Hang Gui
ABSTRACT
In indoor sub-THz communication systems, due to interference, there is often an angle deviation between the transmitted beam and received beam, resulting in a sharp decline in the quality of receiving signal. In order to better cater to the needs of data transmission, this paper first designs beam precoders at the transmitter based on the concepts of successive interference cancellation (SIC) and equivalent channel. Next, considering the advantages of extended Kalman filter (EKF) algorithm in complexity and adaptability, which is suitable for mobile environments. In this article, we further use EKF for tracking and predicting the real and imaginary part of channel gain, the departure angle of beam separately to achieve the design of beam. Subsequently, the influence of factors such as the size of transmitter arrays and variance of angle changes on the proposed algorithm were studied. The simulation results indicate that proposed algorithm can perform beam tracking well and is suitable for practical mobile communication systems, thereby improving the signal quality and stability of mobile communication systems significantly.
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