FPGA implementation of digital modulation recognition

الملخص EN

This paper introduces a practical implementation of automatic modulation recognition (AMR) algorithm using Field Programmable Gate Array (FPGA). FPGA is an attractive choice for the implementation due to its advantages in performance, power consumption and configurability.

Most of AMR researches are based on complex techniques that are not suitable for real time implementation, which requires an efficient use of the FPGA resources to reduce the number of gates.

A new algorithm for AMR is introduced to detect the type of digital modulation presented in the incoming signal.

This algorithm is carefully designed to meet the requirements of FPGA to obtain a single module that can be fitted in one chip.

The modulation types considered are amplitude shift keying ASK, frequency shift keying FSK, and phase shift keying PSK, with a modulation degree up to 16-ary.

The implementation is carried out using the SPARTAN-3 development kit from Xilinx [1].

The system can tolerate signal to noise ratio (S/N) down to 10 dB without errors.