A Novel Differentially Coherent PN Code Acquisition Detector for DS-SS Communication Systems

適用於直序展頻通訊系統的差分同調碼獲取偵測器

蔡騰仕(Teng-Shih Tsai) ； 李志泓(Chih-Hung Lee) ； 洪集輝(Ji-Hwei Horng)

《國立金門大學學報》 1期 (2011/03) Pp. 39-51

https://doi.org/10.7056/JNQU.201103.0039

摘要

在直接序列展頻系統中，如何快速和可靠地尋找虛擬碼以達到碼同步是一個關鍵的步驟。在這篇論文裡，我們提出一個新的差分同調展頻碼獲取偵測器，它可應用於具有頻率偏移的快速雷利衰弱通道，並與傳統式I-Q非同調偵測技術進行性能比較，從數值分析結果可看出所提出的差分同調系統在性能上優於傳統式的I-Q非同調系統。

關鍵字

差分同調 ； 偽雜訊碼獲取 ； 同步 ； 直接序列展頻 ； 頻率偏移

並列摘要

Code synchronization is a critical step for fast and reliable code search in direct-sequence spread-spectrum (DS-SS) system. In this paper, we propose a novel differentially coherent (DC) detection scheme for rapid code acquisition over a fast Rayleigh fading mobile radio channel with frequency offset, and compare the performance with the conventional I-Q noncoherent detection scheme. Numerical results show that the proposed DC scheme outperforms the conventional I-Q noncoherent scheme.

並列關鍵字

Differentially coherent ； PN code Acquisition ； synchronization ； direct-sequence spread-spectrum (DS-SS) ； frequency offset

參考文獻

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