System and method for baseband removal of narrowband interference in ultra wideband signals

Claim 2

A baseband RFI extraction mechanism configured to pass an ultra wideband (UWB) signal while suppressing a narrowband interference signal that overlaps said UWB signal in frequency and has been undersampled, comprising: a filter configured to identify a frequency of said narrowband interference signal after having been undersampled in order to extract said narrowband interference signal from said UWB signal at baseband, wherein said filter including a narrowband interference identification mechanism that is configured to identify the frequency of said narrowband interference signal and change filter parameters of said filter to suppress said narrowband interference signal at said frequency.

Claim 3

The baseband RFI mechanism of claim 1 , wherein said frequency is an alias frequency of said narrowband interfere signal and said filter is configured to identify and cancel a second frequency at which another alias of said narrowband interference signal is located.

Claim 4

A UWB receiver comprising: an A/D converter configured to digitize an incoming signal, said incoming signal including a narrowband interference signal and an ultra wideband (UWB) signal, said A/D converter having a predetermined sampling rate that is less than a Nyquist frequency for sampling said narrowband interference signal; an RFI extraction mechanism including a filter configured to identify and remove an undersampled version of said narrowband inference signal so as to improve a UWB signal to interference ratio; and a detector that detects data in said UWB signal after said RFI mechanism improves the UWB signal to interference ratio by suppressing the narrowband interference signal.

Claim 5

A UWB receiver comprising: an A/D converter configured to digitize an incoming signal, said incoming signal including a narrowband interference signal and an ultra wideband (UWB) signal, said A/D converter having a predetermined sampling rate that is less than a Nyquist frequency for sampling said narrowband interference signal; an RFI extraction mechanism including a filter configured to identify and remove an undersampled version of said narrowband inference signal so as to improve a UWB signal to interference ratio; and a detector that detects data in said UWB signal after said RFI mechanism improves the UWB signal to interference ratio by suppressing the narrowband interference signal.

Claim 6

A receiver as claimed in claim 3 , wherein the A/D converter is configured to undersample said narrowband signal and cause said narrowband signal to reside in a same frequency band in which baseband processing occurs on said UWB signal.

Claim 7

A receiver as claimed in claim 3 , wherein a sample rate of said A/D converter is adjustable to affect a completeness of extraction of said narrowband signal.

Claim 8

A receiver as claimed in claim 3 , wherein a quantization level at which said A/D converter digitizes said incoming signal is adjustable to affect a completeness with which extraction of said narrowband signal is achieved.

Claim 9

A receiver as claimed in claim 3 , wherein a vector length of said incoming signal is adjustable to affect a completeness with which extraction of said narrow band signal is achieved.

Claim 10

A receiver as claimed in claim 3 , wherein the A/D converter operates at a predetermined sample rate that is set to a multiple of a bit rate of data bits in said UWB signal.

Claim 11

A baseband RFI extraction mechanism for passing a desired UWB signal portion of an incoming signal while suppressing a narrowband interference signal that overlaps said desired UWB signal, comprising: a bit detector configured to detect bits encoded in the desired UWB signal; a subtraction mechanism configured to subtract a portion of the UWB signal having a detected bit contained therein from said incoming signal; an interference estimator configured to estimate the narrowband interference signal after said subtraction mechanism removed the portion of the UWB signal containing the bit from the incoming signal; and a filter configured to operate at baseband and extract said narrowband interference signal from a received signal, which is a down connected version of said incoming signal, based on the estimate of the narrowband interference signal made by the interference estimator.

Claim 12

A baseband RFI extraction mechanism for passing a desired UWB signal portion of an incoming signal while suppressing a narrowband interference signal that overlaps said desired UWB signal, comprising: a bit detector configured to detect bits encoded in the desired UWB signal; a subtraction mechanism configured to subtract a portion of the UWB signal having a detected bit contained therein from said incoming signal; an interference estimator configured to estimate the narrowband interference signal after said subtraction mechanism removed the portion of the UWB signal containing the bit from the incoming signal; and a filter configured to operate at baseband and extract said narrowband interference signal from a received signal, which is a down connected version of said incoming signal, based on the estimate of the narrowband interference signal made by the interference estimator.

Claim 13

A baseband RFI extraction mechanism as claimed in claim 9 , further comprising: a signal combiner configured to subtract said desired UWB signal from said incoming signal resulting in a residual narrowband interference signal.

