摘要
This paper presents a spectrally efficient, flipping-based integrated waveform for joint radar and communication systems, aiming to address the issue of spectral dispersion. Three strategies are proposed to mitigate the degradation in bit error rate (BER) caused by intentional bit flipping. The first strategy involves designing an interleaver, where low-degree variable nodes are interleaved to mitigate the adverse impact of flipped bits on BER performance. The second strategy introduces a codeword-aware selective flipping (SLF) technique, which minimizes the number of intentionally flipped bits without requiring side information, thereby improving BER performance without increasing computational complexity at the receiver. The third strategy proposes an iterative receiver architecture that recognizes flipping that mitigates the effects of flipped bits during the iterative detection and decoding process. By employing these techniques, the BER performance is significantly improved. Furthermore, the proposed flipping-based integrated waveform demonstrates superior spectral efficiency, achieving bandwidth savings of 17.623% compared to the direct integrated waveform and 14.468% compared to the three-segment integrated waveform.