Space diver city device

专利名称：Space diver city device发明人：山本 和弘

申请号：JP特願平1-135910申请日：19890531

公开号：JP特公平7-50865B2公开日：19950531

摘要：PURPOSE:To surely perform space diversity at every carrier by controlling alevel detection signal after synthesizing with a control circuit in common to each carrier.CONSTITUTION:The device is equipped with branch circuits 6 and 7 which branch areception signal to a signal at every carrier, and inphase synthesis circuits 81-8n whichfetch carrier signals from the branch circuits 6 and 7, and synthesize the carrier signal onone side with the carrier signal on the other side via an infinite phase apparatus 81, andafter that, eliminate the carrier with a band-pass filter 83, and perform the gain control ofan elimination signal with an automatic gain control means 84. Also, it is equipped with acommon control circuit 9 which controls the phase of the infinite phase apparatus 81 ofeach carrier so as to maximize an automatic gain control voltage at every carrier. Here,the control circuit 9 is comprised so that each output signal from each level detector 85that is the automatic gain control voltage at every carrier can display the maximum valueand the phase of the infinite phase apparatus 81 of each carrier can be controlled, In sucha way, the space diversity can be surely performed with simple constitution comparedwith a multiple carrier system.

申请人：日本電気株式会社

地址：東京都港区芝5丁目7番1号

国籍：JP

代理人：渡辺 喜平

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