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| Application No. | Application Title | Issue Date |
| 20120027053 | METHOD AND APPARATUS FOR REDUCING MULTI-USER PROCESSING IN WIRELESS COMMUNICATION SYSTEMS A method and apparatus is disclosed for reducing multi-user processing at the receiver in wireless communication systems. Detected codes are grouped according to channel impulse response and a parent code is identified for each group of detected codes. A matrix A is con... | 02/02/2012 |
| 20110150240 | MODULATION DEVICE AND DEMODULATION DEVICE A modulation device includes: a spread code generation unit which generates a spread code having a predetermined cycle; an audio signal input unit to which an audio signal is input; a first modulation unit which phase-modulates the spread code in each cycle on the basis... | 06/23/2011 |
| 20110007782 | RECEIVER, SIGNAL PROCESSING METHOD AND PROGRAM A receiver includes a receiving unit that receives a signal from a satellite, a frequency conversion-discretization unit that converts the signal received in the receiving unit into an intermediate frequency signal of a frequency bandwidth including 0 Hz, and discretize... | 01/13/2011 |
| 20100329311 | UPLINK SIGNAL DETECTION IN RF REPEATERS A method for detecting an IS-95 signal without knowledge of a spreading code for the IS-95 signal is provided. A received baseband signal is rotated through a plurality of phase-shifts. For each phase-shifted baseband signal, an in-phase component or a quadrature compon... | 12/30/2010 |
| 20100309957 | CONTINUOUS TIME CHAOS DITHERING Embodiments of the present invention provide a system and method for further reducing cyclostationarity and correspondingly energy density in a chaotic spread spectrum data communication channel, by digitally generating a first chaotic sequence of values to form a sprea... | 12/09/2010 |
| 20100254437 | SIGNAL PROCESSING APPARATUS, INFORMATION PROCESSING APPARATUS, SIGNAL PROCESSING METHOD, DATA DISPLAY METHOD, AND PROGRAM In a signal processing apparatus a synchronizer acquires synchronization with the spreading code of an intermediate frequency signal converted from a signal received from a satellite in a global positioning system. A demodulator then demodulates a message contained in t... | 10/07/2010 |
| 20100215084 | SIMPLE AND ROBUST DIGITAL CODE TRACKING LOOP FOR WIRELESS COMMUNICATION SYSTEMS A simple and robust CTL is used for time tracking of multipath components of a spread spectrum signal transmitted over a wireless multipath fading channel. A digital code-tracking loop includes the implementations of despreading early and late data samples by use of a p... | 08/26/2010 |
| 20100172394 | METHOD OF AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL AT VARIABLE DATA RATE IN HUMAN BODY COMMUNICATIONS Provided are a method and apparatus for transmitting and receiving a signal at a variable data rate in human body communications. The apparatus includes a header generator, a data generator, a spreader, and a multiplexer. The header generator generates header informatio... | 07/08/2010 |
| 20100166045 | METHOD FOR OBTAINING PRECISE SAMPLING FREQUENCY OF GLOBAL POSITIONING SYSTEM (GPS) A method for obtaining a precise sampling frequency of a global positioning system (GPS) is applied in a GPS receiver. First, a radio frequency (RF) module of the GPS receiver is used to receive a satellite signal from at least one satellite. Then, a plurality of code d... | 07/01/2010 |
| 20100142596 | SYNCHRONIZATION ERROR TRACKING DEVICE AND METHOD THEREOF Provided is a synchronization error tracking device and method. The method and system estimates and corrects the synchronization error generated by time and frequency offsets during the data transmission interval and uses a module designed for initial synchronization or... | 06/10/2010 |
| 20100135362 | FRAME SYNCHRONIZATION METHOD AND RECEIVER FOR COMMUNICATION MODEM USING THE SAME Disclosed are a frame synchronization method and a receiver for a communication modem using the same. The frame synchronization method includes performing a correlation operation between a reception data stream and a preamble to output a synchronous signal; and computin... | 06/03/2010 |
| 20100118920 | SATELLITE COMMUNICATION TRANSMITTER AND RECEIVER FOR REDUCING CHANNEL INTERFERENCE Satellite communication transmitter and receiver in a DVB-S2 system are provided. The satellite communication transmitter includes a modulator to modulate a satellite communication signal to be transmitted, and a spread spectrum unit to spread the modulated signal and t... | 05/13/2010 |
| 20100098137 | DETECTION DEVICE OF A SPREADING CODE AND A TIMING, AND A METHOD THEREOF An A/D converted and inputted signal is stored in a memory. A sliding correlator sequentially reads the signal stored in the memory and despreads this signal. A despreading timing is adjusted and then the candidate for a despreading code is outputted from a code generat... | 04/22/2010 |
