With the continued development of smart ocean, reliable acquisition, high-speed transmission and efficient processing of ocean information are becoming increasingly important in ocean research. Therefore, we consider a MIMO integrated detection and communication system for smart ocean, which shares the same spectrum resources on the same platform to simultaneously realize underwater target detection and communication. Firstly, we investigate two integrated waveform composition methods: communication signals, the superposition of communication and probing signals. We minimize the MIMO probe transmit beampattern matching error and cross-correlation of transmit beampattern under the constraints of the total power and communication user"s signal to interference plus noise ratio requirements. Then, for the two established beamforming design problems, they are transformed into quadratic semidefinite programming problems and solved applying semidefinite relaxation algorithm to obtain the beamforming matrix of integrated detection and communication. Finally, simulation results verify the feasibility of the beamforming design for MIMO integrated detection and communication.
[5] ZHOU Y H, CAO X L, TONG F. Acoustic MIMO Communications in a Very Shallow Water Channel[J]. 船舶与海洋工程学报:英文版,2015,14(4):434-439.
[6] NIU Q X, ZHANG Q F, SHI W T, Integrated Waveform Design Scheme Based on Underwater Detection and Communication[C]// 2022 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC): Xi''an, China, IEEE, 2022.
[7] LU J, ZHANG Q F, ZHANG L L, et al. Detection Performance of Active Sonar Based on Underwater Acoustic Communication Signals[C] //2018 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC): Qingdao, China, IEEE, 2018.
[8] LIU X H, GAO K, TANG J S, et al. High-resolution 2D Imaging Using MIMO Sonar with Fourier Integral Method (FIM)[C] //OCEANS 2019 – Marseille: Marseille, France, IEEE, 2019.
[9] A. Pottier, P. -J. Bouvet and P. Forjonel, Performance evaluation of Multi-User MIMO Underwater Acoustic Communications[C] //2021 Fifth Underwater Communications and Networking Conference (UComms): Lerici, Italy, IEEE, 2021.
[10] LIU F, MASOUROS C, LI A, et al. MU-MIMO Communications with MIMO Radar: From Co-Existence to Joint Transmission[J]. IEEE Transactions on Wireless Communications, 2018, 17(4): 2755-2770.
[11] LIU X, HUANG T Y, SHLEZINGER N, et al. Joint Transmit Beamforming for Multiuser MIMO Communications and MIMO Radar[J]. IEEE Transactions on Signal Processing, 2020, 68: 3929-3944.
[12] ZHANG H B,ZHANG H L,DI B, et al. Holographic Integrated Sensing and Communication.[J]. IEEE Journal on Selected Areas in Communications, 2022,40(7):2114-2130.
[14] S. Kim, Angle-Domain Frequency-Selective Sparse Channel Estimation for Underwater MIMO-OFDM Systems[J]. IEEE Communications Letters, 2012,16(5): 685-687.
[15] P.-J. Bouvet and Y. Auffret, On the Achievable Rate of Multiple-Input–Multiple-Output Underwater Acoustic Communications[J]. IEEE Journal of Oceanic Engineering, 2020,45(3):1126-1137.
[16] STOICA P, LI J, XIE Y. On Probing Signal Design For MIMO Radar[J]. IEEE Transactions on Signal Processing, 2007,55(8):4151-4161.