Method and apparatus for reconstructing data

Patent metadata

Field	Value
Publication number	US-9350569-B2
Application number	US-201414164675-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Jul 25, 2011
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

Embodiments of the present invention provide a method and an apparatus for reconstructing data. The method includes: acquiring a self-correlation function of a root raised cosine filter coefficient and a fading factor of each antenna of channel estimation; constructing an L-dimension matrix of the self-correlation function according to the antenna; processing a result of superposing the L-dimension matrix of the self-correlation function and the fading factor of each antenna to obtain an estimate value of an actual fading factor of the each antenna; and reconstructing received data according to the estimate value of the actual fading factor to obtain reconstructed data used for cancellation. In the embodiments of the present invention, a process of performing interference cancellation for data reconstruction is closer to an actual sending process and closer to an originally sent signal, thereby improving cancellation efficiency and reducing interference.

First claim

What is claimed is:

1. A method for reconstructing data, comprising:
acquiring, by a receive end, a self-correlation function of a root raised cosine filter coefficient and a fading factor of each antenna of channel estimation;
constructing, by the receive end, an L-dimension matrix of the self-correlation function according to the antenna, where L is the number of valid paths found by said each antenna;
processing, by the receive end, a result of superposing the L-dimension matrix of the self-correlation function and the fading factor of each antenna to obtain an estimate value of an actual fading factor of the each antenna; and
reconstructing, by the receive end, received data according to the estimate value of the actual fading factor to obtain reconstructed data used for interference cancellation;
wherein the processing the result of superposing the L-dimension matrix of the self-correlation function and the fading factor of each antenna to obtain an estimate value of an actual fading factor of the each antenna comprises:
performing a solving operation on the result of superposing the L-dimension matrix of the self-correlation function and the fading factor of each antenna to obtain the estimate value of the actual fading factor of the each antenna;
performing inversion on the L-dimension matrix of the self-correlation function to obtain an L-dimension inverse matrix of the self-correlation function; and
performing deconvolution processing on the result of superposing the fading factor of each antenna and the L-dimension inverse matrix of the self-correlation function to obtain the estimate value of the actual fading factor of the each antenna.

2. The method according to claim 1 , wherein the performing the solving operation on the result of superposing the L-dimension matrix of the self-correlation function and the fading factor of each antenna to obtain the estimate value of the actual fading factor of the each antenna comprises:
performing the solving operation on the result of superposing the L-dimension matrix of the self-correlation function and the fading factor of each antenna according to a method of solving a set of linear equations to obtain the estimate value of the actual fading factor of the each antenna.

3. The method according to claim 1 , wherein the performing inversion on the L-dimension matrix of the self-correlation function comprises: performing the inversion on the L-dimension matrix of the self-correlation function according to a successive over relaxation method (SOR) or a decomposition method.

4. The method according to claim 3 , wherein the reconstructing received data according to the estimate values of the actual fading factors to obtain actual sent data comprises:
adding fading to the received data according to the estimate values of the actual fading factors to obtain the actual sent data.

5. The method according to claim 4 , wherein the method further comprises:
reordering locations of the L paths and locations of fading factors according to an antenna number, so that the paths and the fading factors are separately arranged according to different antennas.

6. An apparatus for reconstructing data, comprising:
a processor;
and a computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
acquiring a self-correlation function of a root raised cosine filter coefficient and a fading factor of each antenna of channel estimation;
constructing an L-dimension matrix of the self-correlation function according to the antenna, wherein L is the number of valid paths found by said each antenna;
processing a result of superposing the L-dimension matrix of the self-correlation function constructed by the constructing unit and the fading factor of each antenna acquired by the acquiring unit to obtain an estimate value of an actual fading factor of the each antenna; and
reconstructing received data according to the estimate value of the actual fading factor obtained by the processing unit to obtain reconstructed data used for interference cancellation;
wherein the processor
is configured to perform a solving operation on the result of superposing the L-dimension matrix of the self-correlation function constructed by the constructing unit and the fading factor of each antenna acquired by the acquiring unit to obtain the estimate value of the actual fading factor of the each antenna;
is configured to perform inversion on the L-dimension matrix of the self-correlation function to obtain an L-dimension inverse matrix of the self-correlation function; and
is configured to perform deconvolution processing on the result of superposing the fading factor of each antenna acquired by the acquiring unit and the L-dimension inverse matrix of the self-correlation function obtained by the inverting unit to obtain the estimate value of the actual fading factor of the each antenna.

7. The apparatus according to claim 6 , wherein the processor is configured to perform a solving operation on the result of superposing the L-dimension matrix of the self-correlation function and the fading factor of each antenna according to a method of solving a set of linear equations to obtain the estimate value of the actual fading factor of the each antenna.

8. The apparatus according to claim 6 , wherein the processor is configured to perform inversion on the L-dimension matrix of the self-correlation function according to a successive over relaxation method (SOR) or a decomposition method to obtain the L-dimension inverse matrix of the self-correlation function.

9. The apparatus according to claim 8 , wherein the processor is configured to add fading to the received data according to the estimate values of the actual fading factors obtained by the processing unit to obtain the reconstructed data used for cancellation.

10. The apparatus according to claim 9 , wherein the processor:
is configured to reorder locations of paths and locations of fading factors according to an antenna number, so that the paths and the fading factors are separately arranged according to different antennas.

11. The apparatus according to claim 9 , wherein the apparatus is a receiver or integrated into a receiver.

Assignees

• Huawei Tech Co Ltd

Inventors

• Jiang Na
• Jiang Yanbin

Classifications

• H04L1/06

  using space diversity · CPC title

• H04L25/0224

  using sounding signals · CPC title

• H04L25/0212 Primary

  of impulse response · CPC title

• H04L25/0202 Primary

  Channel estimation · CPC title