Rapid acquisition of PN sequences with a new decision logic

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In this paper, a fast acquisition scheme of pseudonoise (PN) sequences for direct-sequence spread-spectrum systems is proposed. The scheme exploits a new decision logic not only to estimate chip values, but also to check the reliability of the chip estimates. As a result, the internal state of a PN sequence generator is estimated more accurately. We derive the probability of finding a correct state estimate and show that the proposed scheme can reduce the average number of chips for acquisition when compared with the conventional scheme. It is also shown that the performance improvement is more noticeable in the moderate signal-to-noise-ratio range.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2004-01
Language
ENG
Article Type
Article
Keywords

CODE-ACQUISITION; SEQUENTIAL ESTIMATION; PSEUDONOISE SIGNALS; DS/CDMA SYSTEMS; FADING CHANNELS; SCHEME

Citation

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.53, pp.49 - 60

ISSN
0018-9545
URI
http://hdl.handle.net/10203/950
Appears in Collection
EE-Journal Papers(저널논문)
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