Abstract:
Systems and techniques are disclosed relating to wireless communications. The systems and techniques involve wireless communications wherein a process, module or communications terminal schedules communications over a frame having a plurality of time slots. The process, module or communications terminal may be used to assign information to be transmitted between two terminals to a block of the time slots within a frame, and reordering the time slot assignments within the frame using a permutation function, the permutation function being a function of frame count.
Abstract:
An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on frequency spectrum information. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth. In one example, the frequency spectrum information includes a status of an internal secondary radio. The frequency spectrum information may also indicate a region of operation where the frequency response is selected in accordance with the region.
Abstract:
In embodiments, an adaptive tone erasure technique is applied to orthogonal frequency division multiplexing (OFDM) communications, such as ECMA-368 standard ultra-wideband (UWB) communications. A transmitter obtains jammed sub-carrier information and calculates an erasure mask. The jammed sub-carriers are nulled before transmitting to a receiver. In accordance with the erasure mask, bits falling on the jammed sub-carriers are replaced by erasure bits before interleaving, keeping the interleaver block size constant notwithstanding variations in the number of the jammed sub-carriers. The receiver also obtains the jammed sub-carrier information and the erasure mask. After the receiver deinterleaves the constant size blocks, it decodes the data without the erasure bits. The transmitter may detect the jammed sub-carriers itself, or obtain the information from the receiver. The receiver similarly may detect the jammed sub-carriers itself, or obtain the information from the transmitter.
Abstract:
An apparatus (1600) for detecting an OFDM symbol encoded with a transmitted sequence including a filter (1604) having coefficients based on a simplified version of the transmitted sequence is disclosed. A computer program product having code and a wireless communications apparatus for performing the method are also described herein.
Abstract:
Systems and methods are provided for minimizing power consumption in a wireless mobile device. In one embodiment, a computer implemented method is provided that facilitates utilization of resources of a mobile device. This includes identifying available resources of a device and dynamically disabling or enabling subsets of the resources as a function of at least a channel estimation to improve or optimize performance of the device.
Abstract:
Embodiments describe reducing interference in a wireless communication network, including an ad hoc network. According to an embodiment, a method for reducing interference includes receiving a data packet and determining a channel quality level of the received data packet. The method further includes calculating a number of groups to divide the data packet into based on the channel quality level and determining a slot position within each group. The positioning of an acknowledgment channel within each group can be optimized to reduce the amount of overhead channels or to provide time to decode a traffic channel.