LDPC and turbo coding assisted space-time block coded OFDM for H.26L compressed wireless video telephony

Abstract

http://www-mobile.ecs.soton.ac.uk Multi-rate System 4QAM I 8PSK 1 16QAM I 64QAM 240 480 I 720 1 960 I 1440 2 1 3 1 4 1 6 lOO/S 48 I 72 1 96 I 144 234 480 I 720 1 960 I 1440 I I I 240 1 480 1 720 1 1200 -Abdmct-In this contribution we propose a n LDPC assisted Space-Time Block Coded OFDM transceiver designed for wireless video telephony and characterise its performance when communicating over the UTRA wideband vehicular fading channels. Low Density Parity Cheek (LDPC) and turbo channel coding schemes are invoked, B y concatenating a space-time block coded OFDM scheme with powerful channel codes, the performance of the system can be substantially enhanced. The LDPC codec outperformed the turbo eodec in terms of both the achievable video and transmission frame error rate performance.