{"id":10605,"date":"2024-03-25T11:32:31","date_gmt":"2024-03-25T02:32:31","guid":{"rendered":"https:\/\/www11.ieice.org\/cs\/ap\/wp\/?page_id=10605"},"modified":"2026-06-25T15:56:48","modified_gmt":"2026-06-25T06:56:48","slug":"los_probability_ogawa","status":"publish","type":"page","link":"https:\/\/www.ieice.org\/cs\/ap\/misc\/denpan-db\/prop_model_db\/model_list\/los_probability_ogawa\/","title":{"rendered":"\u90fd\u5e02\u5185\u30a2\u30af\u30bb\u30b9\u7121\u7dda\u901a\u4fe1\u306e\u305f\u3081\u306e\u898b\u901a\u3057\u7387\u30e2\u30c7\u30eb\uff08\u5c0f\u5ddd\u307b\u304b\u30011986\uff09\uff08Site-specific\uff09"},"content":{"rendered":"
<\/div>

<\/path><\/svg><\/i> \"Loading\"<\/p>

<\/div>(since 2025\/12\/5)<\/p>\n\n\n\n

\u898b\u901a\u3057\u7387\u306e\u8aac\u660e<\/strong><\/h3>\n\n\n\n

\u3000\u9ad8\u5468\u6ce2\u6570\u5e2f\u306b\u304a\u3051\u308b\u7121\u7dda\u30be\u30fc\u30f3\u8a2d\u8a08\u3067\u306f\uff0c\u9001\u53d7\u4fe1\u70b9\u9593\u306e\u898b\u901a\u3057\u6709\u7121\u306e\u8a55\u4fa1\uff08\u898b\u901a\u3057\u30a8\u30ea\u30a2\u306e\u63a8\u5b9a\uff09\u304c\u91cd\u8981\u306a\u691c\u8a0e\u9805\u76ee\u3068\u306a\u308b\uff0e\u898b\u901a\u3057\u6709\u7121\u306e\u8a55\u4fa1\u306f\uff0c\u3042\u308b\u74b0\u5883\u306b\u304a\u3044\u3066\u9001\u53d7\u4fe1\u70b9\u3092\u8a2d\u5b9a\u3057\u305f\u5834\u5408\u306b\uff0c\u305d\u306e\u9001\u53d7\u4fe1\u70b9\u9593\u306b\u898b\u901a\u3057\u304c\u53d6\u308c\u308b\u78ba\u7387\u3092\u63a8\u5b9a\u3059\u308b\u3053\u3068\u304c\u4e00\u822c\u7684\u3067\u3042\u308b\uff0e\u3053\u3053\u3067\u306f\uff0c\u57fa\u5730\u5c40\uff08BS\uff09\uff0d\u7aef\u672b\u5c40\uff08UT\uff09\u9593\u306b\u898b\u901a\u3057\u304c\u3068\u308c\u308b\u78ba\u7387\u3092\u898b\u901a\u3057\u7387\u3068\u547c\u3076\uff0e<\/p>\n\n\n\n

\u3000\u898b\u901a\u3057\u7387\u306e\u5177\u4f53\u7684\u306a\u4f7f\u308f\u308c\u65b9\u306f\uff0c\u3042\u308b\u6761\u4ef6\u4e0b\u306b\u304a\u3044\u3066\u898b\u901a\u3057\u304c\u78ba\u4fdd\u3067\u304d\u308b\u5834\u6240\u7387\u306e\u63a8\u5b9a\u8a55\u4fa1\u3092\u884c\u3046\u3053\u3068\u306e\u307f\u306a\u3089\u305a\uff0c\u4ed6\u7121\u7dda\u5c40\u3068\u306e\u898b\u901a\u3057\u304c\u3068\u308c\u308b\u3053\u3068\u306b\u3088\u308b\u4e88\u88ab\u5e72\u6e09\u306e\u767a\u751f\u78ba\u7387\u306e\u8a55\u4fa1\u306b\u7528\u3044\u3089\u308c\u308b\u306a\u3069\u3057\u3066\u3044\u308b\uff0e\u307e\u305f\uff0c\u79fb\u52d5\u901a\u4fe1\u7b49\u306e\u30dd\u30a4\u30f3\u30c8\uff0d\u30a8\u30ea\u30a2\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u901a\u4fe1\u5bb9\u91cf\u306e\u8a55\u4fa1\u306b\u304a\u3044\u3066\u306f\uff0c\u898b\u901a\u3057\u7387\u3092\u7528\u3044\u3066\u500b\u3005\u306e\u7aef\u672b\u6bce\u306b\u898b\u901a\u3057\u306e\u6709\u7121\u3092\u8a2d\u5b9a\u3057\uff0c\u305d\u308c\u306b\u3088\u3063\u3066\u8a55\u4fa1\u306b\u7528\u3044\u308b\u4f1d\u642c\u640d\u5931\u63a8\u5b9a\u5f0f\u3092\u5909\u66f4\u3059\u308b\u7b49\uff0c\u898b\u901a\u3057\u306e\u6709\u7121\u306e\u5834\u5408\u5206\u3051\u306b\u7528\u3044\u3089\u308c\u308b\uff0e<\/p>\n\n\n\n

