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US20090323845 Wireless Mobile Communication System Without Pilot Signals  
The present invention is directed to a method for canceling the Doppler shift, multi-path propagation, delays, and long time selective fading influences of phase and/or amplitude modulated signals...
US20090122883 FOLLOW-UP SYNCHRONIZATION TO MAINTAIN SYNCHRONIZATION THROUGHOUT TRANSMISSION  
Method for an orthogonal frequency division multiplexing multipoint-to-point communications system are provided. In one embodiment, the method includes establishing communication between a first...
US20110255618 METHOD AND SYSTEM FOR MULTI-USER TRANSMIT OPPORTUNITY FOR MULTI-USER MULTIPLE-INPUT-MULTIPLE-OUTPUT WIRELESS NETWORKS  
Wireless communication in a wireless system using a multiple user transmission opportunity is provided. Data blocks at a wireless station are transmitted to multiple wireless receivers over a...
US20080187058 Reduction of dynamic range of transmitted signals  
According to an example embodiment, an example technique may include encoding a dataword into a codeword, mapping the codeword to a mapped word, generating a waveform corresponding to the mapped...
US20050063481 Amplitude compression of signals in a multicarrier system  
The channel estimates for the subcarriers are used to determine the signal strength distribution in the form of a cumulative histogram. The latter is used to determine, as a signal strength...
US20100220798 PREAMBLE FORMATS SUPPORTING HIGH-THROUGHPUT MIMO WLAN AND AUTO-DETECTION  
A method for generating a preamble of an Orthogonal Frequency Division Multiplexed (OFDM) data frame for a multiple input multiple output (MIMO) wireless communication includes determining at...
US20100111207 TRANSMITTER AND METHOD FOR CONFIGURING TRANSMISSION FRAME  
A transmitter which transmits information in transmission frame to a receiver, the transmission frame including multiple transmission symbols and guard intervals obtained by replicating a fixed...
US20100034130 Dynamic Discovery of Multicast Broadcast Services controller and Synchronization in Wireless Communication Systems  
Systems, apparatuses, and techniques for wireless communications can include operating an access service network to provide wireless communications to wireless devices based on an orthogonal...
US20070071122 Evaluation of transmitter performance  
Systems and methodologies are described that facilitate monitoring transmitter performance in a wireless communication environment. A signal analyzer can be used to sample the output of a...
US20120207231 MULTI-CLOCK PHY PREAMBLE DESIGN AND DETECTION  
In a method for generating a data unit for transmission via a communication channel, a first preamble portion of the data unit is generated based on whether a physical layer (PHY) mode is a first...
US20110090975 OFDM inter-carrier interference cancellation method  
The OFDM channel estimation and Inter-Carrier Interference (ICI) cancellation method uses a few pilots within Orthogonal Frequency Division Multiplexing (OFDM) systems in general, and mobile OFDM...
US20100177833 SYSTEMS AND METHODS FOR DETERMINING THE NUMBER OF CHANNEL ESTIMATION SYMBOLS BASED ON THE CHANNEL COHERENCE BANDWIDTH  
Various systems and methods are provided for channel estimation. These systems and methods (a) determine a coherence bandwidth for the channel, (b) adapt the channel estimation based on the...
US20090080552 SYSTEM FOR MULTIPLE USE SUBCHANNELS  
Systems for multiple use subchannels are provided. In one embodiment, a bidirectional communication system comprises: a first remote unit for communicating with a host using OFDM, the host...
US20070223609 Communication method and communication apparatus  
For transmitting predetermined information to a second communication station via a first communication station, the second communication station receives the predetermined information via one...
US20080212693 Transmitter and Receiver for Ultra-Wideland Ofdm Signals Employing a Low-Complexity Cdma Layer for Bandwidth Expansion  
A method and apparatus for transmitting and receiving high-bandwidth OFDM signals, while limiting the complexity of the OFDM signal processing is described. Bandwidth expansion is achieved by...
US20080037670 MAXIMAL RATIO COMBINING OF EQUALIZED SYMBOLS FOR MIMO SYSTEMS WITH HARQ AND/OR REPETITION CODING  
Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors based on the same...
US20150092870 DIGITAL UP CONVERTER  
A method that includes providing to multiple inverse fast Fourier transform (IFFT) and polyphase circuits multiple baseband channels so that different IFFT and polyphase circuits receive different...
