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| Number | Title | Issue Date |
| 8189646 | Spread spectrum signal A spread-spectrum signal comprises a spreading waveform modulating a carrier wave and containing a real linear combination of a first waveform at a first waveform rate and a second waveform at a second waveform rate, the first waveform rate being distinct from the s... | 05/29/2012 |
| 8175134 | Radio communications system and method having decreased capability for detection by an adversary Decreased capability for detection of communications signals by an adversary is provided by applying frequency hopping, frequency chirping, and direct sequence spreading to the signals. The frequency hopping and frequency chirping can be driven by pseudo random func... | 05/08/2012 |
| 8130815 | Method for generating a reference signal sequence using grouping Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in t... | 03/06/2012 |
| 8130814 | Orthogonal code division multiplex CCK (OCDM-CCK) method and apparatus for high data rate wireless LAN Orthogonal Code Division Multiplexing (OCDM) transceiver system with Complementary Code Keying (CCK) and method for baseband OCDM-CCK encoding and decoding are provided. The OCDM-CCK method comprises a serial-to-parallel data converter converting a stream of M*n-bit... | 03/06/2012 |
| 8126029 | Voice interference correction for mixed voice and spread spectrum data signaling A method, a process and an audio system for embedding bit stream in a voice signal is disclosed. A voice/data interference signal is composed and supplied to the mixer of the voice signal and the data signal such that the resulting mixed signal effectively cancels t... | 02/28/2012 |
| 8121173 | Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communicating system A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data ... | 02/21/2012 |
| 8111733 | Method for generating a reference signal sequence using grouping Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in t... | 02/07/2012 |
| 8111732 | Method for generating a reference signal sequence using grouping Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in t... | 02/07/2012 |
| 8094699 | Methods and systems for demodulating a multiuser signal using channel decoders for a multiple-access communication system Methods and systems for demodulating a multiuser signal using channel decoders for a multiple-access communication system are disclosed. According to one method, a signal containing information for a plurality of users in a multiple-access communication system emplo... | 01/10/2012 |
| 8090003 | Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data ... | 01/03/2012 |
| 8054865 | Methods and apparatus for masking and securing communications transmissions A secure information transmission system includes one or more transmitters and one or more receivers. The transmission waveform employed includes highly randomized, independent stochastic processes, and is secured as a separate entity from the information it carries... | 11/08/2011 |
| 7991040 | Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal. In an aspect, a method is provided for reducing a peak to average ratio of a transmit waveform. The method includes obtaining a primary scrambler sequence, generating a secon... | 08/02/2011 |
| 7957452 | Direct sequence spread spectrum transceiver A direct sequence spread spectrum (DSSS) transceiver including a DSSS transmitter and a DSSS receiver, wherein the DSSS transmitter includes: an integral code mapping unit mapping source bit data in one of 2N (N is a natural number) of predetermined symbo... | 06/07/2011 |
| 7949032 | Methods and apparatus for masking and securing communications transmissions A secure information transmission system includes one or more transmitters and one or more receivers. The transmission waveform employed includes highly randomized, independent stochastic processes, and is secured as a separate entity from the information it carries... | 05/24/2011 |
| 7949033 | Method for generating a reference signal sequence using grouping Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in t... | 05/24/2011 |
| 7916770 | Method of generating spreading codes, CDMA transmission apparatus, and CDMA reception apparatus ej(2nπ/N) calculating section 101 generates a bth chip C(a,b) of an ath spreading code based on C(a,b)=ej(2nπ/N) where e is a base of natural logarithm and N is a length of the spreading code (i.e. spreading code length). It is assumed... | 03/29/2011 |
| 7912112 | Spectrum spreading circuit A spectrum spreading circuit, includes a control portion that repeats a sequence in which the control portion generates a designation signal for designating all of plural frequencies in prescribed order by selecting a next frequency from the frequencies which have n... | 03/22/2011 |
| 7903719 | Optimal use of resources for signal processors Systems, methods and devices for signal processing are presented. In particular, methods for the detection of signals in CDMA-based systems are presented, together with corresponding devices. These methods provide more efficient use of correlation resources through ... | 03/08/2011 |
| 7894504 | Coherent and non-coherent hybrid direct sequence/frequency hopping spread spectrum systems with high power and bandwidth efficiency and methods thereof A hybrid spread spectrum system includes a signal combiner for (a) receiving a plurality of spread spectrum encoded data signals and (b) forming a plurality of combined signals. A first set of mixers is included for (a) receiving the plurality of combined signals an... | 02/22/2011 |
| 7889778 | Device for detecting an attack against an integrated circuit chip A circuit for detecting attacks by contacting an integrated circuit chip comprising means for applying a random signal to a first terminal of at least one conductive path formed in at least one first metallization level of the chip, means for comparing the applied s... | 02/15/2011 |
| 7876808 | Method and apparatus for adaptive noise and/or signal filtering in an HSDPA channel quality indicator (CQI) selection Methods and systems for processing signals in a wireless communication system are disclosed. Aspects of the method may include estimating at a receiver, a rate at which a communication channel changes. A length of a filter used to average a noise power estimate and/... | 01/25/2011 |
