CAJ | 학술논문

OFDM基带调制的目的是将高速的串行数据流转换成并行的低速数据流,再调制到频谱是正交重叠的子载波上进行传输,以便于提高频谱利用率。 OFDM可以采用IFFT/FFT实现调制解调,在本设计中采用FPGA技术可以比较容易地实现OFDM通信系统的的调制器部分。整个系统包括RS编码、交织、QAM星座映射,IFFT和插入CP等模块,经过仿真验证：提高了系统的处理速度,具有较高的应用价值。
OFDM기대조제적목적시장고속적천행수거류전환성병행적저속수거류,재조제도빈보시정교중첩적자재파상진행전수,이편우제고빈보이용솔。 OFDM가이채용IFFT/FFT실현조제해조,재본설계중채용FPGA기술가이비교용역지실현OFDM통신계통적적조제기부분。정개계통포괄RS편마、교직、QAM성좌영사,IFFT화삽입CP등모괴,경과방진험증：제고료계통적처리속도,구유교고적응용개치。
The target of OFDM is high-speed serial data stream into low-speed parallel data streams,and modulation spectrum is to transmit the orthogonal subcarriers overlap,so the spectrum utilization rate is advanced. And OFDM can be used to achieve IFFT/FFT modulation and demodulation,realized easily by FPGA technology. The design is based on FPGA technology to realize the modulator part of OFDM communication system, which includes RS coding,interleaving,constellation mapping,QAM,IFFT and inserted into the CP module. The speed of system can be improved and it has higher application value by the simulation.