| Patent application number | Description | Published |
|---|
| 20080198785 | Methods and Apparatus for Cellular Broadcasting and Communication System - In a cellular wireless network, methods and apparatus are disclosed for a signal broadcasting scheme that can be individually augmented for users with poor reception. The network employs a first downlink channel (broadcast CH) for broadcasting data to all mobile stations (S | 08-21-2008 |
| 20080219363 | MULTI-CARRIER COMMUNICATIONS WITH ADAPTIVE CLUSTER CONFIGURATION AND SWITCHING - A method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described. In one embodiment, the method comprises allocating at least one diversity cluster of subcarriers to a first subscriber and allocating at least one coherence cluster to a second subscriber. | 09-11-2008 |
| 20080304551 | Methods and Apparatus for Overlaying Multi-Carrier and Direct Sequence Spread Spectrum Signals in a Broadband Wireless Communication System - A broadband wireless communication system, wherein both Multi-Carrier (MC) and Direct Sequence Spread Spectrum (DSSS) signals are intentionally overlaid together, in both time and frequency domains. The overlaying mitigates the weaknesses of each technique. The MC signal carries the broadband data signal and takes advantage of its high spectral efficiency, while the DSSS signal is used for special purpose processing such as initial random access, channel probing, and short messaging, where properties such as signal simplicity, self synchronization, and performance under severe interference are desired. The methods and techniques ensure that the MC and the DSSS signals are both distinguishable and that the interference between the overlaid signals is minimized to have insignificant impact on the expected performance of either signal. | 12-11-2008 |
| 20080305822 | Methods and Apparatus for Random Access in Multi-Carrier Communication Systems - Methods and apparatus in a multi-carrier cellular wireless network ( | 12-11-2008 |
| 20090028109 | METHODS AND APPARATUS FOR POWER EFFICIENT BROADCASTING AND COMMUNICATION SYSTEMS - Methods and apparatus are disclosed for resource configuration in a cellular broadcasting and communication network, where a video stream can be transmitted from a base station to a mobile station as bursts of video and data frames in a particular sequential manner. Special scheduling signals announce video burst information to the subscribing mobile stations, allowing the mobile stations to turn on their transceiver circuitry only when video bursts arrive. In a video burst, the available data resources, in addition to video resources, transmit data application packets and/or special control information to the subscribing mobile stations. Methods and processes are also disclosed for a mobile station to use a single RF tuner within a system with multiple frequency bands. | 01-29-2009 |
| 20090168912 | MULTI-CARRIER COMMUNICATIONS WITH ADAPTIVE CLUSTER CONFIGURATION AND SWITCHING - A method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described. In one embodiment, the method comprises allocating at least one diversity cluster of subcarriers to a first subscriber and allocating at least one coherence cluster to a second subscriber. | 07-02-2009 |
| 20100195609 | METHODS AND APPARATUS FOR MULTI-CARRIER COMMUNICATION SYSTEMS WITH ADAPTIVE TRANSMISSION AND FEEDBACK - An arrangement is disclosed where in a multi-carrier communication system, the modulation scheme, coding attributes, training pilots, and signal power may be adjusted to adapt to channel conditions in order to maximize the overall system capacity and spectral efficiency without wasting radio resources or compromising error probability performance, etc. | 08-05-2010 |
| 20100238833 | OFDMA with adaptive subcarrier-cluster configuration and selective loading - A method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described. In one embodiment, the method comprises allocating at least one diversity cluster of subcarriers to a first subscriber and allocating at least one coherence cluster to a second subscriber. | 09-23-2010 |
| 20100322119 | METHODS AND APPARATUS FOR MULTI-CARRIER COMMUNICATIONS WITH VARIABLE CHANNEL BANDWIDTH - Methods and apparatus for multi-carrier communication with variable channel bandwidth are disclosed, where the time frame structure and the OFDM symbol structure are invariant and the frequency-domain signal structure is flexible. In one embodiment, a mobile station, upon entering a geographic area, uses a core-band to initiate communication and obtain essential information and subsequently switches to full operating bandwidth of the area for the remainder of the communication. If the mobile station operates in a wide range of bandwidths, the mobile station divides the full range into sub-ranges and adjusts its sampling frequency and its FFT size in each sub-range. | 12-23-2010 |
| 20110051657 | Methods and apparatus for multi-carrier communications systems with automatic repeat request (ARQ) - Hybrid ARQ is employed in a multi-carrier communication system for retransmission of erroneous packets by taking advantage of time/frequency/space diversity and by combining ARQ functions at physical layer and MAC layers, making the multi-carrier system more robust in a high packet-error environment. | 03-03-2011 |
