Mode Controller for signal acquisition and tracking in an ultra wideband communication system
First Claim
1. A method for controlling in an ultra wide bandwidth (UWB) receiver transitions between synchronization states that include an acquisition mode and a tracking mode, comprising the steps of:
- identifying an in-band measure of a signal to noise ratio of an incoming UWB signal;
comparing the in-band measure of signal to noise ratio identified in the identifying step with an in-band signal to noise ratio threshold;
transitioning between the acquisition mode and the tracking mode when in the comparing step it is determined that the in-band measure of signal to noise ratio has satisfied a predetermined criteria relative to in-band signal to noise ratio threshold; and
setting a number of samples of the incoming UWB signal to a predetermined number so as to controllably establish a predetermined performance level with regard to when to control a transition between the acquisition mode and the tracking mode.
25 Assignments
0 Petitions
Accused Products
Abstract
A system and method for controlling the mode of operation in a UWB receiver. In one variation, the system and method determines the mode of operation by reading a set number of samples of the signal, estimating mode parameters, calculating a mode probability, and then transitioning in a finite state machine from either a tracking to an acquisition state or vice versa depending on the value of the mode probability. Exemplary versions of the mode controller include a signal to noise ratio calculator, a signal and noise power estimator, and an AGC initialization circuit.
-
Citations
78 Claims
-
1. A method for controlling in an ultra wide bandwidth (UWB) receiver transitions between synchronization states that include an acquisition mode and a tracking mode, comprising the steps of:
-
identifying an in-band measure of a signal to noise ratio of an incoming UWB signal; comparing the in-band measure of signal to noise ratio identified in the identifying step with an in-band signal to noise ratio threshold; transitioning between the acquisition mode and the tracking mode when in the comparing step it is determined that the in-band measure of signal to noise ratio has satisfied a predetermined criteria relative to in-band signal to noise ratio threshold; and setting a number of samples of the incoming UWB signal to a predetermined number so as to controllably establish a predetermined performance level with regard to when to control a transition between the acquisition mode and the tracking mode. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for controlling in an ultra wide bandwidth (UWB) receiver transitions between synchronization states that include an acquisition mode and a tracking mode, comprising the steps of:
-
identifying at least two parameters that combine to form an indirect measure of a signal to noise ratio of an incoming UWB signal; determining a control threshold parameter from a mathematical combination of the at least two parameters; transitioning between the acquisition mode and the tracking mode when the control threshold is set to a predetermined value; and setting a number of samples of the incoming UWB signal to a predetermined number so as to controllably establish a predetermined performance level with regard to when to control a change between the acquisition mode and the tracking mode. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A method for switching between an acquisition mode and a tracking mode in an ultra wide bandwidth (UWB) receiver, comprising the steps of:
-
monitoring an amplitude of an incoming UWB signal; determining a state parameter from the amplitude based on a noise variance of the incoming UWB signal determined during automatic gain control (AGC) initialization; and controlling a transition from the acquisition mode to the tracking mode when the state parameter is set to a predetermined value. - View Dependent Claims (26, 27, 28, 29)
-
-
30. A mode controller for switching between an acquisition mode and a tracking mode of an ultra wide bandwidth (UWB) receiver, comprising:
-
an acquire state machine configured to determine when an incoming UWB signal is acquired by said UWB receiver; a track state machine configured to maintain synchronization with the incoming UWB signal after the UWB signal has been acquired in said acquire state machine; a control mechanism configured to control a transition between the acquire state machine and the track state machine when an in-band measure of signal to noise ratio satisfies a predetermined condition; and a setting mechanism for setting a length of samples of the incoming UWB signal to a predetermined number so a transition between the acquire and track state machines occurs with a predetermined performance accuracy. - View Dependent Claims (31, 32)
-
-
33. A controller configured to control when to switch between an acquisition mode and a tracking mode in an ultra wide bandwidth (UWB) receiver, comprising:
-
means for identifying an in-band measure of a signal to noise ratio of an incoming UWB signal; means for comparing the in-band measure of signal to noise ratio with an in-band signal to noise ratio threshold; means for controlling a transition between the acquisition mode and the tracking mode when said means for comparing identifies that the in-band measure of signal to noise ratio has satisfied a predetermined criteria; and means for setting a vector length of samples of the incoming UWB signal to a predetermined number so a transition between modes occurs with a predetermined performance accuracy. - View Dependent Claims (34)