| 20100027591 | POSITIONING SIGNAL RECEPTION DEVICE AND CONTROL METHOD OF POSITIONING SIGNAL RECEPTION DEVICE A positioning signal reception device receives a positioning signal transmitted from a position information satellite, and includes: a signal reception portion that obtains a reception signal by receiving the positioning signal; an A/D conversion portion that generates ... | 02/04/2010 |
| 20090310653 | HYBRID POLYPHASE AND JOINT TIME-FREQUENCY DETECTION A demodulator (150) in a receiver (100) includes a correlator (240) for de-spreading a spread-spectrum signal, and decision module (250) for detecting a preamble and for synchronizing to data frames of the spread spectrum signal. The demodula... | 12/17/2009 |
| 20090285268 | Signal receiver using data bit search in alternating time segments A GNSS receiver and method using alternating “A” and “B” time segments for a reception time length of two or more data bits. The GNSS signal in an “A” time period comprising the “A” time segments is integrated for determining “A” magnitudes correspon... | 11/19/2009 |
| 20090268785 | Mobile Communication Terminal, Synchronization Judging Circuit Used in the Mobile Communication Terminal, Control Method, Synchronization Judging Control Program Disclosed is a mobile communication terminal employing a code division multiple access scheme, in which when it is decided that the common channel level is equal to or higher than a third threshold (common channel level threshold), an RLF decision control unit compares ... | 10/29/2009 |
| 20090238248 | SPREAD SPECTRUM WITH DOPPLER OPTIMIZATION A method of compensating for doppler phase errors includes receiving a signal at a receiver wherein the signal is spread using a pseudo-noise code, dividing the signal into a plurality of smaller coherent units and then compensating for induced doppler phase errors by a... | 09/24/2009 |
| 20090213911 | CODE TRACKING LOOP WITH AUTOMATIC POWER NORMALIZATION The present invention is for a receiver incorporated into User Equipment (UE) or base stations of a code division multiple access (CDMA) communication system. The UE and base station are in communication with one of the plurality of base stations and receives a communic... | 08/27/2009 |
| 20090180524 | Device and method for fast transition from preamble synchronization to data demodulation in direct sequence spread spectrum (DSSS) communications A device for fast transition from preamble synchronization of a received baseband signal to demodulation of the received baseband signal may include a baseband chip tracking loop to generate an offset tracking value to track any initial chip phase offset and Doppler-cau... | 07/16/2009 |
| 20090052504 | COMMUNICATION TERMINAL, BASE STATION, AND RECEIVING METHOD A communication terminal in which a circuit component can measure active sets thereby to reduce the circuit scale. In the terminal, a synchronization base station switch (105) outputs a switching timing signal so that frequency shift information, reception timing... | 02/26/2009 |
| 20090041095 | METHOD AND APPARATUS FOR FINE FREQUENCY SYNCHRONIZATION IN WIRELESS BROADBAND (WIBRO) SYSTEM WITHOUT USING GLOBAL POSITIONING SYSTEM (GPS) RECEIVER Provided is a fine frequency synchronization method of a WiBro system, and particularly, a fine frequency synchronization method which measures a spread degree of a received signal of an adjacent subcarrier using orthogonality of PN sequences and thereby estimates a fre... | 02/12/2009 |
| 20090016413 | PSEUDO RANDOM CLOCK GENERATOR A pseudo random clock generator includes a clock generator for generating a clock signal. A pseudo random code generator receives the clock signal and thereby generating a pseudo random code. A code limiter enables the value of the pseudo random code being unchanged for... | 01/15/2009 |
| 20080310486 | PRAGMATIC ADAPTIVE MRC AND MMSE MIMO-OFDM RECEIVER ALGORITHM An adaptive receiver algorithm is disclosed, for use in MIMO-OFDM systems. The adaptive receiver algorithm selectively chooses either the MRC technique or the MMSE technique, for optimum receiver performance, depending on the characteristics of the wireless environment.... | 12/18/2008 |
| 20080304554 | METHOD AND APPARATUS FOR ESTIMATING IMPAIRMENT COVARIANCE MATRICES USING UNOCCUPIED SPREADING CODES In one of its aspects, the technology concerns a method of processing a signal which includes physical data channels which have been channelized using spreading codes. The method comprises (1) despreading unoccupied spreading codes (e.g., codes which are essentially uno... | 12/11/2008 |
| 20080267264 | Low phase noise clock generator for device under test According to one embodiment, a low phase noise clock generator includes a frequency multiplier using a crystal oscillator, which is configured to receive a reference clock and to generate a multiplied reference clock. The low phase noise clock generator further includes... | 10/30/2008 |
| 20080260008 | METHODS AND APPARATUS FOR TIME TRACKING USING ASSISTANCE FROM TDM PILOTS IN A COMMUNICATION NETWORK Methods and apparatus for time tracking using assistance from TDM pilots in a communication network. In an aspect, a method is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The method ... | 10/23/2008 |
| 20080260007 | Method and Apparatus for Achieving Channel Variability in Spread Spectrum Communication Systems A method and apparatus are disclosed for modulating a communication signal in a code division multiple access (CDMA) environment using orthogonal N by N Hadamard spread spectrum codes Orthogonal spreading codes are used that have lengths that are not a power-of 2 to pro... | 10/23/2008 |
| 20080212655 | SIMPLE AND ROBUST DIGITAL CODE TRACKING LOOP FOR WIRELESS COMMUNICATION SYSTEMS A simple and robust CTL is used for time tracking of multipath components of a spread spectrum signal transmitted over a wireless multipath fading channel. A digital code-tracking loop includes the implementations of despreading early and late data samples by use of a p... | 09/04/2008 |
| 20080144704 | Spreading codes An apparatus including a spreading code generator for generating a spreading code; a scrambling code generator for generating a scrambling code; and a modulator for scrambling the spreading code using the scrambling code to produce a modified spreading code.... | 06/19/2008 |
| 20080130720 | RECEIVER PROCESSING SYSTEM A method of adjusting the relative timing of a spreading sequence and a sampled input signal for a spread spectrum receiver correlator, the spreading sequence having an associated spreading sequence chip clock, the input signal being sampled at sample clock intervals, t... | 06/05/2008 |
| 20080130721 | RECEIVER PROCESSING SYSTEM A spread spectrum receiver architecture comprising: a spread spectrum signal sampler; a sample delay stage, coupled to the spread spectrum sampler, to provide a set of spread spectrum samples having a plurality of different delays on a delayed sample bus; a plurality of... | 06/05/2008 |
| 20080117955 | SPREAD-SPECTRUM PHASE AND CHANNEL TRACKING Common components are used to detect messages from a variety of transmitters, and the characteristics of each detected message are used to dynamically configure the demodulation process for each message. Channelization is selectively performed before, after, or before-a... | 05/22/2008 |
| 20080101442 | Simplified timing correction for data despreading of serial offset quadrature pulse-shaped spread signals A simplified timing correction method is provided for data despreading of serial offset quadrature pulse-shaped spread signals. The simplified timing correction algorithm is applied to a rake receiver for improved performance in a multi-path channel. Serial formatting o... | 05/01/2008 |
| 20080095217 | CORRELATION DETECTION METHOD, CORRELATION DETECTION APPARATUS, TRANSMISSION DIVERSITY DETECTION METHOD AND TRANSMISSION DIVERSITY DETECTION CIRCUIT A correlation detection apparatus detects a correlation between a reception signal and a spreading code. A logic circuit is operated with a chip clock. The logic circuit generates the spreading code of an offset unit of ½ chip according to a combination value of chips ... | 04/24/2008 |
| 20080069188 | Virtual reference timing for multi-time based systems A timing-reference circuit is employed by a multi-time-based system in which a timing reference is required for system processing. The timing-reference circuit may be used in a wireless receiver in which one or more transmitted signals are received as multipath signals,... | 03/20/2008 |
| 20080037613 | SPREAD SPECTRUM CLOCK GENERATOR AND METHOD A spread spectrum clock signal generator and an accompanying method provide a spread spectrum clock signal of a reduced electromagnetic interference. The spread spectrum clock signal generator includes (a) a state machine, which maintains a current state of the spread s... | 02/14/2008 |
| 20080013604 | METHOD AND APPARATUS FOR DETERMINING BOUNDARIES OF INFORMATION ELEMENTS A method for determining boundaries of information elements for a PRN code modulated signal is provided. The method of the present invention uses an estimated symbol phase of the received signal and correlation values of different durations to determine the information ... | 01/17/2008 |
| 20080013605 | Method of GPS bit synchronization A method of GPS bit synchronization is disclosed. The method includes the steps of a) receiving plural serial C/A Codes, wherein a data bit is formed by m C/A Codes; b) sequentially providing a bin number ranged from 0 to m−1 to the plural C/A Codes; c) setting a samp... | 01/17/2008 |
| 20070263705 | Method and apparatus for detecting spreading-code synchronization for spectrum spreading signals A spreading-code synchronization detection method for a spectrum spreading signal that increases the sensitivity of spreading-code synchronization detection and in which a spreading-code synchronization detection is applied to a spectrum spreading signal obtained by spe... | 11/15/2007 |
