| dc.contributor.author |
Chebil, J |
|
| dc.contributor.author |
Boashash, B |
|
| dc.contributor.author |
Deriche, M |
|
| dc.date.accessioned |
2012-01-03T06:43:14Z |
|
| dc.date.available |
2012-01-03T06:43:14Z |
|
| dc.date.issued |
2003-09 |
|
| dc.identifier.citation |
The 9th Asia-Pacific Conference on Communications, 2003. APCC 2003. Issue Date: 21-24 Sept. 2003 On page(s): 297 - 301 Vol.1 |
en_US |
| dc.identifier.isbn |
0-7803-8114-9 |
|
| dc.identifier.uri |
http://hdl.handle.net/10576/10769 |
|
| dc.description |
This paper presents the design of a joint source channel decoder using the sequence maximum a posteriori method, which is one of the residual redundancy techniques. The paper applies hidden Markov models to estimate the parameters of the Gilbert-Elliott channel model. A modified Baum-Welch algorithm is proposed where the estimation obtained from the direct method is taken as the initial estimates of the Baum-Welch algorithm, reducing time significantly.
Details about non-stationary systems and signals can be found in the comprehensive book on Time-Frequency Signal Analysis and Processing (see http://www.elsevier.com/locate/isbn/0080443354).
In addition, the most recent upgrade of the original software package that calculates Time-Frequency Distributions and Instantaneous Frequency estimators can be downloaded from the web site: www.time-frequency.net. This was the first software developed in the field, and it was first released publicly in 1987 at the 1st ISSPA conference held in Brisbane, Australia, and then continuously updated). |
en_US |
| dc.description.abstract |
Previous studies highlighted the importance of using residual redundancy techniques in the design of a joint source channel decoder for the case of data transmission over binary symmetrical channel. This paper uses the sequence maximum a posteriori (MAP) method, which is one of the residual redundancy techniques to design a joint source channel coding with the representation of the wireless communication channel by the Gilbert-Elliott channel (GEC). The paper also discusses the issue of parameters estimation for the GEC channel. A new modification is suggested to the Baum-Welch re-estimation technique in order to improve its performance and reduces its computational requirements. |
en_US |
| dc.language.iso |
en |
en_US |
| dc.publisher |
IEEE |
en_US |
| dc.subject |
channel estimation |
en_US |
| dc.subject |
combined source-channel coding |
en_US |
| dc.subject |
fading channels |
en_US |
| dc.subject |
image coding |
en_US |
| dc.subject |
maximum likelihood estimation |
en_US |
| dc.subject |
mobile communication |
en_US |
| dc.subject |
visual communication |
en_US |
| dc.subject |
Baum-Welch re-estimation technique |
en_US |
| dc.subject |
Gilbert-Elliott channel |
en_US |
| dc.subject |
channel estimation |
en_US |
| dc.subject |
data transmission |
en_US |
| dc.subject |
fading channels |
en_US |
| dc.subject |
image transmission |
en_US |
| dc.subject |
joint source channel decoding |
en_US |
| dc.subject |
sequence maximum a posteriori method |
en_US |
| dc.subject |
wireless communication channel |
en_US |
| dc.title |
Combined source channel decoding for image transmission over fading channels |
en_US |
| dc.type |
Article |
en_US |