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Space-time block code power distributing system and method

A space-time block code and distribution system technology, applied in the field of information transmission, can solve the problem of not considering the influence of different channel propagation environments, and achieve the effect of improving bit error performance

Inactive Publication Date: 2010-12-15
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The existing space-time block coding technology only starts from the purpose of improving the code diversity index, without considering the influence of different channel propagation environments

Method used

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  • Space-time block code power distributing system and method

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Embodiment Construction

[0030] The problem solved by the invention is to optimize the transmitting power of the transmitting antenna so that the anti-fading performance of the packet space-time code in the space-correlated propagation environment is the best. To optimize, we must first propose an optimized evaluation objective. Here we introduce the parameter of fading number as the optimization objective. It is the ratio of the variance of the signal-to-noise ratio of the received signal to the square of the mean value of the signal-to-noise ratio. It can accurately reflect the fading degree of the channel, and the change of the bit error rate of the symbol changes with the change of the number of fading. Since the receiving antennas are very close to each other, the correlation coefficients between different antennas at the transmitting end are the same for different receiving antennas. Therefore, the optimization of transmission power allocation for multiple receiving antennas is the same as the c...

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Abstract

The emission power allocation method for space-time grouping code comprises: inputting the signal into channel estimation and correlation coefficient calculation module (1) to estimate the impulse response value, counting to obtain the correlation coefficient; using the power allocation calculation module (2)to calculate power rate, applying feedback module (3)to feedback the rate to a power allocation module (4) for final emission power allocation. This invention improves error code rate obviously.

Description

technical field [0001] The invention relates to the field of information transmission in a multi-antenna communication system, in particular to a space-time block code power distribution system. Background technique [0002] The space-time coding scheme combines channel coding and multi-antenna technology, which can obtain diversity gain and coding gain, and has been extensively studied. Among them, the space-time block code is a very effective measure against fading. Although it cannot obtain coding gain, it has very low decoding complexity, and it can be realized by using a simple maximum likelihood decoding algorithm. The design and optimization criterion of space-time block codes is to obtain full diversity, which has nothing to do with the channel propagation environment. The transmit power of each antenna is the same. [0003] Next, space-time block coding will be explained. Here is a multi-antenna system with N transmitting antennas and M receiving antennas, the se...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L27/12
Inventor 付景兴王京
Owner BEIJING SAMSUNG TELECOM R&D CENT