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Self-adapting transmitting method using channel statistical information in multi-aerial transmission system

A multi-antenna transmission and adaptive transmission technology, applied in diversity/multi-antenna systems, space transmit diversity, advanced technology, etc., can solve the time-varying wireless channel, delay frequency offset of channel estimation and feedback, difficulty in transmitting end Obtaining channel status information, etc.

Inactive Publication Date: 2008-08-27
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

However, due to the time-varying nature of the wireless channel, the time delay of channel estimation and feedback, and the frequency offset, it is difficult to obtain complete channel state information at the transmitter

Method used

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  • Self-adapting transmitting method using channel statistical information in multi-aerial transmission system
  • Self-adapting transmitting method using channel statistical information in multi-aerial transmission system
  • Self-adapting transmitting method using channel statistical information in multi-aerial transmission system

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Experimental program
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specific Embodiment approach

[0076] Receiving end:

[0077] 1) If the implicit feedback mode is adopted, calculate the signal-to-noise ratio γ, feed back the signal-to-noise ratio γ to the sending end, and skip to step 6); otherwise, go to step 2).

[0078] 2) Use the received signal for channel estimation, calculate the signal-to-noise ratio γ, and use the formula [4] and formula [5] to calculate the transmission correlation matrix R t and receive correlation matrix R r .

[0079]3) Perform eigendecomposition on the sending correlation matrix and receiving correlation matrix to get U t and U r .

[0080] 4) Using the result of eigendecomposition U t , U r and formula [8] to calculate the channel coupling matrix Ω.

[0081] 5) Change the R t , Ω and γ are fed back to the sending end, and go to step 9).

[0082] sender:

[0083] 6) Use the channel estimation result of the sending end to receive the link H and the channel reciprocity H=H T , according to the formula [4] and formula [5] to calcula...

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Abstract

The self-adaptation transmission method which uses the channel statistical information in a multi-antenna transmission system can improve the frequency spectrum efficiency and the power efficiency of the communication system greatly. The transmission method includes the steps that the result of channel estimation is used to calculate the statistical information of the channel; namely, the channel coupling matrix of the character pattern / the character pattern of the transmission correlative matrix and the SNR; the statistical information can be obtained from the receiver or the transmitter; the power distribution and the precoding transmission are processed in the transmitter according to the channel statistical information of the feedback or the hidden feedback of the receiver. The self-adaptation transmission method provides a self-adaptation transmission proposal of the multi-antenna system, which uses the channel statistical information; the self-adaptation transmission method can adjust the transmission parameters according to the statistic characteristics of the channel; the obtained mutual information quantity approximates to the capacity of the channel.

Description

technical field [0001] The present invention relates to a mobile communication system for transmitting high-speed data by using multiple transmitting / receiving antennas, and in particular to a multi-antenna system adaptive transmission method using channel statistical information. Background technique [0002] In order to meet the needs of future development, the last three generations (B3G) or the fourth generation (4G) mobile communication system is required to be able to support high-speed packet data transmission of tens of megabits per second or even gigabits per second. Under the current situation, the use of multi-antenna transmission and multi-antenna reception (MIMO) wireless transmission technology, fully exploiting and utilizing space resources, and maximizing spectrum utilization and power efficiency have become the key to the research of the next three generations of mobile communications. [0003] Compared with traditional single-antenna transmission and single...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04B7/04
CPCY02D30/70
Inventor 高西奇李潇江彬
Owner SOUTHEAST UNIV
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