Patent ID: 7103120

Claim:
An adaptive antenna reception apparatus wherein an incoming signal is received by a plurality of antennae and the signals received by said antennae are weighted synthesized with antenna weights to detect a desired signal, comprising: one or more adaptive antenna reception sections for adaptively controlling the antenna weights and for multiplying the signals received by said antennae by the antenna weights and synthesizing resulting signals of the multiplication to detect the desired signal; and an initial antenna weight production section for producing one or more initial antenna weight candidates which are candidates for an initial value to be used for the adaptive control of the antenna weights to detect a new desired signal based on antenna weights of desired signals being received which are adaptively controlled by said adaptive antenna reception section, wherein said initial antenna weight production section includes one or more beam-null direction search sections provided corresponding to said adaptive antenna reception sections for calculating beam directions and null directions of beam patterns formed with the antenna weights adaptively controlled by said adaptive antenna reception sections, a null formation direction discrimination section for discriminating a desired null direction of a beam pattern by the antenna weight for detecting the new desired signal from the beam directions and the null directions calculated by said beam-null direction search section, and an initial antenna weight candidate production section for producing the one or more initial antenna weight candidates with which beam patterns which have the null in the desired null direction obtained by said null formation direction discrimination section and have different beam directions from each other are formed, and each of said adaptive antenna reception sections starts, when the adaptive antenna reception section is allocated to the new desired signal, the adaptive control of the antenna weight using the initial antenna weight candidate whose beam direction is the incoming direction of the desired signal as an initial value.