Performance Comparison of Auxiliary Vector and RAKE-MF Receiver for Transport of H.264/AVC Video Over DS-CDMA Wireless Channels

In this paper, we propose a robust transmission technique for packet-based H.264/AVC video transmission over DS-CDMA wireless channels using Auxiliary Vector (AV) and RAKE-MF receivers and confirm the superiority of the AV receiver. AV Filtering is an iterative algorithm that has fast convergence for short data records. In the proposed system, the H.264 video data packets are packetized and transported as per the RTP/UDP/IP protocol stack over a CDMA wireless physical layer link. Techniques like Packet Interleaving at NAL layer and Optimal Buffering at the link layer are been proposed and implemented to resolve the inherent tradeoff and improve the efficiency of the system without compromising on the realtime transmission bounds. We present results which confirm the superiority of the Auxiliary Vector over the RAKE-MF receiver for a wide range of user SNR and channel coding rates in terms of output video quality for two different video sequences. An optimal system for transmission of packet based H.264 video over CDMA wireless links has been designed and implemented under this context.