Patents for H04L 27 - Modulated-carrier systems (89,721)
05/2005
05/12/2005US20050099988 Method of idle mode control in OFDM system
05/12/2005US20050099975 System and method of dynamically optimizing a transmission mode of wirelessly transmitted information
05/12/2005US20050099939 Apparatus and method for transmitting/receiving pilot signals in an OFDM communication system
05/12/2005US20050099937 Apparatus and method for sub-carrier allocation in a multiple-input and multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system
05/12/2005US20050099936 OFDM transmitter and OFDM receiver
05/12/2005DE29825142U1 Telekommunikationssystem zur Bereitstellung von Schmalband- und Breitbanddiensten für Teilnehmer Telecommunications system for providing narrowband and broadband services to subscribers
05/12/2005DE29522448U1 Allocating data elements to set of carriers in OFDM system - dividing carriers into subsets of carriers according to predetermined criterion whilst data elements are classified into groups of data elements according to predetermined data criterion
05/12/2005DE10242637B4 Verfahren und Vorrichtung in einem Kommunikationssystem zum empfängerseitigen Bestimmen einer senderseitig verwendeten Modulation bei adaptiver Modulation Method and apparatus in a communication system for determining a receiver-side modulation at the transmitter end used in adaptive modulation
05/12/2005CA2539495A1 Gmsk spread modulation
05/11/2005EP1530391A1 Method for planning cells and method for scanning a power of a neighbor base stations in broadband wireless access communication system
05/11/2005EP1530336A1 Synchronization preamble structure for OFDM system
05/11/2005EP1530335A2 Apparatus and method for cancelling interference signal in an orthogonal frequency division multiplexing system using multiple antenna
05/11/2005EP1530334A2 Frequency error detector and combiner in a receiver of a mobile communication system
05/11/2005EP1530333A1 Method for channel estimation in a MIMO OFDM system
05/11/2005EP1530319A2 Method of idle mode control in OFDM system
05/11/2005EP1530312A1 Apparatus and method for cancelling interference signals in a system using multiple antennas
05/11/2005EP1530302A2 Cdma system which uses pre-rotation before transmission
05/11/2005EP1530301A2 Cdma system which uses pre-rotation before transmission
05/11/2005EP1530300A1 Method and apparatus for equalisation in a receiver of a cdma communications system
05/11/2005EP1529389A1 Symbol interleaving
05/11/2005EP1529388A1 Differential decoder followed by non-linear compensator
05/11/2005EP1529350A1 Pilot symbols in communication systems
05/11/2005EP1529347A1 Method and apparatus for layered modulation
05/11/2005EP1468497A4 Multi; stage code generator and decoder for communication systems
05/11/2005EP1163771B1 Synchronous bpsk decoder
05/11/2005EP0927472B1 Component timing recovery system for qam
05/11/2005CN2699605Y High speed downlink packet access (HSDPA) user equipment having physical layer ARQ (automatic repeat request) mechanism
05/11/2005CN1615625A Radio reception apparatus, signal processing timing control method, and signal processing timing control program
05/11/2005CN1615624A Rate selection for an OFDM system
05/11/2005CN1615623A Rate selection for an OFDM system
05/11/2005CN1615622A Method and apparatus for determining the log-likelihood ratio with precoding
05/11/2005CN1615621A Radio reception apparatus, symbol timing control method, and symbol timing control program
05/11/2005CN1614964A Method for global digital broadcasting based on differential amplitude and phase combining modulation
05/11/2005CN1614963A Timing locking test method for QAM and PSK signal
05/11/2005CN1614962A Phase shifting key controlled transmitter for UMB communication system and corresponding receiver
05/11/2005CN1614919A DSL system for transferring mixed DSL signals through user access wire
05/11/2005CN1614914A Spare mode cotrol in orthogonal FDM system
05/11/2005CN1614899A Frequency error detector and combiner in a receiver of a mobile communication system
05/11/2005CN1614878A Locking-phase loop style orthogonal signal phase calibrator
05/11/2005CN1201617C Automatic frequency control circuit and method
05/11/2005CN1201538C Receiver, demodulator and demodulation method therefor
05/11/2005CN1201537C Method and apparatus for implementing training phase of adaptive channel equalization on digital communications path
05/11/2005CN1201518C Pilot mode design for STTD program in OFDM system
05/11/2005CN1201515C Control device and method of automatic frequency control in mobile communication equipment
05/10/2005US6892341 Data transmission apparatus using a constellation rearrangement
05/10/2005US6892339 Discrete multi-tone (DMT) system and method that communicates a data pump data stream between a general purpose CPU and a DSP via a buffering scheme
05/10/2005US6891908 Portable radio system and portable radio equipment to be used in the same and frequency error prediction method used therefor
