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The need for a real-time public transport information system is growing steadily. People want to plan their city commutes and do not like waiting for long hours, nor take a long route to reach their destination. The proposed hardware solution in this paper computes the shortest path to reach the destination in real time and gives that information to the bus driver. Artificial Neural Networks (ANN)...
In this paper, a new approach using the ultrasonic transceiver for the distance measurement between more points with the possible data communication is described. In the beginning, the paper deals with the theoretical problem of the ultrasonic distance measurement and how the communication can be coded into the transmission. Then it proposes a working hardware prototype which is capable to communicate...
Duty cycling has been the main concept for saving energy in sensor networks for a long time. Yet, additional overhead for synchronization and the fact that overhearing and idle listening cannot completely be prevented, motivated further research. Wake-up receiver, i.e., additional ultra-low power radios that are not switched off and can receive a so called wake-up signal, aim to fill this gap. The...
In this paper, a novel memory access reordering polyphase network (PPN) for 60 GHz filter bank multi-carrier (FBMC) offset QAM (OQAM) baseband receiver is presented. The 8X-parallelism architecture of PPN is integrated into our 8X-parallelism digital baseband receiver. The PPN is designed based on IEEE 802.15.3c and IEEE 802.11ad standards. The PPN contains three key modules including memory bank,...
Filterbank multicarrier modulation (FBMC) has been identified as a strong contender for dynamic spectrum access in the TV White Space, as FBMC transceivers are able to control out-of-band interference level without compromising flexible usage. This paper compares FBMC receiver architectures, providing performance and complexity analysis, based on closed form expressions and on an actual implementation...
GNSS is entering into a period of intense change over the next 5-10 years which will impact on users and operators of high-end GNSS equipment. For many years, GPS and GLONASS existed as the only systems. However, all is set to change with the advent of new global and regional systems (Galileo, Compass, IRNSS, GINS and QZSS), augmentation services and test satellites offering combined new and improved...
A scalable system architecture is proposed and demonstrated for spatial multiplexing over millimeter-wave line-of-sight communication links. The architecture decouples spatial channel separation from demodulation, allowing the system bandwidth and data rates to scale up, while performing spatial processing on a time scale matched to the slow time variations of the spatiotemporal channel. The spatially...
Clusters featuring the InfiniBand interconnect are continuing to scale. As an example, the ??Ranger?? system at the Texas Advanced Computing Center (TACC) includes over 60,000 cores with nearly 4,000 InfiniBand ports. The latest Top500 list shows 30% of systems and over 50% of the top 100 are now using InfiniBand as the compute node interconnect. As these systems continue to scale, the Mean-Time-Between-Failure...
This paper presents a support function for MPI derived datatypes on an enhancer of memory and network named DIMMnet-3. It is a network interface with vector access functions and multi-banked extended memory, which is under development. Semi-hardwired derived datatype communication based on RDMA with hardwired scatter and gather is proposed. This mechanism and MPI using it are implemented and validated...
A scalable system architecture is proposed and demonstrated for spatial multiplexing over millimeter-wave line-of-sight communication links. This architecture provides increased data capacity without increasing the channel bandwidth. The modulation format is simple (BPSK or QPSK); this facilitates high-rate operation. The spatially multiplexed channels are separated at the receiver using broadband...
We report first experimental results from a hardware prototype of a millimeter wave line-of-sight (LOS) 2times2 MIMO link. The proposed architecture uses antenna element spacing derived from the principles of diffraction limited optics to establish multiple parallel data channels. Operation at millimeter wave carrier frequencies reduces the antenna array size to reasonable dimensions. The proposed...
This paper presents a support function for MPI derived datatypes on DIMMnet-3 network interface with multi-banked extended memory, which is under development. Semi-hardwired derived datatype communication based on RDMA with hardwired gather and scatter is proposed. This mechanism and MPI using it are implemented and validated on DIMMnet-2 which is a former prototype operating on DDR DIMM slot. The...
This paper presents recent experimental results from a novel hardware prototype of an outdoor millimeter-wave line-of-sight (LOS) MIMO link. The system architecture establishes multiple parallel data channels using antenna element spacing derived from the principles of diffraction-limited optics. A millimeter-wave carrier frequency reduces the antenna array size to reasonably compact dimensions. In...
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