Performance Analysis of Joint Range and Velocity Estimator for E-Band ISAC

For better integrated sensing and communication (ISAC) performance, high-resolution range and velocity estimation is a crucial metric. On the premise of the E-Band platform, the feasibility of root multi-signal classification (RMUSIC) algorithm in millimeter wave frequency band is verified in this paper via the orthogonal frequency division multiplexing (OFDM) waveform. Compared with other super-resolution algorithms, the RMUSIC algorithm has not only higher estimation accuracy but lower complexity. Simulation experiments and laboratory measurements at 72 GHz show that the algorithm is superior in performance while ensuring the communication function. While maintaining a capacity of about 10 GHz, the sensing ranging measurement accuracy can reach the centimeter level, and the velocity measurement accuracy can reach the several centimeters per second level.