Reception terminal and a method for compensating inter-symbol interference and computer readable recording medium for performing the same

Patent metadata

Field	Value
Publication number	US-9305592-B1
Application number	US-201414583014-A
Country	US
Kind code	B1
Filing date	Dec 24, 2014
Priority date	Oct 21, 2014
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A reception terminal and a method for compensating for inter-symbol interference (ISI) in a two-dimensional (2D) data structure are provided. The method for compensating for ISI includes transmitting, from a transmission terminal, a plurality of source pixel values based on a source 2D data structure via a channel, receiving, at a reception terminal, a plurality of pixel values for compensation based on a 2D data structure, and compensating each of the plurality of pixel values for compensation to each of corresponding pixel values after compensation. The plurality of pixel values for compensation are changed values of the pixel values of the source pixels due to the ISI, and each of the pixel values after compensation is determined based on both of each of the pixel values for compensation and values of adjacent pixels thereof.

First claim

What is claimed is:

1. A reception terminal for compensating inter-symbol interference (ISI) in a two-dimensional (2D) data structure, the reception terminal comprising:
a processor,
wherein the processor receives a plurality of pixel values for compensation based on a 2D data structure for compensation via a channel and compensates each of the plurality of pixel values for compensation to each of pixel values after compensation, respectively,
wherein the plurality of pixel values for compensation are a distorted set of values of a plurality of source pixel values due to the ISI, and
wherein each of the pixel values after compensation is determined based on each of the plurality of pixel values for compensation and adjacent pixel values thereof, wherein each of the pixel values after compensation is determined according to a following equation 1
I′ (m,n) =I (m,n) −Δ( I (m−1,n−1) +I (m−1,n) +I (m−1,n+1) +I (m,n−1) +I (m,n+1) +I (m+1,n−1) +I (m−1,n) +I (m+1,n+1) )  [Equation 1]

where I′ (m,n) denotes the pixel values after compensation at a position (m, n),
I (m,n) denotes one of the plurality of pixel values for compensation at a position (m, n),
each of I (m−1,n−1) , I (m−1,n) , I (m−1,n+1) , I (m,n−1) , I (m,n+1) , I (m+1,n−1) , I (m+1,n) , I (m+1,n+1) denotes each of the adjacent pixel values, and Δ denotes a weight value.

2. The reception terminal of claim 1 , wherein a value of Δ is changed in accordance with an SNR.

3. The reception terminal of claim 2 , wherein the processor is implemented to perform a preprocessing process of a misalignment compensation with respect to each of the pixel values after compensation.

4. The reception terminal of claim 1 , wherein each of the pixel values after compensation is determined according to a following equation 2,
I′ (m,n) =I (m,n) −Δ 1 I (m−1,n−1) −Δ 2 I (m−1,n) −Δ 3 I (m−1,n+1) −Δ 4 I (m,n−1) −Δ 5 I (m,n+1) −Δ 6 I (m+1,n−1) −Δ 7 I (m+1,n) −Δ 8 I (m+1,n+1)   [Equation 2]

where I′ (m,n) denotes the pixel values after compensation at a position (m, n),
I (m,n) denotes one of the plurality of pixel values for compensation at a position (m, n),
each of I (m−1,n−1) , I (m−1,n) , I (m−1,n+1) , I (m,n−1) , I (m,n+1) , I (m+1,n−1) , I (m+1,n) , I (m+1,n+1) denotes each of the adjacent pixel values, and each of Δ 1 ˜Δ 8 denotes a weight value with respect to each of the corresponding adjacent pixel values,
wherein the weight value with respect to each of the corresponding adjacent pixel values is determined based on a reference page transmitted to the reception terminal, and each and all of pixel values in the reference page are a value of one (1).

Assignees

• Foundation Soongsil Univ Industry Cooperation

Inventors

• Lee Jaejin
• Jeong Seongkwon

Classifications

• G11B20/10212 Primary

  compensation for data shift, e.g. pulse-crowding effects · CPC title

• G11B7/0065 Primary

  Recording, reproducing or erasing by using optical interference patterns, e.g. holograms · CPC title

• G11B7/00781

  Auxiliary information, e.g. index marks, address marks, pre-pits, gray codes · CPC title

• G11B7/083

  relative to record carriers storing information in the form of optical interference patterns, e.g. holograms · CPC title

• G11B7/00772

  on record carriers storing information in the form of optical interference patterns, e.g. holograms · CPC title