Abstract: According to one embodiment of the present specification, provided is a method for measuring a position in a wireless communication system. The method for measuring a position comprises the steps of: receiving observed time difference of arrival (OTDOA) assistance data from a positioning server; increasing an FFT sampling size when the value of a bandwidth of a positioning reference signal (PRS) included in the OTDOA assistance data is less than a first value; processing a plurality of received PRSs through the increased FFT sampling size; and calculating a reference signal time difference (RSTD) between the plurality of received PRSs.

Abstract: A receiver disposed in a serializer/deserializer (SerDes) system includes a coupling capacitor configured to receive a serial input signal from a transmitter operatively coupled with the receiver via a communication channel established therebetween and to output a capacitance output signal, an equalizer configured to receive a signal including the capacitance output signal having a baseline wander gain subtracted therefrom, a running disparity generator receiving decoded symbols and generating a running disparity signal, and a low-pass filter receiving the running disparity signal and outputting the BLW gain.

Abstract: The present invention relates to a method in which a signal is transmitted between a base station and a terminal in a multi-antenna wireless communication system. The method transmits pre-estimated channel information to the terminal when the terminal moves to a specific position when channel estimation for a specific position is performed. As for the terminal which moves along a fixed route or the route of which can be estimated, the position of the terminal in the near future can be easily detected. Therefore, the transception of channel information can be performed in a more efficient manner in consideration of the above-described special environment.

Abstract: A reception system for a control unit in a vehicle having a voltage generator for generating a synchronization pulse which generates the synchronization pulse within predefined specification limits and having a predefined shape and a predefined time behavior, the reception system outputting the synchronization pulse for synchronizing a signal transmission via a data bus to at least one sensor, and a method for generating such a synchronization pulse. The voltage generator includes a voltage amplifier which generates the synchronization pulse generally as a sinusoidal oscillation based on a reference voltage.

Abstract: A mobile terminal is disclosed. A mobile terminal according to one embodiment of the preset invention includes a first touch screen including a sub display, a second touch screen including a main display, a touch recognition sensor configured to recognize a first touch input and a second touch input starting on a first position of the first touch screen, a memory configured to store the recognized first touch input and the second touch input as a unlock pattern and if a third touch input and a fourth touch input starting on a second position of the first touch screen are recognized by the touch recognition sensor, a controller configured to compare the unlock pattern stored in the memory with the recognized third touch input and the fourth touch input and execute unlock of the main display according to a result of the comparison.

Abstract: Systems and methods including a database storing the identifiers of cells representing residential parcels of real estate properties. Mobile devices determine the coordinates of their locations during a period of time using a location determination system, such as a global positioning system. The coordinates are converted to cell identifiers to look up corresponding residential parcels that have been visited by the mobile devices. A server generates a visitation data set for each residential parcel visited by each mobile device, including different types of frequencies of the mobile device visiting the residential parcel (e.g., night, weekend). A server filters the residential parcels based on visitation frequencies to identify home candidates and then further filters the home candidates based on the count of mobile devices having the home candidates. A home parcel, and thus its address, is identified from the filtered home candidate(s) for each mobile device.

Abstract: An antenna system, which is coupled to one or more first transceivers for processing signals according to one or more protocols, respectively, and to a second transceiver for performing a function in conjunction with at least one of the one or more protocols, is provided. The antenna system includes a first antenna, a second antenna, a circuit coupled to the first and second antennas, and a controller configured to control the circuit for enabling beam forming and beam steering or for enabling the function in conjunction with the at least one of the one or more protocols. The circuit includes a phase shifting block configured to provide multiple phase shifts between a first radiation pattern associated with the first antenna and a second radiation pattern associated with the second antenna to generate multiple combined radiation patterns corresponding to the phase shifts, respectively, for the beam forming and beam steering purposes.

Abstract: A method and apparatus for compensating is described, in which a tuning network is electrically coupled to an antenna and to a phase shift network. Baseband signals travel to and from the phase shift network. A controller communicatively linked to the tuning network and to the phase shift network receives data regarding the state of a communication device. The controller changes the impedance of the tuning network, and changes the phase shift of the phase shift network based on the received data. The received data may include information regarding the channel, band, or sub-band on which a communication device is communicating; information regarding on the application state of the device; information regarding the modulator and demodulator state of the device; and information regarding the state of the communication device's antenna.

Abstract: Methods for determining a location of a client device in a wireless network having at least a first other network device with a known location are disclosed. Transmission-to-self calibrations are performed at the first other network device and/or the client device to determine RF group delay of the first other network device and/or the client device. The client device receives messages and acknowledgements from the other network devices and determines its location based on information received including the time at which it received the messages, the acknowledgements and the RF groupdelay of the first other network device. As such, the location calculation can be refined by accounting for the RF group delays of the first other network device and/or the client device.

Abstract: A method and apparatus for using demodulation reference signal (DM-RS) based channel state information (CSI) feedback in Orthogonal Frequency Division Multiplexing-multiple-input multiple-output (OFDM-MIMO) systems is disclosed. The wireless transmit/receive unit (WTRU) receives one or more resource blocks from a base station, wherein the resource blocks (RBs) include demodulating reference signals (DM-RS) and precoder information. The precoder information is sent unicast or broadcasted over a common control channel. The WTRU estimates an effective channel estimate based on the DM-RS, derives an unprecoded channel based on the effective channel and the precoder information, generates CSI feedback based on the unprecoded channel, and transmits the CSI feedback to the base station. Alternatively, the WTRU estimates an effective channel estimate based on the DM-RS, quantizes the effective channel estimate and transmits the CSI feedback to the base station.