\u3000\u96fb\u6ce2\u4f1d\u642c\u306b\u304a\u3044\u3066\u201c\u898b\u901a\u3057\u201d\u3068\u8a00\u3063\u305f\u5834\u5408\uff0c\u5927\u304d\u304f\u4e8c\u3064\u306e\u5b9a\u7fa9\u304c\u5b58\u5728\u3059\u308b\uff0e\u4e00\u3064\u306f\u9001\u53d7\u4fe1\u70b9\u9593\u3092\u7d50\u3076\u898b\u901a\u3057\u7dda\u304c\u906e\u3089\u308c\u306a\u3044\u5834\u5408\uff0c\u3082\u3046\u4e00\u3064\u306f\u898b\u901a\u3057\u7dda\u306e\u5468\u56f2\u306b\u5730\u7269\u3084\u4ec0\u5668\u304c\u5b58\u5728\u305b\u305a\uff0c\u305d\u308c\u3089\u304b\u3089\u306e\u56de\u6298\u306e\u5f71\u97ff\u304c\u306a\u3044\u5834\u5408\u3067\u3042\u308b\uff0e\u5f8c\u8005\u306e\u5834\u5408\u306f\uff0c\u7b2c1\u30d5\u30ec\u30cd\u30eb\u30be\u30fc\u30f3\u304c\u969c\u5bb3\u7269\u306b\u304b\u304b\u3089\u306a\u3044\u3053\u3068\u304c\u76ee\u5b89\u306b\u306a\u308b\uff0e\u3053\u3053\u3067\u8ff0\u3079\u308b\u201c\u898b\u901a\u3057\u201d\u306f\uff0c\u524d\u8005\u306e\u5b9a\u7fa9\u306b\u6cbf\u3063\u305f\u3082\u306e\u3067\u3042\u308a\uff0c\u9001\u53d7\u4fe1\u70b9\u9593\u3092\u7d50\u3076\u898b\u901a\u3057\u7dda\u304c\u906e\u3089\u308c\u306a\u3044\u5834\u5408\u3092\u6307\u3059\uff0e<\/p>\n\n\n\n

\u3000\u898b\u901a\u3057\u7387\u306e\u63a8\u5b9a\u6cd5\u306b\u306f\u69d8\u3005\u306a\u3082\u306e\u304c\u3042\u308b\u304c\uff0cBS\uff0dUT\u9593\u8ddd\u96e2\u306e\u307f\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u305f\u898b\u901a\u3057\u7387\u306e\u63a8\u5b9a\u5f0f\u3068\uff0cBS\uff0dUT\u9593\u8ddd\u96e2\u306b\u52a0\u3048\u3066\uff0c\u57fa\u5730\u5c40\u9ad8\uff0c\u7aef\u672b\u5c40\u9ad8\uff0c\u8a55\u4fa1\u3059\u308b\u9818\u57df\u306e\u5efa\u7269\u9ad8\u3055\u5206\u5e03\uff0c\u5efa\u7269\u5bc6\u5ea6\u7b49\u3082\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u7528\u3044\u308b\u63a8\u5b9a\u6cd5\u3068\u306b\u5927\u5225\u3067\u304d\u308b\uff0e\u524d\u8005\u3092Site-general\u30e2\u30c7\u30eb\uff0c\u5f8c\u8005\u3092Site-specific\u30e2\u30c7\u30eb\u3068\u547c\u3076\u3053\u3068\u306b\u3059\u308b\uff0e\u4e3b\u306aSite-general\u30e2\u30c7\u30eb\u3068\u3057\u3066\u300cITU-R\u5831\u544aM.2412\u306e\u898b\u901a\u3057\u7387\u63a8\u5b9a\u5f0f<\/a>\u300d\uff0c \u4e3b\u306aSite-specific\u30e2\u30c7\u30eb\u3068\u3057\u3066\u300cITU-R\u52e7\u544aP.1410\u306e\u898b\u901a\u3057\u7387\u30e2\u30c7\u30eb<\/a>\u300d\uff0c\u300c\u90fd\u5e02\u5185\u30a2\u30af\u30bb\u30b9\u7121\u7dda\u901a\u4fe1\u306e\u305f\u3081\u306e\u898b\u901a\u3057\u7387\u30e2\u30c7\u30eb\u300d\u7b49\u304c\u4e0a\u3052\u3089\u308c\u308b\u304c\uff0c\u3053\u3053\u3067\u306f\u300c\u90fd\u5e02\u5185\u30a2\u30af\u30bb\u30b9\u7121\u7dda\u901a\u4fe1\u306e\u305f\u3081\u306e\u898b\u901a\u3057\u7387\u30e2\u30c7\u30eb\u300d\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3059\u308b\uff0e<\/p>\n\n\n\n

