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Performance of Standard Code-Tracking Loops in the Presence of Dual Tone Interference

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3 Author(s)
Sampaio-Neto, R. ; Pontificia Univ. Católica, Rio de Janerio, Brazil ; Polydoros, A. ; Scholtz, R.A.

The performance of sum/difference and reference/difference code tracking loops in direct-sequence spread-spectrum communication systems are fully analyzed and compared for nonwhite interference situations. In particular, symmetric dual-tone interference is considered and the worst case tone spacing and relative tone energies are determined. Parameterized curves of tracking-error variance and mean-time to lose lock are presented as a function of signal-to-interference ratio, dual tone spacing, and early-late gate delay difference.

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Communications, IEEE Transactions on  (Volume:34 ,  Issue: 10 )