US20130077658 SPATIALLY RANDOMIZED PILOT SYMBOL TRANSMISSION METHODS, SYSTEMS AND DEVICES FOR MULTIPLE INPUT/MULTIPLE OUTPUT (MIMO) WIRELESS COMMUNICATIONS  
Compressive sampling is used to generate pilot symbols to be transmitted over an array of antennas in a MIMO wireless communications device. A pilot symbol is transmitted over the array of...
US20070140362 Radio transmitter with reduced power consumption  
A technique for controlling a transmitter apparatus is useful for reducing power consumption, and may be particularly applicable to portable apparatuses such as mobile transceivers which employ a...
US20090028255 METHOD AND SYSTEM FOR COMMUNICATION  
A method and a system for communication are presented. In one example embodiment, the method includes the step of receiving a first frame of a communication signal. The first frame includes a...
US20100157970 MULTIPLE ANTENNA WIRELESS TELECOMMUNICATION METHOD AND SYSTEM  
A wireless telecommunication system and method including at least two transmit antennae and means for implementing a downlink switched sub-channels diversity scheme during transmission. The method...
US20070237244 METHOD FOR IMPLEMENTING AN EQUALIZER OF AN OFDM BASEBAND RECEIVER  
A method for implementing an equalizer of an orthogonal frequency division multiplexing (OFDM) baseband receiver is provided. The OFDM baseband receiver includes a channel estimation and tracking...
US20090116565 Method for selecting beams during initial synchronization process using switched beam, switched beam operation method and initial sychronization using the same  
A method for selecting beams, a switched beam operation method during an initial synchronization process, and an initial synchronization method using it are provided for selecting beams to...
US20090122731 PARTIAL DISCARDING OF CYCLIC PREFIX FOR EFFICIENT TDD OR HALF-DUPLEX FDD OPERATION  
Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from...
US20090225880 CONTROL SYSTEM AND METHOD HAVING AN ADAPTABLE ORTHOGONAL MULTIPLEXING MODULATION MECHANISM  
A control system and a method having an adaptive orthogonal multiplexing modulation mechanism are provided. The control system includes a modulation control module for detecting input signals...
US20090154577 Determination of Pre-Coding Matrix Indicators for Spatial Multiplexing in a Mobile Communications System  
A pre-coding matrix is determined in an OFDMA, multiple transmit antenna communication system having a number of sub-carriers grouped into a number, M, of resource blocks. This involves...
US20130107976 COMMUNICATION DEVICE AND COMMUNICATION SYSTEM  
A communication device includes: a reception element for receiving a radio signal modulated in a first modulation scheme or a second modulation scheme; a first demodulation element for...
US20110044392 Systems And Methods For High-Throughput Wideband Wireless Local Area Network Communications  
A frame format provides for wideband wireless local area network communications and informs narrower-band communication units when the channels are occupied by wider-band communication units. In...
US20070153878 Spur suppression for a receiver in a wireless communication system  
Techniques for suppressing spurs in a receiver are described. A processor (e.g., within a wireless device) receives digital samples for a desired signal having a spur located within the bandwidth...
US20100046483 PROTOCOL FOR SWITCHING BETWEEN CHANNELS IN TYPE 2 AGILE RADIO  
The system (400), apparatus (401.j), and method (100) of the present invention provide a way to expand and contract the available wireless channels opportunistically by optimally switching the...
US20090003468 SYSTEM AND METHOD TO OPTIMIZE MULTICARRIER COMMUNICATION  
A system and method for allocating transmitter power to subcarriers of a multicarrier signal is provided. First, the subcarriers are transmitted with an initial set of power levels and an initial...
US20130223547 METHOD OF DESIGNING CODEBOOK FOR NETWORK MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATION SYSTEM AND METHOD OF USING THE CODEBOOK  
Provided herein is a method of designing a network codebook that may be shared by a plurality of base stations. Also provided herein is a feedback method of a terminal using the network codebook....
US20080056391 Mitigating OFDM Receiver Interference Caused by Intermittent Signal Transmission  
Degradation of the OFDM signal carrying DVB-H content, caused by GSM burst transmission, is overcome without the need for hardware to constrain the GSM transmission spectrum by the modulating of...
