Design and Implementation of a novel QPSK demodulator for FPGA based system design

Quadrature Phase Shift Keying (QPSK) is used in various applications such as GSM, LTE, WLAN, mobile WiMAX, CDMA, Cable TV and satellite communication. Design and implementation of QPSK modulator and demodulator for FPGA based systems is proposed in this work. A novel comparator based method is employed for QPSK demodulation and the hardware implementation of the modules on a Zynq 7000 FPGA based ZED board is carried out using the concepts of model based design.