Light positioning assisted position-enabled wireless communication system and method
A wireless communication system, optical positioning technology, applied in wireless communication, radio transmission system, radio wave measurement system and other directions, can solve the problems of long-term calculation, inaccurate position information, lack of real-time channel status information, etc., to improve utilization efficiency, low complexity, and the effect of improving energy utilization efficiency
Pending Publication Date: 2021-12-07
SOUTHEAST UNIV
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Problems solved by technology
However, the acquisition of channel state information, that is, channel estimation, requires a long time and a large number of calculations.
For mobile users, this channel state information may lack real-time and contain multipath components, and the location information extracted from it will also be inaccurate
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Embodiment 1
[0047] Optical signals are characterized by narrow beams and high bandwidth, and will not interfere with communication radio frequency signals. The high directivity of the optical signal also improves the accuracy and energy utilization efficiency of the positioning system. The base station can optimize the beamforming of the radio frequency signal by obtaining the user location information and the user's surrounding environment information in real time through the optical positioning signal, so that the energy can be more accurately concentrated on the user. At the same time, the system uses the optical positioning subsystem to detect changes in the user's environment and channel status during the interval of channel estimation, and further assists in improving the accuracy and real-time performance of channel estimation.
[0048] Based on the above, see Figure 1-Figure 4 , this embodiment provides a location-enabled wireless communication system assisted by optical positio...
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The invention discloses an optical-positioning-assisted position-enabled wireless communication system and method, which are mainly used for acquiring user position information and user surrounding environment information in real time through an optical positioning subsystem, and optimizing beam forming of radio-frequency signals, so energy is more accurately concentrated on users. Meanwhile, the light positioning subsystem is used for monitoring the environment where the user is located and the change condition of the channel state in the channel estimation gap, and the accuracy and the real-time performance of channel estimation are further improved in an auxiliary mode. A base station emits an optical positioning signal which is periodically scanned in a free space, and a time-varying signal which is strictly related to a deflection angle is superposed on an original signal. And after receiving the optical positioning signal, the user reads direction information and sends a feedback signal along an optical signal path. And the feedback signal is obtained by superposing user information on the original optical positioning signal.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a position-enabled wireless communication system and method assisted by optical positioning. Background technique [0002] With the development of massive MIMO technology and the improvement of communication frequency bands, the energy of signal beams is more concentrated and more directional. However, this requires the base station to accurately acquire the user's location. If the user deviates from the beam arrival position, a large loss of beam energy will result. Based on this problem, technical concepts such as the integration of communication and positioning have been proposed. Through the processing of channel state information, the user's angle of arrival and distance can be extracted from it. However, the acquisition of channel state information, that is, channel estimation, requires a long time and a large number of calculations. For mobile use...
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Patent Timeline
Login to View More IPC IPC(8): H04B7/06H04B7/0413H04B7/0426H04W64/00G01S17/42
CPCH04B7/0617H04B7/063H04B7/0413H04B7/0426H04W64/006G01S17/42Y02D30/70
Inventor 张在琛王海卜
Owner SOUTHEAST UNIV