Ms. Li Zhou Profile

Li Zhou

at PLA Univ of Science and Technology

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Author

Publications (4)

Proceedings Article | 11 November 2008 Paper

Smart antenna system

Li Zhou, Chuanhua Wen

Proceedings Volume 7136, 713643 (2008) https://doi.org/10.1117/12.804206

KEYWORDS: Antennas, Telecommunications, Free space optical communications, Adaptive optics, Laser communications, Optical antennas, Signal detection, Laser systems engineering, Free space optics, Optical arrays

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Proceedings Article | 26 November 2007 Paper

Research on antenna based on free-space laser communication

Li Zhou, Chuanhua Wen, Hao Deng

Proceedings Volume 6783, 67834L (2007) https://doi.org/10.1117/12.746505

KEYWORDS: Telescopes, Reflector telescopes, Telecommunications, Reflectors, Mirrors, Refractor telescopes, Laser communications, Objectives, Antennas, Space telescopes

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Proceedings Article | 5 October 2006 Paper

Research on telescope array for inter-satellites laser communication

Li Zhou, Chuanhua Wen

Proceedings Volume 6351, 63511Q (2006) https://doi.org/10.1117/12.690962

KEYWORDS: Telescopes, Space telescopes, Laser communications, Optical antennas, Telecommunications, Phased arrays, Antennas, Phased array optics, Optical communications, Satellites

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Recent years have seen an explosive increase in the application of inter-satellites laser communication system. Considerations make phased arrays an attractive target for optical communication applications. This paper proposes a novel telescope array for inter-satellites laser communication and investigates phased telescope arrays to be employed in receive terminals of free-space laser inter-satellites communication links. Potential advantages over single monolithic telescopes consist in non-mechanical adaptive fine pointing of the mainlobe and a reduction of terminal volume, mass and cost. First, the basic function, the interfaces, and the performance parameters of one telescope are given. Next, the structure of a receive telescope array are described, and then the performance parameters of this telescope array are discussed. The different performances including antenna gain and pattern of optical antenna and telescope array in inter-satellites laser communication system are given in this part. A quantitative assessment reveals that arrays using coaxial beam superposition are best suited for optical data communications. Based on this finding, the main characteristics of superimposing telescope arrays are calculated. And calculations prove that, in practical applications, telescope array has better performance than one telescope used in laser inter-satellites communication, and even more, the influence of incoherent background radiation is negligible. The analyses results show that smart antenna is better than optical antenna in this communication system. In many important aspects of phased array design, we will consider 1) Frequency Synchronization and 2) Beam steering as being of primary importance to the present analysis. Frequency synchronization is necessary for proper beam spatial coherence, while beam steering is critical to how this cohered beam is pointed in a desired direction. We will address system performance and implementation aspects of both issues in fiber optic control. Three basic architectures for beam steering control via optics have been reported and proposed.

Proceedings Article | 21 September 2006 Paper

Research on denoising in WDM laser inter-satellites communication system

Chuanhua Wen, Yang Su, Yuquan Li, Li Zhou

Proceedings Volume 6353, 63532B (2006) https://doi.org/10.1117/12.687270

KEYWORDS: Wavelets, Telecommunications, Signal to noise ratio, Optical filters, Receivers, Wavelength division multiplexing, Laser communications, Interference (communication), Satellites, Free space optics

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