4 results about "Diversity combining" patented technology

The application provides a radio interference source automatic positioning and troubleshooting system and method thereof, the radio interference source automatic positioning and troubleshooting system comprises a front-end hardware enhancement module, a core algorithm optimization module and a system-level cooperative positioning module, the radio interference source automatic positioning and troubleshooting method comprises hardware deployment and preprocessing, spatial domain beamforming and subarray combination, digital domain multipath elimination and signal recovery and the like, the radio interference source automatic positioning and troubleshooting system and method thereof provided by the application effectively solve the problem that the traditional equipment cannot distinguish the direct wave from the reflected wave, so that the direction finding result is seriously deviated or even points to the wrong direction, and greatly improve the accuracy and reliability of the direct wave identification of the signal.

This invention relates to the field of power line carrier communication technology, and discloses an HPLC signal decoding method, apparatus, and communication device based on a dual-mode system. The method includes: acquiring a frame signal composed of multiple physical blocks; determining multiple log-likelihood ratios corresponding to each copy of data in the target physical block; performing set-and-sort processing on the log-likelihood ratios corresponding to each bit in the multiple copy data based on a first buffer module to obtain the target log-likelihood ratio for each bit in the target physical block, wherein the multiple buffer modules include a first buffer module with a first bit width and at least one second buffer module with a second bit width, the first bit width being greater than the second bit width; storing the target log-likelihood ratio in the target buffer module; and if the target buffer module is one of at least one second buffer module, then performing decoding processing on the target physical block based on the target buffer module. This invention can reduce the area occupied by the buffer module, reduce power consumption, and reduce design complexity.

The application discloses a power special network communication system and a signal processing method based on FFH / SCMA. The system combines fast frequency hopping (FFH) and sparse code division multiple access (SCMA), and a sending end maps user symbols onto multiple SCMA subcarriers through fast frequency hopping to form a fast frequency hopping SCMA code word; a receiving end recovers data through frequency hopping, decoding, sub-set combining and maximum likelihood estimation. The signal processing procedure comprises SCMA encoding mapping, frequency hopping, decoding according to frequency hopping pulses, and multi-copy sub-set combining. Compared with the defect that the conventional SCMA fixed subcarrier transmission is vulnerable to electromagnetic interference, the application significantly improves reliability through frequency sub-set combining, and meets the high-reliability communication access requirement of a new power distribution system.

This invention relates to a BeiDou and mobile communication fusion positioning system based on frequency division mixing (FDM), belonging to the field of BeiDou positioning and mobile communication fusion technology. The system includes a BeiDou multi-channel signal generation unit, a signal combining unit, a mobile communication transmission unit, and a BeiDou signal conversion unit, with each unit operating sequentially. The BeiDou multi-channel signal generation unit generates BeiDou frequency domain diversity combined signals or BeiDou time-division frequency domain diversity signals based on the frequency division isolation principle. The signal combining unit preprocesses and combines or directly transmits the signals. The mobile communication transmission unit enables the shared network transmission of BeiDou signals and mobile communication signals. The BeiDou signal conversion unit generates BeiDou positioning signals through filtering, mixing, and other processing. This invention relies on the core technology of frequency division mixing to enable BeiDou signals to share the transmission network with existing indoor communication distribution systems, adapting to enclosed scenarios such as parking lots, utility tunnels, and underground tunnels. It features a simple structure, strong coordination, and allows for seamless terminal access for positioning and navigation.