Mode controller for signal acquisition and tracking in an ultra wideband communication system
First Claim
Patent Images
1. A mode controller for determining a desired operation mode for acquisition or tracking of an incoming data signal, comprising:
- a data dependence removal element for receiving the incoming data signal and outputting a data-independent signal that indicates a strength of the incoming data signal independent of data contained in the incoming data signal;
a signal path comprisinga first processor for manipulating the data-independent signal to determine a first intermediate signal; and
a first non-linear function element for performing a non-linear function on the first intermediate signal to determine a signal parameter;
a noise-related path, comprisinga second non-linear function element for performing a non-linear function on the data-independent signal to determine a second intermediate signal;
a second processor for manipulating the second intermediate signal to determine a noise-related parameter; and
a third processor for processing the signal parameter and the noise-related parameter to determine a mode-controlling parameter indicative of the relative signal strength of the incoming data signal.
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Abstract
A system and method is provided 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 between a track and an acquisition state 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.
47 Citations
59 Claims
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1. A mode controller for determining a desired operation mode for acquisition or tracking of an incoming data signal, comprising:
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a data dependence removal element for receiving the incoming data signal and outputting a data-independent signal that indicates a strength of the incoming data signal independent of data contained in the incoming data signal; a signal path comprising a first processor for manipulating the data-independent signal to determine a first intermediate signal; and a first non-linear function element for performing a non-linear function on the first intermediate signal to determine a signal parameter; a noise-related path, comprising a second non-linear function element for performing a non-linear function on the data-independent signal to determine a second intermediate signal; a second processor for manipulating the second intermediate signal to determine a noise-related parameter; and a third processor for processing the signal parameter and the noise-related parameter to determine a mode-controlling parameter indicative of the relative signal strength of the incoming data signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A mode controller for determining a desired operation mode for acquisition or tracking of an incoming data signal, comprising:
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an absolute value element for receiving the incoming data signal and determining an absolute value of the incoming data signal; a signal path comprising a first filter for filtering the absolute value of the data signal to determine a first intermediate signal; and a first squarer for squaring the first intermediate signal to determine a signal parameter; a noise-related path, comprising a second squarer for squaring the absolute value of the incoming data signal to determine a second intermediate signal; and a second filter for filtering the second intermediate signal to determine a noise-related parameter; and a comparator for comparing the signal parameter and the noise-related parameter to determine a mode-controlling parameter indicative of the relative signal strength of the incoming data signal. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A mode controller for determining a desired operation mode for acquisition or tracking of an incoming data signal in an ultrawide bandwidth receiver, comprising:
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a signal path for determining a signal parameter of the incoming data signal; a noise-based path for determining a noise-based parameter of the incoming data signal; a processor for processing the signal parameter and the noise-related parameter to determine a mode-controlling parameter; and a controller for transitioning between an acquisition mode and a tracking mode based on the mode-controlling parameter. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59)
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Specification