{"id":52288,"date":"2024-04-15T23:37:12","date_gmt":"2024-04-15T23:37:12","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=52288"},"modified":"2024-04-15T23:37:12","modified_gmt":"2024-04-15T23:37:12","slug":"which-modulation-technique-is-used-by-gsm","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-modulation-technique-is-used-by-gsm\/","title":{"rendered":"Which modulation technique is used by GSM?"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;GMSK&#8221; option2=&#8221;BPSK&#8221; option3=&#8221;QPSK&#8221; option4=&#8221;GFSK&#8221; correct=&#8221;option1&#8243;]<!--more--><\/p>\n<p>The correct answer is: A. GMSK<\/p>\n<p>GMSK (Gaussian minimum-shift keying) is a modulation technique used in digital cellular networks, such as GSM. It is a type of frequency-shift keying (FSK) modulation in which the frequency of the carrier signal is modulated by a Gaussian pulse. This results in a signal with a very low out-of-band power, which makes it suitable for use in mobile networks where there is a lot of interference.<\/p>\n<p>BPSK (binary phase-shift keying) is a modulation technique in which the phase of a carrier signal is modulated between two states, 0 and 1. This results in a signal with a constant amplitude, but with a varying phase. BPSK is a simple and robust modulation technique, but it is not very efficient in terms of bandwidth.<\/p>\n<p>QPSK (quadrature phase-shift keying) is a modulation technique in which the phase of a carrier signal is modulated between four states, 0, 90, 180, and 270 degrees. This results in a signal with a constant amplitude, but with a varying phase. QPSK is more efficient than BPSK in terms of bandwidth, but it is also more complex to implement.<\/p>\n<p>GFSK (Gaussian frequency-shift keying) is a modulation technique in which the frequency of a carrier signal is modulated by a Gaussian pulse. This results in a signal with a very low out-of-band power, which makes it suitable for use in mobile networks where there is a lot of interference. GFSK is similar to GMSK, but it uses a different type of pulse.<\/p>\n<p>In conclusion, the correct answer is: A. GMSK.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;GMSK&#8221; option2=&#8221;BPSK&#8221; option3=&#8221;QPSK&#8221; option4=&#8221;GFSK&#8221; correct=&#8221;option1&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[199],"tags":[],"class_list":["post-52288","post","type-post","status-publish","format-standard","hentry","category-wireless-communication","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Which modulation technique is used by GSM?<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-modulation-technique-is-used-by-gsm\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which modulation technique is used by GSM?\" \/>\n<meta property=\"og:description\" content=\"[amp_mcq option1=&#8221;GMSK&#8221; 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