A planar near-field multi-point focusing wireless communication system and method based on focused waves
A wireless communication, plane technology, applied in baseband systems, multi-frequency code systems, modulated carrier systems, etc., to enhance flexibility, ensure communication security, and improve information transmission rates
Active Publication Date: 2022-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0005] Aiming at the current problem of being unable to meet the data transmission requirements of mobile terminals with high reliability, high security, high efficiency and high flexibility, the present invention proposes a planar near-field multi-point focused communication (Near Field Focus Communication, NFFC) system and method
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[0036] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to understand the features and advantages of the present invention more clearly.
[0037] A planar near-field multi-point focusing wireless communication system based on focused waves, comprising
[0038] The serial / parallel converter is used to convert the serial bit information b to be transmitted into 9 channels of parallel bit information.
[0039] The signal generator is used to generate a sinusoidal signal p(t) with a bandwidth of 1-4GHz and a center frequency of 2.45GHz as a detection signal.
[0040] The modulating module is used to modulate the 9 channels of parallel bit information to be transmitted into a modulated signal that can be transmitted to the antenna element of the receiving module through the wireless channel.
[0041] The transmitting module includes an antenna array composed of 4x4 patch antennas wi...
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The invention provides a planar near-field multi-point focusing wireless communication system and method based on focused waves, belonging to the technical field of wireless communication. The present invention utilizes the focal point generated by the planar time inversion mirror in the near field to carry digital information, and demodulates through a correlation detection algorithm at the receiving end. Compared with the existing near-field communication system, the present invention avoids inter-channel interference and ensures communication reliability by optimizing sub-carrier signals to make them orthogonal to each other; using the "space-time synchronous focus" characteristic of time inversion to make multipath information Focusing on the target point effectively avoids the risk of information being stolen and ensures the security of near-field communication; increases the number of focus points to increase the information transmission rate; the two transceiver modules are located in two planar arrays, which is convenient for planar integration, and its The spacing can be adjusted as needed, and the receiving and receiving planes do not need to be strictly aligned, which enhances the flexibility of the terminal equipment; the invention is suitable for short-distance communication applications such as mobile payment, access control, and gate identification at entrances.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a planar near-field multi-point focusing wireless communication system and method based on focused waves. Background technique [0002] Near Field Communication (NFC) is another short-range wireless communication technology after Bluetooth, infrared, Wi-Fi, and ZigBee. It is based on Radio Frequency Identification (RFID), allowing devices to Conduct non-contact point-to-point data transmission and data exchange between them. With the advent of the information age, the widespread development of various mobile Internet applications and the broad space for future development, it has become another new favorite in the information age, and it is also the next territory that major manufacturers and service providers are competing for. As a short-distance The available high-frequency wireless communication technology of near-field communication is about 10cm,...
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IPC IPC(8): H04W4/80H04L25/03H04L27/26
CPCH04W4/80H04L25/03006H04L25/03343H04L27/2601H04L27/2627H04L27/2649
Inventor 刘要红赵德双包金龙钟成
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA