公开(公告)号：US10088592B1

公开(公告)日：2018-10-02

申请号：US15485125

申请日：2017-04-11

Applicant: SeeScan Inc.

Inventor： Mark S. Olsson ,  Hunter Brown ,  Stephanie M. Bench ,  Justin W. Taylor ,  Jan Soukup

IPC: G01B7/14 ,  G01V3/10 ,  G01S19/13 ,  G01V3/165 ,  G01V3/08

Abstract: Inductive clamps for use in utility locate operations for inductively coupling current signals from a transmitter to a hidden or buried conductor are disclosed.

公开(公告)号：US10027526B2

公开(公告)日：2018-07-17

申请号：US15425785

申请日：2017-02-06

Applicant: SeeScan Inc.

Inventor： Stephanie M. Bench ,  Roger B. Shaffer

IPC: H04N7/12 ,  H04L27/36 ,  H04L27/34

CPC classification number: H04L27/362 ,  H04L27/3455 ,  H04L27/3818

Abstract: Methods and apparatus for wired communications are disclosed. A method for transmitting a data stream through a wired communications channel includes encoding the data stream to produce a first baseband modulating signal I(t) and a second baseband modulating signal Q(t) whose amplitudes together represent a time series of complex symbols (I, Q) each selected from a two-dimensional (2-D) constellation of symbols distributed on the phase plane about the origin such that at least one of the baseband modulating signals has a substantially non-zero mean amplitude, modulating the baseband signals I(t) and Q(t) to produce a modulated signal, wherein the I(t) and Q(t) components of the modulated signals are generally fixed in quadrature, and providing the modulated signal to a wired communications channel.