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| Number | Title | Issue Date |
| 8165185 | Physical layer data unit format In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, wherein the first format includes a short training field (STF) spread with a first spread code and a first cover code, a method... | 04/24/2012 |
| 8102895 | Radio transmission apparatus, radio reception apparatus, transceiver, and radio communication method A radio transmission apparatus that uses a plurality of band groups and that transmits a signal subjected to frequency hopping between a plurality of bands in each band group at a local frequency apart from the center frequency of each band includes a local frequenc... | 01/24/2012 |
| 8014435 | System and method using high performance preamble cover sequences for multi-band OFDM two-band hopping modes Methods and systems for packet preamble sequences are provided. The preamble sequences are produce by multiplying preestablished base sequences by cover sequences. The cover sequences are chosen for high-performance in multi-band OFDM systems with modes that include... | 09/06/2011 |
| 7953136 | Transmission circuit and system for the same According to the present invention, there is provided a transmission circuit transmitting a power signal using frequency hopping system from an antenna connected to the transmission circuit through a transmission path, the transmission circuit including: a controlle... | 05/31/2011 |
| 7936806 | Method and apparatus for multiplexing frequency hopping in a communication system A method and apparatus for multiplexing frequency hopping in a wireless communication system using Orthogonal Frequency Division Multiple Access (OFDMA) is provided. The frequency hopping multiplexing method and apparatus efficiently indicates time division multiple... | 05/03/2011 |
| 7936805 | Transmitter and frequency hopping method of the same Provided are a transmitter and a frequency hopping method thereof. The transmitter includes: a channel encoder outputting a bit stream of encoded information data; a symbol mapper outputting a symbol stream obtained by constellating the bit stream; a frequency alloc... | 05/03/2011 |
| 7860149 | Methods and apparatus for flexible hopping in a multiple-access communication network Techniques for efficiently designing random hopping patterns in a communications system are disclosed. The disclosed embodiments provide for methods and systems for generating random hopping patterns, updating the patterns frequently, generating different patterns f... | 12/28/2010 |
| 7860150 | Apparatus, method, and computer program product providing improved uplink pilot transmission schemes In one non-limiting aspect thereof, the exemplary embodiments of this invention provide a user equipment that includes a data processor; and a wireless transceiver configured to transmit uplink pilot signals during sub-bands and slots, wherein at least three blocks ... | 12/28/2010 |
| 7848386 | Frequency hopping RF transceiver with programmable antenna and methods for use therewith A (radio frequency) RF transmission system includes an RF transmitter that generates an RF signal at a sequence of selected carrier frequencies. A frequency hop module, coupled to the RF transmitter generates the sequence of selected carrier frequencies. A programma... | 12/07/2010 |
| 7773660 | Frequency channel selection in a data transmission method which uses a frequency hopping method Frequency channel selection in a data transmission method uses a frequency hopping method. In a first method step, interference in a frequency channel is determined by detecting multiple erroneous transmissions in the frequency channel, and the frequency channel wit... | 08/10/2010 |
| 7646800 | Method and apparatus for allocating subcarriers in a broadband wireless communications system using multiple carriers A method and apparatus for allocating subcarriers in a broadband wireless communication system using multiple carriers are provided. In the wireless communication system where the total available frequency band is divided into a plurality of subcarriers and subchann... | 01/12/2010 |
| 7639728 | Methods for generating and transmitting frequency hopped signals Methods and apparatus for generating and transmitting frequency division multiplexed signals are described. The methods are well suited for use where a device uses a small subset, M, of a larger set of N subcarrier frequencies at any given time. Each transmitted FDM... | 12/29/2009 |
| 7599418 | Method and apparatus for a frequency hopper A method and system for generating a frequency hopping electromagnetic signal based on a baseband data signal includes a frequency hopping pre-compensator. The frequency hopping pre-compensator determines a frequency hopping pre-compensation signal based on a desire... | 10/06/2009 |
