10 -4 . While for radar detection, the peak to sidelobe ratio of the compressed pulse is increased from 1.1 dB to 9.2 dB, through which the distance improvement can be verified.

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