基于空时编码的通感一体化波束设计OA

Integrated sensing and communication(ISAC)technology enables the coordination of multi-user communication and multi-target sensing by sharing spectrum and hardware resources.However,under statistical channel state information,how to achieve an effective tradeoff between communication reliability and sensing performance remains an urgent problem to be addressed.Compared with single-stream transmission schemes,space-time coding(STC)can provide additional degrees of freedom without introducing independent sensing signals,thereby offering a new design space for balancing ISAC performance.In view of this,this paper proposes an STC-based joint beam design method,formulates an optimization objective that jointly considers beampattern error and communication outage probability,and develops a projected gradient ascent algorithm.Simulation results show that the proposed scheme can significantly improve multi-user communication reliability while maintaining a comparable beampattern error,thereby achieving a better tradeoff between sensing and communication performance.