Abstract: A method and system provides a way to achieve very high data rate expanded bandwidth (wide band) WLAN operations reusing existing single channel radio designs. The system provides a dual-channel form of operation for greater flexibility and performance across multiple platforms. Further, the system provides adaptive anti-aliasing techniques for eliminating aliasing due to adjacent channel waveform effects. These techniques mesh with existing systems cleanly.

Abstract: Disclosed herein are various embodiments of methods, systems, and apparatus for increasing packet generation in a digital communication system. In one exemplary method embodiment, multiple input signals are interpolated, shifted, and aggregated into a composite signal for transmission over a network.

Abstract: A wireless receiver that sorts packets including a packet detector, multiple correlators, and multiple packet processors. Each correlator correlates a received signal according to packet type. Each packet processor processes the received signal according to packet type. A signal power detector may be provided to initially qualify the received signal as containing a packet, and the correlators determine whether a packet is present. The correlators may be configured for sequential or simultaneous correlation. For the simultaneous correlator configuration, a correlation monitor is provided to monitor correlation results to determine if the received signal contains a packet, and if so, to determine packet type. A low SNR packet detector may be provided which correlates the received signal to detect weak packet signals.

Abstract: Systems and methods for facilitating communication between communication devices are provided. An exemplary method includes: sending an indication signal by a second communication device to a first communication device, the indication signal corresponding to a request to receive buffered data from the first communication device; and sending a data frame by the second communication device to the first communication device.

Abstract: Included are embodiments for communicating data using a plurality of formats. At least one embodiment of a method includes transmitting a plurality of first format data frames with a predetermined time period between transmitted first format data frames and determining a duration of the time period between the transmitted first format data frames. Similarly, some embodiments include fragmenting a second format data frame into a plurality of second format subframes such that the second format subframes may be transmitted during the time period between the transmitted first format data frames.

Abstract: Disclosed herein are various embodiments of methods, systems, and apparatus for encoding OFDM packets in a digital communication system. In one exemplary method embodiment, LDPC codewords in an IEEE 802.11 wireless transmission are shortened, decreasing the iterations necessary to insure accurate communications. The codewords are shortened by adding known bits in predetermined locations in the last data symbol of a packet.

Abstract: A system and method of transmitting a stream of data are provided. A stream of data to be transmitted is identified. The stream of data is divided into a plurality of data segments for transmission on a corresponding plurality of transmission channels. The plurality of segments are transmitted on the corresponding plurality of transmission channels, wherein each segment is transmitted at substantially the same time as the other segments and for substantially the same duration of time.

Abstract: Embodiments of communication roaming systems and methods are disclosed. One method embodiment, among others, comprises sending a frame to a station based on an identifier of the station to prompt an immediate response frame, and determining whether the station is suitable for association based on information corresponding to receipt of the immediate response frame or based on non-receipt of the immediate response frame.

Abstract: An adaptive frequency equalization system providing an equalizer that has programmable taps that adjusts magnitude and phase of symbol information of a received signal and that provides equalized symbol information. The system includes a hard decision circuit that selects ideal symbol values using the equalized symbol information. A frequency response circuit determines frequency response update values using the ideal symbol values and the received signal. An adjust circuit updates stored frequency response information using the frequency response update values, and also updates the programmable taps of the equalizer using the stored frequency response information.

Abstract: A technique to allow enhanced stations and legacy stations to work with each other without the inefficiencies of signaling overhead in the prior art is disclosed. An enhanced station transmits an initial, short frame using a modulation compatible with legacy stations. The frame sets the duration for a frame exchange—consisting of a data frame, followed by acknowledgement frame—in which the data frame is transmitted using an enhanced modulation format. The duration specified in the transmitted initial frame covers the time interval of the subsequent frame exchange. All stations, including legacy stations, listen in on the frame exchange and refrain subsequently from transmitting spontaneously for the time interval covered by the duration. Alternatively, the frame exchange can comprise multiple data frames with corresponding acknowledgement frames. The enhanced station can also transmit, during the remaining frame exchange, one or more intermediate frames that indicate duration.

Abstract: Disclosed herein are exemplary techniques for initiating a direct wireless link between two wireless devices. The method includes transmitting, a first frame from a first wireless device having a destination media access control (MAC) address; receiving, at the first wireless device, a second frame from a second wireless device, the second frame having a destination MAC address and being intended for a wireless device other than the first wireless device; and establishing a direct wireless link between the first wireless device and the second wireless device when the when the destination MAC address of the first frame matches the destination MAC address of the second frame.

