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We study distributed Kalman filtering over the wireless sensor network, where each sensor node is required to locally estimate the state of a discrete-time linear time-invariant system, using its own observations and those transmitted from its neighbors in the presence of data packet drops. This is an optimal one-step prediction problem under the framework of distributed estimation, assuming the TCP...
The higher order constellation scheme, i.e., 128AP-SK, has been adopted in the latest generation satellite digital video broadcasting (DVB-S2X) standard. It significantly improves the spectral efficiency, but also introduces serious complexity problems in the implementation of the demapper. This paper presents an efficient soft demapper for 128APSK of DVB-S2X based on the concept of decision region...
Full information (FI) control for output regulation based on the internal model principle requires that the state vectors of the plant and reference models be available for both feed-forward and feedback controllers. However in practice neither of the state vectors is available, and often only the tracking error between the plant output and reference trajectory can be measured. This gives rise to...
Wrist-worn wearable fitness devices, such as FitBit and Apple Watch, have become popular in recent years. Runners can use the GPS embedded in these wearable devices to log the route taken during their exercise, providing vital feedback on pace and distance traveled. Unfortunately, continuous polling for GPS data results in a significant adverse impact on device battery life, e.g., many flagship wearables...
Recently, Chi and Chen et al. proposed a subcarrier averaging based blind beamforming framework for a multiuser orthogonal frequency division multiplexing (OFDM) system, which can work well in block fading channels and achieve full multipath diversity gain by maximal ratio combining. However, when the channel is not static in an OFDM block or the frequency synchronization is not accurate, the basic...
This paper discusses the torque estimation of the spring which is internally connected between the motor shaft and the plate in an electronic throttle valve. In advanced engine control (such as EGR rate control), the throttle valve may need to be controlled in both opening and closing directions using a bidirectional driver in order to achieve more accurate and faster transient performance. The spring...
A pilot-aided scheme for the parameter estimation in Paired Carrier Multiple Access (PCMA) satellite communication systems is proposed in this paper. Recently, the asymmetric application mode of PCMA, which is more efficient and pragmatic than the symmetric mode, has been studied with great interest. In our research, carefully selected pilot sequences have been inserted into the frame in an attempt...
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