mSAC: Enhancing Localization with mmWave Sensing and Orthogonal Signals

mmWave technologies have been adopted into 5G and 6G systems. Current research primarily focuses on enhancing the quality of service and data throughput in mm Wave communications, as well as improving the accuracy of sensing from their respective functional perspectives. Consequently, this emphasis often overlooks the potential benefits of integrating communication and sensing, enhancing performance across both functionalities. This paper introduces mSAC, a novel mmWave-based system that combines sensing with communication via Orthogonal Frequency-Division Multiplexing (OFDM) signals. This approach differs from traditional mmWave sensing methods that rely on Frequency-Modulated Continuous Wave (FMCW) signals, and it substantially enhances both the accuracy and range of sensing. The mSAC system features a Joint Radar-Communication (JRC) transceiver and a communication receiver, incorporating a theoretical model that fuses sensing information from synchronous and asynchronous ends. This model is crucial for smart home applications such as controlling devices, monitoring environmental conditions, and enhancing security. Comprehensive evaluations demonstrate that mSAC achieves a 65.93% improvement in sensing accuracy and a 43.19% increase in sensing range compared to conventional methods, thereby setting a new benchmark for integrated sensing and communication systems in mmWave applications.