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7634016 Variable OFDM subchannel coding and modulation  
A system for selecting a modulation scheme and an error correction coding scheme for each subchannel in an OFDM system based on the energy detected on that subchannel.
7620072 Device for reproducing received data for radio data communication and a method of adjusting frequency therefor  
A receiver arrangement including a received data reproducing device includes an RF (Radio Frequency) receiver configured to determine the signal strength of a received signal and feed it to a clock...
7619963 OFDM signal frame generator, transmitter, signal transmission system and OFDM signal frame generating method  
An OFDM signal frame generator includes a rate determiner configured to determine rate information to generate a signal frame to be transmitted as an OFDM signal based on a value of a received...
7620370 Mobile broadband wireless access point network with wireless backhaul  
A WiMAX network and communication method, the network including a plurality of WiMAX nodes deployed in micro or pico cells for providing access service to a plurality of mobile subscribers, a...
7620028 Multi-channel binding in data transmission  
A system and method are described for binding together a plurality of wireless data communications channels, whereby an aggregate throughput improvement is realized. A master channel amongst the...
7613245 Method and apparatus for multiplexing data and control information in wireless communication systems based on frequency division multiple access  
An apparatus for transmitting data in a frequency division multiple access based communication system is disclosed. The apparatus includes a symbol block generator for generating a symbol block in...
7609752 Transmitter and transmission control method used in random access communication environment  
A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement...
7606193 Methods for implementing a dynamic frequency selection (DFS) feature for WLAN devices  
Various regulatory domains promulgate standards to define how wireless devices should operate in certain frequency bands. The 5 GHz spectrum is of particular importance to certain regulatory...
7602696 Adaptive guard intervals in OFDM systems  
Dynamic guard interval adaptation is provided for devices having differing delay spreads in an OFDM communication system to reduce the guard intervals, with adaptation controlled by either the...
7602730 Systems and methods for transitioning between fragmentation modes  
A cable modem termination system that connects to cable modems includes a scheduler and a system manager. The scheduler schedules transmission opportunities for the cable modems and operates in...
7602855 Method and apparatus for singular value decomposition of a channel matrix  
A method and apparatus for decomposing a channel matrix in a wireless communication system are disclosed. A channel matrix H is generated for channels between transmit antennas and receive...
7599422 Adjustable dual-band link  
A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a...
7596798 Apparatus and method for extending DOCSIS cable modem service over wireless links  
An apparatus and method are presented to allow the extension of a DOCSIS cable modem service over a wireless link. According to the invention a wireless hub transceiver is connected to a...
7593417 Handling broadcast and multicast traffic as unicast traffic in a wireless network  
An access point is to handle received broadcast or multicast traffic as multiple instances of unicast traffic, where each instance is destined for a corresponding wireless client device associated...
7593473 Tree structured multicarrier multiple access systems  
A Tree-structured multicarrier multiple access communication system in a multiple access environment having a number of interfering signals. In one embodiment an environment estimator estimates and...
7583738 Apparatus and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing communication system  
Provided is a method for reducing a PAPR (Peak-to-Average Power Ratio) of a transmit signal in a broadband wireless communication. The method includes the steps of: assigning information signals to...
7583629 Referencing of downlink channels in wireless communication system  
The present invention relates to a method for referencing a physical channel carrying point-to-multipoint service data in a wireless communication system. The present invention utilizes an...
7583582 M-ary orthogonal keying system  
A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of...
7580487 Apparatus and method for estimating a carrier to interference and noise ratio in a communication system  
An apparatus and a method for estimating a carrier to interference and noise ratio (CINR) in a communication system. The CINR value is precisely estimated by removing the error floor value, which...
7577111 Method and system for wireless interfacing of electronic devices  
The present invention enables users to interface with a wide range of computing and telecommunication devices seamlessly without a cable connecting the devices. As such, the present invention...
7567550 Broadband communications  
A communications network has a communications station, such as a telephone exchange, and at least one interface, such as a cabinet. A plurality of optical carriers are provided between the exchange...
7564829 Allocation of radio resource in orthogonal frequency division multiplexing system  
An uplink capacity is increased by a method in which more than two mobile stations simultaneously use a radio resource allocated to one mobile station. A method of allocating a radio resource in an...
7558327 Pattern position measuring device, method, and program, and record medium on which the program is recorded  
The position of a specific pattern such as a known symbol in a signal such as an OFDM signal is estimated with high accuracy. An effective symbol extraction section extracts a known symbol...
7548616 Termination device for a telephone line  
A termination device for a telephone line of a wire based telephone system, said termination device ( 30 ) comprising: a high pass filter ( 39 ) for separating signals within a frequency band used...
7548564 Method and apparatus for transmitting data based on OFDM  
Provided is a method and apparatus for transmitting data based on OFDM (Orthogonal Frequency Division Multiplexing). The method includes: forming a plurality of packets suitable for a selected...
7545832 Radio communication system, transmitting apparatus, receiving apparatus, processing method and program  
A transmitting apparatus includes a data dividing unit operable to divide data into pieces of transmittable data, a data outputting unit operable to add a distribution order to the divided pieces...
