S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Journal Papers (저널논문_전기·정보공학부)
Sequence acquisition of DS-CDMA systems employing Gold sequences
- Lee, Yong-Hwan; Kim, Seung-Jun
- Issue Date
- IEEE Transactions on Vehicular Technology, vol.49, no.6, pp.2397-2404, Nov. 2000
- This paper considers sequence acquisition in direct-
sequence spread-spectrum (DS/SS) systems that use Gold
sequences as the multiple access pseudonoise (PN) sequence.
When long PN sequences are used, the design of an acquisition
scheme requires the characteristics of partial correlation of PN
sequences. For ease of analytic design, the partial correlation
of Gold sequences is approximated using a piecewise linearized
upper bound model. Since the acquisition of PN sequence in direct-
sequence code-division multiple access (DS-CDMA) systems
can be formulated as testing two simple hypotheses, we apply fixed
sample size (FSS) and sequential tests to detection of phase alignment.
When a sliding correlator-type structure is employed for
the acquisition scheme, the acquisition performance of Gold-sequence-
based DS-CDMA systems is analyzed and compared to
that of -sequence-based systems. Analytical results show that
the use of Gold sequences requires a mean acquisition time quite
comparable to the use of -sequences. Finally, analytical results
are verified by computer simulation.
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