Claim 14

A UWB receiver comprising: an A/D converter configured to digitize an incoming signal, said incoming signal including a narrowband interference signal and a UWB signal, said A/D converter having a predetermined sampling rate that is less than a nyquist frequency for said narrowband interference; and a bit detector configured to detect bits encoded in the desired UWB signal; a subtraction mechanism configured to subtract a portion of the UWB signal having a detected bit contained therein from said narrowband interference signal; an interference estimator configured to estimate the narrowband interference signal after said subtraction mechanism removed the portion of the UWB signal containing the bit; and a filter configured to extract said narrowband interference signal from the incoming signal based on the estimate of the narrowband interference signal made by the interference estimator.

Claim 15

A UWB receiver comprising: an A/D converter configured to digitize an incoming signal, said incoming signal including a narrowband interference signal and a UWB signal, said A/D converter having a predetermined sampling rate that is less than a nyquist frequency for said narrowband interference; and a bit detector configured to detect bits encoded in the desired UWB signal; a subtraction mechanism configured to subtract a portion of the UWB signal having a detected bit contained therein from said narrowband interference signal; an interference estimator configured to estimate the narrowband interference signal after said subtraction mechanism removed the portion of the UWB signal containing the bit; and a filter configured to extract said narrowband interference signal from the incoming signal based on the estimate of the narrowband interference signal made by the interference estimator.

Claim 16

A receiver as claim in claim 11 , wherein a sample rate of said A/D converter is adjustable to affect a completeness of extraction of said narrowband interference signal.

Claim 17

A receiver as claimed in claim 11 , wherein the A/D converter is configured to under sample said narrow band signal and cause said narrow band interference signal to reside in a same frequency band in which baseband processing occurs.

Claim 18

A receiver as claimed in claim 11 , wherein a quantization level of said incoming signal is adjusted to affect a completeness of extraction of said narrow band interference signal.

Claim 19

A receiver as claimed in claim 11 , wherein a vector length of said incoming signal is adjusted to affect a completeness of extraction of said narrow band interference signal.

Claim 20

An RFI extraction mechanism for passing a desired UWB signal while suppressing a narrowband interference signal that overlaps in frequency said UWB signal, comprising: a bit detector configured to detect bits of the desired UWB signal part of an incoming signal, and extract said desired UWB signal from said incoming signal; a filter configured to identify a frequency of said narrowband interference signal in order to extract said narrowband interference signal from said incoming signal; and an estimator configured to estimate an amount said narrowband interference signal that is residual from at least one of said bit detector and said filter.

Claim 21

An RFI extraction mechanism for passing a desired UWB signal while suppressing a narrowband interference signal that overlaps in frequency said UWB signal, comprising: a bit detector configured to detect bits of the desired UWB signal part of an incoming signal, and extract said desired UWB signal from said incoming signal; a filter configured to identify a frequency of said narrowband interference signal in order to extract said narrowband interference signal from said incoming signal; and an estimator configured to estimate an amount said narrowband interference signal that is residual from at least one of said bit detector and said filter.

Claim 22

An RFI extraction mechanism as claimed in claim 16 , further comprising: a combiner configured to subtract said desired UWB signal from said incoming signal resulting in said residual narrowband interference signal.

Claim 23

An RFI extraction mechanism as claimed in claim 16 , wherein the estimator is configured to detect a frequency of said narrowband interference signal that is provided to said filter so as to improve performance by further suppressing said narrowband interference signal in subsequent incoming signals.

Claim 24

A UWB receiver comprising: an A/D converter configured to undersample a RFI signal residing on an incoming UWB signal; an RFI extraction mechanism including a bit detector configured to detect bits of an incoming UWB signal, wherein said bits are from a desired data signal encoded in said UWB signal, and extract said desired signal from said incoming signal, a filter configured to match a narrowband interference signal to a reference signal in order to extract said narrowband interference signal, and an estimator configured to estimate said narrowband interference signal that remains after being processed by said filter; and a data detector configured to detect data in said UWB signal after said RFI mechanism extracts said RFI signal from said UWB signal.

Claim 25

A UWB receiver comprising: an A/D converter configured to undersample a RFI signal residing on an incoming UWB signal; an RFI extraction mechanism including a bit detector configured to detect bits of an incoming UWB signal, wherein said bits are from a desired data signal encoded in said UWB signal, and extract said desired signal from said incoming signal, a filter configured to match a narrowband interference signal to a reference signal in order to extract said narrowband interference signal, and an estimator configured to estimate said narrowband interference signal that remains after being processed by said filter; and a data detector configured to detect data in said UWB signal after said RFI mechanism extracts said RFI signal from said UWB signal.

