Uplink space division multiple access system based on Doppler effect and implementation method

A technology of Doppler effect and space division multiple access, applied in the field of uplink space division multiple access mobile communication system, can solve the problems of increasing equipment complexity and cost, multiple radio frequency links, etc., to solve the problem of user capacity, system Flexible configuration and the effect of solving insufficient frequency resources

Active Publication Date: 2021-10-01
PEKING UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, space division multiple access (SDMA) takes advantage of the channel differences caused by users distributed in different locations in space, and uses antennas with spatial resolution capabilities, such as directional antennas or antenna arrays. T

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Uplink space division multiple access system based on Doppler effect and implementation method
  • Uplink space division multiple access system based on Doppler effect and implementation method
  • Uplink space division multiple access system based on Doppler effect and implementation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] The present invention is further illustrated in connection with the accompanying drawings, and the present invention is not intended in any way.

[0034] like figure 1As shown, the upstream space division multiple access system based on the Doppler effect of the present invention is a cellular system, including a base station, a plurality of users. Multiple users are in different directions of the base station, transmit data using the same frequency, and the user is in a status of still or low speed. The base station is fixed to the N roof-distributed N-open space distribution on the rotating disc, and the disc is rotated at an Ω angular velocity, and the radius of the disc is R. Only one antenna is only one antenna and the receiving link Unicom at some point. Other antennas Disconnected from the receiving link.

[0035] User 1, User 2, ·····, user M at the same time in the center frequency f c Send data to the base station, the signal bandwidth is W, so the frequency band ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an uplink space division multiple access system based on a Doppler effect and an implementation method. The uplink space division multiple access system comprises a base station and a plurality of users, N antennas are distributed at equal intervals on a rotating disc in the base station, the disc rotates at an angular velocity of [omega], and only one antenna is communicated with a receiving link at a certain moment; the system further comprises a demodulator, a band-pass filter, a frequency modulation module, an electronic switch and an antenna selection unit. According to the method, only the same frequency needs to be allocated to different users, when the users send data to the base station by adopting the same frequency, the Doppler effect is generated at the base station through the rotating antenna, and then the data sent by the different users by adopting the same frequency is separated through the filter, so that uplink space division multiple access mobile communication based on the Doppler effect is realized. The technical scheme of the invention is flexible in configuration and use, can effectively solve the problem of insufficient frequency resources of the mobile communication system, and effectively increases the user capacity.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a Doppler effect-based uplink space division multiple access mobile communication system and an implementation method. Background technique [0002] The Doppler effect is the change in the wavelength of an object's radiation due to the relative motion of the wave source and the observer. In front of the moving wave source, the wavelength becomes shorter and the frequency becomes higher (blue shift); when behind the moving wave source, the opposite effect will occur. The wavelength becomes longer and the frequency becomes lower (red shift); the higher the velocity of the wave source, the greater the effect. [0003] In mobile communication, when the mobile station moves towards the base station, the frequency becomes higher; when it moves away from the base station, the frequency becomes lower. Usually, because the Doppler effect will damage the performa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B7/0404H04B7/08H04L5/00H04L25/02H04W72/04
CPCH04B7/0404H04B7/0802H04L5/0023H04L25/0204H04W72/0453
Inventor 马猛冯浩
Owner PEKING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap