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In the next generation Ka-band telemetry, track, and command (TT&C) system, the received TT&C signal will suffer from more than 800 kHz of Doppler shift. Even with code phase-Doppler parallel search algorithm based on FFT, the mean acquisition time (MAT) will be more than several seconds. By exploiting the Doppler tolerance of chirp noise waveform (CNW), the authors propose a novel CNW aided...
Technical innovation drives the low power consumption requirements in ASIC design. This paper presents a SD card controller, in which two asynchronous units (BIU and CIU) are included for lower power structure. Adding low power mode to finite state machine makes this controller to shut down if no data or command is transferring for a long time. Only one FIFO is used to store temporary data in order...
Exascale computing systems are soon to emerge, which will pose great challenges on the huge gap between computing and I/O performance. Many large-scale scientific applications play an important role in our daily life. The huge amounts of data generated by such applications require highly parallel and efficient I/O management policies. In this paper, we adopt a mission-critical scientific application,...
Recently, there has been a growing interest in monitoring aqueous environments using Underwater Acoustic Sensor Networks (UASNs). In these networks, the Medium Access Control (MAC) protocols are responsible for coordinating the access from active nodes into the acoustic channel, which is characterized by high propagation delay and low data rate, which is challenging for system synchronization, energy...
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