Freescale Semiconductor,inc.

Mcnc Research & Development Institute

Paul Robert Runkle

Richard D Roberts

Timothy R Miller

John W McCorkle

William Shvodian

Deepak Joseph

Matthew L Welborn

Adrian R Macias

Sarah Vargas-Hurlston

Douglas E Price

A method is provided for receiving a data frame in an ultrawide bandwidth network. In this method, a device receives an ultrawide bandwidth signal containing a data frame. The device then performs an acquisition operation during a first preamble in the data frame, and identifies a marker after the first preamble that indicates that the first preamble has ended. After this, the device performs a signal processing operation during a second preamble in the data frame. After the training, the device then receives a header in the data frame, and then receives a payload in the data frame. By having a marker between the two preambles, this method provides a receiving device with critical information regarding the timing of the preamble section of a frame.

System and method for passing data frames in a wireless network

A device for detecting data synchronization in data communications includes pseudorandom noise (PN) lock circuits (). The PN lock circuits () receive an input data stream (). Each of the PN lock circuits () is time offset with respect to the other PN lock circuits. Each of the PN lock circuits () outputs a PN sequence responsive to the input data stream. For each PN lock circuit, there is provided a component () for comparing the PN sequence from the respective PN lock circuit to the input data stream, to determine whether the input data stream and the PN sequence are synchronized. An indication () that the data is synchronized is provided when the input data stream and the PN sequence are synchronized.

Pseudorandom noise lock detector

An equalizer and corresponding methods is arranged and constructed to mitigate adverse effects of a wireless channel (). The equalizer includes a delay line () coupled to an input signal () and comprising a delay circuit coupled to an output combiner () that is operable to provide an interim signal (g. . . gN) and a feed forward circuit () coupled to the delay line and operable to provide a feed forward signal () that comprises a hard decision scaled according to a scaling factor corresponding to an estimate of channel parameters, wherein the output combiner is operable to combine the feed forward signal and the interim signal to provide an output signal () that is compensated for an adverse effect of the wireless channel on the input signal.

Decision feed forward equalizer system and method

A process is provided for determining the distance between two devices by sending ranging packets between them. The local device sends a first ranging packet, which the remote device sends holds for a first hold time before sending a second ranging packet in return. The local device also sends a third ranging packet, which the remote device sends holds for a second hold time before sending a fourth ranging packet in return. If the second hold time is twice the first hold time, then the propagation time for signals between the two devices can be determined solely by time measurements made by the local device. For received signals, these time measurements can be adjusted to provide accurate time estimates for a direct line of sight signal, which corresponds to a shortest transmission distance between the two devices. The propagation time can then be used to determine distance between the devices.

Method and system for performing ranging functions in an ultrawide bandwidth system

A wireless communication base station consistent with certain embodiments of the present invention collects user transmissions and creates and maintains a database storing data that relates communication parameters to a geographic location. A base station receiver receives data packets containing data describing a geographic location of a mobile communication node. The base station predicts a future geographic location of the mobile communication node, and transmits communication parameters to the mobile communication node associated with the predicted future geographic location. The mobile communication node consistent with certain embodiments of the invention has a GPS positioning device that determines a geographic location of the communication node. A transceiver transmits data representing the geographic location and receives data representing communication parameters determined as a function of the data representing the geographic location. The mobile communication node adjusts its communication parameters in response thereto for the predicted geographic location.

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Durham, NC, United States of America

Paul Robert Runkle