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Single carrier orthogonal multiple a...
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Myung, Hyung G.
Single carrier orthogonal multiple access technique for broadband wireless communications.
紀錄類型:
書目-電子資源 : 單行本
正題名/作者:
Single carrier orthogonal multiple access technique for broadband wireless communications./
作者:
Myung, Hyung G.
面頁冊數:
134 p.
附註:
Source: Dissertation Abstracts International, Volume: 68-04, Section: B, page: 2553.
Contained By:
Dissertation Abstracts International68-04B.
標題:
Engineering, Electronics and Electrical. -
電子資源:
Download PDF (下載PDF全文)
Single carrier orthogonal multiple access technique for broadband wireless communications.
Myung, Hyung G.
Single carrier orthogonal multiple access technique for broadband wireless communications.
- 134 p.
Source: Dissertation Abstracts International, Volume: 68-04, Section: B, page: 2553.
Thesis (Ph.D.)--Polytechnic University, 2007.
Broadband wireless mobile communications suffer from multipath frequency-selective fading. Orthogonal frequency division multiplexing (OFDM) and orthogonal frequency division multiple access (OFDMA), which are multicarrier communication techniques, have become widely accepted primarily because of its robustness against frequency selective fading channels. Despite the many advantages, OFDM and OFDMA suffer a number of drawbacks; high peak-to-average power ratio (PAPR), a need for an adaptive or coded scheme to overcome spectral nulls in the channel, and high sensitivity to frequency offset.Subjects--Topical Terms:
170927
Engineering, Electronics and Electrical.
Single carrier orthogonal multiple access technique for broadband wireless communications.
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Single carrier orthogonal multiple access technique for broadband wireless communications.
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Source: Dissertation Abstracts International, Volume: 68-04, Section: B, page: 2553.
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Adviser: David J. Goodman.
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Thesis (Ph.D.)--Polytechnic University, 2007.
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Broadband wireless mobile communications suffer from multipath frequency-selective fading. Orthogonal frequency division multiplexing (OFDM) and orthogonal frequency division multiple access (OFDMA), which are multicarrier communication techniques, have become widely accepted primarily because of its robustness against frequency selective fading channels. Despite the many advantages, OFDM and OFDMA suffer a number of drawbacks; high peak-to-average power ratio (PAPR), a need for an adaptive or coded scheme to overcome spectral nulls in the channel, and high sensitivity to frequency offset.
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Single carrier frequency division multiple access (SC-FDMA) which utilizes single carrier modulation at the transmitter and frequency domain equalization at the receiver is a technique that has similar performance and essentially the same overall structure as those of an OFDMA system. One prominent advantage over OFDMA is that the SC-FDMA signal has lower PAPR. SC-FDMA has drawn great attention as an attractive alternative to OFDMA, especially in the uplink communications where lower PAPR greatly benefits the mobile terminal in terms of transmit power efficiency and manufacturing cost. SC-FDMA is currently a working assumption for the uplink multiple access scheme in 3rd Generation Partnership Project Long Term Evolution (3GPP LTE).
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In this thesis, we first give a detailed overview of an SC-FDMA system. We then analyze analytically and numerically the peak power characteristics and propose a peak power reduction method that uses symbol amplitude clipping technique. We show that subcarrier mapping scheme and pulse shaping are significant factors that affect the peak power characteristics and that symbol amplitude clipping method is an effective way to reduce the peak power without compromising the link performance. We investigate multiple input multiple output (MIMO) spatial multiplexing technique in an SC-FDMA system using unitary precoded transmit eigen-beamforming with practical limitations. We also investigate channel-dependent scheduling for an uplink SC-FDMA system taking into account the imperfect channel information in the form of feedback delay. To accommodate both low and high mobility users simultaneously, we propose a hybrid subcarrier mapping method using orthogonal code spreading on top of SC-FDMA and show that it can have higher capacity gain than that of conventional subcarrier mapping scheme.
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Download PDF (下載PDF全文)
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