Transmission method of non-codebook pre-coding in long term evolution-advanced (LTE-A) system

A technology of LTE-A and transmission method, which is applied in the field of wireless mobile communication, and can solve the problems of codebook precoding algorithm complex feedback codebook sequence number and occupied channel resources, etc., achieving low algorithm complexity, less occupied channel resources and excellent performance Effect

Inactive Publication Date: 2012-01-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the existing LTE-A uplink based on the codebook precoding algorithm complexity and the feedback codebook sequence number occupying channel resources, and propose a non-codebook precoding in the LTE-A system uplink transfer method

Method used

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  • Transmission method of non-codebook pre-coding in long term evolution-advanced (LTE-A) system
  • Transmission method of non-codebook pre-coding in long term evolution-advanced (LTE-A) system
  • Transmission method of non-codebook pre-coding in long term evolution-advanced (LTE-A) system

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Embodiment 1

[0029] A transmission method for non-codebook precoding in the uplink of an LTE-A system, involving transmission operations at two operating terminals, a terminal and a base station, the steps of which are as follows figure 1 As shown, it mainly includes:

[0030] For terminal,

[0031] Step S101: For a certain time t, obtain the channel state information at time t-τ through channel estimation, and perform geometric mean decomposition (GMD) on it to obtain the precoding matrix P;

[0032] Step S102: if figure 2 As shown, according to the precoding matrix P, precoding is performed on the channel-coded and symbol-modulated signal s to be transmitted, and the precoded data, specific pilot sequence, and transmission signal power sent to the transmission channel at time t; where the specific pilot sequence is a specific all-0 sequence; for the base station,

[0033] Step S201: Calculate the noise power in the transmission process according to the specific pilot sequence After ...

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Abstract

The invention relates to a transmission method of non-codebook pre-coding in a long term evolution-advanced (LTE-A) system, which belongs to the field of wireless mobile communications. The method comprises the following steps that: a terminal utilizes the obtained channel information to perform geometric mean decomposition to obtain a pre-coding matrix and complete the pre-coding of sent signals; in a base station, a unitary matrix Q and an upper triangular matrix R can be obtained by calculation and then a quick response (QR) decomposition based particle in cell (PIC) algorithm is adopted to perform the multi-input and multi-output (MIMO) detection and decoding of received signals, and then channel sub-space tracking technology is used, and the signals are pre-coded by the unitary matrix Q and then are sent to the terminal; and at the terminal, a unitary matrix P can be obtained by calculation in the same method, and the received signals are detected by the unitary matrix P and simultaneously are pre-coded. In the method, the algorithm has low complexity, and the feedback codebook sequence number occupies less channel resources, so that the channel utilization can be improved, the interference of the front layer sub-channel to a certain sub-channel signal can be eliminated without amplifying noise, and further, the error propagation effect is effectively reduced.

Description

technical field [0001] The invention relates to a non-codebook precoding transmission method in an LTE-A system, in particular to a non-codebook precoding transmission method in an LTE-A system uplink, and belongs to the field of wireless mobile communications. Background technique [0002] In order to provide higher-speed packet services and improve spectrum utilization, the long-term evolution is further developed on the basis of the third-generation mobile communication, and finally a long-term evolution mobile communication system beyond the third generation is formed. [0003] The LTE-A system (Long Term Evolution-Advanced, advanced long-term evolution system) is a next-generation evolution system of the LTE system. In order to obtain a higher data rate, the uplink of the LTE-A system uses SU-MIMO (Single User MIMO, single-user spatial multiplexing) technology, and supports the uplink configuration of 2 or 4 transmit antennas. At this time, the terminal acts as the sen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08
Inventor 安建平卢继华郑建勇李祥明
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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