Design of Shared Signal for Maritime Communication and Navigation Based on BIPCM

In order to solve the problem of low communication efficiency of the shared signal of maritime communication and navigation based on LFM, this paper uses Polar coding as the coding scheme of the shared signal, which slightly increases the system complexity compared with the traditional interleaved algorithm, and proposes the BIPCM algorithm. The bit channels are classified according to reliability measurement parameters, and the dispersion of information bit channels is expanded through the combination of different interleaved methods to enhance the ability of signal against burst errors. Simulation results verify the effectiveness of the shared signal. Compared with random BICM, the 128-bit and 512-bit BIPCM signals in Rayleigh channel have 0.4 and 0.3dB performance gains, and compared with random interleaved signals in Rice channel, the 128-bit and 512-bit BIPCM signals have 0.2 and 0.1dB performance gains. Moreover, the shared signal envelope of BIPCM is constant, and the spectrum is not broadened compared with the traditional LFM signal.