摘要:
An open-loop fast link adaptation scheme is proposed in an OFDM system. An access point first transmits a downlink packet comprising an open-loop link metric to a wireless station. The open-loop link metric contains a transmit power of the downlink packet plus a receiver sensitivity of the access point. The wireless station measures a received signal strength indication (RSSI) value of the downlink packet. The wireless station then applies open-loop link adaptation and determines a modulation and coding scheme (MCS) based on the open-loop link metric and the RSSI value. The open-loop link adaptation scheme is especially suitable for smart meter/sensor networks as it reduces overhead and increases link capacity.
摘要:
Systems and methods are described for efficiently meeting the needs of property buyers, sellers, and agents. Attributes of the user and of each property are combined and processed by a machine learning model. The output represents a prediction that a user will choose to view the property. Each property is ranked and displayed to the user. When the user selects a property, the interaction is used to update the machine learning model. In some cases, a natural language processing system identifies property and user attributes based on a natural language query. In some cases, a chatbot may respond to a natural language query in real time. The system may also be utilized to provide matching services for buyers or sellers to agents, or third party service providers, as well as matching buyers and sellers directly to each other, or user to other users for transaction, interaction and other needs.
摘要:
A gate bias circuit for a plurality of GaAs amplifier stages is a transistor coupled to a temperature compensation current received from a CMOS control stage. A plurality of pHEMPT amplifier stages are coupled to the gate bias circuit and to a control voltage which switches the amplifier stage. A selectively controlled stage pass transistor enables a current mirror between the gate bias circuit and each stage amplifying transistor. The penultimate pHEMPT amplifier stage is coupled to a CMOS amplifier. A CMOS circuit provides both the temperature compensation current by a proportional to absolute temperature (PTAT) circuit and the control voltage enabling each pHEMPT transistor to receive its input signal in combination with the gate bias voltage.
摘要:
An array antenna system consists of layered construct of subarrays. Each beam pointing angle requires an antenna weight vector (AWV). A circuit tracks the changing orientation of a beam within a much larger virtual array of antenna weights. A row or column of a local RAM may be determined to be least likely to be read next and is overwritten with antenna weights more likely to be read next. An address translation circuit represents the RAM as a barrel. An adaptively adjusted antenna weight method optimizes received signal power. A beam splitting method provides a mirror beam pointing direction by wrapping around a look ahead table of antenna weight vectors when an antenna is itself gyrating or when a remote transceiver is anticipated to transit the horizon.
摘要:
Systems and methods are described for efficiently meeting the needs of property buyers, sellers, and agents. Attributes of the user and of each property are combined and processed by a machine learning model. The output represents a prediction that a user will choose to view the property. Each property is ranked and displayed to the user. When the user selects a property, the interaction is used to update the machine learning model. in some cases, a natural language processing system identifies property and user attributes based on a natural language query. In some cases, a chatbot may respond to a natural language query in real time. The system may also be utilized to provide matching services for buyers or sellers to agents, or third party service providers, as well as matching buyers and sellers directly to each other, or user to other users for transaction, interaction and other needs.
摘要:
A method of operation for a hierarchically elaborated phased-array antenna. Within a plurality of front end modules a phased-array processing die individually transforms phase and gain according to a register array. The register array in each RFIC is grouped into a local register group and a global register group, the local registers physically placed close in proximity to RF chains which each correspond to an element of array antenna, whereby each set of local registers control an individual antenna element and a global register controlling overall RFIC function. The method efficiently elaborates phase shift weights into a submodule of a phase array antenna system. Within each subarray phase control submodule the method recursively elaborates weights to control phase shifters. The method receives and transforms pairs of major operators and minor operators. The method distributes to each submodule determining its own base phase shift weight per its unique configuration.
摘要:
An array antenna system consists of layered construct of subarrays. Each beam pointing angle requires an antenna weight vector (AWV). A circuit tracks the changing orientation of a beam within a much larger virtual array of antenna weights. A row or column of a local RAM may be determined to be least likely to be read next and is overwritten with antenna weights more likely to be read next. An address translation circuit represents the RAM as a barrel. An adaptively adjusted antenna weight method optimizes received signal power. A beam splitting method provides a mirror beam pointing direction by wrapping around a look ahead table of antenna weight vectors when an antenna is itself gyrating or when a remote transceiver is anticipated to transit the horizon.
摘要:
A database for a set of orientation-matched road (OMR) sections is searched according to a calculated orientation of an object and orientations of road sections stored in the database. The OMR sections are searched for a position-matched road (PMR) set according to a calculated position of the object and positions of the OMR sections. The PMR set includes one or more PMR sections. The object is located using the PMR set.
摘要:
The present invention relates to systems (100) and methods used in marketing goods and services. The system includes a call router (124) which determines how a dialler (116) routes outbound calls to sales consultants, based on the output of a consultants skills model (122). The controller (118) also includes a lead sorting component (126) which performs propensity based sorting of sales leads based on the output of a sales propensity model (120). The output of the propensity sorting component is provided to the dialler (116) to control the ordering of the dialling of customers.
摘要:
A vehicle safety system includes a vehicle having a vehicle cabin; a reminder placard mounted to the vehicle; an air sensor mounted to the vehicle, an alcohol indicator light activated by the air sensor when alcohol is detected in the cabin; a forwardly extending telescopic mirror mounted on an extension arm used for allowing a driver to see around a blind turn at an intersection; and a convex mirror mounted to an exterior portion of the vehicle to allow a user to see downward for ease of parking. The air sensor senses the presence of alcohol in the cabin. The vehicle safety system optionally includes an extension arm formed as a flexible leafspring arm connecting the telescopic mirror to the vehicle.