{"id":280,"date":"2020-05-14T23:23:58","date_gmt":"2020-05-14T23:23:58","guid":{"rendered":"https:\/\/migrate.5gworldpro.com\/5g-knowledge\/why-do-we-have-multiple-numerologies-in-5g.html"},"modified":"2020-05-14T23:23:58","modified_gmt":"2020-05-14T23:23:58","slug":"why-do-we-have-multiple-numerologies-in-5g","status":"publish","type":"post","link":"https:\/\/new.5gworldpro.com\/?p=280","title":{"rendered":"Why do we have multiple numerologies in 5G?"},"content":{"rendered":"\n

My friend:<\/em>\u00a0Hi Ibrahim, I have a question for you.<\/p>\n\n\n\n

Me:<\/em>\u00a0Please, go ahead.<\/p>\n\n\n\n

My friend:<\/em>\u00a0In 4G, we have one SCS which is 15KHz, while in 5G, there are multiple SCSs such as 15, 30, 60, 120 and 240KHz, so why do we have all these SCSs?<\/p>\n\n\n\n

Me:<\/em>\u00a0Actually, the support of multiple numerologies is considered one of the most outstanding 5G features when compared to LTE.<\/p>\n\n\n\n

My friend:<\/em>\u00a0Really, why?<\/p>\n\n\n\n

Me:<\/em>\u00a0The 5G freq band is huge (unlike the 4G freq band) from around 400MHz till 52.6GHz (according to Rel-15), so at different frequency bands we can use different numerologies to achieve different purposes. For example, at low freq bands, pathloss is lower and so coverage is better, so we can use lower SCS as it\u2019ll have large cell radius due to large CP (cyclic prefix) and high CP is achieved as we have long symbol duration (CP is a ratio of symbol duration).<\/p>\n\n\n\n

While at high freq bands, phase noise is increasing and so we use higher numerology to overcome it as it is more robust than lower numerology in combating phase noise.<\/p>\n\n\n\n

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

This is just one example as also for low latency requirements, short symbol duration is needed which means higher SCS.<\/p>\n\n\n\n

My friend:<\/em>\u00a0Thanks a lot.\u00a0<\/p>\n\n\n\n

Please check our last article and share this information to spread\u00a0it and make sure it is clear for everyone.<\/p>\n\n\n\n

Source: Ibrahim Sayed<\/em><\/p>\n\n\n\n

Linkedin Profile:\u00a0https:\/\/www.linkedin.com\/in\/ibrahim-sayed-88a7747-5g\/<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

My friend:\u00a0Hi Ibrahim, I have a question for you. Me:\u00a0Please, go ahead. My friend:\u00a0In 4G, we have one SCS which is 15KHz, while in 5G, there are multiple SCSs such as 15, 30, 60, 120 and 240KHz, so why do we have all these SCSs? Me:\u00a0Actually, the support of multiple numerologies is considered one of […]<\/p>\n","protected":false},"author":1,"featured_media":1208,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":{"0":"post-280","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-5g-knowledge"},"yoast_head":"\nWhy do we have multiple numerologies in 5G? - 5GWorldPro.com<\/title>\n<meta name=\"description\" content=\"What is definition of 5G numerology and 5G how is it different from 4G, more details in our article or check our 5G Training for more information\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.5gworldpro.com\/blog\/2020\/05\/14\/why-do-we-have-multiple-numerologies-in-5g\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why do we have multiple numerologies in 5G?\" \/>\n<meta property=\"og:description\" content=\"What is definition of 5G numerology and 5G how is it different from 4G, more details in our article or check our 5G Training for more information\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.5gworldpro.com\/blog\/2020\/05\/14\/why-do-we-have-multiple-numerologies-in-5g\/\" \/>\n<meta property=\"og:site_name\" content=\"E-Commerce Revolution\" \/>\n<meta property=\"article:published_time\" content=\"2020-05-14T23:23:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/new.5gworldpro.com\/wp-content\/uploads\/2020\/05\/5G-NEW.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"400\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/new.5gworldpro.com\/?p=280\",\"url\":\"https:\/\/www.5gworldpro.com\/blog\/2020\/05\/14\/why-do-we-have-multiple-numerologies-in-5g\/\",\"name\":\"Why do we have multiple numerologies in 5G? 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