Abstract: An apparatus and associated methods for performing space-frequency interleaving in a multicarrier wireless communication system is generally described.

Abstract: Various embodiments are described for a trained data transmission for communication systems.

Abstract: A multiple-input-multiple output (MIMO) transmitter for transmitting an orthogonal frequency division multiplexed (OFDM) symbol over a plurality of spatial channels using a plurality of antennas is described. The transmitter includes encoding circuitry to encode blocks of input bits in accordance with a variable encoding rate to generate blocks of encoded bits and a spatial-frequency parser to parse the blocks of encoded bits into spatial-frequency groups. The transmitter also includes subcarrier modulators to modulate each spatial-frequency group of encoded bits on one of the OFDM subcarriers to generate symbol-modulated subcarriers. Spatial-frequency groups having a greater number of encoded bits are modulated at higher-order modulation levels and spatial-frequency groups having a lesser number of encoded bits are modulated at lower-order modulation orders.

Abstract: An apparatus and associated methods to improve diversity gain while preserving channel throughput in a multicarrier communication channel are generally presented.

Abstract: An embodiment of the present invention provides a method of supporting multiple protocols in a wireless network operating according to an Institute for Electronic and Electrical Engineers IEEE) 802.16 standard, comprising adding a new convergence sub layer (CS) type in which an extra field is added to an 802.16 service data unit (SDU) to indicate which higher layer protocol is carried in a 802.16 SDU payload.

Abstract: Methods and apparatus to control transmission of a multicarrier wireless communication channel through multiple antennas is generally described.

Abstract: Complex antennas weights for use in beamforming in a multiple-antenna system are determined based upon clear channel assessment (CCA) information in a wireless networking environment.

Abstract: Embodiments herein may operate at a cooperating relay station (CRS) in a wireless packet-carrying network (WPCN). A source-to-CRS (SC) link quality of an SC wireless channel may be estimated using signal quality information derived from a packet transmitted by a source station and received by the CRS. A CRS-to-destination (CD) link quality of a CD wireless channel may also be estimated using signal quality information derived from a packet transmitted by a destination station and received by the CRS. A source-to-destination (SD) link quality parameter representing SD link quality may be extracted by the CRS from the packet transmitted by the destination station. The CRS may decide whether to participate with the source station or with another CRS in transmitting an SD packet based upon the SC link quality, the CD link quality, the SD link quality, or a combination thereof. Other embodiments may be described and claimed.

Abstract: Methods and arrangements for wireless communications are contemplated. Embodiments include transformations, code, state machines or other logic to determine the signal to noise ratios (SNRs) of multiple stations associated with an access point in a wireless network. The embodiments may also include selecting whether one of the stations communicates with the access point by an orthogonal frequency division multiplexing (OFDM) transmission method or a multiple-access joint coding/decoding transmission method, the selecting based upon the SNRs and communicating the selected transmission method to the station of the multiple stations. Some embodiments may include determining an SNR threshold level, selecting the MAC transmission method if the SNR of at least one of the multiple stations is below the SNR threshold level, and selecting the OFDM transmission method if the SNRs of all of the multiple stations are above the SNR threshold level. Other embodiments are described and claimed.

Abstract: A compensating correction value for adjusting analog signals received from multiple antenna elements takes into account the effects of colored noise, co-channel interference, and inter-sample interference. The method of generating the compensating correction value for analog combining architectures considers the total channel impulse response over a block of time.

Abstract: Methods, apparatuses and systems for communicating in a wireless network are disclosed. One embodiment includes a method for communication in a wireless network that comprises determining a signal-to-noise ratio (SNR) for channels between a base station, one or more relay stations, and a user and selecting a relay station based on the determined SNRs. Embodiments may also include determining a time sharing parameter and a total transmitting time, transmitting by the base station to the selected relay station for a first duration, and transmitting simultaneously by the base station and relay station using multi-access code for a second duration. The simultaneous transmission may be adapted to be decoded utilizing joint decoding with interference cancellation. Other embodiments are disclosed and claimed.