| 7443827 | Mobile communication system, multicarrier CDMA transmitter, and multicarrier CDMA receiver A transmitting apparatus adds a common pilot symbol and known series for each data slot of a subcarrier group. A receiving apparatus combines SIR calculation values obtained for each subcarrier group, and averages the SIR calculation values. Based on this, it is pos... | 10/28/2008 |
| 7443917 | Method and system for transmission of information data over a communication line A transceiver system and method comprises a transmitter and a receiver. The transmitter includes a synthesis filter bank and an overlapping unit. The synthesis filter bank generates and modulates a set of wavelets. The overlapping unit generates a multicarrier signa... | 10/28/2008 |
| 7439813 | Method and system for generating carrier frequencies for UWB application Apparatus and method for generating first, second and third carrier frequencies of 3432 MHz, 3960 MHz and 4488 MHz respectively, for use in a wireless transmission system deploy only first and second PLLs which are configured to generate 6336 MHz and 2640 MHz signal... | 10/21/2008 |
| 7440486 | Noise shaping technique for spread spectrum communications A spread spectrum noise shaper uses a modulation technique to achieve a greater signal-to-noise or signal-to-interference ratio (SNR or SIR). The technique doubles the system SIR, in principle. This doubling yields a doubling in system capacity. SNR is increased by ... | 10/21/2008 |
| 7440484 | Reduced hopping sequences for a frequency hopping system A frequency hopping system such as a Bluetooth system (300) can reduce the number of RF channels it hops during a normal hopping sequence cycle providing for a Reduced Hopping Sequence (RHS). A communication unit operating in the system such as the Bluetooth ... | 10/21/2008 |
| 7430232 | Method and system for broadcasting a programme Method and apparatuses for broadcasting and receiving a programme are presented. A programme is broadcast from a broadcasting system. Broadcast programme-associated data is transferred from a server to a cellular radio network. The broadcast programme-associated dat... | 09/30/2008 |
| 7426386 | Beam laydown for hopped satellite downlink with adaptable duty cycle A power gated variable hop cycle beam laydown (700) manifests itself as first cells (C, D) supported by a first hop cycle, second cells (G, H) supported by a second hop cycle, and transition cells (E, F) supported by a transition hop cycle. The transition hop... | 09/16/2008 |
| 7418067 | Processing diversity signals at a mobile device using phase adjustments Processing diversity signals includes receiving diversity signals at a number of antennas. The diversity signals have communicated information, and the antennas are associated with channel paths. A phase of at least one diversity signal is adjusted. The diversity si... | 08/26/2008 |
| 7411899 | Apparatus and method for allocating walsh codes to access terminals in an adaptive antenna array CDMA wireless network An apparatus having: 1) a database for storing R active wireless terminal records, each of the R active wireless terminal records containing: a) an active orthogonal code and b) corresponding downlink beamforming coefficients used to communicate with one of the wire... | 08/12/2008 |
| 7403746 | Adaptive frame durations for time-hopped impulse radio systems A method determines a duration of a frame in an impulse radio system for radio ranging. Channel state information of a channel between two transceivers is estimated periodically. A signal to noise and interference ratio is also estimated periodically. The frame dura... | 07/22/2008 |
| 7400867 | Radio broadcast receiver A radio broadcast receiver is provided which reduces the degradation in quality of diversity-received signals. When a difference in level between a reception signal of a main antenna and a reception signal of a sub antenna is less than a predetermined threshold valu... | 07/15/2008 |
| 7397859 | Multi-carrier communication systems employing variable symbol rates and number of carriers A multi-carrier communication system such as an OFDM or DMT system has nodes which are allowed to dynamically change their receive and transmit symbol rates, and the number of carriers within their signals. Changing of the symbol rate is done by changing the clockin... | 07/08/2008 |
| 7394844 | Code division multiple access employing orthogonal filter banks Wavelet filters computed from a wavelet transform are used for encoding, transmitting, receiving, and decoding spread spectrum signals on multiple parallel frequency channels. The transmitter encodes the data stream via a mapping to a basis set of wavelets which are... | 07/01/2008 |
| 7388900 | Estimation method for space correlation characteristics of noise in a time slotted CDMA system The invention discloses a method for estimating the space correlation characteristics of noise in a time slotted CDMA system. The method comprises the steps of: making channel estimation for the received signal of each antenna of an antenna array, respectively, to o... | 06/17/2008 |
