Sequential multi-antenna selectable transmitting method for code division multi-path channel

A transmission method and antenna selection technology, which are applied in the directions of diversity/multi-antenna system, space transmit diversity, etc., can solve the problem that it is difficult to calculate the closed-form solution of the channel capacity, etc., to reduce the amount of calculation, reduce the complexity, and improve the practicability. Effect

Active Publication Date: 2011-10-19
SOUTHEAST UNIV
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Problems solved by technology

However, unlike the systems corresponding to the previous antenna selection methods, the TD-HSPA+ system experiences multipath channels, and it is difficult to calculate the closed-form solution of the channel capacity, and the theoretically optimal antenna sele...

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  • Sequential multi-antenna selectable transmitting method for code division multi-path channel
  • Sequential multi-antenna selectable transmitting method for code division multi-path channel
  • Sequential multi-antenna selectable transmitting method for code division multi-path channel

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Embodiment Construction

[0028] The present invention is applicable to TD-HSPA + When the system is redundant due to the large number of transmitting antennas, antenna selection is needed to reduce the use of antenna ports and thus reduce the computational complexity. In the actual system, both LTE and TD-HSPA+ are currently aimed at dual streams. The reason for sending at most dual data streams is that under the existing system configuration and considering the limitations of actual channels, it is possible to send at most 2 streams. Realized, no matter how many data streams are demanding on the actual channel conditions, there is not much realization value under the trade-off.

[0029] For the dual-stream data parallel spread-spectrum transmission system, the wireless multipath fading channel coefficients are comprehensively considered when calculating the equivalent channel correlation matrix at the sending end of the system; according to the correlation matrix calculation method proposed by the pr...

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Abstract

The invention provides a sequential multi-antenna selectable transmitting method for code-division multi-path channel. The sequential multi-antenna selectable transmitting method is used for the combined antenna selection and beam shaping of a TD-HSPA+ and comprises the steps of replacing the downlink practical wireless multi-path channel parameters with the obtained uplink channel parameters; calculating the equivalent channel related matrix of a system; selecting the transmitting antenna to join in the data transmission by a sequential way; selecting the transmitting antenna according to the second characteristic value criteria of maximum equivalent channel related array; after selecting the antenna, calculating the related array RK of the selected antenna; carrying out beam shaping according to the characteristic vector of the RK and sending data stream. The sequential multi-antenna selectable transmitting method meets the experience truth that the system performance mainly depends on the data path of the dual streams with the worst sending channel quality, sufficiently considers the common influence factor of the multipath channel is sufficiently considered, and the system performance is improved greatly. Furthermore, according to the sequential antenna selecting method, the practical complexity the simplified and the feasibility is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to the design of a transmission preprocessing scheme in a multi-antenna system, belongs to the transmission preprocessing technology in a time-division spread spectrum multi-antenna system, and is a sequential multi-antenna selection transmission method for a code division multipath channel. Background technique [0002] TD-HSPA + It is a further evolution scheme of TD-HSPA introduced by 3GPP. For the physical layer link, it proposes a multi-antenna implementation scheme in which 8 transmit antennas are deployed on the base station side and 1 or 2 antennas are used by the mobile station to receive, and orthogonal poles can be used for the antennas. In order to reduce the size of the antenna and make the channels between the antennas as uncorrelated as possible; at the same time, TD-HSPA + Added support for 64QAM high-order modulation. The purpose of this enhanced technolog...

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Application Information

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IPC IPC(8): H04B7/06
Inventor 许威朱道华赵春明
Owner SOUTHEAST UNIV
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