This automatic gain control circuit is provided with a variable gain amplifier for amplifying a received signal, has a small circuit size, and makes it possible to reduce the effect of superimposed external noise input within the frequency bandwidth of a received signal. The automatic gain control circuit supplies the output of the variable gain amplifier to an analog/digital converter and comprises: a frequency selection circuit that is connected to the output of the analog/digital converter and that selects a signal within the frequency bandwidth of a received signal, said signal having a narrower bandwidth than the frequency bandwidth; and a control signal generation circuit that generates a control signal for the variable gain amplifier on the basis of the strength of the signal selected by the frequency selection circuit.

A site safety system comprising an onsite command center server including a command center processor coupled to a command center system bus, a command center memory coupled to the command center system bus, the command center memory being a non-transitory machine-readable storage medium configured to store instructions for execution by the command center processor, and a command center communication interface coupled to the command center system bus, a first sensor and a second sensor spaced from one another and communicatively connected to the onsite command center server, and a multi-mode data logger communicatively connected to the onsite command center server.

Disclosed is a method and apparatus for exploiting Radio Access Technology (RAT) system information blocks for global navigation satellite system (GNSS) positioning. The method may include processing, by a mobile device with carrier aggregation, a voice call via a first RAT, the processing of the voice call causing second RAT capabilities of the mobile device to go out of service. The method may also include accessing a communications network using the second RAT with an available receiver of the mobile device during the voice call via the first RAT. The method may also include obtaining, with the available receiver, timing information from one or more broadcast system information blocks of the second RAT, and determining a time based, at least in part, on the obtained timing information.

A subscriber unit, including an antenna array and an antenna array interface coupled to the antenna array, is described. Wireless transmissions, at least two of which are based on different directional transmissions from a transmitter, are received at the antenna array. Feedback messages are generated using the antenna array interface. The feedback messages are communicated using the antenna array to adjust settings of the transmitter.

A fixed communication network is disclosed in which a plurality of transmitters feed signals via tributary transmission lines of different lengths onto a shared network component. A timing reference signal is distributed to the transmitters. The shared network component in some embodiments takes the form of a transmission line. In order to enable the sharing of the capacity of the shared network component, each of the plurality of transmitters codes data for transmission in accordance with a code division multiple access scheme. The efficiency of usage of the shared network component is improved by synchronizing the arrival of the encoded bits at the shared network component. This is achieved by populating a store within each transmitter with a pre-set timing offset, and timing the transmission of data in accordance with the timing reference signal received by the transmitters and the pre-set timing offset.

A method for transmitting feedback information via a Spatial Rank Index (SRI) channel includes determining, at an access terminal, a value of a spatial rank index and transmitting, from the access terminal through the SRI channel, feedback information indicating the determined value of the spatial rank index according to a prescribed coding. The codeword of the prescribed coding is one of: (0,0,0,0,0,0,0,0), (1,0,1,0,1,1,0,1), (0,1,1,1,0,0,1,1), or (1,1,0,1,1,1,1,0).

A user equipment (UE) may camp on a network following a SIM bootup. Specifically, the UE may determine that a SIM implementation module of the UE includes a first SIM application (e.g., USIM) associated with a first cellular radio access technology (RAT) (e.g., LTE) and a second SIM application (e.g., CSIM) associated with a second cellular RAT (e.g., CDMA). The UE may then initialize the first SIM application and the second SIM application. The UE may determine whether the network is configured to support both voice and data communications using the first cellular RAT. If so, the UE may initiate camping on the network with the first cellular RAT in response to determining that the first SIM application is ready, but before the second SIM application is ready. If not, the UE may wait until both the first and second SIM applications are ready before initiating camping on the network.

A communication system with increased throughput for providing communication between transceivers via a wireless communication channel through multiple, N, single input, single output, SISO, links provided for a corresponding number, N, of data sequences, wherein each transceiver includes a transmitter having spreading units each configured to spread in an operation mode of the communication system a data sequence with an associated predefined unique spreading code sequence to generate a spread data sequence multiplexed to an antenna unit of the respective transceiver configured to transmit the spread data sequences via the wireless communication channel to antenna units of other transceivers of the communication system.

In certain embodiments, a method includes, by a first mobile device, obtaining a data packet and determining, from a first set of resources, control resources for transmitting scheduling information associated with the data packet. The control resources include a physical sidelink control channel (PSCCH). The method includes determining, by the first mobile device from a second set of resources, acknowledgement (ACK)/negative acknowledgement (NACK) resources associated with the data packet and related to the control resources. The scheduling information includes transmission information for transmitting the data packet and an indication of the ACK/NACK resources. The method includes transmitting, by the first mobile device to a second mobile device, the scheduling information on the control resources and the data packet on a set of resources indicated by the transmission information and listening, by the first mobile device, for an ACK/NACK transmitted by the second mobile device on the ACK/NACK resources.

Systems, methods, apparatuses, and computer program products relating to phase tracking reference signal (PT-RS) design, for example, for discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM), are provided. One method may include forming, by a network node, a phase tracking reference signal (PT-RS) sample sequence using outer-most constellation points corresponding to scheduled modulation order of data channel, and scrambling the phase tracking reference signal (PT-RS) sample sequence with a user equipment-specific sequence.