Claim 26

A receiver as claimed in claim 19 , wherein the A/D converter is configured to under sample said RFI signal and cause alias terms of said RFI signal to reside in a same frequency band in which baseband processing occurs.

Claim 27

A receiver as claimed in claim 19 , wherein a sample rate of said A/D converter is adjustable so as to affect a completeness of extraction of said RFI signal.

Claim 28

A receiver as claimed in claim 19 , wherein a quantization level of said incoming signal is adjustable so as to affect a completeness of extraction of said RFI signal.

Claim 29

A receiver as claimed in claim 19 , wherein a vector length of said incoming signal is adjusted so as to affect a completeness of extraction of said RFI signal.

Claim 30

A receiver as claimed in claim 19 , wherein said RFI extraction mechanism being configured to interactively update and remove said narrowband interference signal.

Claim 31

A baseband RFI extraction mechanism for passing a desired UWB signal while suppressing a narrowband interference signal that overlaps in frequency said desired UWB signal, comprising: a narrowband interference suppression filter; a controller configured to controllably set filter parameters of the narrowband interference suppression filter to remove the narrowband interference signal after said narrowband interference signal has been undersampled; and a sensor configured to detect a signal energy level of said narrowband interference signal and provide feature data to said controller regarding features of said narrowband interference signal.

Claim 32

A baseband RFI extraction mechanism for passing a desired UWB signal while suppressing a narrowband interference signal that overlaps in frequency said desired UWB signal, comprising: a narrowband interference suppression filter; a controller configured to controllably set filter parameters of the narrowband interference suppression filter to remove the narrowband interference signal after said narrowband interference signal has been undersampled; and a sensor configured to detect a signal energy level of said narrowband interference signal and provide feature data to said controller regarding features of said narrowband interference signal.

Claim 33

An RFI extraction mechanism as claimed in claim 25 , wherein the controller further comprises: a processor configured to calculate said filter parameters of said filter.

Claim 34

A UWB receiver comprising: an A/D converter configured to sample an incoming UWB signal and undersample a narrowband interference signal; and an RFI extraction mechanism including a narrowband interference suppression filter; a controller configured to controllably set filter parameters of the narrowband interference suppression filter to remove the narrowband interference signal after said narrowband interference signal has been undersampled; and a sensor configured to detect a signal energy level of said narrowband interference signal and provide feature data to said controller regarding features of said narrowband interference signal; and a data detector configured to detect data in said UWB signal after said RFI extraction mechanism extracted the narrowband interference signal.

Claim 35

A UWB receiver comprising: an A/D converter configured to sample an incoming UWB signal and undersample a narrowband interference signal; and an RFI extraction mechanism including a narrowband interference suppression filter; a controller configured to controllably set filter parameters of the narrowband interference suppression filter to remove the narrowband interference signal after said narrowband interference signal has been undersampled; and a sensor configured to detect a signal energy level of said narrowband interference signal and provide feature data to said controller regarding features of said narrowband interference signal; and a data detector configured to detect data in said UWB signal after said RFI extraction mechanism extracted the narrowband interference signal.

Claim 36

A receiver as claimed in claim 27 , wherein the A/D converter which under sampled said narrow band signal causes said narrow band signal to reside in a same frequency band in which base band processing occurs.

Claim 37

A receiver as claimed in claim 27 , wherein a sample rate of said A/D converter is adjusted so as to affect an increased suppression of said narrow band signal.

Claim 38

A receiver as claimed in claim 27 , wherein a quantization level of said incoming is adjusted to affect and increased suppression of said narrow band signal.

Claim 39

A receiver as claimed in claim 27 , wherein a vector length of said incoming signal is adjustable to so as to affect increased suppression of said narrow band signal.

Claim 40

A receiver as claimed in claim 27 , wherein said RFI extraction mechanism is interactively updated with different filter parameters so as to adjust for changes in said narrowband interference signal.

Claim 43

A method as claimed in claim 33 , further comprising steps of: subtracting said narrowband interference signal from said incoming signal so as to obtain a processed UWB signal; and outputting said processed UWB signal.

Claim 44

A method as claimed in claim 33 , wherein the estimating said narrow band interference signal step further comprises: detecting signal energy of said narrow band interference signal; and calculating new filter parameters for a changing filter characteristic of said filter.