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7440392 |
Wireless receiver deinterleaver having partitioned memory
A deinterleaver module in an OFDM wireless transceiver includes partitioned memory banks for storage of code word fragments from an interleaved data stream, each code word fragment associated with...
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7440507 |
Turbo channel estimation for OFDM systems
A system and method for estimating a channel in a wireless receiver is disclosed. The method preferably applies to a communication system using the OFDM standard. The method comprises receiving a...
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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...
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7436759 |
Reception apparatus and method, and channel response measurement apparatus for receiving an orthogonal frequency divisional multiplexing signal
A reception apparatus for receiving an OFDM signal having a plurality of pilot carriers that transmit predetermined pilot signals at predetermined symbols. The reception apparatus transforms the...
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7436758 |
Apparatus and method for transmitting/receiving pilot pattern set to distinguish base station in orthogonal frequency division multiplexing (OFDM) communication system
An apparatus and method for transmitting/receiving a pilot pattern set to distinguish a base station in an FDM communication system. The method divides a total frequency bandwidth into at least two...
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7436760 |
Method for reading sensor
A method for reading sensor that stores data in numerous separate memory cells, such as 1-D linear sensor or 2-D sensor composed of some 1-D linear sensor. To read the sensor, initially receiving a...
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7436897 |
OFDM receiving apparatus and receiving method thereof
An Orthogonal Frequency Division Multiplexing (OFDM) receiving apparatus having a sub-carrier selectively combining mode and an antenna selecting mode. The sub-carrier selectively combining mode is...
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7433298 |
Compensation for residual frequency offset, phase noise and I/Q imbalance in OFDM modulated communications
Signal processing methods and apparatus which incorporate I/Q imbalance compensation based on most likely estimates of the I/Q imbalance between the I and Q components of a baseband signal are...
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7433382 |
Spread spectrum based multichannel modulation for ultra wideband communications
A spread spectrum based multichannel modulation Ultra-Wideband (UWB) communication transceiver for indoor wireless operations is presented according to some embodiments. The spread spectrum based...
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7433413 |
Data transmission apparatus and method in an OFDM communication system
An apparatus and method for transmitting data on a plurality of frequency sub-channels for a plurality of successive symbol periods through a plurality of transmit antennas in an OFDM system. In...
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7433660 |
Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements
An iterative multistage detection system and method for orthogonally multiplexing K channels onto a signal processing chain using N orthogonal sequences of length N. The K channels include a first...
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7430190 |
Systems and methods for resource allocation to multiple antenna arrays for maintaining a constant bit rate (CBR) channel
A wireless communication system configured for the efficient allocation of resources is provided. The wireless communication system can include a transmit system having a first set of one or more...
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7430243 |
Space-time-frequency coded OFDM communications over frequency-selective fading channels
Techniques are described for space-time-frequency (STF) coding of multi-carrier transmissions over frequency-selective fading channels. In particular, techniques for STF coding of MIMO-OFDM systems...
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7430241 |
Method for early decoding of control channel information
A system and method for transmitting and receiving control information over a control channel of a wireless communication system where the conveyed information is coded and then transformed by a...
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7430163 |
Data stream transmission preprocessing
Embodiments of transmission data stream pre-processing are disclosed. A method includes receiving the data stream for transmission, forming blocks of samples from the data stream, inverse Fourier...
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7426177 |
Round trip delay adjustment in multipoint-to-point communication using orthogonal frequency division multiplexing
Systems and methods for bidirectional communication are provided. In one embodiment, a method for aligning communications from a plurality of remote units in a multipoint-to-point orthogonal...
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7426204 |
Symbol synchronization method for OFDM-based wireless communication system
Disclosed is a symbol synchronization method in an OFDM-based communication system which includes multiple access nodes supporting wireless connection of terminals, supports multi-connection of...
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7423959 |
Process for synchronization in the downstream of multiple users in a point multipoint system with OFDM modulation
The system in this invention is applicable to bi-directional communication over the electricity network between a head-end and a plurality of users, and permits the synchronization in time and...
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7423960 |
Orthogonal frequency division multiplexing (OFDM) equalizer
A novel and simplified orthogonal frequency division multiplexing (OFDM) equalizer uses a coordinate rotation digital computer (CORDIC) to convert the estimated channel effects from rectangular...
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7420913 |
Method for tone hopping in a multipoint-to-point orthogonal frequency division multiplexing communication system
Methods for an orthogonal frequency division multiplexing multipoint-to-point communications system are provided. In one embodiment, a method comprises: establishing communication between a first...
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7420914 |
Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing
A bidirectional communication system is provided. In one embodiment, a system comprises a host unit and a plurality of remote units using a multiple access scheme to communicate at the same time...
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7420915 |
Radio communications apparatus and radio communications method
The invention performs orthogonal frequency division multiplex processing on a transmission signal to form an OFDM modulation signal (daubed in FIG.) and performs orthogonal frequency division...
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7420912 |
Method to increase the capacity of a transmission system using waveforms
A method to increase capacity in a transmission system using parallel waveforms comprises several transmitters and at least one receiver. To determine the signal received at the receivers, the...
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7417945 |
Transmitter and receiver for use with an orthogonal frequency division multiplexing system
The present invention discloses a transmitter and receiver for use with an orthogonal frequency division multiplexing (OFDM) communications system. In one embodiment, the OFDM communications system...
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7418041 |
Transmitting/receiving apparatus and method for reducing PAPR in an OFDM mobile communication system
A block coding apparatus and method in an OFDM mobile communication system are provided. They reduce PAPR to 3 dB or less, while increasing a traditional block coding rate by twice, by use of...
