Abstract: A user client device with a single receive (RX) chain, a first antenna and a second antenna, and a processor that causes the user client device to couple the single RX chain to the first antenna to receive a first data packet on a first channel and determine a first channel state information (CSI) tile of the first channel based on one or more fields in the first data packet, decouple the first antenna from the single RX chain and couple the second antenna to the single RX chain to continue receiving the first data packet on a second channel, determine a second CSI tile of the second channel based on one or more of a portion of the first plurality of fields, aggregate the first CSI tile with the second CSI tile, and generate a CSI matrix based on aggregating the first CSI tile with the second CSI tile.

Abstract: Systems, methods, and devices select antennas to enhance the range and throughput of wireless communications devices. Methods include identifying a plurality of combinations of antennas based on a plurality of available antennas for a wireless communications device, and generating, using a processing device included in a multiple-input-multiple-output (MIMO) device, a plurality of quality metrics including at least one quality metric for each of the identified combinations of antennas, where each of the at least one quality metrics represents a signal quality of a signal associated with each of the plurality of antennas, and wherein the signal is a spatial stream. Methods further include selecting at least two antennas from the plurality of combinations of antennas based, at least in part, on the plurality of quality metrics, where the at least two antennas are selected for use by the wireless communications device during a transmitting or receiving operation.

Abstract: A receiving apparatus includes: a first pulse noise determining circuit configured to determine the presence or the absence of pulse noise in the receiving signal based on a first threshold; a first pulse noise removing circuit configured to remove pulse noise in the receiving signal based on the result of the determination made by the first pulse noise determining circuit; a bandwidth limiting filter configured to limit a receiving signal whose pulse noise has been removed by the first pulse noise removing circuit to a predetermined bandwidth; a second pulse noise determining circuit configured to determine the presence or the absence of pulse noise in the receiving signal whose bandwidth has been limited by the bandwidth limiting filter based on a second threshold; and a threshold control circuit configured to adjust a first threshold based on the result of the determination made by the second pulse noise determining circuit.

Abstract: The present disclosure relates to a 5G or pre-5G communication system that will be provided to support higher data transfer rate following a 4G communication system such as LTE. The present disclosure relates to a method of performing random access of a terminal, said method comprising: an operation of determining the number of received beams of a base station connected to transmitted beams of the terminal; an operation of determining an area of wireless transfer resource on the basis of the number of the received beams; and an operation of transmitting random access message in the random access resource defined by the beam resource corresponding to the determined number and the wireless transfer resource corresponding to the determined area.

Abstract: An apparatus for facilitating wireless communication that includes a base having a reference plane; a plurality of coils disposed on the base, the coils having elevation angles other than zero with respect to the reference plane and being tuned to a near field communication frequency; an input/output terminal; and a switching device selectively coupling the coils to the input/output terminal.

Abstract: An antenna system includes a first antenna, a second antenna, and a third antenna. The third antenna is disposed between the first antenna and the second antenna. Both the first antenna and the second antenna operate in a first frequency band. The third antenna operates in a second frequency band which is different from the first frequency band. The first antenna, the second antenna, and the third antenna are all disposed on the same plane.

Abstract: An information handling system operating a reconfigurable antenna training control system may comprise a configurable antenna system in one of a plurality of available configurations transceiving a radio frequency signal, and a radio frequency system measuring performance metrics for the signal transceived according to each available configuration over a training time period preset based on historical performance and stability of each available configuration. An antenna front end system may execute instructions of the reconfigurable antenna training control system to determine a weighted performance metric based on the measured performance metrics and on historical performance metrics for each candidate configuration, to compare the weighted performance metrics for each configuration, and to identify one of the configurations having a highest weighted performance metric as an optimal configuration. The configurable antenna may then establish a wireless link using the optimal configuration.

Abstract: A device and method for a user equipment (UE) to perform packet detection using multiple receive antennas. The UE receives a first signal at two or more of the plurality of receive antennas. The UE determines a first combined signal parameter based on the first signal received at the two or more receive antennas. The UE receives a second signal at the two or more receive antennas. The UE determines a second combined signal parameter based on the second signal received at the two or more receive antennas. The UE detects a packet based on at least identifying a correlation between the first combined signal parameter and the second combined signal parameter.

