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| Study on Pseudo-noise Code Tracking Method for Compressive Domain Direct Sequence Tracking Telemetry and Command Communication Signals |
| Cheng Yan-he Yang Wen-ge |
| (Department of Optical and Electrical Equipment, Equipment Academy of PLA, Beijing 101416, China) |
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Abstract Compressive sensing has a preliminary application to the field of Tracking, Telemetry, and Command (TT&C) and communication, which can effectively decrease sampling and data rate, but there is a contradiction between the real-time requirement and the computationally expensive recovery algorithm. In this paper, based on the sparsity of Direct Sequence (DS) TT&C and communication signals, a compressive domain Pseudo-Noise(PN) code tracking loop based on random demodulation compressive sampler is proposed. The loop can directly extract the code phase from compressive signal samples, which does not need to recover original signal. Firstly, the loop model and its identification characteristics are analyzed. Secondly, through research on cross noise, tracking accuracy is analyzed. Theoretical analysis and simulation results show that the proposed loop can track PN code phase in compressive domain. The loop may have an important application value to the field of DS Spread Spectrum (SS) and DS/Frequency Hopping (FH) Hybrid SS (HSS) signal processing based on compressive sensing.
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Received: 29 December 2014
Published: 09 June 2015
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Corresponding Authors:
Cheng Yan-he
E-mail: cheng20130810@foxmail.com
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