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| Number | Title | Issue Date |
| 8160122 | Method and system for uplink communication A method for conserving bandwidth in a communication system includes spreading a data frame using a first pseudo-noise (PN) spreader. A broadcast frame is spread using a second PN spreader. A complex data stream having a first component and a second component is gen... | 04/17/2012 |
| 8098713 | Methods and apparatus for generating and communicating wireless signals having pilot signals with variable pilot signal parameters An embodiment for wirelessly communicating a signal includes a transmitter generating and transmitting a wireless signal over a wireless communication channel. The wireless signal includes a guard band, data represented within a plurality of data-bearing subcarriers... | 01/17/2012 |
| 8036256 | Method and apparatus for generating and transmitting code sequence in a wireless communication system A method of generating a code sequence in a wireless communication system is disclosed. More specifically, the method includes recognizing a desired length of the code sequence, generating a code sequence having a length different from the desired length, and modify... | 10/11/2011 |
| 7986725 | Spread spectrum transmission systems A code phase signalling module arranged to provide code phase signalling to assist in signal acquisition of direct sequence spread spectrum signalling received by a receiver module from a transmitter module. The code phase signalling is arranged to be used by the re... | 07/26/2011 |
| 7953137 | Method and apparatus for generating and transmitting code sequence in a wireless communication system A method of generating a code sequence in a wireless communication system is disclosed. More specifically, the method includes recognizing a desired length of the code sequence, generating a code sequence having a length different from the desired length, and modify... | 05/31/2011 |
| 7916771 | BOC signal acquisition and tracking method and apparatus A method and apparatus for acquiring and tracking a BOC signal in a satellite navigation receiver includes a synthesized acquisition test function or a discriminator for code delay provided by combining a BOC autocorrelation function and a BOC/PRN cross-correlation ... | 03/29/2011 |
| 7885315 | Pilot scrambling in communications systems The specification and drawings present a new method, system, apparatus and software product for pilot scrambling using a scrambling code (e.g., pseudo-noise code such as a Gold code, a Kasami code, a Hadamard code, m-sequences, etc.) in communication systems, e.g., ... | 02/08/2011 |
| 7835422 | Semiconductor device In a semiconductor device having a large-scale arithmetic circuit, when there is delay in clock signals, a malfunction occurs in a circuit. In particular, in an environment where supply voltage varies as in a wireless chip, it is very difficult to precisely estimate... | 11/16/2010 |
| 7809046 | Timing-offset estimation in modulated signals using weighted correlation values In one embodiment, a timing-offset estimator calculates a correlation value for each sample of an OFDM signal having a cyclic prefix for each OFDM symbol. The correlation value is provided to a tapped delay line that applies a separate weight to each of 2V correlati... | 10/05/2010 |
| 7778307 | Allocation of control channel for radio resource assignment in wireless communication systems A wireless communication device for receiving a frame (200) corresponding to a transmission time interval, the frame having a control channel (210) including at least two control channel elements (212, 214) and an embedded bit sequence, the loca... | 08/17/2010 |
| 7760793 | Pilot scrambling enabling direct pilot sequence detection in initial acquisition in evolved UTRA A communications network and method thereof include a base station controller configured to provide a repetition period of a primary synchronization channel to be equal to a predetermined integer value times a scrambling code length of the scrambling code of a commo... | 07/20/2010 |
| 7746918 | Bit synchronization method and system for a GPS A bit synchronization method and system for a GPS, which receives a satellite signal sent by a satellite to accordingly produce a synchronous signal. Each data bit of the satellite signal consists of N CA-codes. A data buffer receives and stores the data bits of the... | 06/29/2010 |
| 7720132 | Energy—bandwidth tradeoff and transmit waveform design using interference and noise whitening method A new method for transmitter-receiver design that enhances the desired signal output from the receiver by whitening the total interference and noise input to the receiver and maximizing the output Signal to Interference plus Noise power Ratio (SINR) is presented. As... | 05/18/2010 |
| 7649925 | Time transfer utilizing ultra wideband signals Time is transferred from an ultra wideband (UWB) transmitter to UWB receiver by transmitting a signal structure having an associated timing reference point together with a time value for the timing reference point. The UWB receiver receives the timing signal structu... | 01/19/2010 |
| 7627020 | Acquisition circuit for low chip rate option for mobile telecommunication system A User Equipment (UE) receives and samples communication signals, where the communication signals have a time frame format, a transmission chip rate and a synchronization code associated with a time slot that includes a midamble that indicates a modulation of the sy... | 12/01/2009 |
| 7609752 | Transmitter and transmission control method used in random access communication environment A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement determination unit configured to determine placement of pilot symbols based on t... | 10/27/2009 |
| 7570684 | Method for joint time synchronization and frequency offset estimation in OFDM system and apparatus of the same Embodiments of the present invention include a method for performing joint time synchronization and carrier frequency offset estimation in a wireless communication system, comprising steps of: on a transmitter: performing frequency domain spreading and interleaving ... | 08/04/2009 |
| 7561614 | Communication apparatus and communication method using digital wavelet multi carrier transmission system In case of disposing a pilot symbol in data transmission which depends on a DWMC transmission system, in a plurality of transmission symbols on a time axis, a pilot symbol, which becomes a signal of a sine wave, is configured, by giving contiguous identical data in ... | 07/14/2009 |
| 7545848 | High resolution time stamps for periodic samples A method and apparatus for collecting digital sample data from a target system accesses the digital sample data at transitions of a sample clock, acquires information related to an instantaneous average period of the sample clock, and records the digital sample data... | 06/09/2009 |