Abstract: In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the same set of OFDM subcarriers and may take advantage of the multipath characteristics of the spatial channel allowing the communication of additional data without an increase in frequency bandwidth. Space-frequency subcarrier modulation assignments may be dynamically assigned on a per subcarrier basis as well as a per spatial channel basis to help maximize the data-carrying capacity of the channel. In some embodiments, each of the spatial channels may be associated with one of a plurality of spatially diverse antennas. In other embodiments, beamforming may be performed to allow the transmission and/or reception of signals within the spatial channels.

Abstract: A multiple-input multiple output (MIMO) transmitter and methods for transmitting orthogonal frequency division multiplexed (OFDM) symbols with cyclic-delay diversity (CDD) are generally described herein. In some embodiments, a base station uses a number of antennas for MIMO transmission of OFDM symbols. For the number of antennas, quadrature-amplitude modulated (QAM) symbols are distributed across a group of OFDM tones of a block comprising the group of tones and a group of OFDM symbols. An incremented cyclic delay is applied to the QAM symbols of the block associated with each subsequent of the antennas for CDD transmission. Each blocks is transmitted by an associated one of the antennas.

Abstract: A system, apparatus, method and article to manage diversity for a wireless multicarrier communication system are described. An apparatus may include a diversity agent to couple to a transmitter, the diversity agent to convert a determined number of input bits into symbols, interleave the symbols across multiple spatial streams, and map the symbols to tones for each spatial stream. Other embodiments are described and claimed.

Abstract: An apparatus and associated methods for performing space-frequency interleaving in a multicarrier wireless communication system is generally described.

Abstract: In a multiple-input multiple-output (MIMO) multicarrier communication system, a mobile station sends a quantized time-domain representation of the channel transfer function to a base station for use by the base station in generating beamforming coefficients for use in subsequent transmissions to the mobile station. In some embodiments, the quantized time-domain representation of the channel transfer function may be generated from selected most significant rays of an initial estimated sampled channel impulse response. Other embodiments may be described and claimed.

Abstract: In a multicarrier transmitter that transmits two or more spatial data streams, a bit distributor assigns encoded bits to the spatial data streams based on bit-loading capabilities of the streams and in a manner to intermix the bits among the spatial streams.

Abstract: Multiple wireless user devices act cooperatively to communicate with a remote destination node through a MIMO channel. In at least one embodiment, a cooperative cluster of user devices is formed that makes use of vertical coding techniques to achieve enhanced communication performance.

Abstract: A multiple output transmitter is configured for transmitting a single input data stream over two or more spatial channels using OFDM signals. The transmitter includes a commutator to select bits from the single input data stream for two or more bit streams and two or more encoders each to encode bits of one of the bit streams. The commutator operates at a bit rate and sequentially provides the selected bits of the input data stream to the encoders. A spatial bit sequencer selects groups of encoded bits from each of the encoders and assigns individual bits of a selected group at the bit-rate to block permuters in a sequential manner to distribute bits from the selected group across the block permuters. The block permuters produce interleaved blocks of bits for an associated spatial stream. The commutator assigns bits of the input bit stream to more than one encoder to allow each encoder to operate at a lower rate.

Abstract: A multiple-input-multiple output (MIMO) transmitter for transmitting an orthogonal frequency division multiplexed (OFDM) symbol over a plurality of spatial channels using a plurality of antennas is described. The transmitter includes encoding circuitry to encode blocks of input bits in accordance with a variable encoding rate to generate blocks of encoded bits and a spatial-frequency parser to parse the blocks of encoded bits into spatial-frequency groups. The transmitter also includes subcarrier modulators to modulate each spatial-frequency group of encoded bits on one of the OFDM subcarriers to generate symbol-modulated subcarriers. Spatial-frequency groups having a greater number of encoded bits are modulated at higher-order modulation levels and spatial-frequency groups having a lesser number of encoded bits are modulated at lower-order modulation orders.