Channel Estimation for LTE Systems with Enhanced Security

With the continuous progress of wireless communication technology and the application of Long Term Evolution (LTE) technology in recent years, channel estimation technology has also been widely concerned and studied. Channel estimation plays an important role in reducing the bit error rate and improving the security of wireless communication system. In this paper, we discuss the channel estimation method of two-dimensional DCT to obtain complete channel information, then simulate and analyze the channel estimation method. The simulation results show that the two-dimensional DCT channel estimation method can effectively solve the error flat bottom problem in the large delay channel based on DCT transformation, and has more accurate estimation performance, so it can effectively improve the communication and transmission security of LTE system.