\u30e2\u30c7\u30eb\u306e\u8aac\u660e<\/strong>\u3000<\/h3>\n\n\n\n

\u3000\u5c0f\u5ddd\uff0c\u4f50\u85e4\u3089\u306b\u3088\u308a\uff0c\u90fd\u5e02\u5185\u30a2\u30af\u30bb\u30b9\u7121\u7dda\u901a\u4fe1\u306e\u305f\u3081\u306e\u898b\u901a\u3057\u7387\u306e\u63a8\u5b9a\u6cd5\u304c\u958b\u767a\u3055\u308c\u3066\u3044\u308b[1][2][3]\uff0e\u5143\u3005\u306fLMDS\u7b49\u306e\u898b\u901a\u3057\u3092\u78ba\u4fdd\u3057\u3066\u901a\u4fe1\u3092\u884c\u3046\u56fa\u5b9a\u30a2\u30af\u30bb\u30b9\u5411\u3051\u306b\u4f5c\u3089\u308c\u305f\u3082\u306e\u3067\u3042\u308b\uff0e
\u3000\u672c\u30e2\u30c7\u30eb\u306b\u304a\u3051\u308b\u8857\u4e26\u307f\u306e\u30e2\u30c7\u30eb\u3092\u56f31\uff0c\u7279\u5fb4\u3092\u88681\u306b\u793a\u3059\uff0e\u307e\u305f\uff0c\u3053\u306e\u30e2\u30c7\u30eb\u306b\u73fe\u308c\u308b\u5404\u7a2e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u3064\u3044\u3066\u88682\u306b\u793a\u3059\uff0e<\/p>\n\n\n\n

\n
\n
\"\"<\/figure><\/div><\/div>\n<\/div>\n\n\n\n
\n

\u88681\u3000\u8857\u4e26\u307f\u30e2\u30c7\u30eb\u306e\u7279\u5fb4<\/p>\n<\/figure>\n

\n\n\n\n\n\n
\u5efa\u7269\u306e\u5411\u304d<\/td>\n\n

\u4e00\u69d8\u30e9\u30f3\u30c0\u30e0<\/p>\n<\/td>\n<\/tr>\n

\u5927\u5730\u9762\u9ad8<\/td>\n\n

\u8003\u616e\u53ef\u80fd<\/p>\n<\/td>\n<\/tr>\n

\u5efa\u7269\u9593\u9694<\/td>\n\u4e00\u69d8\u30e9\u30f3\u30c0\u30e0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n<\/figure>\n

<\/p>\n

<\/p>\n

<\/p>\n\n\n\n\n\n

\n

\u88682 (a)\u3000\u8857\u4e26\u307f\u306b\u95a2\u3059\u308b\u30d1\u30e9\u30e1\u30fc\u30bf<\/p>\n<\/figure>\n

\n\n\n\n\n
\n

\u5efa\u7269\u5bc6\u5ea6<\/p>\n<\/td>\n

\n

\\(N_0\u3000(\u500b\/{\\rm km}^2)  \\)<\/p>\n<\/td>\n<\/tr>\n

\n

\u9ad8\u3055\\(h\\)\u4ee5\u4e0a\u306e\u5efa\u7269\u5bc6\u5ea6<\/p>\n<\/td>\n

\n

\\(
{\\displaystyle N(h)=N_0 \\cdot \\exp (-\\frac{h-h_0}{h_m-h_0})}
\u3000(\u500b\/{\\rm km}^2)
\\)<\/p>\n

\\(h_m\\)\uff1a\u5efa\u7269\u5e73\u5747\u9ad8<\/p>\n

\\(h_0\\)\uff1a\u5e02\u8857\u5730\uff08\u4e2d\u9ad8\u5c64\u5efa\u7269\uff09\u30a8\u30ea\u30a2\u306b\u304a\u3051\u308b\u5efa\u7269\u306e\u6700\u4f4e\u9ad8
\uff084\u968e\u5efa\u3066\u5efa\u7269\u9ad8\uff1a16 m\u3092\u4eee\u5b9a\uff09<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n<\/figure>\n

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<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n

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\n

\u88682 (b)\u3000\u906e\u853d\u4f53\uff08\u5efa\u7269\uff09\u306b\u95a2\u3059\u308b\u30d1\u30e9\u30e1\u30fc\u30bf<\/p>\n<\/figure>\n

\n\n\n\n\n
\n

\u5efa\u7269\u5f62\u72b6<\/p>\n<\/td>\n

\n

\u6b63\u65b9\u5f62<\/p>\n<\/td>\n<\/tr>\n

\n

\u5efa\u7269\u5e45\u306e\u5e73\u5747\u5024<\/p>\n<\/td>\n

\\(
w_m=w_0 \\{\\ 1-\\alpha \\cdot \\exp (- \\beta h) \\}\\
\\)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n<\/figure>\n

<\/p>\n

<\/p>\n

<\/p>\n\n\n\n

\n

\u88682 (c)\u3000\u5efa\u7269\u5e45\u306e\u5e73\u5747\u5024\u306b\u95a2\u3059\u308b\u30d1\u30e9\u30e1\u30fc\u30bf<\/p>\n<\/figure>\n

