Abstract: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention also provides methods and apparatus for encoding digital data and communicating the digital data using self-inverting turbo code interleavers/de-interleavers.

Abstract: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention also provides methods and apparatus for encoding digital data and communicating the digital data using self-inverting turbo code interleavers/de-interleavers.

Abstract: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention also provides methods and apparatus for encoding digital data and communicating the digital data using self-inverting turbo code interleavers/de-interleavers.

Abstract: A wireless device (e.g. an access point) is adapted to communicate wirelessly with a class 1 device and a class 2 device, wherein the class 2 device is capable of communicating in a manner that is not compatible with the class 1 device. The wireless device may comprise host logic, an antenna, and a MAC coupled the host logic and the antenna. The MAC may cause the wireless device to emit a poll that is recognized differently by the class 1 device as compared to the class 2 device and that causes the wireless device to operate for a reserved period of time in which the class 2 device can communicate in a manner that is not compatible with the class 1 device.

Abstract: Narrowband interference can seriously degrade the overall performance of a communications network without significantly damaging a large percentage of the communications network's transmissions. In a single tone communications network, narrowband interference can reduce the overall signal-to-noise ratio to a level such that a receiver can no longer accurately decode the received transmission. However, the receiver's filters and equalizers often can filter out the effects of the narrowband interference and the receiver can accurately decode the received transmission if the receiver can restart the decoding at the point when the narrowband interference began interfering with the transmission. A technique using sequential decoding with backtracking and adaptive equalization permits the receiver to adapt to the presence of the narrowband interference and backtrack the decoding to a point prior to the interference.

Abstract: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention also provides methods and apparatus for encoding digital data and communicating the digital data using self-inverting turbo code interleavers/de-interleavers.

Abstract: A wireless device comprises host logic, network interface logic, and an antenna. The network interface logic transmits symbols containing a plurality of data tones and wherein the network interface logic varies the number of data tones among the symbols within a packet.

Abstract: Encoded information in a data network may be decoded using a value, indicative of the communication channel, obtained from the information to be decoded as well as at least one other value, also indicative of the communication channel, obtained from previously decoded information. By using a channel indicating value obtained from previously decoded information, a better performing decoding process may be obtained.

Abstract: A wireless device (e.g. an access point) is adapted to communicate wirelessly with a class 1 device and a class 2 device, wherein the class 2 device is capable of communicating in a manner that is not compatible with the class 1 device. The wireless device may comprise host logic, an antenna, and a MAC coupled the host logic and the antenna. The MAC may cause the wireless device to emit a poll that is recognized differently by the class 1 device as compared to the class 2 device and that causes the wireless device to operate for a reserved period of time in which the class 2 device can communicate in a manner that is not compatible with the class 1 device.

Abstract: An electronic device may receive a packet comprising a plurality of codewords comprising pre-processing logic, a first decoder, and a second decoder. The pre-processing logic causes some of said codewords to be provided to the first decoder and other of said codewords to be provided to the second decoder. The codewords may be of different lengths and/or different code rates. Further, the first and second decoders may implement the same or different decoding technique.

Abstract: A method 10 is provided to incorporate bit loading into a proprietary or other nonstandard mode, but with the constraint that all transmitted signals are valid packets that adhere to the standard in the sense that the transmitted signals could all arise in the regular standard. That is, it is desirable to confine the nonstandard nature of the transmission to the mapping of data bits to the transmitted waveform, rather than allow new transmission waveforms.

Abstract: The present invention provides methods for generating self-inverting turbo code interleavers having high separation and high dispersion characteristics. Methods are provided for deterministically generating self-inverting turbo code interleavers from a specification for an existing non-self-inverting interleaver. Methods are also provided for randomly generating self-inverting turbo code interleavers. The present invention also provides methods and apparatus for encoding digital data and communicating the digital data using self-inverting turbo code interleavers/de-interleavers.

Abstract: Narrowband interference can seriously degrade the overall performance of a communications network without significantly damaging a large percentage of the communications network's transmissions. In a single tone communications network, narrowband interference can reduce the overall signal-to-noise ratio to a level such that a receiver can no longer accurately decode the received transmission. However, the receiver's filters and equalizers often can filter out the effects of the narrowband interference and the receiver can accurately decode the received transmission if the receiver can restart the decoding at the point when the narrowband interference began interfering with the transmission. A technique using sequential decoding with backtracking and adaptive equalization permits the receiver to adapt to the presence of the narrowband interference and backtrack the decoding to a point prior to the interference.