Wavetronix LLC

3com Corporation

John Bernard Dougall, Jr

David V Arnold

Jonathan L Waite

Thomas W Karlinsey

Ryan Lee Smith

Logan Carl Harris

Michael A Jensen

Brian David Petry

Bryan Robert Jarrett

John R Rosenlof

Kevin J Smart

Bradley Curtis Giles

A vehicle traffic sensor for detecting and monitoring vehicular targets is presented. The sensor employs a planar design resulting in a reduced profile sensor. The sensor includes a multi-layer radio frequency board with RF components on one of the sides and both isolation and planar array antennas on the opposing side. The antennas are preferably tapered planar array antennas which include one transmit antenna and one receive antenna. The sensor also includes at least one logic or signal processing board populated with components on a first side and a ground plane on a second side positioned toward the RF componentry of the RF board to form an RF shield. The boards are housed within a housing that is permeable, at least on the side through which the antenna structures propagate.

Vehicular traffic sensor

Systems and methods for measuring the speed and/or direction of a target such as a vehicle in a field of view. The speed of a vehicle is measured using distance measurements, phase measurements, or Doppler shift measurements using a single transducer side fire configured sensor. The speed of a vehicle can be measured using laterally spaced transducers in a side fire or off angle configuration and using a single transducer sensor in a forward fire configuration.

Systems and methods for monitoring speed

A correlator for use in a timing recovery apparatus of a receiver in a multicarrier transmission system. The correlator locates the beginning of a data frame and initializes a pointer register with an address to a location within the receive signal buffer. Data is transferred to a signal converter from the receive signal buffer where the samples that are fed into the converter are determined by the address stored in the pointer register.

Correlation based method of determining frame boundaries of data frames that are periodically extended

A contention resolution media access control protocol for a local area network (LAN) using orthogonal frequency division multiplexing (OFDM). The protocol takes advantage of OFDM frames available on the channel physical layer. Each LAN node is assigned a LAN-unique node identifier that is the index of a Fast-Fourier transform (FFT) frequency bin or other discrete tone in the free band. The node identifier is played in each contention cycle by each node that has data to transmit. Each contending node can easily determine which nodes are contending for transfer of data over the media channel from the presence of node identifiers within distinct frequency bins. Contention for the media channel is resolved by each contending node being giving access to the media channel in accordance with a preset order in which contending nodes will transmit.

Channel reservation media access control protocol using orthogonal frequency division multiplexing

Growing community of inventors

Highland, UT, United States of America

John Bernard Dougall, Jr