\n\n\n\n\n\n\n
\n

<\/p>\n<\/td>\n

\n

\u9ad8\u3055\\(h\\)\u306e\u6761\u4ef6<\/p>\n<\/td>\n

\n

\\(w_0\\) (m)<\/p>\n<\/td>\n

\n

\\(\u03b1\\)<\/span><\/p>\n<\/td>\n

\n

\\(\u03b2\\) (m-1<\/sup>)<\/p>\n<\/td>\n<\/tr>\n

\n

\u5e02\u8857\u5730\uff08\u4e2d\u9ad8\u5c64\u5efa\u7269\uff09<\/p>\n<\/td>\n

\n

\\(h>h_0\\)<\/p>\n<\/td>\n

\n

55<\/p>\n<\/td>\n

\n

1.1<\/p>\n<\/td>\n

\n

0.025<\/p>\n<\/td>\n<\/tr>\n

\n

<\/p>\n

\u90ca\u5916\u5730\uff08\u4f4e\u5c64\u5efa\u7269\uff09<\/p>\n<\/td>\n

\n

\\(h<h_b\\)<\/p>\n<\/td>\n

\n

15<\/p>\n<\/td>\n

\n

0.55<\/p>\n<\/td>\n

\n

0.045
(0.18\/4)<\/p>\n<\/td>\n<\/tr>\n

\n

\\(h\u2265h_b\\)<\/p>\n<\/td>\n

\n

80<\/p>\n<\/td>\n

\n

1.0<\/p>\n<\/td>\n

\n

0.0114
(0.0456\/4)<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

<\/p>\n

<\/p>\n

<\/p>\n\n\n\n

\uff08\\(h_b\\)\uff1a3\u968e\u5efa\u3066\u5efa\u7269\u9ad8\uff1a12 m\u3092\u8a2d\u5b9a\uff09
<\/p>\n\n\n\n

\u4e2d\u9ad8\u5c64\u5efa\u7269\u30a8\u30ea\u30a2\u306e\u898b\u901a\u3057\u7387[\uff11][3]<\/span><\/strong><\/p>\n\n\n\n

\u57fa\u5730\u5c40\u304b\u3089\u306e\u8ddd\u96e2\\(r {\\rm (km)} \\)\u306e\u533a\u9593\u5168\u4f53\u306e\u898b\u901a\u3057\u7387\\(p_v (r)\\)\u306f\u6b21\u5f0f\u3067\u4e0e\u3048\u3089\u308c\u308b\uff0e<\/p>\n\n\n\n

\\(
{\\displaystyle P_v(r)= \\exp \\left(-\\frac{r}{R_v}\\right)} \\\\
\\tag{1}
\\)<\/p>\n\n\n\n

\u3053\u3053\u3067\uff0c
\\(
{\\displaystyle R_v=\\frac{250\u03b3}{N_0w_p \\{\\ 1-\\exp (-\u03b3) \\}\\ } \\exp \\left( \\frac{h_S-h_0}{h_m-h_0} \\right) }\u3000\u3000{\\rm (km)} \\\\
\\tag{2}
\\)<\/p>\n\n\n\n

\\(
{\\displaystyle w_p=\\frac{w_0}{\\pi} \\left[ 1- \\frac{\u03b1 \\{\\ 1-\\exp(-\u03b4\u03b3) \\}\\ }{\u03b4^2 \\{\\ 1-\\exp(-\u03b3) \\}\\ } \\exp (-\u03b2h_S) \\right] }
\u3000\u3000{\\rm (m)} \\\\
\\tag{3}
\\)<\/p>\n\n\n\n

\\(
{\\displaystyle \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u03b3=\\frac{h_N-h_S}{h_m-h_0} ,\u3000 \u03b4=1+\u03b2(h_m-h_0) } \\\\
\\)<\/p>\n\n\n\n

\u3000\u5730\u4e0a\u9ad8\u3084\u5efa\u7269\u5206\u5e03\u304c\u5747\u4e00\u3067\u306a\u3044\u74b0\u5883\u306b\u304a\u3051\u308b\u4f1d\u642c\u8def\u306e\u898b\u901a\u3057\u7387\u306f\uff0c\u56f31\u306b\u793a\u3059\u69d8\u306b\uff0c\u5168\u4f53\u306e\u4f1d\u642c\u8def\u3092\u5efa\u7269\u5206\u5e03\u304a\u3088\u3073\u5730\u4e0a\u9ad8\u304c\u5909\u5316\u3059\u308b\u70b9\u3067\\(n\\)\u500b\u306e\u533a\u9593\u306b\u5206\u5272\u3057\uff0c\u5404\u533a\u9593\u5185\u3067\u5747\u4e00\u306a\u4f1d\u642c\u8def\u3068\u3059\u308b\u3053\u3068\u306b\u3088\u308a\uff0c\u5404\u533a\u9593\u306b\u304a\u3044\u3066\u4e0a\u8a18\u306e\\(P_v (r)\\)\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\uff0e\u305f\u3060\u3057\uff0c\u5404\u533a\u9593\u6bce\u306e\u57fa\u5730\u5c40\u9ad8\u304a\u3088\u3073\u7aef\u672b\u9ad8\u306f\uff0c\u533a\u9593\u5883\u754c\u70b9\u306b\u304a\u3051\u308b\u898b\u901a\u3057\u7dda\u306e\u9ad8\u3055\u3067\u4e0e\u3048\u308b\uff0e\\(i\\)\u756a\u76ee\u306e\u533a\u9593\u306e\u898b\u901a\u3057\u7387\u3092\\(p_{vi}\\)\u3068\u3059\u308b\u3068\uff0c\u5168\u533a\u9593\u3092\u901a\u3057\u305f\u898b\u901a\u3057\u7387\\(p_{vn}\\)\u306f\u6b21\u5f0f\u3067\u4e0e\u3048\u3089\u308c\u308b\uff0e<\/p>\n\n\n\n

