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Limited transmission power and short TTI length impose a bottleneck on LTE UL performance in a coverage-limited scenario. This paper presents an effective coverage enhancement mechanism called TTI bundling to boost uplink VoIP performance in LTE FDD mode. Performance evaluation for TTI bundling with VoIP traffic is carried out by semi-static system simulation, and the impact from different bundling...
This paper proposes a novel fine granularity scalability coding framework with hybrid open-close loop structures (KRPS-FGS) based on key reference picture. The open-structure with single prediction loop is exploited to code non-key frames to achieve the best coding efficiency, which uses the highest quality image as the reference picture for both base and enhancement layer. To control drift, some...
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