50 results about "Transceiver design" patented technology

A method and apparatus for transmitting data in a MIMO communication system, the method including encoding at least one data symbol by implementing a first precoding scheme, the first preceding scheme including a precoder derived from a first channel state information (CSI). The method further includes selecting at least one antenna that maximizes the first CSI, the at least one antenna being selected by implementing a first selection scheme, and transmitting the at least one data symbol via the at least one antenna.

Offender presence warning system comprises;

a tracking device securely attached to an offender limb, containing a GPS receiver and a wireless modem or an RF transceiver designed to transmit at time interval RF signal. And a victim carry on RF transceiver device which is designed to receive offender tracking device transmitted signals when the offender is located within near proximity of a victim. The victim device in response to received RF transmitted signals from the tracking device, generates warning signal(s) to alert the victim the presence of an offender, and automatically transmits a RF signal(s) to the offender tracking device, which upon receipt of the RF signal generates alarm signal to warn the offender being too close to the victim, If the offender becomes non responsive, the offender tracking device transmits a signal to a monitoring station containing information to both the offender, and the victim unit ID along with GPS location information.

The invention discloses a processing method of MIMO-OFDM system downlink information data. The problem that the optimum error rate performance cannot be obtained through a traditional downlink information data processing method is mainly solved. The processing method comprises the steps that (1) sub-carriers are subjected to grouping, and sending and receiving signal vectors corresponding to the groups of sub-carries and channel matrixes are established; (2) modulating signals corresponding to the groups of sub-carries are subjected to normalization and disturbance; (3) the signal vectors after normalization and disturbance are subjected to multithread interference rejection and emitting power control; (4) the receiving signal vectors corresponding to the groups of sub-carriers are subjected to gain compensation and modulus operation; (5) normalization modulating signal estimated values obtained after modulus operation are subjected to inverse normalization; and (6) estimated values of orthogonality amplitude modulating signal vectors after inverse normalization are subjected to demodulation. The method has the advantages of being low in error rate and adjustable in complexity, and the method is used for transceiver designing of an MIMO-OFDM communication system.

A system is provided for optimizing throughput in a communication system. During operation, the system receives, at a first antenna, estimated channel state information (CSI) at least one channel between the first antenna and at least one second antenna. The system obtains antenna correlation information associated with the first antenna and the second antenna, respectively. The system further calculates a set of noise terms associated with random noise for the at least one channel, and optimizes a configuration of beamformers for the first antenna and the at least one second antenna that maximizes a throughput of all antennas, in accordance with the estimated CSI, the obtained antenna correlation information, and the noise terms.

The invention discloses a multi-user transceiver design method in a visible light MIMO system, and belongs to technical field of visible light communication. On the condition that the transmitting light power is limited, the problem that in the multi-user MIMO-VLC system, users intervene mutually exists, joint optimization is conducted on a transmitting precoding matrix and a receiving balancing matrix, and therefore the signal leakage-to-noise ratio of the system can be maximum. Transmitting precoding is conducted on a transmitter to reduce the channel correlation, and then receiving balancing is conducted on a receiver to restore transmitted data. Compared with the prior art, precoding of the transmitter and receiving balancing of the receiver are comprehensively designed, and the maximum signal leakage-to-noise ratio criterion-based transceiver design method for signal transmission on the condition that the light power is limited is proposed.

The invention provides a multi-input multi-output transceiver design method and device, and the method comprises the steps: building a target optimization model based on a safety rate model of a user signal in a signal transmission system; solving the target optimization model, and determining optimization design parameters of the transceiver in the signal transmission system; the optimization design parameters comprise at least one of a downlink precoding vector, a downlink artificial noise vector, uplink sending power and a mode selection vector; the security rate model is determined based on signal security rates of all users associated with the eavesdropping device. According to the multi-input multi-output transceiver design method and device provided by the invention, the target optimization model is constructed and solved, so that the optimization design parameters of the transceiver are obtained, interception of signals by eavesdropping equipment can be effectively prevented, and the communication security of a signal transmission system is ensured.

An apparatus and corresponding method for enabling the use of a plurality of control heads for operating a transceiver designed to operate with a single control head via a data bus. An interface module is connected between the transceiver and the plurality of control heads that periodically generate an interrupt request. The interface module, responsive to the interrupt requests, selectively enables one of the control heads to operate the radio transceiver. The method includes polling communication from the control heads and transceiver for mediating control of the transceiver. In one embodiment, accessibility of the radio system is improved and cost reduced by utilizing the speaker and volume control of each control head, such that an external speaker is not required.

