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Fast antijamming timing acquisition using multilayer synchronization sequence

Fast antijamming timing acquisition using multilayer synchronization sequence
Fast antijamming timing acquisition using multilayer synchronization sequence
Pseudonoise (PN) sequences are widely used as preamble sequences to establish timing synchronization in military wireless communication systems. At the receiver, searching and detection techniques, such as the full parallel search (FPS) and the serial search (SS), are usually adopted to acquire correct timing position. However, the synchronization sequence has to be very long to combat jamming that reduces the signal-to-noise ratio (SNR) to an extremely low level. In this adverse scenario, the FPS scheme becomes too complex to implement, whereas the SS method suffers from the drawback of long mean acquisition time (MAT). In this paper, a fast timing acquisition method is proposed, using the multilayer synchronization sequence based on cyclical codes. Specifically, the transmitted preamble is the Kronecker product of Bose–Chaudhuri-Hocquenghem (BCH) codewords and PN sequences. At the receiver, the cyclical nature of BCH codes is exploited to test only a part of the entire sequence, resulting in shorter acquisition time. The algorithm is evaluated using the metrics of MAT and detection probability (DP). Theoretical expressions of MAT and DP are derived from the constant false-alarm rate (CFAR) criterion. Theoretical analysis and simulation results show that our proposed scheme dramatically reduces the acquisition time while achieving similar DP performance and maintaining a reasonably low real-time hardware implementation complexity, in comparison with the SS scheme
0018-9545
3497-3503
Zhang, Jiaqi
f03a3c8d-ab78-40ef-9ab0-99b82477d424
Ge, Ning
2007bd68-f742-49e4-bbb4-8f77158f7e89
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Zhang, Jiaqi
f03a3c8d-ab78-40ef-9ab0-99b82477d424
Ge, Ning
2007bd68-f742-49e4-bbb4-8f77158f7e89
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80

Zhang, Jiaqi, Ge, Ning, Wang, Zhaocheng and Chen, Sheng (2013) Fast antijamming timing acquisition using multilayer synchronization sequence. IEEE Transactions on Vehicular Technology, 62 (7), 3497-3503. (doi:10.1109/TVT.2013.2253501).

Record type: Article

Abstract

Pseudonoise (PN) sequences are widely used as preamble sequences to establish timing synchronization in military wireless communication systems. At the receiver, searching and detection techniques, such as the full parallel search (FPS) and the serial search (SS), are usually adopted to acquire correct timing position. However, the synchronization sequence has to be very long to combat jamming that reduces the signal-to-noise ratio (SNR) to an extremely low level. In this adverse scenario, the FPS scheme becomes too complex to implement, whereas the SS method suffers from the drawback of long mean acquisition time (MAT). In this paper, a fast timing acquisition method is proposed, using the multilayer synchronization sequence based on cyclical codes. Specifically, the transmitted preamble is the Kronecker product of Bose–Chaudhuri-Hocquenghem (BCH) codewords and PN sequences. At the receiver, the cyclical nature of BCH codes is exploited to test only a part of the entire sequence, resulting in shorter acquisition time. The algorithm is evaluated using the metrics of MAT and detection probability (DP). Theoretical expressions of MAT and DP are derived from the constant false-alarm rate (CFAR) criterion. Theoretical analysis and simulation results show that our proposed scheme dramatically reduces the acquisition time while achieving similar DP performance and maintaining a reasonably low real-time hardware implementation complexity, in comparison with the SS scheme

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Published date: September 2013
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 356739
URI: http://eprints.soton.ac.uk/id/eprint/356739
ISSN: 0018-9545
PURE UUID: ed3012d5-53bb-42e5-b81e-d05a30e3f772

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Date deposited: 13 Sep 2013 09:11
Last modified: 06 Oct 2020 23:26

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