Same-time same-frequency duplex electromagnetic communication method based on time reversal

A same-frequency full-duplex and time-reversal technology, which is applied in the field of microwave technology and communication, can solve the problem of large front-end space for transceivers, and achieve the effects of reducing complexity, increasing system capacity, and improving communication speed

Inactive Publication Date: 2016-12-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

As mentioned above, the current main schemes all use multi-antennas, that is, antenna arrays. However, according to traditional theories, in order to obtain good space diversity gain and space multiplexing gain for multi-antenna systems, the distance between antenna elements is required to be no less than half the working wavelength. This leads to a large space occupied by the front end of the transceiver, which is contrary to the development trend of miniaturization of mobile terminals.

Method used

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  • Same-time same-frequency duplex electromagnetic communication method based on time reversal
  • Same-time same-frequency duplex electromagnetic communication method based on time reversal
  • Same-time same-frequency duplex electromagnetic communication method based on time reversal

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Embodiment

[0019] The principle topology of the simultaneous and same-frequency full-duplex communication method provided in this embodiment is as follows: figure 2 As shown, adopt the following technical scheme:

[0020] A simultaneous same-frequency full-duplex electromagnetic communication method based on time reversal. The communication parties are respectively recorded as A terminal and B terminal, and each terminal includes a receiving antenna (R A , R B ) and the transmitting antenna (T A , T B ), the transmitting antenna T A , T B Both are array antennas that contain 3 antenna units and are spaced in a sub-wavelength distribution, and specifically include the following steps:

[0021] Step 1. For the communicating party A, on its receiving antenna R A Up-stimulate and emit a probe signal H for testing the channel A (t), after the space channel transmission, the other party of the communication is the transmitting antenna T of the B terminal B The probe signal is received...

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Abstract

The invention discloses a same-time same-frequency duplex electromagnetic communication method based on time reversal, relating to the technical field of microwave. The time-space focusing and super-resolution focusing properties of time reversal electromagnetic wave are used, only through the separation of a sub wavelength interval of the receiving and transmitting ends of two communication parties, the effective inhibition of self interference signals of the receiving and transmitting ends of a same communication party can be realized. At the same time, since the time inversion technology is used, even the interval between antenna units is in a sub wavelength state, the corresponding receiving and transmitting channels are still independent, thus according to the method provided by the invention, the communication module complexity can be reduced, the communication rate can be increased, and the system capacity is increased.

Description

technical field [0001] The invention relates to the field of microwave technology and the field of communication, in particular to a simultaneous same-frequency full-duplex electromagnetic communication method based on time inversion. Background technique [0002] Current mainstream wireless communication systems usually adopt a half-duplex (Half-duplex) communication mode, such as Time-division duplexing (TDD) and Frequency-division duplexing (FDD). Time division duplex uses time division multiplexing to isolate the transmit channel and receive channel from each other in time in the same channel; while frequency division duplex uses two different channels to assign the transmit channel and receive channel respectively, while in Realize simultaneous but different frequency sending and receiving functions in time. Since the traditional half-duplex communication mode cannot transmit and receive information simultaneously on the same channel with the same polarization, wireles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B1/52H04L5/14H04L25/08
CPCH04B1/40H04B1/525H04L5/14H04L25/085
Inventor 张一明李家林王秉中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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