because angle of arrival( AOA) estimation algorithm using array antenna has disadvantage of high cost and high complexity
an AOA estimation algorithm based on received signal strength indication( RSSI) is proposed. Using two directional antennas of rotating
directional pattern partial overlap to receive RSSI values and then AOA of target node can be estimated by using double directional pattern difference method. The experimental results demonstrate that the mean errors of AOA estimation for the indoor and outdoor are 6. 7° and 0. 6°
respectively. The proposed algorithm is of less complexity
low cost hardware and is suitable for node localization in WSNs.