摘要:
In summary, the invention relates to a device, a system, a method and a computer program for spectrum sensing. A detection procedure for detecting a signal of interest or an event by using a plurality of sensing devices capable of communicating with a central unit is proposed. The sensing devices can compute soft detection metrics and communicate this information to a central unit, where the information may be used to make a final detection decision using a certain specified rule. The signaling overhead of the proposed approach can be of the same order as that of a hard signaling approach. However, the proposed approach may achieve a better detection performance.
摘要:
A method, configuration unit (100), and control unit (160) for configuring a lighting system (101) with respect to light other than light emitted from an illumination device (103) are provided. The lighting system comprises the at least one illumination device arranged in an illumination plane (104) to illuminate a workspace plane (110). The method comprises the step of obtaining a first contribution of the light other than the light emitted from the illumination device at a first location (113) in the illumination plane based on a first signal representative of a total light intensity measured at the first location. Furthermore, the method comprises the step of obtaining a second contribution of the light other than the light emitted from the illumination device at a second location (121) in the workspace plane based on a second signal representative of a total light intensity measured at the second location. Moreover, the method comprises the step of determining a transfer function (130) representative of the relationship between the first and the second contributions of the light other than the light emitted from the illumination device.
摘要:
In summary, the invention relates to a device, a system, a method and a computer program for spectrum sensing. A detection procedure for detecting a signal of interest or an event by using a plurality of sensing devices capable of communicating with a central unit is proposed. The sensing devices can compute soft detection metrics and communicate this information to a central unit, where the information may be used to make a final detection decision using a certain specified rule. The signaling overhead of the proposed approach can be of the same order as that of a hard signaling approach. However, the proposed approach may achieve a better detection performance.
摘要:
The invention relates to an operational state determination apparatus (1) for determining whether a variation in a determined electrical parameter of an electrical network (2) is caused by a variation in an operational state of an electrical consumer of the electrical network. The electrical network comprises multiple electrical consumers (3, 4, 5) and a voltage source (6), wherein a variation classification unit (10) determines whether a variation in the determined electrical parameter of the electrical network is caused by a variation in the operational state of an electrical consumer of the network depending on a decision variable which depends on a variation in a measured voltage and a variation in a measured current of the electrical network. This determination can be performed, without directly using the variation in the determined electrical parameter of the electrical network and is therefore less influenced by random voltage fluctuations in the electrical network.
摘要:
A method of synchronizing transmission of signals between two nodes in a network that includes at least another cooperating node. After reception of a clear-to-code signal (CTC) from the one node (B), broadcasting a clear-to-send signal (CTS), which contains at least a timing indication, from the cooperating node (C) to the first node (A) and the second node (B). After reception of the clear-to-send signal (CTS) by the first and second nodes (A,B), a first signal (S1) and a second signal (S2) are transmitted, via the cooperating node (C), respectively from the first node (A) to the second node (B) and from the second node (B) to the first node (A) during at least a common time period depending on the timing indication.
摘要:
Method for transmitting data from a resource-constrained transmitter to a receiver in a wireless network, comprising the following steps:—the resource-constrained transmitter (21a, 21b, 21c) sending a channel request message to the receiver,—in response to the request, the receiver (22) determining communication channel availability based on the result of a sensing step and broadcasting channel information,—the resource-constrained transmitter (21a, 21b, 21c) listening to the information and transmitting data on the corresponding channel, wherein the sensing step is performed by the receiver before or after receiving channel request from the transmitter. The invention also relates to a wireless network.
摘要:
A control unit (9) for controlling luminance in a space (3), wherein the control unit is configured to estimate a three-dimensional location of at least one target (8) as a function of time, and control the luminance in the space based on the estimated three-dimensional location of the at least one target.
摘要:
A control unit (9) for controlling luminance in a space (3), wherein the control unit is configured to estimate a three-dimensional location of at least one target (8) as a function of time, and control the luminance in the space based on the estimated three-dimensional location of the at least one target.
摘要:
The invention is based on the idea that a lighting system can utilize its sensing and control functionalities to offer dynamic load management (e.g. demand response) services in an electrical grid. The present invention optimizes dimming levels of lighting sources of a lighting system by determining a solution for an optimization problem directed to determining new dimming levels such that power consumption of the lighting devices is reduced. During the determining the solution for the optimization problem, the present invention may take into account specific guarantees on illumination rendering, acceptable to different users, and differing illumination requirements in different spaces or rooms. By the lighting control of the present invention, predictable and effective load reductions may be achieved.
摘要:
The present invention relates to a method of synchronising transmission of signals between two nodes in a network comprising at least another cooperating node. The invention consists in, after reception of a clear-to-code signal (CTC) from the one node (B), broadcasting (105) a clear-to-send signal (CTS), which contains at least a timing indication, from the cooperating node (C) to the first node (A) and the second node (B). After reception of the clear-to-send signal (CTS) by the first and second nodes (A, B), a first signal (S1) and a second signal (S2) are transmitted (107), via the cooperating node (C), respectively from the first node (A) to the second node (B) and from the second node (B) to the first node (A) during at least a common time period depending on the timing indication.