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| Number | Title | Issue Date |
| 7539238 | Extended algorithm data estimator A method of data estimation for a Time Division Duplex (TDD) Code Division Multiple Access (CDMA) system or any other system using an extended algorithm (EA) in preference to a truncated algorithm (TA). The EA avoids implementation errors by choice of proper extende... | 05/26/2009 |
| 7539237 | Fast locking mechanism for channelized ultrawide-band communications A receiver for acquisition and lock of an impulse radio signal comprising an adjustable time base to output a sliding periodic timing signal having an adjustable repetition rate, and a decode timing modulator to output a decode signal in response to the periodic tim... | 05/26/2009 |
| 7529291 | Methods and structures for rapid code acquisition in spread spectrum communications Methods and structure for improved speed in pseudo-noise code acquisition. A receiver may include features to evaluate multiple potential pseudo-noise (PN) digital code sequences in parallel to more rapidly acquire the PN code utilized by a corresponding transmitter... | 05/05/2009 |
| 7529292 | 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 comm... | 05/05/2009 |
| 7526013 | Tag communications with access point A method of establishing communication at a tag includes calculating a metric for each of a plurality of automatic frequency control (AFC) hypotheses where the plurality of AFC hypotheses correspond to a timing used by an access point; based on the calculated metric... | 04/28/2009 |
| 7496132 | Pilot signals for synchronization and/or channel estimation The frame words of the embodiments are suitable for frame synchronization and/or channel estimation. By adding the autocorrelation and/or cross-correlation functions of frame words, double maximum values equal in magnitude and opposite polarity at zero and middle sh... | 02/24/2009 |
| 7480325 | Signal receiver for integrating and combining integrations in alternating time segments for signal acquisition at low signal strength A GPS receiver for integrating a GPS signal separately in a series of “A” type and “B” type time segments, the “A” segments alternating with the “B” time segments; combining the squares of the magnitudes of “A” time segment integrations correspon... | 01/20/2009 |
| 7466745 | Synchronizing PCM and pseudorandom clocks In a system having a received PN clock signal, a method is disclosed for providing a synchronized system clock signal having reduced jitter wherein the synchronized system clock signal is synchronized with the received PN clock signal. The method includes providing ... | 12/16/2008 |
| 7453926 | Bit synchronization detection methods and systems Methods and systems for detecting bit synchronization boundary in a received signal. A counter is set for defining a bit boundary of the received signal. Transitions in the received signal are detected and compared with the counter value as the transitions are expec... | 11/18/2008 |
| 7444144 | Initial cell search in wireless communication systems A method and system for performing initial cell search is disclosed. Step 1 processing is preformed to detect a peak primary synchronization code (PSC) location (i.e. chip offset or chip location). Step 2 processing is performed to obtain the toffset and ... | 10/28/2008 |
| 7433391 | Spread-spectrum receiver with fast M-sequence transform A receiving system dynamically searches a communications band for transmissions of messages having the same nominal communications parameters, including the use of the same spreading code, but having potentially different specific frequencies and code-phases. The re... | 10/07/2008 |
| 7428278 | Method and apparatus for parallel midamble cancellation Method and apparatus for performing midamble cancellation to remove midamble interference from the convolution tail of data field 1 and the first W-1 chips of the midamble field which results from the delay spread of the multipath channel and for canceling the first... | 09/23/2008 |
| 7421013 | Maximum likelihood estimation of time and frequency offset for OFDM systems A receiver in an OFDM system may include a joint maximum likelihood (ML) estimator that estimates both time offset and frequency offset. The estimator may use samples in an observation window to estimate the time offset and frequency offset. ... | 09/02/2008 |
| 7415354 | System and method for GPS acquisition using advanced tight coupling A system and method for GPS acquisition in relatively high interference is described. Acquisition is aided by an Advanced Tightly Coupled (ATC) tracking filters that compute a satellite range residuals and range rate residuals for satellites being acquired. Multiple... | 08/19/2008 |
| 7412013 | Start-up automatic frequency control (AFC) method and apparatus A method and apparatus for use in connection with wireless communication to adjust the frequency of an oscillator to synchronize with a received signal by correlating a synchronization code channel with training sequences to estimate positive and negative offsets wh... | 08/12/2008 |
| 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 |
| 7406113 | Integrated circuit for code acquisition A semiconductor integrated circuit for processing a plurality of received broadcast signals, such as GPS signals, is operable in two modes: acquisition and tracking. In an acquisition mode, sample reducer combines samples of a received signal for correlation with a ... | 07/29/2008 |
| 7406144 | Clock generator circuit using phase modulation technology and method thereof A clock generator circuit, comprising: a multi-phase clock signal generator for generating a plurality of clock signals having a same frequency but difference phases according to a reference clock signal; a modulation device for generating a phase modulation signal ... | 07/29/2008 |
