Matches 201 - 250 out of 444 < 1 2 3 4 5 6 7 8 9 >
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7161985 Method and device for transmitting data on at least one electrical power supply line  
The orthogonal frequency division multiplexing (OFDM) method is well-known for transmitting data on electrical power supply lines. According to this method, the items of information to be...
7158576 Orthogonally-multiplexed orthogonal amplitude modulation method  
An orthogonally-multiplexed orthogonally-amplitude-modulated (OMOAM) method is disclosed. The OMOAM signal is constituted by orthogonally multiplexing M component signals, each constructed by a...
7151478 Pseudo-orthogonal waveforms radar system, quadratic polyphase waveforms radar, and methods for locating targets  
In some pseudo-orthogonal waveform embodiments, a radar system transmits pseudo-orthogonal waveforms and performs multiple correlations on a combined single receiver channel signal. In some...
7145862 Method and apparatus for transmission and reception of data  
To address the need for reducing pilot overhead, a method and apparatus for transmitting and receiving data is provided herein. A communication system having a transmitter ( 100 ) that utilizes...
7139336 Method and system for channel estimation using iterative estimation and detection  
A method and system are directed to enabling a detector to perform relatively accurate channel estimates on blocks of data that include relatively short training sequences in wireless communication...
7136423 Side tones packets injection (STPI) for PAR reduction  
A method and system for reducing the power to average ratio (PAR) at the transmitter after the up sampling and interpolation filter. In the time domain, Side Tone Packets Injection (STPI) system...
7136418 Scalable and perceptually ranked signal coding and decoding  
A method and system for encoding and decoding an input signal in relation to the most perceptually relevant aspects of the input signal. A two-dimensional (2D) transform is applied to the input...
7133353 CDMA system using quasi-orthogonal codes  
A CDMA communication system uses a set of quasi-orthogonal codes to supplement the standard set of Walsh codes used in conventional systems. Users are assigned a code selected from the set of Walsh...
7123579 Method of transmitting non-orthogonal physical channels in the communications system  
A communications system and a method of transmitting physical channels in the communications system. A base station judges whether the orthogonality is effected among the physical channels before...
7113476 Interference cancellation method and receiver  
The invention relates to an interference cancellation method and a receiver including interference canceller for suppressing a narrow-band interference signal from a received signal, converter for...
7110349 Adaptive communications methods for multiple user packet radio wireless networks  
An exemplary wireless communication network that includes a base that communicates with remote units located in a cell of the network. A base concatenates information symbols with a preamble...
7106177 Method and system for modifying modulation of power line communications signals for maximizing data throughput rate  
Data throughput rate in a power line communications (“PLC”) system is controlled by generating PLC carrier signals in accordance with a PLC signal frame structure containing payload symbols...
7102993 Mobile station, base station, communication system, and communication method  
A mobile station, and corresponding system and method, the mobile station including an IQ multiplexer configured to IQ multiplex transmission data for data channels, control data for a control...
7103106 System and method for generating a modified IOTA pulse for reducing adjacent channel interference (ACI) in an isotropic orthogonal transfer algorithm (IOTA) orthogonal frequency division multiplexing (OFDM) system  
An improved multicarrier modulation system and method, which has the advantages of both isotropic orthogonal transfer algorithm orthogonal frequency division multiplexing (IOTA OFDM) and scalable...
7099265 OFDM communication system and transmitter-receiver for use in the system  
A diversity OFDM communication is performed between a base terminal and a mobile terminal, both having a horizontal polarization antenna and a vertical polarization antenna forming two transmission...
7099266 Orthogonal frequency division multiplexed signal transmitting apparatus, orthogonal frequency division multiplexed signal receiving apparatus, and orthogonal frequency division multiplexed signal transmitting/receiving system  
An orthogonal frequency division multiplexed signal transmitting apparatus executes a time-division multiplexing process that inserts a reference signal at a predetermined interval based on...
7092440 Hybrid spread-spectrum technique for expanding channel capacity  
Methods, systems and devices are described for a direct-sequence spread-spectrum communication scheme that increases the number of users by utilizing a plurality of closely spaced orthogonal...
7088671 Multiple access technique for downlink multibeam digital radio systems  
A multiple access communication system with communication links between one or more central nodes each with a transmitter 1 including an antenna with one or more antenna beams, and user terminals...
7079824 Reception of multicarrier spread-spectrum signals  
A system ( 100 ), receiver ( 160 - 190 ) and method of operation for spread OFDM wireless communication (single user OFDM-CDMA with cyclic-prefix) by: equalizing the received spread OFDM signal (y)...
7072324 Device and method for providing time switched transmission diversity in mobile communication system  
The invention provides a method and apparatus for transmitting signalling information to a receiver using a plurality of transmission antennas in a time switching configuration. The apparatus...
7068592 System and method for increasing payload capacity by clustering unloaded bins in a data transmission system  
A system and method for increasing payload in a data transmission system. In architecture, the system comprises a modulation device configured to modulate data bins to produce bin-clusters, a...
7068703 Frequency hop sequences for multi-band communication systems  
Techniques to generate FH sequences having excellent correlation properties and to use these FH sequences in multi-band communication systems (e.g., OFDM systems). In one aspect, FH sequences may...
7065378 Optimal use of request access TDMA slots for automatic level control  
Systems and methods for controlling subscriber unit power level using power measurements made on access request transmissions. Since a subscriber unit access request typically precedes a subscriber...
7058003 Hand-off processing apparatus and method for telecommunication system  
In an apparatus and method for performing a hand-off in a mobile communication system, a mobile terminal and two base stations transmit and receive two different transmission signals produced from...
