3results about How to "Achieve seamless coverage" patented technology

The utility model discloses a novel pumpkin piece suitable for plate furniture connection, including pumpkin suite main part, the outer surface of pumpkin suite main part has the height difference step, the outer surface of pumpkin suite main part is equipped with eccentric wheel accommodation chamber, the inside of eccentric wheel accommodation chamber is equipped with eccentric wheel module, the outer surface of pumpkin suite main part is equipped with the decoration cover module. The cooperation of this device through eccentric wheel accommodation chamber and eccentric wheel module, utilize the built -in limit card slot of eccentric wheel accommodation chamber, make eccentric wheel module pass through hexagonal hole rotation locking, will traditional exposed eccentric wheel completely hide in the cavity, can effectively avoid the problem of oxidation and corrosion, at the same time through trapezoidal installation groove cover beautification cover plate, improve the overall aesthetic, the decoration cover main part of the equipment is fixed through the connecting clamping block and the clamping slot of pumpkin suite main body quickly, can effectively solve the problem that traditional three in one connecting piece is exposed big, influence furniture appearance.

The utility model discloses a 0.5-6GHz frequency conversion assembly which is composed of a first frequency conversion assembly, a second frequency conversion assembly, a local oscillator assembly and a clock switching assembly. The first frequency conversion assembly and the second frequency conversion assembly are respectively composed of a detection channel and a 0.5 G-6G output channel. The 0.5-6GHz output channel is formed by connecting a 6G low-pass filter, a first switch group, a first low-noise amplifier, a temperature compensation attenuator, a first program controller, a second low-noise amplifier, a first power divider, a first frequency mixer, a 14 + / -0.25 G filter, a third low-noise amplifier, a second frequency mixer, a 6G low-pass filter, an amplifier, a second program controller and an output switch group in series; the detection channel outputs a detection frequency after a DLVA module is connected in series with one end of a power divider; the local oscillator assembly provides a local oscillator source. According to the utility model, flexible frequency conversion and processing of signals within the frequency range of 0.5-6GHz are realized, and the multi-functional and high-performance signal processing capability is realized, so that the requirements of various communication, radar and other systems on processing of signals with different frequencies can be met.

This invention relates to the field of satellite navigation and wireless communication technology, and discloses an indoor positioning method and system based on feeder-multiplexed BeiDou dual-frequency signals. The method involves receiving outdoor B1I and B2a signals via a high-gain BeiDou dual-frequency receiving antenna. Frequency separation and signal conditioning are performed using a dual-frequency separation filter. The B1I signal is then transmitted to an indoor distributed antenna for broadcasting via an existing communication feeder network, while the B2a signal is transmitted to a central directional antenna to establish a time synchronization reference. A mobile terminal receives the dual-frequency signals, performs acquisition and tracking through digital signal processing, and extracts pseudorange and carrier phase observations. Observation data from the same antenna are paired, the pseudorange difference between the two frequencies is calculated, and system errors are eliminated. Weighted least squares and Kalman filtering are used for position calculation. This invention solves the problem that traditional GPS signals cannot cover indoor environments and has promising application prospects in scenarios such as underground commercial complexes, tunnels, and parking lots.