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Abstract
Broadcasting live digital TV to a small battery-powered handheld device is very challenging. One of the most promising technologies to provide such services is DVB-H (Digital Video Broadcasting over Handheld). Power consumption has always been one of the most crucial challenges for handheld devices. In this paper, a novel Adaptive Modulation and Coding (AMC) framework is proposed for DVB-H systems to address the challenging problem of power consumption. The proposed power saving AMC framework operates by rearranging the transmitted frames in a pre-defined pattern. The adaptive receiver selects the appropriate modulation technique and/or code rate, one that achieves a target Bit Error Rate (BER), and then could be switched off and/or powered down resulting in significant potential for saving of reception and processing powers. Simulation of the DVB-H system under the proposed framework proved that the proposed power saving AMC framework is capable of achieving power saving up to 71.875% in COST207 Typical Urban 6-paths (TU6) channel. Furthermore, numerical analysis for the power saving potential and BER performance of the proposed framework is performed for both flat Rayleigh channel and multipath TU6 channel.
Highlights
Multimedia services demand has grown rapidly in the previous decade
The European Telecommunications Standards Institute (ETSI) ratified the standard for digital video broadcasting for handheld devices (DVB-H) in November 2004 [2], which is an amendment of the Digital Video Broadcasting (DVB)-T standard [3] for handheld devices
Simulation results illustrating power saving potential and Bit Error Rate (BER) performance of DVB-H system employing Adaptive Coding (AC), Adaptive Modulation (AM), and AMC schemes are given in Sections 5.3, 5.4, and 5.5, respectively
Summary
Multimedia services demand has grown rapidly in the previous decade. As a result, the Digital Video Broadcasting (DVB) project was founded in 1993 by the European Telecommunications Standards Institute (ETSI) with the goal of standardizing digital television services. A novel power saving AMC framework is proposed for DVB-H systems. The proposed framework features three power saving schemes: Adaptive Coding (AC), Adaptive Modulation (AM), or Adaptive Modulation and Coding (AMC), in order to reduce the receiver power consumption significantly. The novelty arises from the fact that the proposed framework is initiated from receiver in contrast to traditional AMC schemes that rely on the existence of a feedback channel (from receiver to transmitter) Such feedback channels are unfeasible in broadcast systems. The adaptive receiver selects the appropriate modulation technique and/or code rate, one that achieves a target Bit Error Rate (BER), and could be switched off and/or powered down resulting in significant potential for saving of reception and processing powers.
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