RECEIVING DEVICE, RECEIVING METHOD, PROGRAM, AND RECORDING MEDIUM

• Main Authors: SHINPO DAISUKE, ITO NAOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 16.11.2017
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION; TRANSMISSION

PROBLEM TO BE SOLVED: To allow an arrival direction of a direct wave to be estimated correctly even if there is a delay wave with a short delay time when the direction of the direct wave is estimated by receiving a radio wave from a transmitter with an array antenna.SOLUTION: A receiving device estimates (13) delay times (τ-τ) of arrival waves from a transmission path estimation result by a super resolution process, calculates (14) combination frequency characteristics (X(t, θ)-X(t, θ)) by giving an amount of correction to cancel out phase difference to M arrival angle candidates (θ-θ), estimates (15) reception power of a direct wave from the combination frequency characteristics (X(t, θ)-X(t, θ)) and the delay times (τ-τ), and estimates that an arrival angle candidate having the largest estimated reception power of the direct wave is an arrival angle (θ) of the direct wave.SELECTED DRAWING: Figure 1 【課題】送信機からの電波をアレイアンテナで受信して直接波の方向を推定する際、遅延時間が短い遅延波が存在する場合、直接波の到来方向を正しく推定できない。【解決手段】伝送路推定結果から超分解能処理により到来波の遅延時間（τ１〜τＬ）を推定し（１３）、Ｍ個の到来角候補（θ１〜θＭ）について位相差を打ち消す補正量を与えて合成周波数特性（Ｘ（ｔ,θ１）〜Ｘ（ｔ,θＭ））を算出し（１４）、合成周波数特性(Ｘ（ｔ,θ１）〜Ｘ（ｔ,θＭ））と、遅延時間（τ１〜τＬ）とから、直接波の受信電力を推定し（１５）、推定された直接波の受信電力が最大となる到来角候補を直接波の到来角（θａ）と推定する。【選択図】図１