The invention relates to a robust hybrid transceiver design method based on millimeter wave full duplex relay communication, and belongs to the technical field of communication. The method comprises the following steps of: designing an interference elimination matrix at a relay end by utilizing the null space property of a self-interference channel; and then, using the capacity lower bound of a channel as an optimization problem, solving an all-digital precoder by a water injection algorithm, and integrating an interference elimination matrix into an all-digital precoder at the relay end; andfinally, decomposing the all-digital transceiver into a hybrid transceiver by using an iterative decomposition method with a closed-form solution.

The invention provides a block diagonalization assisted robust transceiver design method in a multi-cell MIMO system. The method comprises the following steps: step 1: setting an operation mode of the multi-cell MIMO system; step 2: defining a signal to interference plus noise ratio (SINR) of a single user or receiver, and calculating the signal to interference plus noise ratio of the k user or receiver; step 3: performing block diagonalization precoding by each transmitter according to a local estimation channel; step 4: calculating a lower bound value of the signal to interference plus noise ratio when the channel has a bounded error; step 5: using the lower bound value of the signal to interference plus noise ratio as the signal to interference plus noise ratio of the worst case, importing a slack variable, and transforming to solve a beam forming vector problem of the transmitters or receivers by using a convex optimization method; and step 6: obtaining a robust beam forming vector by using an alternate optimization method. According to the block diagonalization assisted robust transceiver design method provided by the invention, the robustness for the bounded error is relatively high, and each transmitter only uses the local CSI to perform the block diagonalization precoding, thereby reducing the feedback cost and guaranteeing the minimum SINR performance.

The invention belongs to the technical field of information and communication, and relates to an F-OFDM system transceiver design method based on amplitude limiting of compressed sensing. In order tomore effectively reduce PAPR and fully utilize known information to recover a truncated part z so as to more accurately recover a signal, the present invention proposes repeating Clipping_Filling andusing a Turbo-CS algorithm to recover a missing signal in a time domain. On the one hand, through repeated Clipping_Filling, PAPP is reduced. On the other hand, a receiving end uses a Turbo-QSoppy (using the TCP-Composite) algorithm to iteratively detect an interference signal, thereby ensuring reliability of transmission.

A communication control device and a transceiver for a user station of a serial bus system and a method for communicating in a serial bus system. The communication control device includes a communication control module for generating a transmission signal for controlling a communication of the user station with another user station of the bus system, in which bus system at least one first communication phase and one second communication phase being used for exchanging messages between user stations of the bus system, a first terminal for transmitting the transmission signal to a transceiver designed to transmit the transmission signal onto a bus, a second terminal for receiving a digital reception signal from the transceiver, a bidirectional terminal, and an operating mode switching module for switching the transmission direction of the bidirectional terminal as a function of the operating mode of the transceiver in the second communication phase.

According to a first aspect of the present disclosed subject matter, a system for managing inductive charging of at least one device, the system comprising: at least one venue comprising: a plurality of charging spots each of which comprises a dedicated Bluetooth low energy (BLE) transceiver designed to enable communication between charging spots of the plurality of charging spots, wherein at least one charging spot of the plurality of charging spots is capable of being configured as a relay; at least one gateway comprising a BLE transceiver; wherein the gateway is capable of communicating, by its BLE transceiver, with each charging spot either directly or indirectly via the relay; and a cloud computing server configured to provide services to the at least one venue; and wherein the CCS is connected with at least one venue via the Internet.

A communication control device and a transceiver for a user station of a serial bus system. The communication control device includes a communication control module for generating a transmission signal for controlling a communication of the user station with at least one other user station of the bus system, in which bus system a first communication phase and a second communication phase being used for exchanging messages between user stations of the bus system, an STB terminal for transmitting an operating mode signaling signal to a transceiver designed to transmit the transmission signal onto a bus of the bus system, and an operating mode coding block for generating the operating mode signaling signal from a signal that signals to the transceiver that the transceiver is to be switched into the standby operating mode.

Techniques are provided for full-duplex mobile wireless transceiver design without using duplexers. In an embodiment, separate antennas are provided for the TX and RX signal paths in the transceiver. In an embodiment, the antennas may be implemented as surface mountable ceramic antennas. In an embodiment, the antennas may incorporate integrated band-pass filtering. Further techniques for designing the antennas to have different relative physical characteristics, including antenna orientation, are disclosed.