DOI: 10.1002/navi.147 The above article was first published online on 14 September 2016. This article was published with the following errors: A different means is then needed to sharpen the correlation peak instead [33]. The reference citation was incorrect and should have read: A different means is then needed to sharpen the correlation peak instead [34]. of the correlation function at a variable IF fi=n/Tc, denoted by VIC(nfc, fi) or simply VIC(n, 1), is approximately given by. The equation was incorrect and should have read: of the correlation function at a variable IF fi=n/Tc, denoted by VIC(nfc, fc) or simply VIC(n, 1), is approximately given by. shows the correlation peak, which is also similar to Figure 10(b) with triangular with 10 samples per side. The Figure citation was incorrect and should have read: shows the correlation peak, which is also similar to Figure 9(b) with triangular with 10 samples per side. the correlation peaks for fIF = 1, 2, and 4 MHz are successively sharpened by a factor of four. The text was incorrect and should have read: the correlation peaks for fIF = 1, 2, and 4 MHz are successively sharpened by a factor up to four. The above fact provides us with the base to develop a natural method to successively sharpen the peak while avoiding any false lock as described in Variable IF Tracking Mechanism and Architectures Section. The text was incorrect and should have read: The above fact provides us with the basis to develop a natural method to successively sharpen the peak while avoiding any false lock as described in Variable IF Tracking Mechanism and Architectures Section. Figure 15(a) shows the GPS C/A-code correlation functions at baseband for the direct (green circle), multipath components (red plus and black cross), The texts were incorrect and should have read: Figure 15(a) shows the GPS C/A-code correlation functions at baseband for the direct (green circle), multipath components (red cross and black plus), Figure 15(b) shows the envelopes of the correlation function at fif = 4fc for the direct (green circle), multipath components (red plus and black cross), The texts were incorrect and should have read: Figure 15(b) shows the envelopes of the correlation function at fif = 4fc for the direct (green circle), multipath components (red cross and black plus), The effect is reserved if a multipath signal is out of phase with the direct signal. The texts were incorrect and should have read: The effect is reversed if a multipath signal is out of phase with the direct signal. U.S. Patent Pending (Application No. US 62/124,172). Thanks go to an anonymous reviewer for his or her insightful comments and also to Drs. Liwen Dai and Steven Rounds for their technical questions during an ION So Cal Chapter presentation at Torrance, CA [33], which help improve the quality and clarity of the manuscript. The texts were incorrect and should have read: Thanks go to an anonymous reviewer for his or her insightful comments and also to Drs. Liwen Dai and Steven Rounds for their technical questions during an ION So Cal Chapter presentation at Torrance, CA [33], which help improve the quality and clarity of the manuscript. 29. Yang, C., “FFT-Acquisition of Periodic, Aperiodic, Punctual, and Overlaid Codes in GPS,” Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 137–147. The Reference 29 should have read: 29. Yang, C., “FFT-Acquisition of Periodic, Aperiodic, Puncture, and Overlaid Code Sequences in GPS,” Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 137–147. Reference 34 should be added in the reference list. 34. Yang C., “Pinch the Correlation Function: A Method to Improve Delay Estimation in Multipath,” In Press, May 2016.
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Dec 4, 2017
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