ABSTRACT
In signal reception system design, several possible diversity techniques, such as time, frequency, and space diversities, can be used to obtain satisfactory signal reception performance even under harsh operation environments. For the space diversity technique, diversity is achieved basically using multiple sensors, arranged in a certain pattern, which is known as an array. In spatial filtering, the objective of using an array is to extract the desired signal copy while filtering out the unwanted interference, and environmental and system noise. An array may be regarded as a spatial filter: to allow signal from a certain direction to pass through while rejecting or stopping all other signal sources impinging on the array. In the case of array weight synthesis, if one is to consider the array weights as part of the array element characteristics, by adjusting the array weight vector, one is actually adjusting the performance of the array manifold.