\\(
{\\displaystyle P_{vn}(r)= \\prod_{i=1}^{n} P_{vi} } \\\\
\\) <\/p>\n\n\n\n

\u3000\u307e\u305f\uff0c\u8907\u6570\u306e\u57fa\u5730\u5c40\u306b\u3088\u308b\u898b\u901a\u3057\u7387\u3092\uff0c\u5c11\u306a\u304f\u3068\u3082\u4e00\u3064\u306e\u57fa\u5730\u5c40-\u7aef\u672b\u9593\u306b\u898b\u901a\u3057\u304c\u53d6\u308c\u308b\u78ba\u7387\uff08\u7b49\u4fa1\u898b\u901a\u3057\u7387\uff09\\(P_{ve}\\)\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3068\uff0c\u5404\u57fa\u5730\u5c40-\u7aef\u672b\u9593\u306e\u898b\u901a\u3057\u7387\u304c\u4e92\u3044\u306b\u72ec\u7acb\u3067\u3042\u308b\u3068\u4eee\u5b9a\u3067\u304d\u308b\u5834\u5408\uff0c\\(k\\)\u500b\u306e\u7121\u7dda\u30be\u30fc\u30f3\u304c\u91cd\u8907\u3057\u305f\u5834\u5408\u306e\\(P_{ve}\\)\u306f\u6b21\u5f0f\u3067\u8868\u3059\u3053\u3068\u304c\u51fa\u6765\u308b\uff0e<\/p>\n\n\n\n

\\(
{\\displaystyle P_{ve}=1-\\prod_{j=1}^{k} (1-P_{vj}) } \\\\
\\) <\/p>\n\n\n\n

\u3053\u3053\u3067\uff0c\\(P_{vj}\\)\u306f\uff0c\u7b2c\\(j\\)\u756a\u76ee\u306e\u57fa\u5730\u5c40\u3078\u306e\u898b\u901a\u3057\u7387\u3092\u8868\u3057\u3066\u3044\u308b\uff0e<\/p>\n\n\n\n

\u3000\u3053\u306e\u63a8\u5b9a\u6cd5\u306f\uff0c\u5efa\u7269\u306e\u9ad8\u3055\u5206\u5e03\u3068\u3057\u30664\u968e\u5efa\u3066\uff0816m\uff09\u4ee5\u4e0a\u306e\u5efa\u7269\u306e\u307f\u3092\u8003\u616e\u3057\u3066\u3044\u308b\u305f\u3081\uff0c\u53b3\u5bc6\u306b\u306f\u7aef\u672b\u9ad8\u304c12m\uff083\u968e\u5efa\u3066\u5efa\u7269\u306e\u9ad8\u3055\uff09\u4ee5\u4e0a\u306e\u5834\u5408\u306b\u306e\u307f\u6709\u52b9\u306a\u65b9\u6cd5\u3067\u3042\u308b\uff0e\u3057\u304b\u3057\u306a\u304c\u3089\uff0c\u5927\u90fd\u5e02\u90e8\u306e\u5e02\u8857\u5730\u4e2d\u5fc3\u90e8\u7b49\u306b\u304a\u3044\u3066\uff0c 3\u968e\u5efa\u3066\uff0812m\uff09\u4ee5\u4e0b\u306e\u5efa\u7269\u304c\u5341\u5206\u306b\u5c11\u306a\u3044\u3068\u898b\u505a\u305b\u308b\u5730\u57df\u3067\u3042\u308c\u3070\uff0c12m\u672a\u6e80\u306e\u4f4e\u7aef\u672b\u9ad8\u306b\u5bfe\u3057\u3066\u3082\u5341\u5206\u306b\u898b\u901a\u3057\u7387\u306e\u63a8\u5b9a\u3092\u884c\u3046\u3053\u3068\u304c\u53ef\u80fd\u3067\u3042\u308b\uff0e
\u3000\u4e00\u65b9\u3067\uff0c\u90ca\u5916\u5730\uff08\u4f4f\u5b85\u5730\uff09\u306e\u69d8\u306b3\u968e\u5efa\u3066\uff0812m\uff09\u4ee5\u4e0b\u306e\u5efa\u7269\u306e\u6570\u304c\u7121\u8996\u3067\u304d\u306a\u3044\u5834\u5408\u306b\u3064\u3044\u3066\u306f\uff0c12m\u672a\u6e80\u306e\u4f4e\u7aef\u672b\u9ad8\u306b\u5bfe\u3059\u308b\u898b\u901a\u3057\u7387\u306e\u8a08\u7b97\u306f\u4ee5\u964d\u306b\u793a\u3059\u4f4e\u5c64\u5efa\u7269\u7fa4\u3092\u53d6\u308a\u6271\u3046\u305f\u3081\u306b\u62e1\u5f35\u3055\u308c\u305f\u898b\u901a\u3057\u7387\u306e\u63a8\u5b9a\u6cd5[2][3]\u3092\u7528\u3044\u308b\u5fc5\u8981\u304c\u3042\u308b\uff0e<\/p>\n\n\n\n

