Implementation of cross-correlation algorithm for the auto-tracking receiver

To improve the signal to noise ratio in the auto-tracking receiver, the traditional two dimensional acquisition algorithm is often used. However, its application has been limited because of the large amount of calculations. In this paper, a low-complexity cross-correlation algorithm is proposed. Firstly, the theoretical deviation is given. And then its implementation based on Field Programmable Gate Arrays (FPGA) is also presented. The System Generator development tool is used to realize the digital down conversion, the cross-correlation algorithm and the angle measurement function in FPGA. In addition, testing modules are also developed. Finally, the experimental results demonstrate the effectiveness of the proposed method.