Nullsteering with an analog array

We propose two methods of nullsteering for a compact analog uniform circular array system. One method is based on switched beam. The predefined null patterns were generated by nullsteering algorithms and saved in the array system. The second method is based on adaptive array. A single channel receiver and A/D converter were added to the analog array output for adaptive array processing. Therefore, our analog array system is able to maintain communications and network functionality while adaptively steering nulls for optimal performance. This approach improves network performance by greatly reducing the need to poll network nodes for position information. Furthermore, the adaptive antenna technology provides the performance advantages of a nullsteering array in a small footprint antenna, allowing an increase in performance without a significant increase in size or cost.