"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 9, 2018

contents of issue      DOI  10.30898/1684-1719.2018.9.5     full text in Russian (pdf)  

Statistical analysis of noise communication system using two-channel correlation receiver

 V. I. Kalinin

Fryazino Branch of Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences,
Vvedensky Sq.1, Fryazino Moscow region 141190, Russia


The paper is received on August 31, 2018


Abstract. Covert noise communication system using spread spectrum technique is proposed. Wireless noise communications are characterised by informative safety of data transmission. An exact copy of coherent noise reference is required for optimal signal processing in correlation receiver. The reconstruction of coherent noise reference with frequency bandwidth over 1000 MHz is currently impossible using local generator disposed in a receiver. Communication systems apply the transmitted reference (TR) techniques for a data transmission with unknown properties of wideband noise carriers or propagation channels. Ultra-wideband (UWB) noise communication systems based on the code spectral modulation accomplish the time delay diversity between of noise reference and informative noise signals delayed at difference time intervals according to binary data transmission. TR techniques allow to significantly simplifying receiver structure as well as the whole transmission lines. In this case, the phase exact synchronization between of noise reference and informational signals at relative transmission is also not needed. The receiver synchronization is performed with lower requirements according to fed bit stream. Informative safety of wireless data transmission is achieved when the time delays of informative noise waveforms significantly exceed its coherent interval.  The time convolution of received continuous noise waveforms during every informative symbol is produced using the two-channel correlation receiver.  The time delay of each correlation channel corresponds to the time delay diversity of informative noise signal. The estimation problem, which arises from varying informative noise signals in a bit stream, potentially degrades the performance of noise communication system. Correlation estimations are statistical evaluated for data transmission accomplished throw additive Gaussian white noise channel. Intersystem jamming is excited in two channel correlator-based systems even if message data are transmitted over a wireless channel without thermal noise. This paper proposes the intersystem jamming reduction when the necessary requirements are satisfied, namely informative time delays and its difference are significantly exceed the coherent interval of UWB noise carriers.

Key words: wireless noise communications, spread spectrum, covert transmission, correlation signal processing, statistical estimation, intersystem jamming.


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For citation:
V. I. Kalinin. Statistical analysis of noise communication system using two-channel correlation receiver. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 9. Available at http://jre.cplire.ru/jre/sep18/5/text.pdf

DOI  10.30898/1684-1719.2018.9.5