Precoding matrix index reporting and precoding processing method, system and apparatus thereof

A technology of precoding matrix and codeword index, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as large resource overhead

Active Publication Date: 2012-05-23
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0044] According to the above Table 3-Table 6, in the scenario of 8 antenna ports in the LTE-A system, if the RI is 1 or 2 or 3, the terminal needs to use at least 4 bits t

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  • Precoding matrix index reporting and precoding processing method, system and apparatus thereof
  • Precoding matrix index reporting and precoding processing method, system and apparatus thereof
  • Precoding matrix index reporting and precoding processing method, system and apparatus thereof

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Embodiment Construction

[0077] In order to save the resource overhead occupied by the terminal for transmitting PMI, an embodiment of the present invention provides a method for reporting a precoding matrix index. In this method, the terminal selects a part of the precoding matrix from the precoding matrix index table as the currently available precoding matrix. And select a precoding matrix from currently available precoding matrices, and report the compressed codeword index corresponding to the precoding matrix to the base station.

[0078] see figure 1 , an embodiment of the present invention provides a precoding matrix index reporting method, including the following steps:

[0079] Step 10: The terminal determines the precoding matrix index table corresponding to the current number of antenna ports and the RI value;

[0080] Step 11: The terminal obtains the preset mapping relationship between the compressed codeword index and the original codeword index, and selects the precoding corresponding ...

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Abstract

The embodiment of the invention discloses a precoding matrix index reporting and precoding processing method, a system and an apparatus thereof and relates to the wireless communication technology field. The method, the system and the apparatus are used to save resource costs occupied by a terminal which reports the precoding matrix. The method is characterized in that: the terminal determines an antenna port number and a precoding matrix index table corresponding to a rank indication (RI) value; the terminal acquires a mapping relation between a compressed code word index and an original code word index and selects precoding matrixes corresponding to the original code word index which is mapped by the compressed code word index to be the current available precoding matrixes; one precoding matrix is selected from the current available precoding matrixes and the compressed code word index corresponding to the precoding matrix is determined; the compressed code word index is reported to a base station, wherein a bit number used by the reporting is not greater than the bit number which can express the precoding matrixes corresponding to all the compressed code word indexes which are comprised by the mapping relation. By using the method, the system and the apparatus of the invention, the resource costs occupied by the terminal which reports the precoding matrixes can be saved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a precoding matrix index reporting and precoding processing method, system and device. Background technique [0002] In a Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) system, if the transmitter can know the channel information in a certain way, it can optimize the transmitted signal according to the channel characteristics, thereby improving the receiving quality and reducing the complexity of the receiver. degree requirements. In practical systems, channel information is generally fed back in the form of quantized channel information to reduce feedback overhead and improve system transmission efficiency. [0003] A codebook-based implicit CSI (Channel State Information) feedback method is adopted in the Long Term Evolution (LTE) system. The terminal (UE) measures the downlink channel based on the pilot, and reports the number of data strea...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/00
Inventor 荆梅芳高秋彬张然然拉盖施肖国军
Owner DATANG MOBILE COMM EQUIP CO LTD
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