05/10/2005US6891907 Frequency offset correction system and correction method
05/10/2005US6891905 Apparatus and method for FSK demodulation with integrated time and frequency tracking
05/10/2005US6891904 Modulation signal analysis apparatus
05/10/2005US6891902 System and method for adjusting a power level of a transmission signal
05/10/2005US6891898 System and method for recovering symbol timing offset and carrier frequency error in an OFDM digital audio broadcast system
05/10/2005US6891896 Embedded signal constellations
05/10/2005US6891887 Multi-carrier LAN adapter device using interpolative equalizer
05/10/2005US6891882 Receiver algorithm for the length 4 CFC
05/10/2005US6891810 Wireless access system and associated method using multiple modulation formats in TDD frames according to subscriber service type
05/10/2005US6891809 Background communication using shadow of audio signal
05/10/2005US6891796 Transmitting data in a power line network using link quality assessment
05/10/2005US6891792 Method for estimating time and frequency offset in an OFDM system
05/10/2005US6891445 Phase modulator
05/10/2005US6891440 Quadrature oscillator with phase error correction
05/10/2005CA2319726C Interleaving/deinterleaving device and method for communication system
05/10/2005CA2261824C Digital modulation system using extended code set
05/10/2005CA2212009C Radio tracking system and method of operation thereof
05/06/2005WO2005041571A1 Apparatus and method of on-channel repeater
05/06/2005WO2005041515A1 Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system
05/06/2005WO2005041514A1 Method for synchronisation on transmission of ofdm signals
05/06/2005WO2005041513A1 Symbol point estimating apparatus, method and program, and recording medium
05/06/2005WO2005041512A1 Method for estimating a frequency offset of a modulated bandpass signal
05/06/2005WO2005041508A1 Method for regulating a guard interval in data streams in digital radio transmission devices and corresponding radio receiver device
05/06/2005WO2005041458A1 Orthogonal frequency division multiplexing (ofdm) digital radio frequency (rf) transceiver
05/06/2005WO2005041457A1 Ofdm transmitter/receiver apparatus
05/06/2005WO2005041452A1 Method and apparatus for transmission and reception within an ofdm communication system
05/06/2005WO2005041448A1 Downlink signal configuring method and device in mobile communication system, and synchronization and cell searching method and device using the same
05/06/2005WO2005041441A1 Apparatus and method for cyclic delay diversity
05/06/2005WO2005041408A1 Digital rf transceiver with multiple imaging modes
05/06/2005WO2005027353A3 Hybrid frequency offset estimator
05/06/2005WO2004112235A3 Method and system for transmitting signals with reduced spurious emissions
05/06/2005WO2004088902A3 Method and apparatus for mitigating the effects of non-ideal receiver processing
05/06/2005WO2004056022A3 Apparatus and method for signal constitution for downlink of ofdma-based cellular system
05/05/2005US20050097617 Ranging and registering cable modems under attenuated transmission conditions
05/05/2005US20050097427 Method of and device for communication
05/05/2005US20050097425 Data transmission apparatus using a constellation rearrangement
05/05/2005US20050097424 Data transmission apparatus using a constellation rearrangement
05/05/2005US20050095998 Tunable matching circuit
05/05/2005US20050095002 Data transmitter and method of generating none return to zero optical signal with clock component amplification
05/05/2005US20050094838 Electronic device with wireless communication module
05/05/2005US20050094750 Demodulation apparatus and method for reducing time delay of on-channel repeater in terrestrial digital TV broadcasting system
05/05/2005US20050094749 Non-binary viterbi data processing system and method
05/05/2005US20050094746 Characteristic measurement system for a digital modulation signal transmission circuit
05/05/2005US20050094745 Ask demodulation device and wireless device using the same
05/05/2005US20050094744 Multi-mode receiver
05/05/2005US20050094743 System and method for an improved quadrature upconverter for I/Q modulation using intermediate frequency carriers
05/05/2005US20050094739 Method and detecting carrier shift amount in digital transmission signal, method of correcting carrier shift amount, and receiver employing these methods
05/05/2005US20050094738 Channel condition estimation for pilot coefficient selection
05/05/2005US20050094718 Wideband digital radio with transmit modulation cancellation
05/05/2005US20050094717 Modulation apparatus for reducing time delay of on-channel repeater in terrestrial digital TV broadcasting system
05/05/2005US20050094714 Multi-carrier transceiver assembly
05/05/2005US20050094711 GMSK spread modulation
05/05/2005US20050094613 Apparatus and method for transmitting/receiving a pilot signal for distinguishing a base station in a communication system using an OFDM scheme