Abstract: An Integrated Circuit (IC) for an RFID tag includes at least two antenna ports for coupling to at least two antennas. The IC may be configured to determine the port from which it receives an input signal, and provide a first functionality if it receives the input from a first port and a second functionality if it receives the input from a second port. The IC may be configured to determine and/or offer a functionality based on the receiving port.

Abstract: A NodeB for a WCDMA system, arranged to transmit instructions to a UE for the UE's uplink transmissions. The NodeB is arranged to transmit the instructions on a dedicated downlink physical channel which the NodeB is arranged to use for transmissions to a plurality of UEs and which comprises a plurality of radio frames, where each radio frame comprises a number of slots and each slot comprises a number of WCDMA symbols. The instructions to the UE comprise Transmit Power Commands as well as other instructions to the UE for the UE's uplink transmissions. The NodeB is arranged to use a first WCDMA slot format for the TPC commands to the UE and a second WCDMA slot format for the other instructions to the UE.

Abstract: Apparatuses, methods, and systems are disclosed for enhanced measurements. One method includes performing, by use of a processor, a first measurement at a first time. The method includes determining an offset time selected pseudo-randomly from a set of values. The method includes performing a second measurement at a second time, the second time being the offset time after the first time. The second measurement is used for a carrier loading measurement.

Abstract: Systems, apparatuses, and methods for gap-based antenna measurement for antenna switch diversity, where there are fewer number of receivers or transmitters than the number of available antennas. The receivers may switch to additional antennas during a gap and switch back to the previous antennas. A device may select which antennas to use for communications based at least on measurements of additional antennas, thus supporting antenna switch diversity despite having fewer number of receiver chains.

Abstract: An antenna allocation method and a terminal for modems to receive a signal with a good antenna includes allocating a first antenna to a first modem; and if it is determined that the first modem satisfies a preset state, allocating the first antenna to any one of N?1 modems other than the first modem.

Abstract: Provides are a method and an apparatus for transmitting a feedback frame in a wireless local area network (WLAN) system. Specifically, a station (STA) receives, from an access point (AP), a null data packet announcement (NDPA) frame indicating transmission of a null data packet (NDP). The STA receives the NDP from the AP. The STA transmits, to the AP, a feedback frame including channel state information determined based on the NDP. The channel state information indicates a feedback subcarrier in each subcarrier group. The subcarrier group is generated based on grouping information using subcarriers in a frequency band excluding a guard subcarrier and a DC subcarrier. The feedback subcarrier is included in a subcarrier with an odd-numbered subcarrier index. The feedback subcarrier corresponds to a subcarrier with an even-numbered subcarrier index that is adjacent to the subcarrier with the odd-numbered subcarrier when the subcarrier with the odd-numbered subcarrier is a null subcarrier.

Abstract: A filter method for adapting a computing load to a computing capacity of a car-to-x communication system, in which method car-to-x messages are received and/or sent using the car-to-x communication system and the received car-to-x messages require processing by the car-to-x communication system. The filter method decides which of the received car-to-x messages to process and which of the received car-to-x messages to discard.

Abstract: A NFC object reader's NFC antenna system configured to dynamically change an element of the NFC antenna system to maintain the NFC antenna system's antenna default resonant frequency. The NFC antenna system can be configured to include a tuning subsystem, integrated with sensors to trigger tuning of NFC antenna system's antenna.

Abstract: A communication system includes an on-board unit adapted to a vehicle-vehicle communication and roadside equipment 10 performing a roadside-vehicle communication. In communications in service channels of the vehicle-vehicle communication, one reception-only service channel in which the on-board unit only performs a reception operation is provided for a plurality of the service channels and communications in the reception-only service channel is performed at the same frequency as that of the control channels of the roadside-vehicle communication. When the vehicle-vehicle communication is performed, the on-board unit performs switching to the roadside-vehicle communication in response to detection of reception in the reception-only service channel of a radio signal transmitted from the roadside equipment 10 in a control channel of the roadside-vehicle communication.

