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Multiple-in and multiple-out communication method of signal asynchronous transmission

A multiple-input multiple-output communication method technology, applied in the field of communication using multiple antennas, can solve the problems of low receiving diversity at the receiving end, affecting link quality and system capacity, and the lack of delay diversity gain at the transmitting end.

Inactive Publication Date: 2007-01-24
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

For the multiple-input multiple-output communication method using hierarchical space-time codes, since the signals are transmitted simultaneously at the transmitting end, the transmitting end does not have the gain brought by delay diversity, and the receive diversity degree of the receiving end is low, which affects the link quality and system capacity
Aiming at the shortcomings of existing MIMO communication methods, currently known literature, patents and related publications have not yet provided a signal asynchronously transmitting MIMO communication method

Method used

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  • Multiple-in and multiple-out communication method of signal asynchronous transmission
  • Multiple-in and multiple-out communication method of signal asynchronous transmission
  • Multiple-in and multiple-out communication method of signal asynchronous transmission

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Embodiment Construction

[0114] A multiple-input multiple-output communication method for asynchronous signal transmission provided by the present invention includes two parts: a transmitter and a receiver, such as figure 2 , image 3 shown. An embodiment of the method is provided below, the number of transmitting antennas M=2, the number of receiving antennas N=2, the frame length of the data frame is S=2, E s =1, the average power distribution is adopted, the baseband pulse waveform adopts a rectangular wave, and the delay of the transmitting antenna is τ 1 = 0, τ 2 =0.6T s ,T s = 1μs, the added guard interval T g1 =0.6T s ,T g2 =0, the data in the guard interval is zero.

[0115] In the case of the above parameters, the specific implementation steps of a multiple-input multiple-output communication method for signal asynchronous transmission provided by the present invention are described as follows. The transmitter is as follows: figure 2 Shown:

[0116] At the transmitting end, after ...

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Abstract

This invention discloses a MIMO communication method for signal asynchronous emission characterizing that it applies a hierachical empty time code structure and an emitter delayes signals of different emission antennas and emits them asynchronously, a receiver applies an asynchronous MIMO test method to test signals, in which, the gain brought with time delay hierarchy is used by different time dealy to emission signals at the emission end and at the receiving end, the receiving hierarchy is increased by the MIMO test method to increase the link quality of the MIMO system.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a communication method using multiple antennas in the communication technology. Background technique [0002] Existing multiple input multiple output (Multiple Input Multiple Output, MIMO) communication methods are all based on synchronous signal transmission. Because the MIMO communication method has good spectrum efficiency, high system capacity and good communication quality, it is one of the key technologies of the new generation wireless communication system. [0003] The MIMO communication method adopts space-time coding technology, and there are two main types of space-time codes used: space-time trellis codes (Space Time Trellis Codes, STTC) and space-time block codes (Space Time Block Codes, STBC) based on transmit diversity. ; Layered Space Time Codes (LSTC) based on non-transmit diversity. [0004] Space-time trellis code is a design that comprehensively consid...

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Application Information

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IPC IPC(8): H04L1/06
Inventor 唐友喜孔婷赵宏志邵士海
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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