Abstract: An interface module for a unit designed to transmit and/or amplify communication signals inside an antenna distribution system includes a first analog interface for forwarding and receiving communication signals from mobile terminals and a second interface for forwarding and receiving communication signals from the antenna distribution system. A signal path forwards the received communication signals between the first and second interfaces. A controllable digital unit in the signal path is configured for digitizing incoming communication signals to digital signals and converting outgoing communication signals to analog signals. The digital unit is configured to evaluate characteristic signal parameters of the digital communication signals and select a subset of signals from the digital communication signals. The controllable digital unit is further configured for forwarding the selected subset of signals.

Abstract: A wireless communication device for sending quantization quality feedback is described. The wireless communication device includes a receiver that receives a signal. The wireless communication device also includes channel estimation circuitry coupled to the receiver. The channel estimation circuitry generates a channel estimate based on the signal. The wireless communication device also includes feedback determination circuitry coupled to the channel estimation circuitry. The feedback determination circuitry generates quantization quality feedback based on the channel estimate. The wireless communication device also includes a transmitter coupled to the feedback determination circuitry. The transmitter transmits the quantization quality feedback.

Abstract: A method for transmitting and receiving a signal and an apparatus for transmitting and receiving a signal are disclosed. The method for receiving the signal includes receiving (S210) the signal in a first frequency band, identifying (S220) a first pilot signal including, a cyclic prefix obtained by frequency-shifting a firstportion of an useful portion of the first pilot signal and a cyclic suffix obtained by frequency-shifting a second portion of the useful portion of the first pilot signal from the received signal, demodulating (S220) a signal frame including a physical layer pipe (PLP) to which a service stream is converted, by an orthogonal frequency division multiplexing (OFDM) scheme, using information set in the first pilot signal, parsing (S230) the signal frame and obtaining the PLP and obtaining (S240) the service stream from the PLP.

Abstract: A method and system are provided for reducing the peak factor in a multi-carrier communication system, the data being transmitted on m channels comprising, in the transmission of data in the form of a frame, a step in which a number d of desynchronization symbols are introduced at the start of each of the frames, the number d being chosen as a function of the transmission channel number concerned.

Abstract: Systems and methodologies are described for processing information at a device operating in a wireless communication system. Techniques for in-phase and quadrature (I/Q) calibration, interference cancellation, channel estimation, and signal-to-noise ratio (SNR) and rank metric calculation are provided herein. As provided herein, one or more of the described techniques can be used to adjust the performance of a wireless station in the presence of impairments to the wireless station and/or a communication link used by the wireless station.

Abstract: The present invention relates to a method for a transmission end transmitting a feedback by using a codebook in a wireless communication system, which supports a multiple antennas, comprising the steps of: determining a first codeword for a first horizontal antenna group from a first codebook, which comprises at least one precoding matrix and is selected for a plurality of horizontal antenna groups from a predetermined codebook; determining a second codeword for a second horizontal antenna group; determining a third codeword for each of the antenna groups other than the first and second horizontal antenna groups, from the plurality of horizontal antenna groups; and providing a feedback of at least one of first, second and third codewords to a receiving end, wherein the third codeword is determined according to a phase increase value, which is determined in accordance with the first and second codewords.

Abstract: A location model updating apparatus updates a location model based on data uploaded from a mobile terminal. A certainty of data observed at a location having a location name designated by a user is computed based on a previous histogram, for each most recent check-in data uploaded during a time from previous to current histogram updating, and a most recent histogram is generated based on the certainty. The location is detected using the previous histogram, based on a received signal strength included in each most recent check-in data, in order to judge whether the check-in data is correct, depending on whether a location name of the detected location matches the location name designated by the user and included in each most recent check-in data.

Abstract: A charging station performs communications by use of a superimposing/separating unit configured by connecting a capacitor, a coupling transformer and a capacitor to branch lines branching out respectively from a control cable and a grounded cable. An electric vehicle performs communications by use of a superimposing/separating unit configured by providing a coupling transformer to the control cable. A capacitor is also connected between the control cable and the grounded cable. Communications are allowed by the configuration of a closed loop circuit comprising the control cable, the branch line, the capacitor, a primary coil of the coupling transformer, the capacitor, the branch line, the grounded cable, the capacitor, and a primary coil of the coupling transformer.

Abstract: A method and apparatus are provided to generate a preamble signal. A peak of each pulse of the preamble signal is synchronized with a sensitivity region of a super regenerative receiver (SRR). The method and apparatus are configured to transmit, to the SRR, a data packet comprising the preamble signal, wherein the data packet is a baseband signal corresponding to the preamble signal.

Abstract: A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses baseband signal samples resulting from analog to digital conversion of a received analog signal followed by digital downconversion. The compressed signal samples are transferred over the serial data link to the baseband processor then decompressed prior to normal signal processing. For the downlink, the baseband processor compresses baseband signal samples and transfers the compressed signal samples to the RF unit. The RF unit decompresses the compressed samples prior to digital upconversion and digital to analog conversion to form an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems, including OBSAI or CPRI compliant systems.