Method and apparatus for synchronizing a radio telemetry system by way of transmitted-reference, delay-hopped ultra-wideband pilot signal
First Claim
1. A method for synchronizing a radio telemetry system using radio frequency (RF) burst communications comprising the steps of:
- generating at a base station a transmitted-reference (TR) pilot signal transmission, wherein the TR pilot signal is delay-hopped to provide a transmitted-reference, delay-hopped (TR/DH) pilot signal comprising a code word comprising chips, wherein the chips are transmitted sequentially, in a fixed duration, Tc, and each chip comprises pulse pairs;
transmitting by the base station the TR/DH pilot signal to a plurality of mobile devices in the radio telemetry system;
using the TR/DH pilot signal, a TR/DH receiver, and time-of-arrival estimator in each of the plurality of mobile devices to acquire synchronization with the base station;
generating and buffering telemetry data at each of the plurality of mobile devices; and
transmitting by each of the plurality of mobile devices telemetry data at a predetermined time after synchronization with the base station.
1 Assignment
0 Petitions
Accused Products
Abstract
A time-division-multiplexed radio communication system and method uses transmitted-reference, delay-hopped (TR/DH) ultra-wideband (UWB) broadcast signal to provide a pilot signal to all mobile devices in a coverage area from which time synchronization is derived. Using this TR/DH UWB pulse pilot signal and low-complexity demodulation in the mobile devices, the mobile devices utilize a simple signal detection algorithm to acquire synchronization with the pilot signal. As a result, all devices in a local area network become synchronized to the system'"'"'s bit clock. This greatly reduces the search space required for signal acquisition, receiver signal processing complexity, and length of message preambles required to synchronize the base station receiver to a transmission from any of the mobile devices.
-
Citations
38 Claims
-
1. A method for synchronizing a radio telemetry system using radio frequency (RF) burst communications comprising the steps of:
-
generating at a base station a transmitted-reference (TR) pilot signal transmission, wherein the TR pilot signal is delay-hopped to provide a transmitted-reference, delay-hopped (TR/DH) pilot signal comprising a code word comprising chips, wherein the chips are transmitted sequentially, in a fixed duration, Tc, and each chip comprises pulse pairs; transmitting by the base station the TR/DH pilot signal to a plurality of mobile devices in the radio telemetry system; using the TR/DH pilot signal, a TR/DH receiver, and time-of-arrival estimator in each of the plurality of mobile devices to acquire synchronization with the base station; generating and buffering telemetry data at each of the plurality of mobile devices; and transmitting by each of the plurality of mobile devices telemetry data at a predetermined time after synchronization with the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A radio telemetry system using radio frequency (RF) burst communications comprising:
-
a pilot signal generator at a base station for generating a transmitted-reference (TR) pilot signal, wherein the TR pilot signal is delay-hopped to provide a transmitted-reference, delay-hopped (TR/DH) pilot signal, the base station broadcasting the TR/DH pilot signal to a plurality of mobile devices, the TR/DH pilot signal comprising a code word comprising chips, wherein the chips are transmitted sequentially, in a fixed duration, Tc, and each chip comprises pulse pairs; a TR/DH receiver and time-of-arrival estimator at each of the plurality of mobile devices for detecting the TR/DH pilot signal and using the TR/DH pilot signal to acquire synchronization with the base station; a data buffer for temporarily storing telemetry data at each of the plurality of mobile devices; and a transmitter at each of the plurality of mobile devices for transmitting buffered telemetry data at a predetermined time after synchronization with the base station. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A mobile device for a radio telemetry system comprising:
-
a receiver for detecting a transmitted-reference, delay-hopped (TR/DH) pilot signal to acquire synchronization with a central transmitter based on a periodic epoch in the TR/DH pilot signal, wherein the TR/DH pilot signal comprises a code word comprising chips, the chips are transmitted sequentially, in a fixed duration, Tc, and each chip comprises pulse pairs; a buffer for temporarily storing telemetry data; and a transmitter for transmitting buffered telemetry data at a predetermined time after synchronization with the central transmitter. - View Dependent Claims (23, 24, 25, 26, 27)
-
-
28. A method for synchronizing a radio telemetry system, comprising:
synchronizing a plurality of mobile devices with a base station based on a periodic bit-time epoch carried by a delay-hopped pilot signal originating from the base station, the delay-hopped pilot signal comprising a code word having chips transmitted sequentially in a fixed duration, each chip comprising pulse pairs. - View Dependent Claims (29, 30)
-
31. A system for synchronizing a radio telemetry system, comprising:
-
a computer-readable medium; and code disposed on the computer-readable medium, wherein the code is configured to synchronize a remote device with a base station based on a periodic bit-time epoch carried by a delay-hopped pilot signal originating from the base station, the delay-hopped pilot signal comprising a code word having chips transmitted sequentially in a fixed duration, each chip comprising pulse pairs. - View Dependent Claims (32, 33)
-
-
34. A method for synchronizing a radio telemetry system using radio frequency (RF) burst communications comprising the steps of:
-
generating at a base station a transmitted-reference (TR) pilot signal transmission, wherein the TR pilot signal is delay-hopped to provide a transmitted-reference, delay-hopped (TR/DH) pilot signal comprising two noise signals transmitted for a time period of duration Tc; transmitting by the base station the TR/DH pilot signal to a plurality of mobile devices in the radio telemetry system; using the TR/DH pilot signal, a TR/DH receiver, and time-of-arrival estimator in each of the plurality of mobile devices to acquire synchronization with the base station; generating and buffering telemetry data at each of the plurality of mobile devices; and transmitting by each of the plurality of mobile devices telemetry data at a predetermined time after synchronization with the base station.
-
-
35. A radio telemetry system using radio frequency (RF) burst communications comprising:
-
a pilot signal generator at a base station for generating a transmitted-reference (TR) pilot signal, wherein the TR pilot signal is delay-hopped to provide a transmitted-reference, delay-hopped (TR/DH) pilot signal, the base station broadcasting the TR/DH pilot signal to a plurality of mobile devices, the TR/DH pilot signal comprising two noise signals transmitted for a time period of duration Tc; a TR/DH receiver and time-of-arrival estimator at each of the plurality of mobile devices for detecting the TR/DH pilot signal to acquire synchronization with the base station; a data buffer for temporarily storing telemetry data at each of the plurality of mobile devices; and a transmitter at each of the plurality of mobile devices for transmitting buffered telemetry data at a predetermined time after synchronization with the base station.
-
-
36. A mobile device for a radio telemetry system comprising:
-
a receiver for detecting a transmitted-reference, delay-hopped (TR/DH) pilot signal to acquire synchronization with a central transmitter based on a periodic epoch in the TR/DH pilot signal, wherein the TR/DH pilot signal comprises two noise signals transmitted for a time period of duration Tc; a buffer for temporarily storing telemetry data; and a transmitter for transmitting buffered telemetry data at a predetermined time after synchronization with the central transmitter.
-
-
37. A method for synchronizing a radio telemetry system, comprising:
synchronizing a plurality of mobile devices with a base station based on a periodic bit-time epoch carried by a pilot signal originating from the base station, the pilot signal comprising at least two noise signals having a transmission time duration.
-
38. A system for synchronizing a radio telemetry system, comprising:
-
a computer-readable medium; and code disposed on the computer-readable medium, wherein the code is configured to synchronize a remote device with a base station based on a periodic bit-time epoch carried by a pilot signal originating from the base station, the pilot signal comprising at least two noise signals having a transmission time duration.
-
Specification