7058002 OFDM packet communication receiver  
In an OFDM packet communication receiver, the deterioration of received signal quality is suppressed, even when carrier frequency error and/or clock frequency error exists between a transmitter and...
7046617 Method and apparatus for an enhanced OFDM system  
A method and apparatus for communicating in an OFDM system whereby data subcarriers associated with a first antenna of at least two transmit antennas are multiplexed with data symbols while...
7039370 Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems  
Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit...
7039000 Timing synchronization for OFDM-based wireless networks  
Timing in a receiver is synchronized to an orthogonal frequency division multiplex (OFDM) signal transmitted over a channel. The OFDM signal includes multiple training symbols, including long and...
7031249 Outer code for CSMA systems using an OFDM physical layer in contention-free mode  
A coding scheme for use with a CSMA protocol to enable transmission of high data rate information signals thereover, wherein the protocol includes an OFDM physical layer, a MAC layer and a CSMA...
7027464 OFDM signal transmission scheme, and OFDM signal transmitter/receiver  
In an OFDM transmission scheme, in order to compensate any frequency response variations time wise resulted from any distortion in a transmission path, out-of-synchronization with passage of time,...
7023792 Transmitter for spread-spectrum communication  
A multiplexing timing signal generator ( 1 ) generates a multiplexing timing signal activated for each interval corresponding to a number of chips delayed in multiplexing between data to be...
7023897 Transmission circuit  
A transmission circuit includes a baseband circuit, spreading section, multiplier, digital modulator, quadrature modulator, and antenna. The baseband circuit generates and outputs at least one...
7020226 I/Q distortion compensation for the reception of OFDM signals  
A transmitter ( 102 ) generates a first set of data symbols and a first pilot symbol ( 601 ) at a first time, and a second set of data symbols and a second pilot symbol ( 602 ) at a different,...
7020069 Medium access control protocol for OFDM wireless networks  
A medium access contention protocol that is highly beneficial in wireless networks and particularly in wireless networks that employ a fixed minimum burst size such as OFDM wireless networks. In...
7012882 Channel estimator for OFDM system  
The present invention relates to a device ( 10 ) for receiving signals in a wireless orthogonal frequency division multiplex (OFDM) system and to a channel estimation method in such a system. The...
7010027 Multistandard discrete multi-tone (DMT) digital subscriber line (DSL) system  
A digital subscriber line transmission system using QAM modulation on several equally spaced discrete tones, uses, at a high transmission rate, N=2048/p or 4096/p tones spaced by 4.3125p KHz, where...
7009932 Frequency tracking device for a receiver of a multi-carrier communication system  
A frequency tracking device (FTD) in particular for use in a OFDM communication system comprises a selector (SEL) which selects on the basis of N channel coefficients (C est ) a number M of...
7006430 Receiver, receiving method, and recording medium which records program for receiving data signals  
A receiving section outputs a received signal. An estimation section estimates transmission path characteristics, using the received signal and a modulated data signal. A compensation section...
7002901 Apparatus and method for transmitting and receiving data in a CDMA communication system  
A method for assigning orthogonal codes used for a first system and a second system in a CDMA system including channels of the first system for spreading a pilot signal, a sync signal, a paging...
6992971 ATM telecommunication method whereby the terminals transmit to a common station  
The invention relates to an asynchronous transfer mode method of transmitting digital signals in which terminals ( 16, 18 ) send to the same station ( 20 ). Calls are transmitted by cells ( 40, 42,...
6990061 Method and apparatus for channel estimation  
This invention relates to a method and apparatus for channel estimation. A method of determining a maximum likelihood frequency domain estimate of the channel response of a channel between at least...
6985072 Apparatus and method for a low-rate data transmission mode over a power line  
In one embodiment, a system and method for receiving information over a power line in accordance with the HomePlug specification is described. The receiver side of the method involves separation of...
6985432 OFDM communication channel  
In an OFDM-based receiver, a time synchronization unit comprising: A. a device for extracting pilot signals contained in the OFDM received signal; B. a device for analyzing pilot signals in the...
6970416 OFDM system with simple terminals  
This invention is a wireless network based on orthogonal frequency division multiplexing (OFDM) and simple terminals. In a conventional OFDM system, the signal processing hardware is divided...
6954420 Method for displaying the modulation error of a multiple carrier signal  
The invention relates to a method for displaying the mean modulation error MER RMS of a multiple carrier (OFDM) signal in which: a) The square of the error vector is calculated according to the...
6954421 Orthogonal frequency division multiplexing receiver device  
After the OFDM signal for MMAC is received by a receiving unit , an FFT processing unit converts such OFDM signal into the signal Y(l, k) in the frequency axis direction. A data extracting unit...
6950475 OFDM receiver clock synchronization system  
A method is disclosed for synchronizing a OFDM signal. The method includes receiving an OFDM signal including a plurality of long and short synchronization symbols, each comprising a plurality of...
6950389 Peak-to-average power reduction in an orthogonal frequency division multiplexing system  
An Orthogonal Frequency Division Multiplexing (OFDM) transmission utilizes random phases across the OFDM sub-carrier components and differential encoding so that the phase information (i.e., phase...
6943668 Apparatus and method for reconfiguring a power line communication system  
A geometric harmonic modulation (GHM) communication system communicates GHM signals on a power line of a reconfigurable network. The GHM communication system includes a master controller connected...
6944120 Method and system for tiered digital television terrestrial broadcasting services using multi-bit-stream frequency interleaved OFDM  
The invention relates to a method and system for tiered digital broadcasting. A plurality of different bit streams representing digital data targeted for different services is received from a data...
Matches 201 - 250 out of 444 < 1 2 3 4 5 6 7 8 9 >