An internal antenna with a system ground for digital video broadcasting-handheld (DVB-H) service is proposed. The proposed antenna consists of a main patch with a two-step slit, two additional elements, and a system ground. The antenna has a small volume, 36mm×11mm×6mm, and an average gain of -2.22dBi to -0.06dBi over the DVB-H band.

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This letter proposes a QoS control method for video streaming service over wireless networks. Based on statistical analysis, the time-varying MAC parameters highly related to channel condition are selected to predict available bitrate. Adaptive bitrate control of scalably-encoded video guarantees continuity in streaming service even if the channel condition changes abruptly.

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In this paper, we propose a method to ensure larger number of channels than the current Satellite Digital Multimedia Broadcasting (S-DMB). For Backwards Compatibility (BC) for legacy subscribers, we apply Hierarchical Eight Phase Shift Keying (H-8PSK) modulation and Low Density Parity Check (LDPC) code. Using the newly proposed method, we simulate the performance deterioration of the existing stream and the performance of the new stream according to code rates of LDPC and deviation angle. As the result, we present the optimal deviation angle, which produces the least performance deterioration of the existing system and the best performance of the new system, drawing satisfiable improvement in transmission rate.

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