7539217 Multi-carrier signal transmitter and multi-carrier signal receiver  
In transmitting first information necessary for gaining synchronism of transmission signal and second information which is the other information by determining a break of a single modulation unit...
7522544 Radio communication apparatus and subcarrier assignment method  
Wireless communication apparatus capable of improving communication efficiency by reducing the amount of control information transmitted is disclosed. With this apparatus, channel quality...
7522637 Dynamic resource allocation method for an OFDMA system  
A dynamic resource allocation method in an OFDMA system is provided. A base station determines if each of a plurality of SSs supports subchannel-based dynamic resource allocation. If an SS supports...
7522636 System for controlling a plurality of equipments  
A main control apparatus is connected to a single signal line. A plurality of equipments is respectively connected to a multipoint line. Each multipoint line diverges from the single signal line....
7519031 System and methods of differential communication  
[Object] To provide a differential communication system that is preferable for performing differential communication in a dynamically configured network. [Solving Means] Portable terminals 100 ...
7509049 System for selectively combining satellite signals sent to a user through an optical fiber  
A method and apparatus are provided for transferring a plurality of satellite signals through an optical communication network. The method includes the steps of selecting a frequency of a local...
7505735 Communication terminal device and communication relay method  
There is provided a mobile station device in a multi-hop system capable of realizing relay of communication of another station while suppressing increase of power consumption of the local station....
7499462 System, method and apparatus for wireless delivery of content from a generalized content source to a generalized content sink  
A system, method and apparatus for implementing a wireless point-to-point interface that securely and robustly delivers digital content from a generalized content source to a generalized content...
7492794 Channel estimation method and apparatus for multi-carrier radio transmitting system  
A multi-carrier CDMA radio transmitting method replicates each information symbol and disposes thus-obtained information symbols along a frequency axis, multiplies the thus-obtained information...
7483366 STFBC coding/decoding apparatus and method in an OFDM mobile communication system  
A mobile communication system modulates input data with a specific size into an OFDM symbol and transmits the OFDM symbol through an antenna. In the mobile communication system, a replica generator...
7477653 Accelerated channel change in rate-limited environments  
Accelerated channel change (ACC) strategies are described for supplying a client module with media information by transitioning between a first delivery of media information provided by first...
7471745 Method and apparatus for channel quality metric generation within a packet-based multicarrier modulation communication system  
A communication system disclosed herein includes a channel quality estimation module that determines the channel quality metric utilizing the preamble portion of the packet only. Data, in such a...
7457324 Multi-carrier CDMA radio transmitting method and apparatus, and channel estimation method and apparatus for multi-carrier CDMA radio transmitting system  
A multi-carrier CDMA radio transmitting method replicates each information symbol and disposes thus-obtained information symbols along a frequency axis, multiplies the thus-obtained information...
7457314 Method for improving the quality of voice transmission via a radio interface  
After a predetermined period of time has lapsed after transmission of a voice data packet representing a first voice section a second voice data packet representing the same voice section is...
7450629 Adjustable dual-band link  
A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a...
7443818 Method, apparatus and system of multiple-input-multiple-output wireless communication  
Embodiments of the present invention provide a method, apparatus and system for selectively modulating a data frame of a signal using either a frequency-multiplexing modulation method or a...
7440391 Method and system for dynamic bandwidth allocation  
Systems and methods for bidirectional communication are provided. In one embodiment, a bidirectional communication comprises a multipoint-to-point host unit and a plurality of remote units...
7440437 Method and apparatus for scheduling downlink channels in an orthogonal frequency division multiple access system and a system using the same  
A downlink channel scheduling method and apparatus for obtaining optimal system performance in a downlink of a wireless communication system using an orthogonal frequency division multiplexing...
7420957 Mobile termile capable of efficiently measuring CNIR and CNIR measuring method thereof  
The present invention relates to a mobile terminal for efficiently measuring a carrier to noise and interference ratio (CNIR) in an orthogonal frequency division multiplexing (OFDM) mobile...
7414961 System and method for multiframe alignment in a multipoint-to-point orthogonal frequency division multiplexing system  
Systems and methods for multiframe alignment in a multipoint-to-point orthogonal frequency division multiplexing (OFDM system are provided. In one embodiment, an (OFDM) communication system...
7414960 Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing  
Systems and methods for bidirectional communication are provided. In one embodiment, a multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system comprises: a...
7411894 Apparatus and method for guard interval inserting/removing in an OFDM communication system  
A transceiver system and method in an OFDM communication system which enables exact symbol synchronization acquisition and improves performance for frequency offset and channel estimation. In the...
7411982 Digital wireless voice and data modem  
Simultaneous transmission of voice and data over the voice channel of a digital wireless communications network, such as a “cell phone” network, is reconfigurable on the fly among multiple...
7403472 OFDM receiving device and OFDM receiving method  
The time required for switch the channel can be remarkably curtailed. When broadcasting signals through a plurality of information channels with an OFDM system, the plurality of information...
Matches 1 - 50 out of 417 1 2 3 4 5 6 7 8 9 >