\u90ca\u5916\u5730\uff08\u4f4e\u5c64\u5efa\u7269\u7fa4\uff09\u306e\u898b\u901a\u3057\u7387[2][3]<\/span><\/strong><\/p>\n\n\n\n

\u65b0\u305f\u306b\uff0c\u4e0b\u8a18\u306b\u793a\u3059\u5909\u6570\u3092\u5b9a\u7fa9\u3059\u308b\uff0e
\\(h_B\\)\uff1a\u5206\u5e03\u306e\u63a5\u7d9a\u70b9\u306e\u9ad8\u3055 \uff1d 3\u968e\u5efa\u3066\u5efa\u7269\u306e\u9ad8\u3055 = 12 \uff4d
\\(h_L\\)\uff1a\\(h_B\\)\u672a\u6e80\u306e\u5efa\u7269\u306e\u6700\u4f4e\u9ad8 = 1.5\u968e = 6 m
\\(h_{mL}\\)\uff1a\\(h_B\\)\u672a\u6e80\u306e\u5efa\u7269\u306e\u5e73\u5747\u9ad8 \uff08m\uff09
\\(h_{mB}\\)\uff1a\\(h_B\\)\u4ee5\u4e0a\u306e\u5efa\u7269\u306e\u5e73\u5747\u9ad8 \uff08m\uff09
\\(N_L\\)\uff1a\u5168\u5efa\u7269\u5bc6\u5ea6 \uff08\u500b\/km2<\/sup>\uff09
\\(N_B\\)\uff1a\\(h_B\\)\u4ee5\u4e0a\u306e\u5efa\u7269\u5bc6\u5ea6 \uff08\u500b\/km2<\/sup>\uff09
\\(r_B\\)\uff1a\u898b\u901a\u3057\u7dda\u304c\u9ad8\u305512m\u3092\u8de8\u3050\u8ddd\u96e2\uff08km\uff09<\/p>\n\n\n\n

\u3053\u3053\u3067\uff0c
\\(
{\\displaystyle h_{mL}=h_L- \\frac{h_B-h_L}{\\log_e (N_B)-\\log_e (N_L)} } \\\\
\\)
\\(
{\\displaystyle h_{mB}=h_m-4 } \\\\
\\)
\\(
{\\displaystyle N_L=2.83 \\times 10^5 \\cdot N_0^{-0.056} (h_m-h_0)^{-2.056} } \\\\
\\)
\\(
{\\displaystyle N_B=N_0 \\exp \\left( -\\frac{h_B-h_0}{h_m-h_0} \\right) } \\\\
\\)
\\(
{\\displaystyle r_B= \\frac{h_N-h_B}{h_N-h_S} r } \\\\
\\)
<\/p>\n\n\n\n

(a)\u3000\\(h_N>h_B\\)\u304b\u3064\\(h_S>h_B\\)\u306e\u5834\u5408<\/strong>
\u3000(1)\uff5e(3)\u5f0f\u306b\u304a\u3044\u3066\uff0c\\(h_m=h_{mB}\uff0cN_0=N_B\uff0ch_0=h_B\\)\u3068\u7f6e\u304d\u63db\u3048\uff0c\u898b\u901a\u3057\u7387\\(P_v (r)\\)\u3092\u5f97\u308b\uff0e
\\(
{\\displaystyle P_v (r)= \\exp \\left( -\\frac{r}{R_v} \\right) } \\\\
\\)
\\(
{\\displaystyle R_v= \\frac{250\u03b3}{N_B w_p \\{\\ 1- \\exp (-\u03b3) \\}\\ } \\exp \\left( \\frac{h_S-h_B}{h_{mB}-h_B} \\right)
\u3000{\\rm (km)} } \\\\
\\)
\\(
{\\displaystyle w_p= \\frac{w_0}{\\pi} \\left[ 1-\\frac{\u03b1 \\{\\ 1-\\exp (-\u03b4\u03b3) \\}\\ } {\u03b4^2 \\{\\ 1-\\exp (-\u03b3) \\}\\ } \\exp (-\u03b2h_S) \\right]
\u3000{\\rm (m)} } \\\\
\\)
\\(
{\\displaystyle \u03b3= \\frac{h_N-h_S}{h_{mB}-h_B} } \\\\
\\)
\\(
{\\displaystyle \u03b4=1+\u03b2(h_{mB}-h_B) } \\\\
\\) <\/p>\n\n\n\n