| 7373107 | Ultra-wideband wireless backplane A backplane for an electronic data communication system is disclosed. The backplane comprises at least one ultra-wideband transmitter configured to transmit data in the form of a plurality of pulses in a wireless manner and at least one ultra-wideband receiver confi... | 05/13/2008 |
| 7372891 | Signal generator and decoder A signal generator and decoder are used for a single sideband spread spectrum signal. A single sideband spread spectrum signal generator and decoder in which single sideband modulation using a complex spreading code is achieved with improved correlation properties, ... | 05/13/2008 |
| 7359366 | Uplink ranging system and method in OFDMA system Disclosed is a ranging system and method in an OFDMA system. The ranging system includes complex exponential twiddle storage units for respectively storing complex exponential twiddle factors corresponding to a timing error, complex multipliers for respectively comp... | 04/15/2008 |
| 7359456 | Communication system and communication device A communication system for transmitting a transmission signal in digital form from a transmitter to a receiver is disclosed. The transmitter includes a modulation part modulating a carrier wave in accordance with the transmission signal according to frequency modula... | 04/15/2008 |
| 7356104 | Radio communication apparatus and interference avoiding method A radio communication apparatus and method employs frequency hopping in a predetermined pattern based on a hopping carrier table. An intermittent receiving section activates a carrier frequency designating section every constant cycle to give a command for receiving... | 04/08/2008 |
| 7349540 | Generation of user equipment identification specific scrambling code for high speed shared control channel A user equipment is used in a code division multiple access communication system. The user equipment comprises circuitry configured to process a user equipment identification (UE ID) by ½ rate convolutionally encoding the UE ID to produce a code. The code is used b... | 03/25/2008 |
| 7346094 | System and method for transmitting data and additional information simultaneously within a wire based communication system A system and method is provided for transmitting data signals and additional information signals having partially overlapping frequency bands simultaneously within a wire based communication system over the same wired medium using a spread spectrum technique for mod... | 03/18/2008 |
| 7346070 | Shared wireline code division multiple access A first network component of an apparatus in one example is coupled with one or more additional network components. The first network component and the one or more additional network components communicate with one another over a single, shared wireline path through... | 03/18/2008 |
| 7340001 | Multidimensional signal modulation and/or demodulation for data communications Systems and methods are described for multidimensional signal modulation and/or demodulation for data communications. A method includes modulating a carrier signal in a first domain selected from the group consisting of phase, frequency, amplitude, polarization and ... | 03/04/2008 |
| 7330504 | Method and apparatus for low power-rise power control using sliding-window-weighted QoS measurements A system and method for adjusting the power control target for a spread-spectrum communication system 110 is disclosed. A preferred embodiment comprises correcting a power control target 128 based upon the difference between a filtered series of actual... | 02/12/2008 |
| 7324578 | Method and apparatus for transmitting and receiving information about spreading codes used for a packet data channel in a communication system A method and apparatus for efficiently transmitting and receiving information about spreading codes used for a packet data-transmitting channel in a spread spectrum communication system. A BS determines Walsh codes for spreading a PDCH and transmits on a PDCCH an in... | 01/29/2008 |
| 7324582 | System and method for the directional reception and despreading of direct-sequence spread-spectrum signals A system (100) and method for the reception and despreading of a code-division multiple access (CDMA) global positioning system (GPS) signal (200), or other direct-sequence spread-spectrum (DSSS) signals, is provided. An antenna array (102) rece... | 01/29/2008 |
| 7319713 | Method of limiting signal, and transmitter The method comprises setting a threshold value, dividing the combined signal into blocks, comparing the values of each block with the set threshold value and if the threshold value is exceeded, decorrelating the block where the threshold value was exceeded and a pre... | 01/15/2008 |