US20090010346 TDS-OFDMA Communication System  
In a TDS-OFDM communications system, a frame structure comprising: a frame such that within a frame time, a transmitted signal comprising a preamble, a downlink sub-frame, and an uplink sub-frame...
US20100061327 ACKNOWLEDGEMENT CHANNEL DESIGN FOR WIRELESS NETWORKS  
Various example embodiments are disclosed. According to an example embodiment, a technique may include transmitting a message to allocate resources to a mobile station in a wireless network for an...
US20110222615 METHODS AND APPARATUS FOR REDUCING UPLINK MULTI-BASE STATION INTERFERENCE  
Method and apparatus for generating a precoder for uplink transmission from a mobile station. The method includes receiving information corresponding to a first precoding matrix and a second...
US20070201567 DEVICE AND METHOD FOR CLIPPING MULTICARRIER SIGNAL  
A device and a method for clipping multicarrier signal are provided. The method for clipping multicarrier signal includes: detecting whether an Idle Period in DownLink (IPDL) starts in each...
US20050259757 Frequency domain equalization in communications systems with scrambling  
A method of, and system for applying frequency-domain equalization in a DS-CDMA system, either by augmenting the transmitted data block before it is scrambled by appending a prefix and a suffix...
US20070147522 Integrated circuit capable of independently operating a plurality of communication channels  
An apparatus according to one embodiment may include an integrated circuit. The integrated circuit may include a plurality communication channels. The integrated circuit may be is capable of...
US20090268710 UPLINK SYNCHRONIZATION WITHOUT PERIODIC RANGING IN A COMMUNICATION SYSTEM  
An apparatus and method for uplink synchronization without periodic ranging in a communication system includes a first step (700) of detecting embedded pilot signals in data traffic from mobile...
US20070098099 PRECODING FOR SEGMENT SENSITIVE SCHEDULING IN WIRELESS COMMUNICATION SYSTEMS  
Techniques to enhance the performance in a wireless communication system using segments called subbands and using precoding are shown. According to one aspect, the bandwidth for transmission to an...
US20100046494 BASE STATION SYNCHRONIZATION  
Systems and methodologies are described that facilitate synchronizing base stations in a wireless communication environment. A base station can receive a synchronization signal sent via a low...
US20100158170 METHODS AND SYSTEMS USING FFT WINDOW TRACKING ALGORITHM  
Techniques for the adjustment of a position of Fast Fourier Transform (FFT) window are provided. The adjustment may be based on the condition that the length of channel impulse response is larger...
US20120243628 RECEPTION DEVICE, RECEPTION METHOD, AND RECEPTION PROGRAM  
A channel estimator estimates a channel estimation value. A symbol replica generator generates a symbol replica that is a modulation symbol of the information demodulated. A signal extractor...
US20070104286 Equipment and method for MIMO SC-FED communication system  
Equipment for a MIMO differential SC-FED communication system that includes a transmitter and a receiver is provided. The transmitter has a differential block encoder module for receiving a...
US20070237247 Method of reducing a peak to average power ratio of a modulated signal  
The invention relates to a method of reducing a peak to average power ratio of a signal, wherein the signal comprises data that is designated for transmission to a sector of a plurality of...
US20080019455 Mobile Station in Orthogonal Frequency Division Multiplexing Access System and Transmit Power Control Method Thereof  
The present invention relates to a mobile station of an OFDMA system and a transmit power control method thereof. The mobile station includes a modulator, a variable gain amplifier, a gain...
US20070280336 Constrained Optimization Based Mimo Lmmse-Sic Receiver for Cdma Downlink  
A system according to embodiments of this invention provide a multiple transmit antenna (117-1 . . . M), multiple receive antenna (121-1 . . . N) (MIMO) receiver (125) design for the communication...
US20090190677 Physical Layer and Data Link Layer Signalling in Digital Video Broadcast Preamble Symbols  
Aspects of the invention are directed to physical layer and data link layer signaling in digital video broadcast preamble symbols. Embodiments are directed to distributing physical layer...
US20070217525 Frequency tracking which adapts to timing synchronization  
A frequency tracking method and apparatus is provided. A receiver receives OFDM symbols and determines associated frequency offset. A frequency error estimator selects a cross correlation window...