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Autonomous driving technology has made significant advances in recent years. In order for self-driving cars to become practical, they are required to operate safely and reliably even under adverse driving conditions. However, most current autonomous driving cars have only been shown to be operational under amiable weather conditions, i.e., on sunny days on dry roads. In order to enable autonomous...
TSR (Traffic Sign Recognition), a part of ADAS (Advanced Drive Assistance System), helps driver (or car) to recognize traffic signs ahead with using front camera. According to EURO NCAP rating policy, car should be able to warn the driver when the car's speed is above the set speed threshold. It is thought that various types of traffic sign should be recognized to get more detailed information of...
This study proposes a flight control system for tailless unmanned combat aerial vehicles (UCAVs) and applies it to a representative example: the UCAV1303, an unstable blended wing body (BWB) aircraft. The UCAV1303 has no tail wing and a large sweepback angle, as a result of which it shows highly nonlinear aerodynamic characteristics such as wing rock and the pitch break phenomenon. In particular,...
In this paper, we propose a high-speed LDPC encoder architecture for the DVB-S2 standard. The proposed LDPC encoding architecture is based on parallel 360 bit-wise operations. The key issues for realizing a high speed are two kinds of index addresses and making efficient use of memory. We implemented a half-rate LDPC encoder on an FPGA, and confirmed that its maximum throughput is up to 10 Gbps with...
Soft-based linear block codes combined with linear modulation cannot obtain coding gains by increasing the number of iterations. In this paper, we propose rate-compatible turbo product codes with extended BCH codes using zero padding and shortening the row and/or column to adapt a next-generation (NG) Digital Video Broadcasting-Return Channel by Satellite (DVB-RCS) system. In addition, in order to...
Turbo-φ codes channel coding algorithms for next generation DVB-RCS system to avoid flattening at very low bit error rates. Turbo-φ codes which extended version of conventional double binary turbo codes (m=2) can lead to better performance. This paper focus on permutation patterns and puncturing patterns for triple binary turbo codes (m=3) in order to provide various coding rates.
MIMO system generally requires more than one antenna at the communication device. However, many wireless devices are limited by size, cost or hardware complexity to one antenna. To overcome such restrictions, we used a new technique, called cooperative communication. We propose a new cooperative transmission strategy system using cross-layer coding method base on H-ARQ for optimal communication. And...
In wireless communication, it requires a high speed transmission with various services and a high reliability. To satisfy these needs, the LDPC code and STC technologies are actively researched. Concatenating LDPC codes to the transmit diversity achieves the coding gain from the concatenated LDPC codes and the diversity gain from the transmit diversity. In this paper, to feed the soft values to LDPC...
High quality and high speed multimedia services will be required in the next generation mobile communications. To satisfy these services, powerful error correction techniques are used. ARQ (auto repeat request) techniques, aspects of the throughput, and FEC (forward error correct) techniques have disadvantages in terms of reliability. H-ARQ (hybrid auto repeat request) systems have been studied extensively...
T-DMB (terrestrial digital multimedia broadcasting) system, is based on the Eureka-147 standard, provides various multimedia data services. However T-DMB needs more various services and higher throughput while maintaining reception. Therefore, this paper proposes advanced T-DMB system using the unequal error protection system, hierarchical modulation and double binary turbo code, while maintaining...
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