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The IEEE 802.11p standard has been created for vehicle to vehicle and vehicle to infrastructure communications. Vehicular networks require vehicles to periodically broadcast beacons in order to detect nearby vehicles or road infrastructure nodes and exchange critical information. The IEEE 802.11p standard defines different data rates that can be used for such transmissions, but 6 Mbps has been generally...
Polar codes are a new class of block codes with an explicit construction that provably achieve the capacity of various communications channels, even with the low-complexity successive-cancellation (SC) decoding algorithm. Yet, the more complex successive-cancellation list (SCL) decoding algorithm is gathering more attention lately as it significantly improves the error-correction performance of short-to...
HTTP Adaptive Streaming (HAS) is becoming the de-facto standard for video streaming services over the Internet. In HAS, each video is segmented and stored in different qualities. Rate adaptation heuristics, deployed at the client, allow the most appropriate quality level to be dynamically requested, based on the current network conditions. Current heuristics under-perform when sudden bandwidth drops...
Although Cloud computing emerged for business applications in industry, public Cloud services have been widely accepted and encouraged for scientific computing in academia. The recently available Google Compute Engine (GCE) is claimed to support high-performance and computationally intensive tasks, while little evaluation studies can be found to reveal GCE's scientific capabilities. Considering that...
The emergence of many wireless standards is introducing the need of flexible multi-standard baseband receivers. To address this issue and to face the increasing demand of higher throughput for new greedy applications on mobile devices recent works propose multi-ASIP platforms for decoding algorithms. Furthermore dynamic evolution of communication parameters combined with the reduction of latency between...
Opportunistic selection aims to select a node that improves the overall system performance the most. Selection is challenging as the nodes are geographically distributed and have only local knowledge. Yet, selection needs to be fast in order to allocate more time to the data transmission phase that exploits the selected node's services. In this paper, we analyze the impact of imperfect power control...
Multi-point reception techniques for enhancing cell-edge throughput are currently under standardization in cellular wireless standards as Single Frequency Dual Cell (SFDC) [1] in 3GPP and as Single Carrier Multi Link(SCML) [2] in 3GPP2. Unlike soft-handover operation, User Equipment(UEs) at cell-edge (handover zone) can independently request data from adjacent cells in multi point operation. Although...
Turbo decoders for modern wireless communication systems are required to support a wide range of code rates. The maximum supported code rate has strong impact on the choice of turbo decoder algorithm and architecture. This paper explores the problem of achieving high performance with turbo decoders at high code rates, and provides solutions on algorithmic and architectural level. A standard-compliant...
In order to address the large variety of channel coding options specified in existing and future digital communication standards, there is an increasing need for flexible solutions. This paper presents a multi-core architecture which supports convolutional codes, binary/duo-binary turbo codes, and LDPC codes. The proposed architecture is based on Application Specific Instruction-set Processors (ASIP)...
Recently, various mobile terminals such as mobile phone and personal digital assistance (PDA), etc. are widely spreading out in our daily life. Multimedia application is often executed on such mobile terminals, and these terminals often tightly coupled with wireless communication. Forward error correction (FEC) is one of important and heavy tasks for wireless communication. Leading edge mobile embedded...
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