Title :
A study of different matched filters in digital down converter
Author :
Ruan, Chengfeng ; Hua, Jingyu ; Zheng, Zhilong ; Wu, Yuan ; Meng, Limin
Author_Institution :
Zhejiang Provincial Key Lab. of Opt. Commun. Tech., Zhejiang Univ. of Technol., Hangzhou, China
Abstract :
The square root (SR) Nyquist filter is always used as matched filter in digital systems to minimize the intersymbol interference (ISI), where the square root raised cosine filter (SRRC) is a popular choice. However, more filter choices substantially provide the engineer more flexibility in applications. Hence, this paper employs the SRRC, SR-Nyquist filter and low pass filter (LPF) as the matched filter in digital down converter (DDC), and evaluates their performance in terms of the noise and interference cancellation. Moreover, the fix-point bit error rate (BER) simulation is carried out to make the study approaching the real-world scenarios.
Keywords :
convertors; digital filters; error statistics; interference suppression; intersymbol interference; low-pass filters; matched filters; DDC; ISI; LPF; SR Nyquist filter; SRRC; digital down converter; fix-point BER simulation; fix-point bit error rate simulation; intersymbol interference cancellation; low pass filter; matched filter; square root Nyquist filter; square root raised cosine filter; Attenuation; Band pass filters; Cutoff frequency; Finite impulse response filter; Matched filters; Passband; Strontium; Bit Error Rate; Digital Down Converter; FIR Filter; Square Root Nyquist filter; Square Root Raised Cosine Filter;
Conference_Titel :
Systems and Informatics (ICSAI), 2012 International Conference on
Conference_Location :
Yantai
Print_ISBN :
978-1-4673-0198-5
DOI :
10.1109/ICSAI.2012.6223457
