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Self-adaptive transmission method of vehicle speed mobile MIMO-SCFDE system

A MIMO-SCFDE, adaptive transmission technology, applied to the shaping network in the transmitter/receiver, baseband system components, preventing/detecting errors through diversity reception, etc.

Inactive Publication Date: 2012-11-28
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016]LTE supports mobility very well, but it does not use adaptive technology when moving fast, and sacrifices the spectral efficiency of the system in exchange for system availability

Method used

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  • Self-adaptive transmission method of vehicle speed mobile MIMO-SCFDE system
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  • Self-adaptive transmission method of vehicle speed mobile MIMO-SCFDE system

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Embodiment Construction

[0061] Below in conjunction with embodiment and description of drawings, the present invention will be further described:

[0062] What is given in the embodiment is the baseband simulation result without considering the influence of the synchronization error, that is, the synchronization is an ideal synchronization. Accompanying drawing has provided the system block diagram realizing the proposed method of the invention, and each module effect is as follows:

[0063] Source module 1: Generate bit information to be transmitted. According to the result returned by the reverse channel 21 and the number of modulation systems used, the number M of the available sub-channels corresponding to the selection is generated s S equivalent time-domain data frames of the corresponding length.

[0064] Bit mapping module 2: Map the data generated by the information source to the corresponding points of the constellation diagram according to the modulation method adopted. In this embodime...

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Abstract

The invention discloses a self-adaptive transmission method of a vehicle speed mobile multiple input multiple output single carrier frequency domain equalization (MIMO-SCFDE) system. In the method, the combination of a simple precoding method and frequency selection is adopted to withstand channel rank deficiency and the system performance can commonly be superior to a non-self-adaptive MIMO-SCFDE system. The method of the invention has low feedback rate and can effectively solve the problems that a large amount of feedback information is needed to be passed back frequently under the condition of time-varying channel as well as the amount of the feedback information is large and the system performance is difficult to be ensured in the self-adaptive frequency-selecting block transmission method in the existing mobile MIMO broadband wireless channel. In the invention, a frequency domain sub-channel which is equalized to be amplified and has low noise is selected to transmit the information so as to cause Bit Error Rate (BER) performance not to be worsened excessively, and the BER performance has simple controllability. The method of the invention can preferably solve the problems of the excessive feedback information amount on the premise of ensuring the system performance and frequency selectivity and time selective fading.

Description

technical field [0001] The invention relates to an adaptive transmission method of vehicle speed mobile MIMO-SCFDE, which belongs to the multi-antenna broadband digital communication transmission method in the technical field of broadband wireless communication. Background technique [0002] Communication technology has developed rapidly in recent decades, especially since the 1990s, and has had a profound impact on people's daily life and the development of the national economy. Spectrum efficiency and complexity are two important goals that the wireless communication research field has been pursuing for many years. Multiple-input multiple-output (hereinafter referred to as MIMO: Multiple-inputMulltple-output) uses the uncorrelated characteristics of channels between different antennas in a rich scattering environment to obtain high channel capacity, thereby obtaining spectral efficiency that cannot be achieved by traditional single-antenna technology, but With the increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L25/03H04L27/26
Inventor 杜岩徐静李森
Owner SHANDONG UNIV
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