Abstract: A communication monitoring system including: a first base station device having a first service area, a second base station device having a second service area being included in the first service area and smaller than the first service area, a terminal device configured to perform a first radio communication with the first base station device when the terminal device is located in the first service area, and a second radio communication with the second base station device when the terminal device is located in the second service area, and a monitoring device configured to: receive first observation data acquired from the first radio communication, receive second observation data acquired from the second radio communication, and estimate a cause for the first observation data and the second observation data being obtained, based on the first observation data and the second observation data.

Abstract: A vehicle control system is described including radio-frequency receiver. The receiver includes an antenna input adapted for connection to an antenna for receiving radio frequency signals, a source of at least a first local oscillator frequency and a second local oscillator frequency, a demodulator for demodulating the signal received via the antenna input with the first local oscillator frequency to generate a first demodulated signal and, separately, for demodulating the signal received via the antenna input with the second local oscillator frequency to generate a second demodulated signal, and a control circuit that evaluates the first and second demodulated signals according to at least one criterion and utilizes for control purposes whichever of the demodulated signals is better, according to that criterion.

Abstract: A method includes communicating data to a plurality of user equipment (UE) in a cell using a plurality of beamforms. Each of the plurality of beamforms has a main lobe and side lobes, where the main lobe is directed toward a corresponding UE of the plurality of UE. For each beamform of the plurality of beamforms, a position of the beamform is determined. Furthermore, it is determined that one or more small cells of the plurality of small cells are available to serve the corresponding UE based on determining that the one or more small cells are positioned within the main lobe of the beamform using the determined position of the beamform and one or more positions of the one or more small cells. Based on the one or more small cells being determined as available to serve the corresponding UE, beamforming is disabled to the corresponding UE from the cell, thereby preventing the side lobes of the beamform from interfering with other radio communications in the cell.

Abstract: One method of estimating timing and frequency information of a payload transmitted through two or more frequency separated channels combines training fields from preambles from the two or more frequency separated channels to construct combined values that may be used to estimate the frequency and timing information. In one embodiment, the combined values may be determined by combining self-correlated training fields from the frequency separated channels. Another method of estimating the timing and frequency information selects the training fields from the preamble of one of the frequency separated channels based upon a signal quality metric. In another embodiment, the selection of the training fields based upon a signal quality metric may be biased to favor a particular channel.

Abstract: This disclosure provides systems, methods, and apparatus for antenna switching for simultaneous communication. An can include a plurality of antennas including a first antenna and a second antenna. The apparatus can further includes a plurality of receive circuits including a first receive circuit. The apparatus can further include a controller configured to determine one or more performance characteristics of the first antenna at a first time. The controller is further configured to determine a difference between the one or more performance characteristics of the first antenna at the first time and one or more performance characteristics of the first antenna at an earlier time. The controller is further configured to selectively switch the first receive circuit from receiving wireless communications via the first antenna to receive wireless communications via the second antenna if the difference is larger than a threshold. Other aspects, embodiments, and features are also claimed and described.

Abstract: The invention relates to a method for transmission in a wireless network comprising a plurality of base stations and at least one mobile terminal, a mobile terminal (MT) transmitting a same signal (704) intended for the plurality of base stations (BS1,BS2, BS3). In order to optimise the synchronisation of the mobile terminal with the plurality of base stations, the method comprises a step of transmission of an item of information representative of a first temporal offset intended for the mobile terminal, the first offset being according to at least one reception time (740, 750, 760) of the first signal by at least one base station (BS1,BS2,BS3).

Abstract: This disclosure provides systems, methods, and apparatus for antenna switching for simultaneous communication. In one embodiment, a wireless communication apparatus is provided. The wireless communication apparatus includes a plurality of antennas including a first antenna and a second antenna. The wireless communication apparatus further includes a plurality of receive circuits including a first receive circuit. The wireless communication apparatus further includes a controller configured to determine one or more performance characteristics of the first antenna over a plurality of sources. The controller is further configured to selectively switch the first receive circuit from receiving wireless communications via the first antenna to receive wireless communications via the second antenna if the one or more performance characteristics of the first antenna over the plurality of sources fall simultaneously. Other aspects, embodiments, and features are also claimed and described.