| 7483473 | Access channel structure for wireless communication system A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or epoch, a portion is dedicated to sending only pilot symbols. Another por... | 01/27/2009 |
| 7447253 | Method and apparatus for processing satellite positioning system signals to obtain time information A method and apparatus for processing satellite positioning system signals at a mobile receiver is described. In one example, first bit-transitions within satellite navigation data transmitted by at least one satellite are estimated at the mobile receiver. A bit pat... | 11/04/2008 |
| 7437177 | Method employed by a base station for controlling initial power ramp-up using short codes A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period ... | 10/14/2008 |
| 7426391 | Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to... | 09/16/2008 |
| 7423577 | System and method for transmitting high data rate information from a radar system A system and method for transmitting high data rate information from a pulsed radar is disclosed. The method includes collecting information using a mobile radar platform. The information is divided into a plurality of segments. Each segment is configured to fit wit... | 09/09/2008 |
| 7412014 | Timing-adjusting method and apparatus, and diversity receiving method and apparatus An A-D conversion unit performs analog-to-digital conversions on baseband signals. A correlation processing unit carries out a correlation processing. A power computing unit computes the power of correlation values. An inter-signal condition determining unit compare... | 08/12/2008 |
| 7403507 | System and method for recovering system time in direct sequence spread spectrum communications A sleep control system and method are provided that permit a reference clock and the direct sequence spread spectrum (DSSS) modem in a mobile station receiver to be turned off and turned back on at arbitrary points in time while still maintaining accurate base stati... | 07/22/2008 |
| 7403555 | Acquisition circuit for low chip rate option for mobile telecommunication system A User Equipment (UE) has a circuit that performs the acquisition for the low chip rate option of the Universal Mobile Telecommunication System (UMTS) Time Division Duplex (TDD) standard as formulated by the Third Generation Partnership Project (3GPP). The present i... | 07/22/2008 |
| 7400654 | Method for synchronizing a receiver with a transmitter A method is provided for synchronizing a receiver with a transmitter, wherein a first synchronization signal with a multiplicity of second synchronization signals is transmitted from the transmitter to the receiver, a set of second synchronization signals is subdivi... | 07/15/2008 |
| 7388899 | Spreading code structure for ultra wide band communications The ultra wide band communication system of the present invention includes a transmitter (station) and a receiver (station). The transmitter and the receiver employ spreading code comprised of code groups, which respectively comprise varied, auto-correlated codes. C... | 06/17/2008 |
| 7388901 | Method for receiving spectrum spreading signals with frequency shift correction A method for receiving spectrum spreading signals using a Doppler-effect frequency-shift correction generates a corrective signal based on an estimation of a modulation period related to the Doppler effect detected in a preamble portion of a received signal. The cor... | 06/17/2008 |
| 7386026 | Method and system for synchronizing and selectively addressing multiple receivers in a wireless, spread spectrum communication system A system and method for synchronizing and selectively addressing multiple receivers in a wireless communication system includes a spread spectrum transmitter and one or more spread spectrum receivers. The transmitter transmits a signal having an observable parameter... | 06/10/2008 |
| 7386035 | Method of compensating for energy loss and eliminating inter-symbol interference and inter-chip interference and rake receiver for WLAN adopting the same Provided is a method of compensating for energy loss and eliminating inter-symbol interference (ISI) and inter-chip interference (ISI) in wireless signals, and a rake receiver for wireless LANs adopting the same. The rake receiver compensates for energy loss of a CC... | 06/10/2008 |
| 7379748 | Method for speeding up synchronization by having a search frequency list comprising a limited number of search frequencies A method for initial synchronization in a mobile telecommunications network to connect a mobile terminal (10) to a base station (12). The mobile terminal has a search frequency list comprising a limited number of search frequencies. The method comprise... | 05/27/2008 |
| 7372926 | Radio receiver apparatus In order to perform diversity reception efficiently without increasing the scale of the apparatus, when the total number of simultaneously connected cells has reached N cells including an HSDPA serving cell a control section 104 keeps a switch 103 conn... | 05/13/2008 |
| 7369847 | Fixed cell communication system with reduced interference A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same communication resource is provided. Preferably, cells having the sam... | 05/06/2008 |
| 7366141 | Cell search method and apparatus in a WCDMA system A cell search method for use in a mobile communication system, the method including: performing one or more identification steps for identifying timing and codes of oversampled input signals; and reducing the resolution of the oversampled input signals before perfor... | 04/29/2008 |
| 7366228 | Synchronization detecting apparatus In a channel estimating circuit, a Sync Word is demodulated by using a channel estimation value not with a symbol or a slot including the Sync Word to be demodulated, but with its preceding and succeeding symbols or slots. Furthermore, in a channel estimation proces... | 04/29/2008 |
| 7366908 | Digital watermarking with content dependent keys and autocorrelation properties for synchronization A digital watermark detection method exploits autocorrelation properties of the watermarked signal that enable synchronization of the digital watermark despite temporal or geometric distortion of the host signal. Other watermark methods employ keys, including a key ... | 04/29/2008 |
| 7364084 | Integrated circuits with persistent data storage The circuitry introduced in this invention selectively slows down the functioning of an electronic circuit by maintaining a particular state for a prolonged period of time. This circuitry is used not only to achieve the desired effect in maintaining security from el... | 04/29/2008 |
| 7356335 | Wireless communication apparatus A wireless communication apparatus coordinates communication among a set of mobile stations by giving the mobile stations permission to transmit packets. The mobile stations divide comparatively long packets into shorter fragment packets. When the wireless communica... | 04/08/2008 |
