Signal detector

Abstract

A method, apparatus, and system for detecting a tone.

1 - 24 . (canceled)  
   
   
       25 . A method, comprising: 
 sampling a received signal over a period to obtain a first sample block having a first quantity of samples and a second sample block having a second quantity of samples, the first quantity being different than the second quantity; and    processing the first and second sample blocks to detect a plurality of tones in the received signal, wherein each of the plurality of tones have a different frequency.    
   
   
       26 . The method of  claim 25 , wherein said processing is associated with a small-sized discrete Fourier transform.  
   
   
       27 . The method of  claim 26 , wherein said processing is associated with a single-point discrete Fourier transform.  
   
   
       28 . The method of  claim 25 , wherein said processing is associated with a fast Fourier transform.  
   
   
       29 . The method of  claim 25 , wherein said processing is associated with at least one tone detector threshold.  
   
   
       30 . The method of  claim 25 , wherein the period is associated with a symbol period.  
   
   
       31 . The method of  claim 25 , wherein the number of samples in the period is pre-determined based on a communication protocol  
   
   
       32 . The method of  claim 25 , wherein the signal is received from one of an analog communication medium and a digital communication medium.  
   
   
       33 . The method of  claim 32 , wherein the signal is received from a digital subscriber line.  
   
   
       34 . An apparatus, comprising: 
 a receiving unit to receive a signal;    a sampling unit to sample the received signal over a period to obtain a first sample block having a first quantity of samples and a second sample block having a second quantity of samples, the first quantity being different than the second quantity; and    a digital signal processor to transform the first and second sample blocks to detect a plurality of tones in the received signal, wherein each of the plurality of tones have a different frequency.    
   
   
       35 . The apparatus of  claim 34 , wherein the receiving unit includes an analog front end circuit.  
   
   
       36 . The apparatus of  claim 34 , wherein transform is associated with at least one of: (i) a small-sized discrete Fourier transform, (ii) a single-point discrete Fourier transform, or (iii) a fast Fourier transform.  
   
   
       37 . An article of manufacture comprising: 
 a computer readable medium having stored thereon instructions which, when executed by a processor, cause the processor to: 
 sample a received analog signal over a period to obtain a first sample block having a first quantity of samples and a second sample block having a second quantity of samples, the first quantity being different than the second quantity;  
 transform the first and second sample blocks using at least one of: (i) a small-sized discrete Fourier transform, (ii) a single-point discrete Fourier transform, or (iii) a fast Fourier transform; and  
 detect plurality of tones based on transformed information, wherein each of the plurality of tones have a different frequency.  
   
   
   
       38 . The article of  claim 37 , wherein the period is associated with a symbol period.  
   
   
       39 . The article of  claim 38 , wherein the first quantity of samples is 276 samples and the second quantity of samples is 256 samples.  
   
   
       40 . The article of  claim 37 , wherein the first and second quantities are large enough that substantially all received symbols are accurately translated into digital information.  
   
   
       41 . The article of  claim 37 , wherein at least one of the tones is associated with an A4, A43, B43, or C43 carrier.  
   
   
       42 . A system, comprising: 
 a receiving unit to receive a digital subscriber line signal;    a sampling unit to sample the received signal over a period to obtain a first sample block having a first quantity of samples and a second sample block having a second quantity of samples, the first quantity being different than the second quantity;    a detector to transform the first and second sample blocks to detect a plurality of tones in the received signal, wherein each of the plurality of tones have a different frequency; and    a communication adaptor.    
   
   
       43 . The system of  claim 42 , wherein the digital subscriber line signal is received from a remote device and the communication adaptor is to provide information associated with the received signal to a local processing system.  
   
   
       44 . The system of  claim 42 , wherein the first and second quantities are large enough that substantially all received symbols are accurately translated into digital information.  
   
   
       45 . The system of  claim 42 , wherein at lease one of the tones are associated with an A4, A43, B43, or C43 carrier.