Abstract: A method and apparatus of selecting which of a plurality of receiver chains of a mobile unit to receive wireless signals, is disclosed. One method includes measuring a first receive signal quality while all of the plurality of receiver chains are receiving wireless signals, and measuring a second receive signal quality while a subset of the plurality of receiver chains are receiving wireless signals. The subset of the plurality of receiver chains are selected to receive wireless signal unless the first receive signal quality is a threshold better than the second receive signal quality. If the first receive signal quality is a threshold better than the second receive signal quality then all the plurality of receiver chains are selected to receive wireless signals.

Abstract: A mobile user terminal, which transmits downlink channel quality information indicating downlink channel quality and an uplink pilot signal to a base station, whereby a carrier frequency used for transmitting the downlink quality information and a carrier frequency used for transmitting the uplink pilot signal are selectable respectively from among a plurality of carrier frequencies assigned to the mobile user terminal; the mobile user terminal includes a radio transmitter, which transmits the downlink quality information and the uplink pilot signal in an intermittent fashion to the base station; and the radio transmitter transmits the downlink quality information and the uplink pilot signal by using a same carrier frequency among the plurality of carrier frequencies or by using adjacent carrier frequencies among the plurality of carrier frequencies, in a period corresponding to a state of intermittent communicate.

Abstract: An antenna array system and method is provided for reducing interference from a source moving relative to the antenna array system. The antenna array system includes a receiver and a plurality of antenna array elements arranged in a planar array. Each of the plurality of antenna array elements is in electrical communication with the receiver and in a locationally fixed position relative to the receiver. The plurality of antenna array elements receives a desired signal and interference from the source moving relative to the antenna array system. The receiver is configured to detect a presence of the interference. In response to the detection of the presence of the interference, the receiver is further configured to steer a deep antenna-pattern null in a direction of the interference.

Abstract: A transmitter including a first mixer, a first frequency divider to divide a frequency of an input signal to generate a first signal, and a plurality of second frequency dividers to divide the frequency to respectively generate a plurality of second signals, and a control module. In response to the transmitter being turned on, the control module turns on the first frequency divider, turns off the plurality of second frequency dividers, and drives the first mixer with the first signal. Subsequently, in response to determining that a transmit power of the transmitter is to be increased, the control module sequentially turns on and connects each of the plurality of second frequency dividers in parallel to the first frequency divider. Upon a second frequency divider being connected to the first frequency divider, the control module also drives the first mixer using the second signal generated by that second frequency divider.

Abstract: In some examples, a method for power control of control channels in a radio communication system is described. The method may include transmitting, with a first transmission power, first scheduling data in a common search space of a PDCCH. The method may also include transmitting, with a second transmission power, second scheduling data in a specific search space of the PDCCH.

Abstract: A communications apparatus. Multiple antennas are arranged to receive downlink signals and transmit uplink signals. A transceiver module is arranged to receive the downlink signals from the antennas and pass the uplink signals to an antenna selection device. The antenna selection device is coupled between the antennas and the transceiver module and arranged to receive the uplink signals to be transmitted from the transceiver module and dynamically pass the uplink signals to one of the antennas according to an antenna selection signal. A processor is arranged to receive the downlink signals from the transceiver module, calculate short-term signal qualities of the downlink signals and generate the antenna selection signal according to the short-term signal qualities.

Abstract: Methods and apparatus for power reduction in a wireless device having multiple receive paths are described herein. A wireless device configured for any one of multiple operating modes may utilize multiple receive signal paths to improve the receive signal quality in each of the operating modes. The wireless device may be configured to dynamically reconfigure a modulation coding scheme to compensate for varying signal qualities in some modes. The wireless receiver may be configured in other operating modes where the modulation coding scheme is fixed for a duration of the operating mode. The wireless device can conserve power when it is operating in a mode supporting a constant modulation coding scheme. The wireless device can determine a signal metric value of the received signals and can selectively power down or deactivate a receive signal path based on the value of the signal metric.

Abstract: Apparatus and methods for implementing “intelligent” receive diversity management in e.g., a mobile device. In one implementation, the mobile device includes an LTE-enabled UE, and the intelligent diversity management includes selectively disabling receive diversity (RxD) in that device upon meeting a plurality of criteria including (i) a capacity criterion, and (ii) a connectivity criterion. In one variant, the capacity criterion includes ensuring that an achievable data rate associated with a single Rx (receive) chain is comparable to that with RxD.

