Patent ID: 6070079
Filing Date: 2000-05-30
Classification: G01S,H04W

Abstract:
A positioning apparatus provided in a cellular base station for determining a position of a portable terminal in a cell covered by said cellular base station, said positioning apparatus having a base position indicative of a position of said cellular base station on a map, the positioning apparatus comprising:an array antenna for receiving a transmission signal transmitted by said portable terminal to output a plurality of reception signals;receiver means for translating said reception signals into a plurality of baseband signals to demodulate said baseband signals into a plurality of demodulated signals;estimation means for estimating incident direction and delay time of said transmission signal on the basis of said demodulated signals to output an estimation result indicative of said incident direction and said delay time; andposition calculating means for calculating a terminal position of said portable terminal on said map in accordance with said estimation result and said base position to output a terminal position signal indicative of said terminal position.