| Patent application number | Description | Published |
|---|
| 20080259891 | MULTIPLE PACKET SOURCE ACKNOWLEDGEMENT - A multi-bit acknowledgement word ( | 10-23-2008 |
| 20080285534 | Different Orthogonal Code Sets with Members in Common - A first orthogonal codeset, obtainable in various manners, is used in a first cell to provide orthogonal spreading codes for traffic signals originating within the first cell. A second orthogonal code set for use in a second cell is obtained that has at least a first code in common with the first orthogonal code set by selecting any code in the first codeset to be the first common code. The plural orthogonal codesets can be utilized in various ways and in various environments. For example, the plural orthogonal codesets can be used for operation of a user equipment unit in a code division multiple access (CDMA) network. | 11-20-2008 |
| 20080291821 | ORTHOGONAL SPREAD-SPECTRUM WAVEFORM GENERATION WITH NON-CONTIGUOUS SPECTRAL OCCUPANCY FOR USE IN CDMA COMMUNICATIONS - The technology in this application solves these problems (and others) and meets the desirable goals identified above (and others). The technology spreads a signal over an available discontinuous spectrum, such as a radio frequency band, so that the spread signal only occupies the non-contiguous spectrum. In this way, CDMA transmission and reception can be used in a fragmented or non-contiguous spectum that otherwise would not be useable for direct sequence spreading. Spreading over non-contiguous portions of spectrum is preferably performed without producing unacceptable interference in portions of unavailable spectrum located between the allowed spectrum. By avoiding unacceptable interference in portions of unavailable spectrum located between the allowed spectrum, the unavailable spectrum may be used by other users or services. | 11-27-2008 |
| 20080291977 | SAME FREQUENCY SATELLITE TERRESTRIAL RADIO BROADCAST - A satellite broadcasts radio programs to mobile and fixed receivers at various locations. Ground stations supplement the satellite broadcasts in areas where the satellite signal may be shadowed. Likewise, the satellite signal supplements the terrestrial transmissions in areas with marginal terrestrial signal strength. Ground stations and a satellite transmit the same digital symbol stream over a same frequency spectrum. The symbol streams arrive in each service area of the ground stations with a relative delay that is within a window for which a receiver is adapted to decode efficiently. Spectral efficiency is achieved by allowing the ground stations to share the same frequencies as the satellites. | 11-27-2008 |
| 20090003472 | METHOD AND APPARATUS FOR COMMUNICATING WITH ROOT-NYQUIST, SELF-TRANSFORM PULSE SHAPES - A communication system ( | 01-01-2009 |
| 20110080936 | ORTHOGONAL SPREAD-SPECTRUM WAVEFORM GENERATION WITH NON-CONTIGUOUS SPECTRAL OCCUPANCY FOR USE IN CDMA COMMUNICATIONS - The technology in this application spreads a signal over an available discontinuous spectrum, such as a radio frequency band, so that the spread signal only occupies the non-contiguous spectrum. In this way, CDMA transmission and reception can be used in a fragmented or non-contiguous spectrum that otherwise would not be useable for direct sequence spreading. Spreading over non-contiguous portions of spectrum is preferably performed without producing unacceptable interference in portions of unavailable spectrum located between the allowed spectrum. By avoiding unacceptable interference in portions of unavailable spectrum located between the allowed spectrum, the unavailable spectrum may be used by other users or services. | 04-07-2011 |
| 20110122767 | ORTHOGONAL VECTOR DSL - A wire-based infrastructure capable of delivering high data rates is described herein. A transmission system, reception system, and/or repeater uses wire-mapping code matrices to reduce interference in multi-wire cables to increase the data rate provided by such multi-wire cables. More particularly, code mapping matrices are applied to transmission and/or received input signals to generate a mapped signal for each output wire or corresponding to each input wire such that each mapped signal comprises a different combination of all of the input signals. Different ones of the wire-mapped signals are ultimately transmitted on different wires. In so doing, the present invention facilitates crosstalk reduction, and therefore, provides a technique that increases the data rate available on multi-wire cables. | 05-26-2011 |
| 20110150049 | MIMO CHANNEL LOOPBACK - A method and apparatus for efficiently providing a large volume of channel feedback, e.g., for OFDM MISO and MIMO systems, is described herein. To that end, a mapping unit in an OFDM transceiver maps channel feedback values, e.g., received reference signal values or channel estimates derived therefrom, on a one-to-one basis to individual transmission subchannels. More particularly, the mapping unit maps a feedback value, e.g., the received reference value or a channel estimate derived therefrom, to a single transmission subchannel of an outgoing OFDM signal. For example, the mapping unit may map the feedback value to an input of a frequency transform unit, such as an inverse discrete Fourier transform unit, to map the feedback value to a single transmission subchannel comprising an OFDM transmission subcarrier. The OFDM transceiver transmits the outgoing OFDM signal to the remote transceiver to provide the feedback value to the remote transceiver. | 06-23-2011 |
| 20110158361 | RADIO CHANNEL ANALYZER TO DETERMINE DOPPLER SHIFTS ACROSS MULTIPLE FREQUENCIES OF A WIDEBAND SIGNAL - A receiver and receive processing method described herein improves the accuracy of channel estimates by correcting for the assumption that the Doppler shift (or rate-of-change-of-delay) stays constant for each frequency within a signal bandwidth of a received signal. To that end, a receiver according to the present invention comprises a channel processor having multiple processing units. A first processing unit processes reference values (e.g., pilot signals) received for each of a plurality of frequencies within a signal bandwidth at a plurality of different signal times (or the complex propagation channel coefficients estimated therefrom) to determine a set of complex wave amplitudes either for each of multiple frequencies in the signal bandwidth or for each of the different signal times. A second processing unit subsequently processes the complex wave amplitudes to determine complex scattering coefficients, where each complex scattering coefficient corresponds to a respective scattering object in the wireless communication channel. | 06-30-2011 |