Abstract: The invention is directed to a method of communicating between a first node including a plurality of antennas and a second node, the method comprising the steps of: transmitting a signal from the first node to said second node using each of the plurality of antennas of the first node; at the second node, selecting one of the plurality of antennas for use; and communicating between the two nodes using this selected antenna. The invention is also directed to apparatus and software for performing the methods.

Abstract: A method and apparatus controls diversity reception in a wireless communication device. By determining a value based on a number of active set pilot signals received from a set of base stations, the wireless communication device dynamically enables or disables diversity reception. Diversity reception can be controlled by adjusting a diversity threshold based on the determined value. A channel quality indicator of a channel is measured and compared against the adjusted diversity threshold. The diversity reception mode is then enabled or disabled based on the comparison. For example, if the number of active pilot signals is above a predetermined value, indicating “good” coverage, the diversity threshold is decreased. The measured channel quality indicator is compared against the adjusted threshold, and diversity reception is enabled when the channel quality indicator is less than the decreased diversity threshold.

Abstract: A power control method applied to a radio network controller (RNC), a node B and a user equipment is provided. The method include steps of: determining a target block error rate; identify an initial signal-to-interference ratio (SIR) from a history look-up table (LUT) according to the target block error rate; estimating a measured block error rate between the RNC and the node B via the RNC; adjusting the initial SIR with reference to the measured block error rate and the target block error rate to generate an updated SIR; and controlling a signal transmission power of the user equipment with reference to the updated SIR via the node B.

Abstract: Methods and apparatus are provided for allowing a transmitter (Tx) to perform antenna selection independently of a receiver (Rx) in a transceiver supporting both transmit diversity and receive diversity. Certain aspects may utilize a cross switch, which may be used in a parallel or cross configuration, to provide for the independent antenna selection, such that the Rx may maintain the ability to operate on the same antenna as the Tx, on another antenna, or on both antennas for enhanced receive diversity. Furthermore, certain aspects may employ additional switching in the baseband domain in an effort to avoid, or at least reduce, switching glitches in the Rx caused by changing the cross switch configuration. In this manner, the Rx need not re-converge upon antenna switching.

Abstract: A power control applied to a radio network controller (40) when a user equipment (300) is in communication with a serving radio base station (10) and at least one other radio base station (20) involves the radio network controller (40) providing a quality representation of an uplink control channel (12) from the user equipment (300) to the serving radio base station (10). The radio network controller (40) generates an updated power quality target for a reference control channel based on the quality representation and transmits the updated power quality target to at least one of the serving radio base station (10) and the at least one other radio base station (20). Alternatively, the radio network controller (40) generates an updated power offset for the uplink control channel (12) relative a reference control channel based on the quality representation and transmits the updated power offset to the user equipment (300).

Abstract: A combination of antennas to be used is selected based on a distance between a plurality of antennas or the polarization direction of a radio signal to be transmitted/received.

Abstract: A reception quality information obtaining unit obtains reception quality information indicating reception quality of each of a plurality of antennas at predetermined intervals. A reception quality variation trend recognition unit recognizes a variation trend of a value in relation to reception quality of each of the antennas obtained. A correlation determination unit determines a degree of correlation between the antennas based on the variation trend of the value in relation to the reception quality of each of the antennas recognized. An antenna selection unit selects at least two antennas to be used for wireless communication, based on the degree of correlation between the antennas determined by the correlation determination unit.

Abstract: There are disclosed systems and methods that dynamically vary the word length of data being transmitted through a digital interface. In one embodiment, the method comprises: (i) obtaining at least one parameter indicative of a quality of a signal; (ii) if the at least one parameter indicates that the quality of the signal is above a threshold, then transmitting the data as a number of digital words at a first predetermined word length; (ii) if the at least one parameter indicates that the quality of the signal is below the threshold, then transmitting the data as a number of digital words at a second predetermined word length. The second predetermined word length is different from the first predetermined word length.

Abstract: A method for filtering measurement values of a measurement quantity obtained from a communication between a mobile device and a mobile communication network and a mobile communication network device adapted to filter such measurement values are provided. A measurement value for the measurement quantity is to be periodically received at fixed points in time. The measurement value is filtered using a digital filter for obtaining a filtering result, wherein the filtering of the measurement value includes the weighting of the measurement value with a weighting coefficient. The filtering result can be provided for an adaptation of the communication link to the mobile device.

