{"product_id":"orthogonal-frequency-division-multiplexing-for-ye-geoffrey-li-9780387290959","title":"Orthogonal Frequency Division Multiplexing for Wireless Communications","description":"\u003cp\u003eFrequency division multiplexing (FDM) is a technology that transmits multiple signals simultaneously over a single transmission path, such as a cable or wireless system. Each signal travels within its own unique frequency range (carrier), which is modulated by the data (text, voice, video, etc.). \u003c\/p\u003e \u003cp\u003eOrthogonal FDM's (OFDM) spread spectrum technique distributes the data over a large number of carriers that are spaced apart at precise frequencies. This spacing provides the \"orthogonality\" in this technique which prevents the demodulators from seeing frequencies other than their own. The benefits of OFDM are high spectral efficiency, resiliency to RF interference, and lower multi-path distortion. This is useful because in a typical terrestrial broadcasting scenario there are multipath-channels (i.e. the transmitted signal arrives at the receiver using various paths of different length). Since multiple versions of the signal interfere with each other (inter symbol interference (ISI)) it becomes very hard to extract the original information. \u003c\/p\u003e \u003cp\u003eOFDM is sometimes called multi-carrier or discrete multi-tone modulation. It is the modulation technique used for digital TV in Europe, Japan and Australia. \u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Ye Geoffrey Li\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 0387290958\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9780387290959\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Springer\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 02\/07\/2006\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 308\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Hardcover\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 1.44lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.24h x 6.32w x 0.85d","brand":"Ye Geoffrey Li","offers":[{"title":"Hardcover","offer_id":48174875836671,"sku":"9780387290959","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_b2a33625-151b-4545-9a4c-77291480e081.jpg?v=1771331098","url":"https:\/\/www.whiterainbookhouse.com\/products\/orthogonal-frequency-division-multiplexing-for-ye-geoffrey-li-9780387290959","provider":"WR Book House","version":"1.0","type":"link"}