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Coding in 4G

Introduction


The error correcting schemes,widely used in modern systems, from one hand do not always fit the quality requirements, from the other hand are not based on the last theoretical achievements.

In this project the deeper analysis of the modern error correcting schemes in mobile networks should be performed.

Research of new efficient methods for coding and processing the signals for data transmission in sensor networks.

Project stages


LDPC codes

LDPC codes can achieve the high quality of data transmission with the comparatively low coding and decoding complexity. The procedure of coding and decoding of such codes allow effective parallel implementation. It may be used to create efficient schemes of data transmission in mobile systems based on the LDPC-codes. These schemes are supposed to use multi-channel adaptive transmission. For transmission of application multimedia data (video or audio) an unequal error protection scheme can be used.

Proposed approaches:

  1. multi-Layer coding based on LDPC-codes;
  2. СDMA based on LDPC-codes;
  3. adaptive coding based on LDPC-codes и cascade coding schemes;
  4. unequal error protection.

 

Transport layer coding

Transport layer coding is the method for transmission of data in networks with packet commutation. It suggests adding the redundant packets obtained in the result of the coding by the error correcting code.

This method can provide the decrease in the message delays even in the network with reliable channel. In the mobile networks it can improve the probability of message delivery in a fixed time interval.

Research targets


In this area the following results are planned:

  • to develop a transport layer coding scheme for enhancement transmission in mobile networks;
  • to explore the possibility of the joint coding on physical, data link and transport layers.

 

Status: 
On hold
Final deadline: 
Tuesday, October 30, 2007 (All day)