Abstract: A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.

Abstract: A receiver of an object finder includes an antenna to receive a signal from a transmitter associated with the receiver, a PIN diode having a first terminal coupled with the antenna, and having a resistance that increases as a current flows therethrough decreases, and vice versa, a variable resistor coupled with the first terminal of the PIN diode to control the amount of a current flowing into the PIN diode, and a radio frequency integrated circuit (RF IC) having a first pin electrically coupled with second terminal of the PIN diode to receive the signal from the antenna via the PIN diode.

Abstract: A combination of antennas to be used is selected based on a distance between a plurality of antennas or the polarization direction of a radio signal to be transmitted/received.

Abstract: A method and apparatus for adjusting a channel quality indicator (CQI) feedback period to increase uplink capacity in a wireless communication system are disclosed. The uplink capacity is increased by reducing the uplink interference caused by CQI transmissions. A wireless transmit/receive unit (WTRU) monitors a status of downlink transmissions to the WTRU and sets the CQI feedback period based on the status of the downlink transmissions to the WTRU. A base station monitors uplink and downlink transmission needs. The base station determines the CQI feedback period of at least one WTRU based on the uplink and downlink transmission needs and sends a command to the WTRU to change the CQI feedback period of the WTRU.

Abstract: In an embodiment, vector training signals are received. Noise affecting the training signals is evaluated, and a noise indication is thus determined.

Abstract: The present disclosure presents methods and apparatuses for enhanced received signal processing using signal-based channel impulse response (CIR) estimation. For example, according to an example method presented herein, a user equipment (UE) or a component therein may receive a signal corresponding to a transmitted signal sent by a network entity, wherein the transmitted signal comprises at least a data channel, estimate chip contents of the transmitted signal, based on the received signal including the data channel, to obtain estimated chip contents, and compute an estimated channel impulse response (CIR) based on at least the estimated chip contents. Based on this estimated CIR, the UE may thereafter reprogram a received signal reconstruction filter, perform interference cancellation procedures, and/or adjust one or more equalizer taps. By performing such functions, the UE may exhibit improved communication characteristics and enable a more robust user experience.

Abstract: Disclosed is an RFID system that includes a controller that outputs the transmission signal to be transmitted to an RFID tag and reads a receiving signal transmitted from the RFID tag; a leakage signal canceller that receives a portion of the transmission signal and the receiving signal, and performs an adjustment task to generate a cancellation signal according to an adjustment value and the portion of the transmission signal to remove a transmission leakage signal and to remove the transmission leakage signal included in the receiving signal; and a reader controller that determines whether there is a change of an RF environment using an intensity of the receiving signal according in a period set in advance, controls an operation of the leakage signal canceller according to the change of the RF environment, and controls an operation of the controller to read the receiving signal transmitted from the RFID tag.

Abstract: Techniques to calibrate downlink and uplink channels to account for differences in the frequency responses of transmit and receive chains are described. In one embodiment, pilots are transmitted on downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Sets of correction factors are then determined based on estimates of downlink and uplink channel responses. A calibrated downlink channel is formed using a first set of correction factors for the downlink channel, and a calibrated uplink channel is formed using a second set of correction factors for the uplink channel. The first and second sets of correction factors may be determined using a matrix-ratio computation or a minimum mean square error computation. The calibration may be performed in real-time based on over-the-air transmission. Other aspects, embodiments, and features are also claimed and described.

Abstract: Disclosed is an apparatus for removing a transmission leakage signal of an RFID system including a reader controller that sends a transmission signal to an RFID tag and receives a receiving signal transmitted from the RFID tag to read tag information, the apparatus including a leakage signal canceller that receives a portion of the transmission signal and the receiving signal, and performs an adjustment task to generate a cancellation signal according to an adjustment value to remove a transmission leakage signal and the portion of the transmission signal, and to remove the transmission leakage signal included in the receiving signal and a controller that continuously determines whether there is a change of an RF environment using an intensity of the receiving signal, the RFID tag being installed in the RF environment, and controls an operation of the leakage signal canceller according to the change of the RF environment.