Wire Communication System Based on DSP in Feeder Automation

摘要

The requirements of feeder automation are that the communication system had the characteristic of lower cost, stronger anti-interference ability, higher reliability and much more real time ability. So wire (twister-pair) relay communication manner is chosen in the feeder automation system in the design. and the communication distance can reach to 10km. In the system, OFDM(orthogonal frequency division multiplexing)technology is applied to transfer data. The OFDM signal is produced and demodulated by way of IFFT (Inverse Fast Fourier Transformer) and FFT(Fast Fourier Transformer). A general DSP (Digital signal process) chip TMS320C54 act as the key of digital signal process to perform almost all the function including arithmetic calculation, modulating and demodulating the data. The OFDM signal Modem, designed basing on the DSP chip, had met the need of the communication system.