Sub-system based window placement and size decision mechanism and method thereof

1. A method of path detection in a multi-path wireless communications system, comprising:

receiving a wireless signal;

configuring a plurality of sub-windows;

selecting an objective for configuring a search window based on the plurality of sub-windows, wherein each of the sub-windows is smaller in size than the search window;

providing a first counter for the objective;

providing a separate second counter for each sub-window of the plurality of sub-windows;

setting a threshold value as a reference for comparison; selecting a decision period for a duration of the objective;

identifying whether at least one path is detected in each of the plurality of sub-windows;

increasing the second counter for the each sub-window by one count if at least one path is detected in the each sub-window;

repeating the steps of identifying and increasing until an end of the decision period;

comparing counts of the second counters for the plurality of sub-windows with the threshold; and

identifying a placement and a size of the search window.

2. The method of claim 1 , wherein selecting an objective for configuring a search window includes selecting from one of tracking, shrinking and expanding a search window.

3. The method of claim 1 , wherein the first counter includes one of a period counter and a tracking counter.

4. The method of claim 1 , further comprising:

resetting the first and second counters; and

obtaining information regarding an initial placement and size of the search window.

5. The method of claim 4 , further comprising:

reading back a sub-window information;

increasing the first and second counters; and

adjusting the sub-window based on the sub-window information.

6. The method of claim 5 , whereas at an end of the decision period, a value of the second counter is compared with at least one predetermined thresholds.

7. The method claim 5 , wherein at least one of a placement or size of the search window is adjusted by one of expanding a relatively low efficient sub-window to maintain a path detect-rate; and shrinking a relatively high

efficient sub-window to reduce power consumption.

8. The method of claim 5 , further comprising determining whether a range of the search window includes one of a continuous region and multiple separate regions.

9. A method of path detection in a multi-path wireless communications system, comprising:

receiving a wireless signal;

configuring a search window having a placement and size;

configuring a plurality of sub-windows, wherein each of the sub-windows is smaller in size than the search window;

providing a first counter for counting a decision period and a separate second counter for each sub-window of the plurality of sub-windows;

resetting the first counter and the second counter;

identifying whether at least one path is detected in each of the plurality of sub-windows;

reading back sub-window information regarding whether at least one path is detected in each of the plurality of sub-windows;

updating the first counter and increasing the second counters for the each sub-window by one count if at least one path is detected in the each sub-window;

repeating the steps of identifying and reading until the first counter counts to an end of the decision period; and

adjusting the sub-window based on counts of the second counters for the plurality of sub-windows.

10. The method of claim 9 , wherein the first counter includes one of a period counter and a tracking counter.

11. The method of claim 9 , further comprising obtaining information regarding an initial placement and size of the search window.

12. The method of claim 9 , wherein values of the second counters are compared with at least one predetermined threshold.

13. The method claim 9 , wherein at least one of a placement or size of the search window is adjusted by one of expanding a relatively low efficient sub-window to maintain a path detect-rate and shrinking a relatively high efficient sub-window to reduce power consumption.

14. A method of path detection in a multi-path wireless communications system, comprising:

receiving a wireless signal;

providing a separate sub-window counter for each sub-window of a plurality of sub-windows;

setting a high threshold and setting a low threshold;

resetting each sub-window counter;

configuring a search window based on the plurality of the sub-windows;

increasing at least one sub-window counter by one count if at least one path is detected in a respective sub-window for the at least one sub-window counter after conducting a multi-path search;

obtaining a count value of each sub-window counter after a decision period; and

adjusting the search window based on the high threshold, the low threshold and the count values of the sub-window counters.

15. The method of claim 14 , further comprising

comparing the count values of the sub-window counters with the high threshold; and

expanding the search window when the count values are smaller than the high threshold.

16. The method of claim 14 , further comprising:

providing a period counter to count the decision period;

resetting the period counter; and

obtaining an initial placement and size of the search window.

17. The claim of claim 14 , further comprising:

comparing the count values of the sub-window counters with the high threshold; and

shrinking the search window when the count values are greater than or equal to the high threshold.

18. The method of claim 17 , wherein a boundary of the search window to be shrunk is based on the low threshold and the boundary value is greater than or equal to the low threshold.