Cross-correlation detection and elimination in a receiver

1. A device, comprising:

a receiver capable of receipt of a signal that contains more than one pseudo noise (PN) coded signal component;

a memory coupled to the receiver that stores a plurality of off-peak energy values associated with a PN; and

a controller coupled to the memory that identifies a sub-set of off-peak energy values are off-peak energy values in order to identify auto-correlation and cross-correlation using the off-peak energy values, and if inconclusive the controller calculates an average of off-peak energy values to identify auto-correlation and cross correlation, where a maximum off-peak energy value from the plurality of off-peak energy values is identified and compared to a predetermined threshold in order to identify auto-correlation.

2. The device of claim 1 , where the maximum off-peak energy value is less than the predetermined threshold signifies that auto-correlation exists.

3. The device of claim 1 , where a fourth largest off-peak energy value from the plurality of off-peak energy values is identified and compared to another threshold in order to identify cross-correlation.

4. The device of claim 3 , where the fourth largest off-peak energy value is greater than the other threshold identifies cross-correlation.

5. The device of claim 1 , further comprising:

an average off-peak energy value that is calculated. by the controller and compared to yet another threshold.

6. The device of claim 5 , where the average off-peak energy being less then the yet another threshold signifies auto-correlation.

7. A method for determining auto-correlation or cross correlation of a signal, comprising:

receiving a signal from a receiver that contains more than one pseudo noise (PN) coded signal component;

storing in a memory coupled to the receiver a plurality of off-peak energy values associated with a PN; and

retrieving a sub-set of off-peak energy values with a controller that is coupled to the memory that are off-peak energy values in order to identify auto-correlation and cross-correlation using the oft-peak energy values, with

identifying where a maximum off-peak energy value from the plurality of off-peak energy values; and

comparing the maximum off-peak energy value to a predetermined threshold in order to identify auto-correlation;

and if inconclusive the controller calculates an average of off-peak energy values to identity auto-correlation and cross-correlation.

8. The method of claim 7 , where the maximum off-peak energy value is less than the predetermined threshold signifies that auto-correlation exists.

9. The method of claim 7 , further including:

identifying a fourth largest off-peak energy value from the plurality of off-peak energy values; and

comparing the fourth largest off-peak energy value to another threshold in order to identify cross-correlation.

10. The method of claim 9 , where the fourth largest off-peak energy value is greater than the other threshold identifies cross-correlation.

11. The method of claim 7 , further comprising:

calculating with the controller an average off-peak energy value; and

comparing the average off-peak energy value to yet another threshold.

12. The method of claim 11 , where the average off-peak energy being less then the yet another threshold signifies auto-correlation.

13. A device for determining auto-correlation or cross correlation of a signal, comprising:

means for receiving the signal that contains more than one pseudo noise (PN) coded signal component;

means for storing a plurality of off-peak energy values associated with a PN; and

means for retrieving a sub-set of off-peak energy values that are off-peak energy values in order to identify auto-correlation and cross-correlation using the off-peak energy values with

means for identifying where a maximum off-peak energy value from the plurality of off-peak energy values; and

means for comparing the maximum off-peak energy value to a predetermined threshold in order to identify auto-correlation;

and if inconclusive the controller calculates an average of off-peak energy values to identify auto-correlation and cross-correlation.

14. The device of claim 13 , where the maximum off-peak energy value is less than the predetermined threshold signifies that auto-correlation exists.

15. The method of claim 13 , further including:

means for identifying a fourth largest off-peak energy value from the plurality of off-peak energy values; and

means for comparing the fourth largest off-peat energy value to another threshold in order to identify cross-correlation.

16. The device of claim 15 , where the fourth largest off-peak energy value is greater than the other threshold identifies cross-correlation.

17. The device of claim 13 , further comprising:

means for calculating an average off-peak energy value; and

means for comparing the average off-peak energy value to yet another threshold.

18. The device of claim 17 , where the average off-peak energy being less then the yet another threshold signifies auto-correlation.