(b)\u3000\\(h_N>h_B\\)\u304b\u3064\\(h_S\u2264h_B\\)\u306e\u5834\u5408<\/strong>
\u3000\u2460\u3000\\(h>h_B\\)\u306e\u533a\u9593<\/strong>
\u3000(1)\uff5e(3)\u5f0f\u306b\u304a\u3044\u3066\uff0c\\(h_m=h_{mB}\uff0cN_0=N_B\uff0ch_0=h_B\uff0ch_S=h_B\\)\u3068\u7f6e\u304d\u63db\u3048\uff0c\u898b\u901a\u3057\u7387\\(P_{vH} (r_B)\\)\u3092\u5f97\u308b\uff0e
\\(
{\\displaystyle P_{vH} (r_B)= \\exp \\left( -\\frac{r_B}{R_{vH}} \\right) } \\\\
\\)
\\(
{\\displaystyle R_{vH}= \\frac{250\u03b3}{N_B w_p \\{\\ 1- \\exp (-\u03b3) \\}\\ }
\u3000{\\rm (km)} } \\\\
\\)
\\(
{\\displaystyle w_p= \\frac{w_0}{\\pi} \\left[ 1-\\frac{\u03b1 \\{\\ 1-\\exp (-\u03b4\u03b3) \\}\\ } {\u03b4^2 \\{\\ 1-\\exp (-\u03b3) \\}\\ } \\exp (-\u03b2h_B) \\right]
\u3000{\\rm (m)} } \\\\
\\)
\\(
{\\displaystyle \u03b3= \\frac{h_N-h_B}{h_{mB}-h_B} } \\\\
\\)
\\(
{\\displaystyle \u03b4=1+\u03b2(h_{mB}-h_B) } \\\\
\\)

\u3000\u2461\u3000\\(h\u2264h_B\\) \u306e\u533a\u9593<\/strong>
\u3000(1)\uff5e(3)\u5f0f\u306b\u304a\u3044\u3066\uff0c\\(h_m=h_{mL}\uff0cN_0=N_L\uff0ch_0=h_L\uff0ch_N=h_B\\)\u3068\u7f6e\u304d\u63db\u3048\uff0c\u898b\u901a\u3057\u7387\\(P_{vL} (r-r_B)\\)\u3092\u5f97\u308b\uff0e
\\(
{\\displaystyle P_{vL} (r-r_B)= \\exp \\left( -\\frac{r-r_B}{R_{vL}} \\right) } \\\\
\\)
\\(
{\\displaystyle R_{vL}= \\frac{250\u03b3}{N_L w_p \\{\\ 1- \\exp (-\u03b3) \\}\\ } \\exp \\left( \\frac{h_S-h_L}{h_{mL}-h_L} \\right)
\u3000{\\rm (km)} } \\\\
\\)
\\(
{\\displaystyle w_p= \\frac{w_0}{\\pi} \\left[ 1-\\frac{\u03b1 \\{\\ 1-\\exp (-\u03b4\u03b3) \\}\\ } {\u03b4^2 \\{\\ 1-\\exp (-\u03b3) \\}\\ } \\exp (-\u03b2h_S) \\right]
\u3000{\\rm (m)} } \\\\
\\)
\\(
{\\displaystyle \u03b3= \\frac{h_B-h_S}{h_{mL}-h_L} } \\\\
\\)
\\(
{\\displaystyle \u03b4=1+\u03b2(h_{mL}-h_L) } \\\\
\\)
\u3000\u3053\u306e\u6642\uff0c\u4f4e\u5c64\u5efa\u7269\u7fa4\u3092\u542b\u3080\u57fa\u5730\u5c40\uff0d\u7aef\u672b\u9593\u306e\u898b\u901a\u3057\u7387\\(P_v (r)\\)\u306f\uff0c\u57fa\u5730\u5c40\u304b\u3089\u8ddd\u96e2\\(r_B\\)\u307e\u3067\u306e\u898b\u901a\u3057\u7387\\(P_{vH} (r_B )\\)\u3068\uff0c\\(r_B\\)\u304b\u3089\u7aef\u672b\u9593\u306e\u898b\u901a\u3057\u7387\\(P_{vL} (r-r_B )\\)\u3068\u306e\u7a4d\u3068\u3057\u3066\u6b21\u5f0f\u3067\u8a08\u7b97\u3055\u308c\u308b\uff0e
\\(
{\\displaystyle P_v(r)=P_{vH}(r_B) \\times P_{vL}(r-r_B) } \\\\
\\) <\/p>\n\n\n\n