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7417946 |
OFDM transmission apparatus and method having minimal transmission delay
An OFDM transmission apparatus having minimal transmission delay comprises a training symbol storage and generation unit, a delay unit and a controller. The training symbol storage and generation...
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7417974 |
Transmitting high rate data within a MIMO WLAN
A method for transmitting high rate data within a multiple input multiple output (MIMO) wireless local area network (WLAN) begins by determining a data transmission rate. The method continues by,...
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7414963 |
Dynamic zero suffix addition
A method of processing a received OFDM symbol is disclosed. The received OFDM symbol has a symbol portion and a zero suffix portion. An information bearing portion of the zero suffix portion that...
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7414964 |
Dynamic sub-carrier assignment of OFDM systems
A method and apparatus are provided for selecting and signalling the identity of sub-carriers to be used for transmission of data in a radio communication system, and for using other sub-carriers....
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7415043 |
Code division multiple access (CDMA) method and apparatus for protecting and authenticating wirelessly transmitted digital information
A spread spectrum method and apparatus for protecting and authenticating wirelessly transmitted digital information using numerous techniques. The apparatus may be a wireless code division multiple...
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7414958 |
Efficient tone ordering for multitone transmission
A method for data communication includes providing an order for assigning bits of an input data stream to tones in a multi-tone modulation scheme, and allocating respective bit-loading values to...
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7411897 |
Method and apparatus for generating an edge sidelobe canceling signal and uplink communication method and apparatus using the same in an OFDMA system
An apparatus and method for generating an edge sidelobe canceling signal and an uplink communication apparatus using the same in an orthogonal frequency division multiplexing access (OFDMA) system....
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7411898 |
Preamble generator for a multiband OFDM transceiver
Preamble generator for a multiband frequency division multplexing (OFDM) tranceiver of a wireless personal area network (WPAN) being switchable between a time frequency interleaving (TFI)-mode...
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7411896 |
Method, apparatus, and system for power amplifier efficiency improvement
According to one embodiment of the present invention, a method is provided in which a set of data symbols is partitioned into a plurality of subsets. The data symbols are used to modulate the...
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7408873 |
System and method for round trip delay adjustment in a multipoint-to-point orthogonal frequency division multiplexing system
Systems and methods for round-trip-delay adjustment in a multipoint-to-point orthogonal frequency division multiplexing (OFDM) system are provided. In one embodiment, a method for...
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7403471 |
Method and apparatus for setting a guard interval in an OFDM communication
A method and apparatus for setting a guard interval in an OFDM communication. The method includes attaching a part of a first valid symbol to the first valid symbol as a guard interval and...
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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...
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7400573 |
Dynamic allocation of cyclic extension in orthogonal frequency division multiplexing systems
Briefly, in accordance with one embodiment of the invention, an orthogonal frequency division multiplexing system may provide a dynamically calculated cyclic extension, the length of which may be...
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7400974 |
Method and apparatus for locating position of a GPS device
A method and apparatus for locating position of a GPS device is described. In one example, a method for provisioning a mobile device with a model for determining a position of the mobile device in...
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7400898 |
Method for operation of HARQ in a broadband wireless access communication system
Provided is a method supporting a Hybrid Automatic Repeat Request (HARQ) between a subscriber station and a base station in a broadband wireless access communication system. The method includes...
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7400614 |
Methods and apparatus for downlink diversity in CDMA using Walsh codes
Downlink diversity in a CDMA system is provided by employing Walsh codes in conjunction with M transmit antennas at a common base station serving K mobiles, where M may or may not be to equal to K....
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7397839 |
OFDM communication system and method
A transmitter used in a wireless communication system based on an orthogonal frequency division multiplexing (OFDM) scheme includes a determination unit that determines a spreading factor and an...
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7397783 |
Method for code re-allocation in telecommunication systems, related system and computer product
In a code division multiple access transmission system (CDMA), codes are generated according to a tree structure organized on a plurality of layers. Each re-allocation is considered as an access...
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7397862 |
Method of designing interleavers for multiple-encoder MIMO OFDM systems
An improved interleaver design to fully explore the diversity of the MIMO OFDM systems provides higher diversity gain than usual. A method for wireless data communication using such interleaver...
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7397758 |
Channel tracking in a OFDM wireless receiver
An apparatus and a method to estimate the channel response for a set of subcarriers in an OFDM receiver. The receiver receives a packet of information that includes a known transmitted part having...
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7394754 |
System and method for transmitting data in a multiple-branch transmitter-diversity orthogonal frequency-division multiplexing (OFDM) system
A system and method for transmitting data in multiple-branch transmitter-diversity OFDM systems is presented. In one embodiment, an approach is taken where an inverse Fourier transform (IFT) is...
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7395309 |
Modem activity detection
A method for reducing Internet bandwidth used for data transfer between an originating modem and an answering modem over a VoIP connection is provided. Idle data received from the originating modem...
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7395066 |
Method, system and device for improving performance during cell change
The invention discloses a communication system, method and devices for controlling transmission of packets to a user equipment during cell change. The communication system is configured so that...
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7394753 |
Training premable in multipoint-to-point communication using orthogonal frequency division multiplexing
A training premable in multipoint-to-point communication using orthogonal frequency division multiplexing (OFDM) is provided. In one embodiment, a system comprises a host unit and a plurality of...
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7391714 |
Point to multipoint system and process for the transmission over the electricity network of digital data
The system enables bidirectional communication between a center and a plurality of users via a power line network and is characterized in that low and high speed communication can be established to...
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