Effect of Timing Misalignment on Performance of Uplink Synchronized DS-CDMA Systems

Duk-Kyung KIM
Seung-Hoon HWANG

IEICE TRANSACTIONS on Communications   Vol.E88-B    No.2    pp.807-810
Publication Date: 2005/02/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.2.807
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
uplink synchronized CDMA,  timing misalignment,  

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The uplink synchronous transmission scheme was proposed to improve the uplink performance of DS-CDMA systems. However, previous performance analyses have assumed perfect uplink synchronization among main paths, which is impractical due to timing misalignment. Accordingly, this Letter evaluates the impact of imperfect synchronization on the performance of an uplink synchronized DS-CDMA system by deriving an orthogonality factor as a measure of the imperfection in synchronization.