(c)\u3000\\(h_N\u2264h_B\\) \u304b\u3064 \\(h_S\u2264h_B\\)\u306e\u5834\u5408<\/strong>
\u3000(1)\uff5e(3)\u5f0f\u306b\u304a\u3044\u3066\uff0c\\(h_m=h_{mL}\uff0cN_0=N_L\uff0ch_0=h_L\\)\u3068\u7f6e\u304d\u63db\u3048\uff0c\u898b\u901a\u3057\u7387\\(P_v (r)\\)\u3092\u5f97\u308b\uff0e
\\(
{\\displaystyle P_v (r)= \\exp \\left( -\\frac{r}{R_v} \\right) } \\\\
\\)
\\(
{\\displaystyle R_v= \\frac{250\u03b3}{N_B w_p \\{\\ 1- \\exp (-\u03b3) \\}\\ } \\exp \\left( \\frac{h_S-h_L}{h_{mL}-h_L} \\right)
\u3000{\\rm (km)} } \\\\
\\)
\\(
{\\displaystyle w_p= \\frac{w_0}{\\pi} \\left[ 1-\\frac{\u03b1 \\{\\ 1-\\exp (-\u03b4\u03b3) \\}\\ } {\u03b4^2 \\{\\ 1-\\exp (-\u03b3) \\}\\ } \\exp (-\u03b2h_S) \\right]
\u3000{\\rm (m)} } \\\\
\\)
\\(
{\\displaystyle \u03b3= \\frac{h_N-h_S}{h_{mL}-h_L} } \\\\
\\)
\\(
{\\displaystyle \u03b4=1+\u03b2(h_{mL}-h_L) } \\\\
\\) <\/p>\n\n\n\n

\u8a08\u7b97\u4f8b<\/h3>\n\n\n
\n
\"\"
\u56f32\u3000\u898b\u901a\u3057\u7387\u306e\u57fa\u5730\u5c40\u9ad8\u7279\u6027\u8a08\u7b97\u4f8b<\/span><\/figcaption><\/figure><\/div>\n\n
\n
\"\"
\u56f33\u3000\u898b\u901a\u3057\u7387\u306e\u7aef\u672b\u9ad8\u7279\u6027\u8a08\u7b97\u4f8b<\/span><\/figcaption><\/figure><\/div>\n\n\n

\u53c2\u7167<\/h2>\n\n\n\n[1] E,Ogawa, et al., \u201cPropagation Path visibility estimation for radio local distribution systems in built-up areas,\u201d IEEE Trans. Commun. COM-34, [7], pp.721-724., 1986.<\/p>\n\n\n\n[2] \u4f50\u85e4\u660e\u96c4\uff0c\u5c0f\u5ddd\u82f1\u4e00\uff0c\u201d\u90fd\u5e02\u5185\u306b\u304a\u3051\u308b\u4f4e\u5c64\u898b\u901a\u3057\u7387\u306e\u63a8\u5b9a\u6cd5\u3068\u7121\u7dda\u30be\u30fc\u30f3\u69cb\u6210\u6cd5\uff0c\u201d \u4fe1\u5b66\u8ad6J73-B-II [6]\uff0cpp.293-300, 1990.<\/p>\n\n\n\n[3] \u7d30\u77e2\u826f\u96c4\uff0c\u4ed6\uff0c\u7b2c2\u90e8\u7b2c23\u7ae0 \u90fd\u5e02\u5185\u30a2\u30af\u30bb\u30b9\u7121\u7dda\u901a\u4fe1\u306e\u4f1d\u642c\uff0c\u96fb\u6ce2\u4f1d\u642c\u30cf\u30f3\u30c9\u30d6\u30c3\u30af\uff0c\u30ea\u30a2\u30e9\u30a4\u30ba\u793e\uff0cpp.200-245, 1999.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u898b\u901a\u3057\u7387\u306e\u8aac\u660e \u3000\u9ad8\u5468\u6ce2\u6570\u5e2f\u306b\u304a\u3051\u308b\u7121\u7dda\u30be\u30fc\u30f3\u8a2d\u8a08\u3067\u306f\uff0c\u9001\u53d7\u4fe1\u70b9\u9593\u306e\u898b\u901a\u3057\u6709\u7121\u306e\u8a55\u4fa1\uff08\u898b\u901a\u3057\u30a8\u30ea\u30a2\u306e\u63a8\u5b9a\uff09\u304c\u91cd\u8981\u306a\u691c\u8a0e\u9805\u76ee\u3068\u306a\u308b\uff0e\u898b\u901a\u3057\u6709\u7121\u306e\u8a55\u4fa1\u306f\uff0c\u3042\u308b\u74b0\u5883\u306b\u304a\u3044\u3066\u9001\u53d7\u4fe1\u70b9\u3092\u8a2d\u5b9a\u3057\u305f\u5834\u5408\u306b\uff0c\u305d\u306e\u9001\u53d7\u4fe1\u70b9\u9593\u306b\u898b\u901a\u3057\u304c\u53d6\u308c […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":12073,"menu_order":13,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-10605","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/10605","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/comments?post=10605"}],"version-history":[{"count":160,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/10605\/revisions"}],"predecessor-version":[{"id":15735,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/10605\/revisions\/15735"}],"up":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/12073"}],"wp:attachment":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/media?parent=10605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}