摘要
A novel scheme for ultra-wideband（UWB） monocycle pulse generation is proposed based on a dual-output push-pull Mach-Zehnder modulator（MZM）.The MZM is driven by a non-return-to-zero（NRZ） data sequence and biased at the nonlinear point to generate edge-triggered pulses.To combine the complementary pulses forming a monocycle UWB pulse,two schemes are used to implement incoherent summation structure. A proof-of-concept experiment of UWB-over-fiber down-link system is set up.Further,by using digital signal processing（DSP） to calculate the bit error rate（BER）,the transmission performance of two system configurations is studied.
A novel scheme for ultra-wideband（UWB） monocycle pulse generation is proposed based on a dual-output push-pull Mach-Zehnder modulator（MZM）.The MZM is driven by a non-return-to-zero（NRZ） data sequence and biased at the nonlinear point to generate edge-triggered pulses.To combine the complementary pulses forming a monocycle UWB pulse,two schemes are used to implement incoherent summation structure. A proof-of-concept experiment of UWB-over-fiber down-link system is set up.Further,by using digital signal processing（DSP） to calculate the bit error rate（BER）,the transmission performance of two system configurations is studied.
基金
supported in part by the National Natural Science Foundation of China(No.60736003)
the National"863"Project of China(Nos.2009AA01Z222 and 2007AA01Z256)
the National"973"Project of China (No.2006CB302805)
the Project iCHIP financed by the Italian Ministry of Foreign Affairs.