Abstract: Methods and systems for transmitter diversity expansion are provided. The methods and systems include steps and modules for applying a number of data streams (K) to a larger number of antennas (N). This is performed by applying each of the data streams to a single base antenna, such that K data streams are applied to K base antennas, and by shifting and combining the K data streams to produce N-K data streams to apply to N-K extension antennas.

Abstract: Systems and methods for enabling wireless devices to discover a number of other proximate wireless devices are disclosed. The discovery may include the discovery of network configuration parameters useful for establishing a connection between the wireless devices. The disclosed systems and methods for device discovery may operate in a number of different modes to timely discover wireless devices that receive communications continuously, as well as wireless devices that turn off their wireless receivers for intermittent periods of time. The wireless devices may, for example, communicate using the IEEE 802.11 protocol.

Abstract: Disclosed herein are techniques for power management in wireless networks. Based upon receipt of an indication of the link margin of a receiving wireless device, a transmitting wireless device may adjust its transmit power commensurate with the link margin. The indication of the link margin may be transmitted from the receiving wireless device to the transmitting wireless device periodically. Alternatively, the receiving wireless station may provide the indication of the link margin in response to information received from the transmitting wireless device. In this instance, the indication of the link margin may be included in a piggyback acknowledgement (ACK) frame conventionally used to acknowledge receipt of the information transmitted by the transmitting wireless station.

Abstract: Systems and methods for connection and remote configuration of wireless nodes communicating on a shared-communications channel. A master node includes a processor configured to generate a frame including configuration information designating network configuration parameters for configuring a remote wireless node for network communications. The master node transmits the frame over the shared communication channel to a slave node to be configured. The slave node includes a receiver for receiving the frame from the master node on the shared communication channel. The slave node includes a processor for configuring the wireless node to communicate according to the network configuration parameters designated by the configuration information in the frame.

Abstract: Methods and systems for transmitter diversity expansion are provided. The methods and systems include steps and modules for applying a number of data streams (K) to a larger number of antennas (N). This is performed by applying each of the data streams to a single base antenna, such that K data streams are applied to K base antennas, and by shifting and combining the K data streams to produce N-K data streams to apply to N-K extension antennas.

Abstract: A decision directed flicker noise canceller for reducing flicker noise in a modulated input signal according to an embodiment of the present invention includes a decision circuit, a conversion circuit, first and second adders and a filter. The decision circuit provides signal decisions based on the input signal. The conversion circuit provides selected signal values based on the signal decisions. The first adder subtracts the selected signal values from signals based on the input signal to provide a flicker noise estimate. The filter receives and filters the flicker noise estimate and the second adder subtracts the filtered flicker noise estimate from the input signal and provides a corrected input signal. In a feedback configuration, the second adder is located in a feedback position before the decision circuit in the signal processing path. In a feed-forward configuration, the second adder is located in a feed-forward position after the decision circuit.

Abstract: Included are embodiments for communicating data using a plurality of formats. At least one embodiment of a method includes transmitting a plurality of first format data frames with a predetermined time period between transmitted first format data frames and determining a duration of the time period between the transmitted first format data frames. Similarly, some embodiments include fragmenting a second format data frame into a plurality of second format subframes such that the second format subframes may be transmitted during the time period between the transmitted first format data frames.

Abstract: A technique is disclosed that enables both an IEEE 802.11 transceiver and a Bluetooth transceiver to be employed in a single wireless telecommunication station (e.g., a device supporting a wireless telephone, personal digital assistant, etc.) without interfering on each other. In particular, the illustrative embodiment enables standard “off-the-shelf” IEEE 802.11 and Bluetooth transceivers to work in a coordinated fashion in a single telecommunications terminal. In the illustrative embodiment, a Bluetooth transceiver gains access to a shared-communications channel from an IEEE 802.11 transceiver by requesting access, even if the access is not immediate. The technique disclosed is also applicable to communications protocols other than IEEE 802.11 and Bluetooth.

Abstract: An interface between radios supporting different air interfaces is disclosed that avoids some of the costs and disadvantages associated with inter-radio interfaces in the prior art. The present invention enables the needed coordination across multiple wireless protocols, such as 802.11 and Bluetooth, by providing a communication link spanning different integrated circuits when each radio is on a separate integrated circuit. This low cost, low complexity link can be added to standard integrated circuits produced by individual companies without adding appreciably to the overall cost of the integrated circuits.