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Method for realizing precoding and method for generating precoding matrices

A precoding matrix and precoding technology, applied in space transmit diversity, diversity/multi-antenna systems, and preventing/detecting errors through diversity reception, can solve problems such as low efficiency, antennas in shadow areas, and signal attenuation

Active Publication Date: 2014-11-05
ZTE CORP
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Problems solved by technology

For the terminal, due to the influence of factors such as the way the user holds the hand and the antenna polarization direction, among the multiple antennas, some antennas may be in the shadow area
Since the signals sent by the antennas in the shadow area will have great attenuation, the efficiency of sending signals on these antennas is very low. At this time, if the power amplifiers (PA, Power Amplifier, referred to as power amplifiers) of these antennas are still The open state will cause a waste of resources

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  • Method for realizing precoding and method for generating precoding matrices
  • Method for realizing precoding and method for generating precoding matrices
  • Method for realizing precoding and method for generating precoding matrices

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Embodiment Construction

[0054] figure 2 A flowchart of a method for implementing precoding, such as figure 2 Shown, the inventive method comprises:

[0055] Step 200: Save the precoding matrix set at the transmitting end and the receiving end.

[0056]In this step, the precoding matrices in the precoding matrix set have an antenna selection function to form a precoding matrix set with an antenna selection function, so that PAs of antennas in shaded areas with low signal transmission efficiency can be turned off. And each precoding matrix has its own precoding index in the precoding matrix set.

[0057] There are a total of X precoding matrices used to select N from M transmitting antennas in the precoding matrix set (ie codebook) with antenna selection function, and they are column vectors, and Among them, the mathematical symbols Represents the number of combinations of N selected from M, and among these X column vectors, N elements in each column vector have a value other than 0, and (M-N) ...

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Abstract

The invention provides a method for realizing precoding and a method for generating precoding matrices. Precoding matrix sets are set at a transmitting terminal and a receiving terminal; according to the signal quality of an measured antenna at the transmitting terminal, the receiving terminal selects the precoding matrix, and the selected precoding matrix is indexed and informed to the transmitting terminal; the transmitting terminal utilizes the precoding matrix corresponding to the precoding matrix index to pre-code the sent signal. The precoding matrix in the precoding matrix set has the function of selecting the antenna, so that the antenna with good antenna signal quality can be selected for transmitting according to the antenna signal quality, and the antenna with poor antenna signal quality can be closed, thus improving the efficiency for sending signals by multiple antennae, and saving the resources.

Description

technical field [0001] The present invention relates to communication system precoding technology, especially a method for realizing precoding between a terminal and a base station using single user spatial multiplexing (SU-MIMO, single user MIMO) technology and the generation of a determined precoding matrix set method. Background technique [0002] In wireless communication, if multiple antennas are used to transmit and receive at both the sending end and the receiving end, then spatial multiplexing technology can be used to obtain a higher data rate, that is, the same time-frequency resource is used at the transmitting end to send multiple data streams , and the channel coefficient matrix can be obtained through channel estimation at the receiving end, and then the data on each data stream can be demodulated. [0003] The precoding (Precoding) technology is a technology for preprocessing a signal at a transmitting end by using Channel State Information (CSI, Channel Stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04L1/06
Inventor 郝鹏王瑜新
Owner ZTE CORP
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