Normalized-Energy-Detector Serial Search Acquisition Scheme for Packet Communication Systems with Non-ideal AGC

Authors:
Zhenyu Xiao;Depeng Jin;Lieguang Zeng
Affiliations:
State Key Laboratory on Microwave and Digital Communications, Tsinghua University, Beijing, China and Tsinghua National Laboratory for Information Science and Technology, Beijing, China and Depart ...;State Key Laboratory on Microwave and Digital Communications, Tsinghua University, Beijing, China and Tsinghua National Laboratory for Information Science and Technology, Beijing, China and Depart ...;State Key Laboratory on Microwave and Digital Communications, Tsinghua University, Beijing, China and Tsinghua National Laboratory for Information Science and Technology, Beijing, China and Depart ...
Venue:
Wireless Personal Communications: An International Journal
Year:
2012

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Abstract

Automatic gain control (AGC) is extensively used in practical packet communication systems, but the effect is generally not taken into account in code acquisition research. A dedicated investigation in this paper highlights the effect of non-ideal AGC on the performance of the extensively used envelope-detector (ED) serial search acquisition (SSA) scheme, for the performance loss due to non-ideal AGC is significant. To improve the acquisition performance and eliminate the effect of AGC, a normalized-energy-detector (NED) SSA scheme is proposed. Theoretical analysis and numerical results on the performance of the proposed scheme are given. Simulations are also performed to further justify the analysis and numerical results. Performance comparisons show that the proposed scheme outperforms the ED SSA scheme with ideal and non-ideal AGC. Moreover, the proposed scheme is free from influence of AGC, and no performance loss can be found even when using non-ideal AGC for the proposed method.