Open AccessDVB-S2 Channel Estimation and Decoding in The Presence of Phase Noise for Non-Linear Channels
Author(s) -
Urvashi Pal,
Horace King
Publication year - 2015
Publication title -
international journal of information, communication technology and applications
Language(s) - English
Resource type - Journals
ISSN - 2205-0930
DOI - 10.17972/ajicta2015111
Subject(s) - fading , computer science , channel (broadcasting) , decoding methods , multipath propagation , electronic engineering , digital video broadcasting , telecommunications , bandwidth (computing) , engineering
In a multipath fading channel of DVB-S2, smallscalevariations occur due to unwanted noise signal, which isdirectly related to the impulse response of a radio channel. Thevarying channel has to be estimated before decoding the signal atthe receiver for proper signal recovery. However, In the presenceof a time varying and correlated phase noise, proper estimation ofthe Channel Impulse Response (CIR) becomes difficult. Toovercome this problem, a pilot-aided joint channel estimation anddecoding method is proposed to obtain the initial estimate of thechannel. This technique is reliable and important for satellitecommunication as the Ku-band capacity is almost over crowdedand more satellite resources are needed. The results show thatIterative Channel Estimation technique results in a lower BER andimproved signal quality for DVB-S2, which fine-tunes the systemfor an efficient use of power and bandwidth of satellite resources.