Design And Verification Of Digital Baseband Transmitting Circuits For Bluetooth Low Energy

With the characteristics of low power consumption and low cost, Bluetooth low energy has been widely used in the field of wireless communications. At present, the requirement of Bluetooth low energy digital baseband is more and more high. Therefore, it is of great significance to design a low complexity and resource consumption for Bluetooth low energy digital baseband transmitting circuits.A scheme of Bluetooth low energy digital baseband transmitting circuit is designed in the thesis,which focus on the problem with too many iterative times of the scaling-free Coordinate Rotation Digital Computer(CORDIC)algorithm. On the basis of scaling-free algorithm, Angle Coding is used, which skips some useless angle,and ignore the effect of the scaling factor, so as to quickly calculate the rotation angle using the angle coding, to reach the goal of reducing the number of iterations, so as to reduce the consumption of resources. In addition, in order to simplify the operation process, before implementing such programs, angles of different quadrants are mapped to the first quadrant using the angle compression mechanism. After completing the design of each module, FPGA verification platform is built to validate the Bluetooth low energy digital baseband transmitting system,Verification results showing that system’s requirements of 8MHz clock, the circuit design achieve the signals rate of IMbps, and the root mean square error of GFSK modulated signal in the baseband circuits is 4.2%. Compared with the traditional method, the logic resource consumption of the improved CORDIC module is reduced by 16.7%.The baseband transmitting circuit is designed in this thesis can well meet the system requirements in terms of performance, which provides a reference for the design of Biuetooth low energy baseband transmitting circuits, and has a certain application prospect and practical value.