In this paper, we report the first all-optical solution for multi-false-target range-velocity compound deception jamming based on frequency-comb-enabled photonic RF memory (PRFM). The operation frequency of current digital RF memory (DRFM) in electronic countermeasures is severely limited by low-speed digital devices. Since optical processing has a larger bandwidth and higher speed, it is valuable to develop advanced functions of PRFM. Our method skillfully applies a carrier-signal separation strategy to enhance the performance and extend the functions of PRFM. By bandwidth-optimized storage of the RF signal, the ASE noise accumulation and high-power optical self-oscillations can be effectively suppressed, contributing to a significant improvement of the signal SNR. On the other hand, by comb modulation of the optical carrier, the beaten signal contains multiple coherent false targets with different range-velocity deception information. In our experiment, the maximum storage time has exceeded$840~\mu $s with less than 10 dB SNR degradation, and the storage signal frequency has reached 16 GHz. Furthermore, more than 10 false targets have been obtained in the 10 dB bandwidth simultaneously, with the SNR consistently close to 40 dB. The outstanding storage and jamming performance allows our scheme to promote the deployment and upgrade of PRFM in electronic countermeasures.

In this paper, we propose a novel physical layer security optical transmission scheme utilizing randomized quantization noise. The proposed approach encrypts low-order plaintext signals into ultra-high-order ciphertext using principles similar to quantum noise stream cipher (QNSC). While, the ultra-dense quadrature amplitude modulation (QAM) ciphertext waveforms are masked by intrinsic quantization noise. The combination of digital delta-sigma quantization and analog chaotic random scrambling not only produces randomized quantization noise, but also naturally supports one-time processing of masking ciphertext and generating keystream. Whereby, the in-band quantization noise (IBN) conceals nearby ciphertext levels bolstering security, and the out-of-band quantization noise (OOBN) is digitized to generate keystream using the Toeplitz hashing extractor. Experimental results show that 256-QAM plaintext signals were securely transmitted over standard single-mode fiber: 163-Gbps signals over 400 km, and 79.7-Gbps signals over 1800 km. To evaluate system performance, theoretical models for signal-to-noise ratio (SNR), bit error rate (BER), and number of masked signals (NMS) are derived as functions of the oversampling ratio (OSR). Our findings reveal a trade-off between transmission performance and security performance. Our results confirm that this scrambling effectively eliminates the correlation between the masking noise components. Toeplitz hashing extractor can effectively reduce the complexity of keystream generation and obtain a source-independent random keystream.