V-BLAST transmission scheme based on mobile robot in WSN

Aiming at the requirements of high-speed data transmission and energy consumption in the case of emergency relief and real-time detection, a new mobile robot & V-BLAST based cooperative MIMO transmission scheme and a new efficient ML detection algorithm are proposed in this paper. Mobility of robot can reduce the communication distance between the sensor nodes, MIMO-based WSN can use its diversity gain to overcome fading effects and can also use its multiplexing gain to increase the data transmission rate. Combined with traditional decoding OSIC algorithm, the vectors need to be detected in Low-complexity approximate maximum likelihood algorithm are reduced. So, the computational complexity of the proposed algorithm is decreased greatly. Simulation results show that the proposed scheme effectively reduces network energy consumption, and the low-complexity maximum likelihood detection algorithm further improve energy-efficiency.