CP-based OFDM radar–communications signal using interval linear phase compression modulation

Abstract

In this study, a signal design algorithm for radar–communications system is investigated. An arbitrary pulse length orthogonal frequency-division multiplexing with sufficient cyclic prefix (CP-based OFDM) signal is designed as the radar–communications signal, the communication symbols are embedded by proposing an interval linear phase compression (ILPC) modulation. Firstly, the authors construct the model of CP-based OFDM signal, and analyse the impact of the communication symbols embedding. Then, to decrease the impact caused by the communication symbols embedding, the ILPC modulation is proposed. To guarantee the performances of the CP-based OFDM radar–communications signal, a time/frequency domain iterative filtering and clipping method is used. This algorithm can be used to design a CP-based OFDM signal that has a balanced performance in communications and radar. Finally, numerical results are provided to verify the validity of the proposed algorithm.

Keywords

• iterative methods
• frequency-domain analysis
• filtering theory
• ofdm modulation
• radar signal processing
• time-domain analysis
• interval linear phase compression modulation
• signal design algorithm
• radar–communications system
• sufficient cyclic prefix signal
• communication symbols
• cp-based ofdm signal
• cp-based ofdm radar–communications signal
• arbitrary pulse length orthogonal frequency-division multiplexing
• ilpc modulation
• time-frequency domain iterative filtering
• clipping method