| 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 |
| 7403558 | Integrated circuit for code acquisition A semiconductor integrated circuit for processing a plurality of received broadcast signals, such as GPS signals, is operable in two modes: acquisition and tracking. In an acquisition mode, a memory arrangement comprising two circulating shift registers circulates s... | 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 |
| 7398287 | Fast linear feedback shift register engine A method of generating a pseudo-noise sequence without masking a linear feedback shift register (LFSR) generator is provided. An offset pseudo-noise sequence is generated at a desired offset from a reference psuedo-noise sequence by determining a corresponding initi... | 07/08/2008 |
| 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 |
| 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 |
| 7382822 | Code acquisition device and method using two-step search process in DS-CDMA UWB modem There is provided a code acquisition device and method using a two-step search process in a DS-CDMA UWB modem. The device includes: an I/Q channel symbol generating unit for, generating a plurality (i) of nth I/Q channel symbols in a first search process ... | 06/03/2008 |
| 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 |
| 7372896 | Iterative detection and decoding for a MIMO-OFDM system Techniques to iteratively detect and decode data transmitted in a wireless (e.g., MIMO-OFDM) communication system. The iterative detection and decoding is performed by iteratively passing soft (multi-bit) “a priori” information between a detector and a decoder. ... | 05/13/2008 |
| 7372892 | 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... | 05/13/2008 |
| 7372888 | Method and apparatus for software reconfigurable communication transmission/reception and navigation signal reception The method and device performs spread spectrum based communication and/or navigation. Device embodiments may include a receiver having a plurality of programmable tracking units and a processor in communication with the receiver to control the device, such as reconf... | 05/13/2008 |
| 7369534 | Reducing search time using known scrambling code offsets Techniques for reducing search time using known scrambling code offsets are disclosed. In one embodiment, a plurality of search results is generated by correlating a received signal with a synchronization sequence. The plurality of search results is reduced by remov... | 05/06/2008 |
| 7369577 | Code group acquisition procedure for a UMTS-FDD receiver Step 2 demodulation is conventionally performed using a secondary synchronization channel that correlates a received signal at a known time slot location against each of a plurality of sequences associated with the secondary synchronization code. The disclosed imple... | 05/06/2008 |
| 7366243 | Methods and apparatus for transmitting non-contiguous spread spectrum signals for communications and navigation A technique for transmitting a spread spectrum signal using plural non-contiguous frequency bands separated by segments of frequency spectrum excluded from use involves: generating a digital time-domain spread spectrum signal; converting the time-domain signal to a ... | 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 |
| RE40253 | Apparatus for making a random access to the reverse common channel of a base station in CDMA and method therefor An apparatus for making a plurality of terminals have a random access to the reverse common channel system in CDMA, comprises code synchronization detection information broadcast means provided in the base station for broadcasting the state information of a channel ... | 04/22/2008 |
| 7362795 | Method and apparatus for acquisition and tracking of GPS satellites at low signal to noise levels A method of acquisition a signal having a low signal to noise ratio (SNR). The method comprises the steps of: (A) detecting a non-zero power in the signal having the low SNR during a power detect process; (B) receiving the signal having the low SNR by using a signal... | 04/22/2008 |
| 7362812 | Channel tracking using step size based on norm-1 based errors across multiple OFDM symbols A channel tracking module, configured for generating updated equalization coefficients for a frequency equalizer, is configured for determining a digital-based error value between equalized signals output by the frequency equalizer relative to predicted signals, for... | 04/22/2008 |
| 7362840 | Circuit and method for adjusting timing alignment using programmable codes A method is provided for adjusting timing alignment in which a receiver generates a plurality of imbalanced correction codes (1310), and square waves both having the same frequency. The receiver mixes the imbalanced correction codes with the square waves to c... | 04/22/2008 |
| 7359469 | Signal delaying device and method for dynamic delaying of a digitally sampled signal A signal delaying device (1) for the dynamic delaying of a digitally sampled input signal comprises a memory element (2) and a series-connected interpolation element (3). According to the invention, a register (30), which can be connected... | 04/15/2008 |
| 7359429 | Support of the determination of a correlation A method for supporting a determination of the correlation between at least one received code modulated signal and at least one available replica code is shown. In order to reduce the total memory size required for such correlations, the method comprises storing sig... | 04/15/2008 |
| 7356094 | Digital broadcast receiving apparatus A digital broadcast receiving apparatus for receiving a broadcast signal generated by combining sub signals modulated using a random sequence generated based on an initial value set in accordance with a frequency of a broadcast channel by a signal transmission contr... | 04/08/2008 |
