{"id":4252,"date":"2015-07-03T13:30:12","date_gmt":"2015-07-03T13:30:12","guid":{"rendered":"https:\/\/www.techopedia.com\/definition\/non-line-of-sight\/"},"modified":"2015-07-03T13:30:12","modified_gmt":"2015-07-03T13:30:12","slug":"non-line-of-sight","status":"publish","type":"definition","link":"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos","title":{"rendered":"Non-Line Of Sight"},"content":{"rendered":"<h2><span id=\"what_does_non-line_of_sight_mean\">What Does Non-Line Of Sight Mean?<\/span><\/h2>\n<p>Non-line of sight (NLOS) refers to the path of propagation of a radio frequency (RF) that is obscured (partially or completely) by obstacles, thus making it difficult for the radio signal to pass through. Common obstacles between radio transmitters and radio receivers are tall buildings, trees, physical landscape and high-voltage power conductors. While some obstacles absorb and others reflect the radio signal; they all limit the transmission ability of signals.<\/p>\n<p>Non-line of sight is also known as near line of sight.\n<\/p>\n<h2><span id=\"techopedia_explains_non-line_of_sight\">Techopedia Explains Non-Line Of Sight<\/span><\/h2>\n<p>Non-line of sight is a term often used when the radio transmitter and receiver are not in the direct visual line of sight, and this is dealt with by the use of multiple paths in signal propagation. Non-line of sight can be overcome with the use of antennas and other such communication devices. Distance also plays a significant role in lowering the receiving power of a signal, leaving a poor transmission system. Modern computer networking\u2019s biggest concern is to effectively reduce the NLOS, and this is done on wireless networks by using relays at various points so that the signal is transmitted around the obstruction without loss of data or transmission quality. Multipath signal propagation is also widely used.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does Non-Line Of Sight Mean? Non-line of sight (NLOS) refers to the path of propagation of a radio frequency (RF) that is obscured (partially or completely) by obstacles, thus making it difficult for the radio signal to pass through. Common obstacles between radio transmitters and radio receivers are tall buildings, trees, physical landscape and [&hellip;]<\/p>\n","protected":false},"author":7813,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","om_disable_all_campaigns":false,"footnotes":""},"definitioncat":[219,220],"class_list":["post-4252","definition","type-definition","status-publish","format-standard","hentry","definitioncat-networks","definitioncat-wireless-and-mobile"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Non-Line Of Sight (NLOS)? - Definition from Techopedia<\/title>\n<meta name=\"description\" content=\"This definition explains the meaning of Non-Line Of Sight and why it matters.\" \/>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Non-Line Of Sight\" \/>\n<meta property=\"og:description\" content=\"This definition explains the meaning of Non-Line Of Sight and why it matters.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos\" \/>\n<meta property=\"og:site_name\" content=\"Techopedia\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/techopedia\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@techopedia\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos\"},\"author\":{\"name\":\"Margaret Rouse\",\"@id\":\"https:\/\/www.techopedia.com\/#\/schema\/person\/f5dd538e31ee352d105b8af36c4268a5\"},\"headline\":\"Non-Line Of Sight\",\"datePublished\":\"2015-07-03T13:30:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos\"},\"wordCount\":215,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.techopedia.com\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos#respond\"]}],\"articleSection\":\"\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos\",\"url\":\"https:\/\/www.techopedia.com\/definition\/5077\/non-line-of-sight-nlos\",\"name\":\"What is Non-Line Of Sight (NLOS)? 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