DocumentCode :
1643832
Title :
A Novel CIC Decimation Filter for GNSS Receiver Based on Software Defined Radio
Author :
He, Zaimin ; Hu, Yonghui ; Wang, Kang ; Wu, Jianfeng ; Hou, Juan ; Ma, Langming
Author_Institution :
Nat. Time Service Center, CAS, Xi´´an, China
fYear :
2011
Firstpage :
1
Lastpage :
4
Abstract :
This paper presents a new modified cascaded integrator comb (CIC) decimation filter with sharpened magnitude response which is base on amplitude change function, although pass-band droop and stop-band attenuation are reduced greatly, there exists little pass-band droop over signal bandwidth. For the sake of compensating pass-band droop, a compensation filter based on least square criterion is advanced, the coefficients of the compensation filter are obtained by solving two simple linear equation. The proposed filter is the cascade of the sharpened modified CIC filter and compensation filter, which plays an important role in digital down conversion circuit of the Global Navigation Satellite System (GNSS) receiver based on software defined radio (SDR). With the help of the proposed filter, acquisition and tracking circuit can work at lower frequency and would be easy to implement.
Keywords :
band-pass filters; comb filters; digital filters; least squares approximations; radio receivers; satellite navigation; software radio; CIC decimation filter; GNSS receiver; amplitude change function; compensation filter; digital down conversion circuit; global navigation satellite system; least square criterion; modified cascaded integrator comb decimation filter; pass-band droop attenuation; sharpened magnitude response; sharpened modified CIC filter; signal bandwidth; software defined radio; stop-band attenuation; tracking circuit; Attenuation; Bandwidth; Finite impulse response filter; Global Navigation Satellite Systems; Receivers; Transfer functions;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
ISSN :
2161-9646
Print_ISBN :
978-1-4244-6250-6
Type :
conf
DOI :
10.1109/wicom.2011.6040115
Filename :
6040115
Link To Document :
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