Combined Scheme for Fast PN Code Acquisition | ||||
| International Conference on Aerospace Sciences and Aviation Technology | ||||
| Article 36, Volume 13, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT- 13, May 26 – 28, 2009, May 2009, Page 1-8 PDF (109.96 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asat.2009.23533 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Salah Sayed Elagooz | ||||
| Egyptian Armed Forces. | ||||
| Abstract | ||||
| In direct-sequence wideband (DS-WB) systems, long spreading sequences are used to span multiple symbol intervals in order to remove spectral lines and to mitigate multiple access interference. The usage of long spreading sequences will result in a large search space during acquisition stage. As a result, the DS-WB systems will need a lot of time to achieve acquisition state. This paper proposes a combined acquisition scheme, known as Fast Serial Search Sequential Estimation (FSSSE), which could be applied to the direct sequence spread spectrum systems with long PN sequences. The proposed scheme is a combination of two acquisition schemes which are the serial search acquisition scheme and the rapid acquisition by sequential estimation (RASE) scheme. The proposed scheme gets the advantages of both schemes while overcome their drawbacks. The mean acquisition time of the proposed scheme is reduced 100 times compared to the conventional serial search scheme for PN sequence with a period of 215-1. | ||||
| Keywords | ||||
| Direct-sequence wideband spread spectrum system; PN code acquisition; Serial search acquisition scheme; Fast Serial search sequential estimation acquisition scheme; Rapid acquisition by sequential estimation scheme | ||||
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