Method and system for automatically rescaling an accumulation buffer in synchronization systems

1. A method for communication in a mobile device including an accumulation buffer, the method comprising:

correlating, by the mobile device, a plurality of reference sequences with a plurality of primary synchronization signal (PSS) transmissions to provide a plurality of PSS timing hypotheses;

accumulating, in the accumulation buffer, values representative of energy associated with the plurality of PSS timing hypotheses to provide accumulated energy values;

rescaling the accumulated energy values by a rescaling factor when a particular PSS timing hypothesis from among the plurality of PSS timing hypotheses is at risk of saturating the accumulation buffer; and

detecting a correct PSS timing hypothesis from among the plurality of PSS timing hypotheses based on the rescaled accumulated energy values.

2. The method according to claim 1 , further comprising:

monitoring a significant bit of each of the accumulated energy values.

3. The method according to claim 2 , wherein the significant bit is a most significant bit or one of lesser significant bits.

4. The method according to claim 2 , further comprising:

detecting the saturation of the accumulation buffer based on said monitoring.

5. The method according to claim 4 , further comprising:

determining the rescaling factor in response to the detected saturation of the accumulation buffer.

6. The method according to claim 5 , wherein the rescaling comprises:

right shifting the accumulated energy values by the rescaling factor to provide right shifted accumulated energy values as the rescaled accumulated energy values.

7. The method according to claim 1 , wherein the accumulating comprises:

accumulating the values utilizing an integrating method to provide the accumulated energy values.

8. The method according to claim 1 , wherein the accumulating comprises:

accumulating the values utilizing a filtering method to provide the accumulated energy values.

9. The method according to claim 1 , wherein the resealing comprises:

resealing the accumulated energy values prior to the saturating of the accumulation buffer.

10. The method according to claim 1 , wherein a bit length of the resealing factor is less than a bit length of the accumulation buffer.

11. The method according to claim 1 , wherein the accumulating comprises:

accumulating the values for an arbitrary length of time.

12. The method according to claim 1 , further comprising;

monitoring significant bits of the accumulated energy values to determine when the particular PSS timing hypothesis is at risk of saturation; and

adjusting the resealing factor based on the monitoring.

13. A baseband processor for a mobile device, the baseband processor comprising:

an accumulation buffer configured to accumulate values representative of energy associated with a plurality of primary synchronization signal (PSS) timing hypotheses to provide accumulated energy values,

wherein the baseband processor is configured:

to correlate a plurality of reference sequences with a plurality of PSS transmissions to provide the plurality of PSS timing hypotheses;

to rescale the accumulated energy values by a resealing factor when a particular PSS timing hypothesis from among the plurality of PSS timing hypotheses is at risk of saturating the accumulation buffer; and

to detect a correct PSS timing hypothesis from among the plurality of PSS timing hypotheses based on the rescaled accumulated energy values.

14. The baseband processor according to claim 13 , wherein the baseband processor is further configured to monitor a significant bit of each of the values.

15. The baseband processor according to claim 14 , wherein the significant bit is a. most significant bit or one of lesser significant bits.

16. The baseband processor according to claim 14 , wherein the baseband processor is further configured to detect the saturating of the accumulation buffer based on the monitoring.

17. The baseband processor according to claim 16 , wherein the baseband processor is further configured to determine the resealing factor in response to the detected saturation of the accumulation buffer.

18. The baseband processor according to claim 17 , wherein the baseband processor is further configured to right shift each of the accumulated energy values by the resealing factor to provide right shifted accumulated energy values as the resealed accumulated energy values.

19. The noseband processor according to claim 13 , wherein the baseband processor is further configured to utilize an integrating method to accumulate the values to provide the accumulated energy values.

20. The baseband processor according to claim 13 , wherein the baseband processor is further configured to utilize a filtering method to accumulate the values to provide the accumulated energy values.

21. The baseband processor according to claim 13 , wherein the baseband processor is further configured to rescale the accumulated energy values prior to the saturating of the accumulation buffer.

22. The baseband processor according to claim 13 , wherein a bit length of the resealing factor is less than a hit length of the accumulation buffer.

23. The baseband processor according to claim 13 , wherein the baseband processor is configured to accumulate the values for an arbitrary length of time.

24. The baseband processor according to claim 13 , wherein the baseband processor is configured to:

monitor significant bits of the accumulated energy values to determine when the particular PSS timing hypothesis is at risk of saturation; and

adjust the resealing factor based on the monitoring.