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SVD pre-coding method, pre-decoding method and system applying the methods

A pre-coding and pre-decoding technology, applied in baseband system components, diversity/multi-antenna systems, space transmit diversity, etc., can solve problems such as inability to obtain relatively accurate channel impulse responses, and achieve the effect of improving performance

Inactive Publication Date: 2009-06-10
SAMSUNG ELECTRONICS CO LTD +1
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  • Application Information

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Problems solved by technology

[0003] Therefore, the problem is: how to use these channel estimates to optimize the transmitter's transmission scheme and design the corresponding optimal receiver
However, to estimate the channel impulse matrix H, it is necessary to interpolate the estimated discrete channel response, but usually a more accurate channel impulse response H cannot be obtained

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  • SVD pre-coding method, pre-decoding method and system applying the methods
  • SVD pre-coding method, pre-decoding method and system applying the methods
  • SVD pre-coding method, pre-decoding method and system applying the methods

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Embodiment Construction

[0041] The present invention aims at how to obtain accurate channel impulse response H in MIMO-OFDM system under TDD mode. The following embodiments describe in detail the system block diagram and description, system frame structure design, UL Sounding signal description and ULSounding-based scheduling algorithm flow according to the present invention.

[0042] System Block Diagram

[0043] In TDD mode, the system block diagram of SVD precoding based on Uplink Sounding is as follows figure 2 shown. from figure 2 It can be seen that the system includes a transmitter, a receiver and a MIMO channel module. The transmitting end mainly includes: a channel coding module, a modulating module, a precoding SVD decomposition module, a fast Fourier inverse transform module, a multi-antenna transmitting module and a channel estimation module. The receiving end mainly includes: a multi-antenna receiving module, a fast Fourier transform module, a pre-decoding SVD decomposition module,...

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Abstract

The invention relates to a pre-coding method used for a transmitting terminal. The method comprises: received information bit is subjected to channel coding; the coded data is subjected to baseband modulation; according to a UL Sounding signal estimation channel matrix (H<T>), the channel matrix (H<T>) is analyzed to obtain an emission matrix (V) based on a singular value; the emission matrix (V)is utilized to precode the modulated data; and a result is distributed to an OFDM subcarrier and an data code element obtained is transmitted. The method can well solve the problem that a feedback channel in a feedback closed loop of a TDD system occupies more gap resources. In addition, compared with a method for estimating the channel by adopting a pilot frequency signal, the method adopts the UL Sounding signals of all subcarriers occupying distributive subbands to estimate the channel more accurately, thereby improving precoding performance.

Description

technical field [0001] The present invention relates to a coding method in a wireless communication system, more specifically, to a singular value decomposition precoding method based on Uplink Sounding, a predecoding method and a system using the method. Background technique [0002] As wireless services become more and more important nowadays, the demand for higher network capacity and higher performance is constantly growing. Several options such as higher bandwidths, optimized modulation schemes and even code multiplexing systems have limited potential to actually improve spectral efficiency. A Multiple Input Multiple Output (Multiple Input Multiple Output, MIMO) system adopts an antenna array and utilizes a space multiplexing technology to improve the efficiency of the used bandwidth. In many practical applications, channel parameters can be obtained through the feedback channel from the receiving end to the sending end (assuming that the feedback delay is much smaller...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04L25/02
Inventor 周雷梁宗闯何宏吴起程锦霞仲川郑旭峰王海
Owner SAMSUNG ELECTRONICS CO LTD