广东电力
廣東電力
엄동전력
GUANGDONG ELECTRIC POWER
2014年
1期
105-109
,共5页
电力光纤通信%正交频分复用%频域滑动平均%接收灵敏度
電力光纖通信%正交頻分複用%頻域滑動平均%接收靈敏度
전력광섬통신%정교빈분복용%빈역활동평균%접수령민도
electric power optical fiber communication%orthogonal frequency division multiplexing%frequency domain mov-ing average%receive sensitivity
提出将正交频分多路复用(orthogonal frequency division multiplexing,OFDM)技术应用到电力光纤通信系统中,以提高系统的可靠性和稳定性。针对光纤信道特性在频域上变化缓慢且相邻的信道特性高度相关的特点,在基于训练序列的信道估计中采用频域滑动平均方法来提高信道估计的准确性。仿真结果表明,相对于原始的信道估计方法,采用频域滑动平均信道估计方法后OFDM信号接收灵敏度提高1.5 dB,且相对背靠背时基本不会引入功率代价。
提齣將正交頻分多路複用(orthogonal frequency division multiplexing,OFDM)技術應用到電力光纖通信繫統中,以提高繫統的可靠性和穩定性。針對光纖信道特性在頻域上變化緩慢且相鄰的信道特性高度相關的特點,在基于訓練序列的信道估計中採用頻域滑動平均方法來提高信道估計的準確性。倣真結果錶明,相對于原始的信道估計方法,採用頻域滑動平均信道估計方法後OFDM信號接收靈敏度提高1.5 dB,且相對揹靠揹時基本不會引入功率代價。
제출장정교빈분다로복용(orthogonal frequency division multiplexing,OFDM)기술응용도전력광섬통신계통중,이제고계통적가고성화은정성。침대광섬신도특성재빈역상변화완만차상린적신도특성고도상관적특점,재기우훈련서렬적신도고계중채용빈역활동평균방법래제고신도고계적준학성。방진결과표명,상대우원시적신도고계방법,채용빈역활동평균신도고계방법후OFDM신호접수령민도제고1.5 dB,차상대배고배시기본불회인입공솔대개。
This paper proposes to apply orthogonal frequency division multiplexing technology in electric power optical fiber communication system in order to improve reliability and stability of the system.Aiming at characteristics of slow change in frequency domain of properties of optical channel and high correlation of adjacent channel,it uses frequency domain moving average method in channel estimation based on training sequence to improve veracity of channel estimation.Simulation result indicates that being relative to original channel estimation method,it is able to improve 1 .5 dB OFDM signal receive sensi-tivity by using frequency domain moving average method and will not introduce power penalty relative to back-to-back.