| 7864832 | Multi-code correlation architecture for use in software-defined radio systems A reconfigurable multi-code correlation unit for correlating a sequence of chip samples comprising 1) a memory for storing the chip samples; 2) a plurality of add-subtract cells, each add-subtract cell receiving a plurality of real bits, a, and a plurality of imagin... | 01/04/2011 |
| 7839915 | Reception of a spread spectrum modulated signal The present invention relates to a receiver for receiving a spread spectrum modulated signal, comprising a sampler for forming samples of a received signal, at least one reference code block for generating at least first and second reference codes, and a correlation... | 11/23/2010 |
| 7830948 | Asynchronous communication system for remote monitoring of objects or an environment A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be ... | 11/09/2010 |
| 7826514 | Radio transmitter-receiving apparatus and radio transmitting-receiving method for estimating noise and interference power in radio transmission using code spread A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater... | 11/02/2010 |
| 7817707 | Apparatus and method for generating ranging pseudo noise code Disclosed is an apparatus for generating a ranging pseudo noise (PN) code used in a base station of a portable internet system of an orthogonal frequency division multiplexing access scheme, wherein a ranging pseudo noise mask value is generated using a cell ID numb... | 10/19/2010 |
| 7769075 | Method and apparatus for channel estimation using time-frequency localized pilots and de-noising techniques A method and apparatus for performing channel estimation using time-frequency localized pilots and de-noising techniques are disclosed. A transmitter sends pilot symbols which are localized in a joint time-frequency domain to a receiver for channel estimation. The r... | 08/03/2010 |
| 7764725 | Sub-banded ultra-wideband communication system A wireless communication system performs high-speed transmission of information signals by using a multi-band approach. Each band spans about 500MHz. A flexible modulation scheme within each band employs time, amplitude and phase modulations, allowing adaptation of ... | 07/27/2010 |
| 7760792 | Spread spectrum electromagnetic signals An assembly of simultaneously transmitted electrically generated signals, which contains a subset of binary spreading-code sequences that are members of a larger set of binary spreading-code sequences available to a particular node of a multi-node communication netw... | 07/20/2010 |
| 7738530 | Interference suppression for partial usage of subchannels uplink Disclosed are a method, information processing system and wireless communications device for suppressing interference. The method includes receiving a transmission from each of a target (104) and interfering device (106). A set of pilot sequences (6... | 06/15/2010 |
| 7706427 | Method and apparatus for compact OVSF despreading A despreader for generating one or more despread values corresponding to application of one or more despreading codes to a sequence of spread values comprises a data buffer, an adder, a subtractor, and a controller. The adder is adapted to generate a sum of a pair o... | 04/27/2010 |
| 7693208 | Method and circuit for limiting the power of a signal compiled from spread-coded signals The method is used for limiting the power of a transmission-end signal (xn) compiled from a plurality of differently spread-coded signals. In this context, it is assumed that the quantity of spread codes used for the differently spread-coded signals is kn... | 04/06/2010 |
| 7653119 | Extending orthogonal frequency division multiplexed wireless local area networks using direct sequence spread spectrum/complementary code keying In various embodiments, the present invention includes a method for direct spread modulating data for wireless transmission at a 5 Gigahertz band or other frequency bands via wireless devices. Such wireless transmissions may occur in a wireless network having protec... | 01/26/2010 |
| 7643535 | Compatible preparation and detection of preambles of direct sequence spread spectrum (DSSS) and narrow band signals The preambles of narrow band signals and DSSS signals are prepared for compatible detection. The preamble is encoded by encoding a sequence of identical preamble blocks with sequentially corresponding code elements of a preamble encoding sequence. Each of the identi... | 01/05/2010 |
| 7596168 | Diversity receiving apparatus, controlling method of the same, and computer-readable medium containing program therefor A diversity receiving apparatus receives first and second reception signals and is constituted by including one or more phase shifters that generate one or more third signals having phases different from the second reception signal based on the second reception sign... | 09/29/2009 |
| 7586973 | Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data ... | 09/08/2009 |
| 7542505 | Systems and methods for signal conversion Systems and methods for signal conversion are provided. Signals are spread in a continuous spectrum by a spread spectrum signal, such as a direct sequence spread spectrum (DS-SS) signal. The signals are then processed, which may include but is not limited to analog-... | 06/02/2009 |
| 7526010 | Doped multi-rate spread spectrum composite code A composite code is made for example by exclusive-OR'ing each real element of a first constituent code A with each element of a second constituent code B to obtain a basic composite code. To suppress autocorrelation, differing numbers of doping code elements are ins... | 04/28/2009 |
| 7519101 | Method and apparatus for using empty time slots for spread spectrum encoding Communication circuitry uses a combination of Pseudo-Noise (PN) coded and non-PN coded transmission periods to represent different data values. In one embodiment, a number of data values are encoded into a smaller second number of encoded ternary values. The Pseudo-... | 04/14/2009 |
| 7502406 | Automatic power control system for a code division multiple access (CDMA) communications system A receiver receives signals and noise over a frequency spectrum of a desired received signal. The desired received signal is spread using code division multiple access. The received signals and noise are demodulated to produce a demodulated signal. The demodulated s... | 03/10/2009 |
