Performance evaluation of 4&amp;#x00D7;2 MIMO schemes for mobile broadcasting

Abstract-This paper investigates the distributed space-time (ST) coding proposals for the future Digital Video BroadcastingNext Generation Handheld (DVB-NGH) standard. We first theoretically show that the distributed MIMO scheme is the best broadcasting scenario in terms of channel capacity. Consequently we evaluate the performance of several ST coding proposals for DVB-NGH with practical system specifications and channel conditions. Simulation results demonstrate that the 3D code is the best ST coding solution for broadcasting in the distributed MIMO scenario. I. INTRODUCTIONIn order to meet the ever-increasing demand of mobile digital television (DTV) broadcasting, the Digital Video Broadcasting (DVB) consortium started the standardization process of the Next Generation Handheld specification (DVB-NGH) [1] at the beginning of 2010. DVB-NGH will be finalized in the first half of 2012 to acquire the leading position in the future mobile DTV market.Owing to the future extension frame (FEF) defined in DVBsecond generation Terrestrial (DVB-T2) [2], DVB-NGH can inherit many state-of-the-art transmission technologies such as low density parity check (LDPC) code, orthogonal frequencydivision multiplexing (OFDM) and, more importantly, can share the hardware as well as the frequency channel in a time division manner with the fixed DTV services. Being different from DVB-T2, the new DVB-NGH is expected to be able to deliver DTV services to the battery-powered mobile receivers efficiently, flexibly and reliably. To fulfill these requirements, DVB-NGH incorporates the multiple-input, multiple-output (MIMO) technique aiming at achieving higher throughput and improving the robustness of the mobile reception in severe broadcasting scenarios. This paper investigates the application of MIMO technique in the DTV broadcasting. We first show that the distributed MIMO scheme is the best choice among typical broadcasting scenarios from the channel capacity perspective. With this knowledge, we consequently evaluate several distributed space-time (ST) coding proposals for DVB-NGH. Simulations with DVB-NGH specifications in realistic channel conditions demonstrate that the 3D code [3] is the best ST coding scheme. The research results presented in this paper belong to the framework of the European CELTIC project "ENGINES" [4] which is an active contributor to the standardization of DVB-NGH.

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“…We investigate six important distributed MIMO coding proposals for the ongoing DVB-NGH standardization [15] in the following sections.…”

Section: St Coding Schemes With Four Transmit and Tow Receive Anmentioning

confidence: 99%

“…The Alamouti scheme is selected as the inter-cell ST coding endowing the overall ST scheme robustness in the presence of transmission power imbalance while preserving the efficiency of Golden code. The encoding matrix of 3D code is given in (15) (at the bottom of this page), where θ = 1+…”

Section: B Rate One St Codesmentioning

confidence: 99%

Enhanced mobile digital video broadcasting with distributed space-time coding

Liu

Crussière

Hélard

et al. 2012

2012 IEEE International Conference on Communications (ICC)

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“…The terrestrial and satellite transmitters can form a SFN network where either the terrestrial site or the satellite can have 1.1 State-of-the-Art of MIMO Signal Processing in DTT Systems multiple transmit antennas. During the DVB-NGH standardization multiple rate 1 and rate 2 SFBCs were proposed to optimize the performance in the distributed scenario [31,32]. Other codes have been proposed for DTT systems to optimize the performance in SFN scenarios as in [33] with high decoding complexity and similarly in [34] with a code design to significantly reduce the receiving computational complexity.…”

Section: State-of-the-art Of Mimo Signal Processing In Dtt Systemsmentioning

confidence: 99%

Transmit and Receive Signal Processing for MIMO Terrestrial Broadcast Systems

Paredero¹,

Eduardo²

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Multiple-Input Multiple-Output (MIMO) technology in Digital Terrestrial Television (DTT) networks has the potential to increase the spectral efficiency and improve network coverage to cope with the competition of limited spectrum use (e.g., assignment of digital dividend and spectrum demands of mobile broadband), the appearance of new high data rate services (e.g., ultra-high definition TV -UHDTV), and the ubiquity of the content (e.g., fixed, portable, and mobile). It is widely recognised that MIMO can provide multiple benefits such as additional receive power due to array gain, higher resilience against signal outages due to spatial diversity, and higher data rates due to the spatial multiplexing gain of the MIMO channel. These benefits can be achieved without additional transmit power nor additional bandwidth, but normally come at the expense of a higher system complexity at the transmitter and receiver ends. The final system performance gains due to the use of MIMO directly depend on physical characteristics of the propagation environment such as spatial correlation, antenna orientation, and/or power imbalances experienced at the transmit aerials. Additionally, due to complexity constraints and finite-precision arithmetic at the receivers, it is crucial for the overall system performance to carefully design specific signal processing algorithms.This dissertation focuses on transmit and received signal processing for DTT systems using MIMO-BICM (Bit-Interleaved Coded Modulation) without feedback channel to the transmitter from the receiver terminals. At the transmitter side, this thesis presents investigations on MIMO precoding in DTT systems to overcome system degradations due to different channel conditions. At the receiver side, the focus is given on design and evaluation of practical MIMO-BICM receivers based on quantized information and its impact in both the in-chip memory size and system performance. These investigations are carried within the standardization process of DVB-NGH (Digital Video Broadcasting -Next Generation Handheld) the handheld evolution of DVB-T2 (Terrestrial -Second Generation), and ATSC 3.0 (Advanced Television Systems Committee -Third Generation), which incorporate MIMO-BICM as key technology to overcome the Shannon limit of single antenna communications. Nonetheless, v ABSTRACT this dissertation employs a generic approach in the design, analysis and evaluations, hence, the results and ideas can be applied to other wireless broadcast communication systems using MIMO-BICM.The first part of the thesis analyses the performance and structure of MIMO precoders based on rotation matrices for 2×2 MIMO and focus on the case of cross-polar antennas, which is the preferred configuration in DTT systems in the UHF band. Analysis and evaluation with the information-theoretic limits of BICM systems and bit-error-rate simulations including channel coding show the interesting results that the performance of the precoder depends on the selected code-rate. While rotation can provide signific...

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