31 results about "Coherent information" patented technology

Method and apparatus for extracting coherent information from in-phase (I) and quadrature (Q) signals. In a form, signals from an antenna array are mixed to form a plurality of I and Q signals that combined to form respective complex vectors. Each vector is adjusted in phase and magnitude to compensate for variations in field signal patterns, summed with other vectors, spatially and temporally filtered, and processed using spectral analysis algorithms to extract coherent spatial information. The coherent spatial information may be used to detect the presence, number and activity of insects within a structure in the near field of the antenna.

The invention discloses an adaptive high-precision interferometric SAR phase estimation method, which combines Wiener filter theory to construct an optimal weighted vector, and obtains signal subspace and noise subspace by eigendecomposing the optimal covariance matrix formed by it , make full use of the coherence information of the corresponding pixel pair and its adjacent pixels, and construct the spatial spectral function according to the orthogonality of the signal subspace and the noise subspace in the MUSIC algorithm, and accurately estimate the interference phase between corresponding pixels through spectral peak search. It does not need to determine the magnitude and direction of the registration error to obtain the optimal weight, but only uses the Wiener filter to obtain the optimal weight, thus solving the problem of large amount of computation in traditional InSAR interferometric phase estimation. The invention is applicable to the fields of accurate inversion of surface parameters of InSAR complex scenes and the like.

This invention relates to a message send / receive method realizing routing and bridge-connecting functions under an internet protocol setting bridge-connection module and bridge-connection port on a router to set up a common Ethernet address and IP address for it. When receiving message via bridge-connection port, the message is transferred to the bridge-connmection or IP module for sending or discarding. When sending the message, the related information on the router of sending message is compared with coherent information in the message or duplicated to be sent by the bridge-connection module. This invention method enables inter-bridge connection access in bridge-connection network, and inter-communication of IP protocols with non bridge-connection network.

The invention discloses a method and a device for regulating signals, which are capable of increasing the locating accuracy by increasing the stripping degree of carrier waves and spreading codes in the signals. The method comprises the steps of obtaining frequency mixing signals by carrying out frequency mixing on signals which are currently received and signals which are locally recurrent, obtaining coherent information according to the frequency mixing signals and the spreading codes which are locally generated, processing the coherent information, obtaining a processing result, regulating signals which are locally generated by adopting the processing result, and stripping the carrier waves and the spreading codes in the signals which are received at the next moment from each other by adopting the signals which are regulated. According to the method and the device, disclosed by the embodiment of the invention, the carrier waves and the instantaneous codes which are locally generated can be respectively consistent with receiving carrier waves and receiving codes, and thus the stripping degree of the carrier waves and the spreading codes in the signals which are received at the next moment can be increased.