-
-
35. A controller configured to control when to switch between an acquisition mode and a tracking mode in an ultra wide bandwidth (UWB) receiver, comprising:
-
means for identifying at least two parameters that are an indirect measure of a signal to noise ratio of an incoming UWB signal; means for determining a control threshold parameter L from a mathematical combination of the at least two parameters; means for transitioning between the acquisition mode and the tracking mode when the control threshold parameter L is set to a predetermined value by said means for determining; and means for setting a number of samples of the incoming signal to a predetermined number so as to controllably establish a predetermined performance level with regard to when to implement a change between the acquisition mode and the tracking mode. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 78)
-
-
44. A controller configured to control when to switch between an acquisition mode and a tracking mode in an ultra wide bandwidth (UWB) receiver, comprising:
-
means for monitoring an amplitude of an incoming UWB signal; means for determining a state parameter from the amplitude based on a noise variance of the incoming UWB signal determined during automatic gain control (AGC) initialization; and mean for controlling a transition from the acquisition mode to the tracking mode when the state parameter is set to a predetermined value. - View Dependent Claims (45, 46, 47)
-
-
48. A mode controller for switching between an acquisition mode and a tracking mode of an ultra wide bandwidth (UWB) receiver, comprising:
-
means for determining when an incoming UWB signal is acquired by said UWB receiver; means for maintaining synchronization with the incoming UWB signal after the UWB signal has been acquired in said means for determining; means for estimating an in-band signal to noise ratio; means for controlling a transition between the acquisition mode and the tracking mode when the estimate of signal to noise ratio satisfies a predetermined condition; and means for setting a length of samples of the incoming UWB signal to a predetermined number so a transition between modes occurs with a predetermined performance accuracy.
-
-
49. An ultra wide bandwidth (UWB) receiver configured to transition between an acquisition mode and a tracking mode, comprising:
-
an analog to digital converter configured to sample an incoming UWB signal; a processor; a computer program product having computer readable instructions that when executed by the processor perform steps of identifying an in-band measure of a signal to noise ratio of an incoming UWB signal; comparing the in-band measure of signal to noise ratio identified in the identifying step with an in-band signal to noise ratio threshold; transitioning between the acquisition mode and the tracking mode when in the comparing step it is determined that the in-band measure of signal to noise ratio has satisfied a predetermined criteria relative to in-band signal to noise ratio threshold; and setting a vector length of samples of the incoming UWB signal to a predetermined number so a transition between modes will occur with in a predetermined reception performance metric. - View Dependent Claims (50, 51, 52, 53, 54)
-
-
55. An ultra wide bandwidth (UWB) receiver configured to transition between an acquisition mode and a tracking mode during synchronization operations, comprising:
-
an analog to digital converter configured to sample an incoming UWB signal; a processor; a computer program product having computer readable instructions that when executed by the processor perform steps of identifying at least two parameters that are an indirect measure of a signal to noise ratio of an incoming UWB signal, determining a control threshold parameter from a mathematical combination of the at least two parameters, transitioning between the acquisition mode and the tracking mode when the control threshold is set to a predetermined value in said determining step; and a data detector configured to detect data included in the incoming UWB signal; and setting a number of samples of the incoming signal to a predetermined number so as to controllably establish a predetermined performance level with regard to when to control a change between the acquisition mode and the tracking mode. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
-
-
73. An ultra wide bandwidth (UWB) receiver configured to switch between an acquisition mode and a tracking mode during reception of an incoming UWB signal, comprising:
-
an analog to digital converter configured to sample the incoming UWB signal; a processor; a computer program product having computer readable instructions that when executed by the processor perform steps of monitoring an amplitude of the incoming UWB signal, determining a state parameter from the amplitude based on a noise variance of the incoming UWB signal determined during automatic gain control (AGC) initialization, and controlling a transition from the acquisition mode to the tracking mode when the state parameter is set to a predetermined value; and a data detector configured to detect data in the incoming UWB signal. - View Dependent Claims (74, 75, 76, 77)
-
Specification