000181480 001__ 181480
000181480 005__ 20190316235459.0
000181480 037__ $$aCONF
000181480 245__ $$aImproving the Performance of the FFT-based Parallel Code-phase Search Acquisition of GNSS Signals by Decomposition of the Circular Correlation
000181480 269__ $$a2012
000181480 260__ $$c2012
000181480 336__ $$aConference Papers
000181480 520__ $$aThis paper proposes alternative architectures to perform a circular correlation using the Fast Fourier Transform (FFT) by decomposing the initial circular correlation into several smaller circular correlations. The approach used is similar to the Fast Finite Impulse Response (FIR) Algorithms (FFAs). These architectures improve the performance in terms of reduced processing time or resource usage, and consequently lower the energy consumption. The results can be applied to any system that performs circular convolution or correlation. In this paper, the application is the acquisition of Global Navigation Satellite System (GNSS) signals with the FFT-based Parallel Code-phase Search (PCS), and more precisely on the GPS L1 C/A signal, when the target considered is a Field Programmable Gate Array (FPGA). In this context, it is for example shown that it is possible with one of the proposed architectures to reduce the logic usage by 11 %, the memory usage by 41 %, and the Digital Signal Processing (DSP) block usage by 32 %, while keeping the same processing time. With another architecture, it is shown that the processing time can be halved by increasing the logic usage by only 35 %, while reducing the memory usage and keeping the same DSP usage. Note that the proposed approach is not based on an approximation of the traditional method, but a modified implementation providing the same result. Thus, there is no loss of sensitivity.
000181480 6531_ $$aAcquisition
000181480 6531_ $$aFast FIR Algorithm
000181480 6531_ $$aFFT
000181480 6531_ $$aFPGA
000181480 6531_ $$aGNSS
000181480 6531_ $$aParallel Code-phase Search
000181480 700__ $$0243685$$g191998$$aLeclère, Jérôme
000181480 700__ $$0243672$$g190010$$aBotteron, Cyril
000181480 700__ $$aFarine, Pierre-André$$0243688$$g152066
000181480 7112_ $$dSeptember 17-21, 2012$$cNashville, Tennessee, USA$$a25th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2012)
000181480 773__ $$tProceedings of the 25th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2012)
000181480 8564_ $$uhttp://www.ion.org/publications/abstract.cfm?articleID=10351$$zURL
000181480 8564_ $$uhttps://infoscience.epfl.ch/record/181480/files/ION%20GNSS%202012%20-%20D3%20-%20Lecl%C3%A8re.pdf$$zPostprint$$s912646$$yPostprint
000181480 909C0 $$xU11964$$0252263$$pESPLAB
000181480 909CO $$qGLOBAL_SET$$pconf$$ooai:infoscience.tind.io:181480$$pSTI
000181480 917Z8 $$x191998
000181480 917Z8 $$x191998
000181480 917Z8 $$x191998
000181480 917Z8 $$x191998
000181480 917Z8 $$x191998
000181480 937__ $$aEPFL-CONF-181480
000181480 973__ $$rNON-REVIEWED$$sPUBLISHED$$aEPFL
000181480 980__ $$aCONF