METHOD AND APPARATUS FOR WIRELESS SYSTEMS

1 . A receive antenna array, comprising:

an array of radiating elements; and

an antenna controller coupled to the array of radiating elements and configured to:

determine one or more portions of a radiation pattern of the array of radiating elements in response to detection of an object; and

determine a directivity of a transmission from the array of radiating elements to increase gain of the transmission in a direction of the object based on the one or more portions of the radiation pattern,

wherein the one or more portions includes a first portion of the radiation pattern that corresponds to a main lobe, a second portion of the radiation pattern that corresponds to at least one side lobe portion and a third portion of the radiation pattern that corresponds to an overlapping area of the main lobe and the at least one side lobe.

2 . The receive antenna array of claim 1 , wherein the first portion of the radiation pattern has a first radial distance from the array of radiating elements.

3 . The receive antenna array of claim 2 , wherein the second portion of the radiation pattern has a second radial distance from the array of radiating elements.

4 . The receive antenna array of claim 3 , wherein the third portion of the radiation pattern has a third radial distance from the array of radiating elements.

5 . The receive antenna array of claim 4 , wherein second radial distance is greater than the third radial distance.

6 . The receive antenna array of claim 5 , wherein first radial distance is greater than the second radial distance.)

7 . A method of directing radar transmissions, comprising:

receiving a return signal at an array of antenna elements;

determining an angle of arrival and a range of the return signal reflected by an object; and

controlling a directivity of the array of antenna elements as a function of the angle of arrival and the range based at least on a radial range of the object.

8 . The method of claim 7 , wherein the controlling the directivity of the array of antenna elements comprises:

determining a radial range of the object measured from the array of antenna elements; and

adjusting the directivity of the array of antenna elements for the radial range.

9 . The method of claim 8 , further comprising:

determining that a portion of a radiation pattern of the array of antenna elements detected an object reflection; and

determining a scan step size as a function of the portion of the radiation pattern.

10 . The method of claim 9 , further comprising:

determining directivity of a subsequent scan step size based at least on the radial range, wherein the radiation pattern includes a main lobe portion that corresponds to a first radial range of the object, a side lobe portion that corresponds to a second radial range of the object, and an overlapping portion of the main lobe portion and the side lobe portion that corresponds to a third radial range of the object.

11 . A method of detecting objects with radiation pattern directivity, comprising:

directing a main beam of a receive antenna to detect one or more return radio frequency (RF) beams that are reflected from one or more objects in an environment;

receiving the one or more return RF beams as reflections through the receive antenna;

determining which of a plurality of lobes of the receive antenna received the reflections;

adjusting a direction of at least one lobe of the plurality of lobes based on one or more properties of the reflections;

determining whether a full scan has completed; and

setting the receive antenna to an initial direction when the full scan is completed.

12 . The method of claim 11 , further comprising:

determining one or more of a direction or gain of one or more side lobes of the plurality of lobes.

13 . The method of claim 11 , further comprising:

determining whether a main lobe of the plurality of lobes received the reflections; and

adjusting a direction of a main beam emitted by the receive antenna when the reflections are determined as received by the main lobe.

14 . The method of claim 13 , wherein the adjusting of the direction of the main beam is performed through phase shifting operations on one or more antenna elements of the receive antenna.

15 . The method of claim 13 , further comprising:

determining one or more of a range, velocity or angle of arrival of the one or more return RF beams,

wherein the adjusting of the direction of the main beam is performed based at least on the determined range, velocity or angle of arrival of the reflections.

16 . The method of claim 15 , further comprising:

determining whether to direct a main lobe of the receive antenna or an overlapped region of the receive antenna based on a comparison of the determined range to a predetermined range threshold;

directing the overlapped region of the receive antenna toward a direction of the object when the determined range is lesser than the predetermined range threshold; and

directing the main lobe of the receive antenna toward the direction of the object when the determined range is greater than the predetermined range threshold.

17 . The method of claim 11 , further comprising:

determining whether side lobes of the plurality of lobes received the reflections; and

adjusting a direction of a main beam and resultant side lobe directions emitted by the receive antenna when the reflections are determined as received by the side lobes.

18 . The method of claim 17 , wherein the adjusting the direction of a main beam and the resultant side lobe directions comprises adjusting alignment of at least one side lobe with a direction of the object.

19 . The method of claim 11 , further comprising:

determining whether an overlapped area of a main lobe and at least one side lobe of the plurality of lobes received the reflections; and

adjusting a direction of a main beam and resultant side lobe directions emitted by the receive antenna when the reflections are determined as received by the overlapped area of the main lobe and the at least one side lobe.

20 . The method of claim 19 , wherein the adjusting the direction of the main beam and the resultant side lobe directions comprises adjusting alignment of the overlapped area of the main lobe and the at least one side lobe with a direction of the object.)