IV. CÁN 浦H 姶閏NG 郁N ): PGS.TS Ph mH ng Liên
m 泳e"8k隠 uc h院 64-QAM
5.4 So sánh BER c栄a V-OFDM gi英a kênh truy隠n fading và AWGN.
Hình 5.23 So sánh BER c栄a V-OFDM gi英a kênh truy隠n fading và AWGN. Nhｆn xét
=>ChＸv"n⇔ぢng BER cてa kênh truyｚp"hcfkpi"mfio"j￢p"uq"xずi kênh truyｚn nhiいu cじng AWGN.
Do bぞi kênh truyｚn fading có tぐe"8じvjc{"8ごi nên dｄp"8ｘn có hiうp"v⇔ぢng doppler.
5.5 K院t lu壱n k院t qu違 mô ph臼ng
Nhｆn xét
¬ D詠a các k院t qu違 trên ta có nh壱p"zfiv"pj逢"ucw<
¬ Qua Vector Delay khác nhau có m泳e" 8k隠u ch院 l亥p" n逢嬰t là 4QAM;16QAM;64QAM thì Ber c栄a Vector OFDM t嘘v"j挨p"Dgt"e栄a OFDM. GiＶi thích:
¬ Vector ít b鵜 違pj"j逢荏ng b荏i d詠 d鵜ch t亥p"Fqrngt"j挨p"uq"x噂i OFDM.
Mjk"vjc{"8鰻i Bandwidth, Fc, v壱n t嘘c gi違p"8欝 BER s胤mj»pi"vjc{"8鰻i nhi隠ụ
GiＶi thích:
¬ Ch雨 có L t亥n s嘘 tr違i ph鰻 vt‒p" 3" d<pi" vj»pi fq" M ej" vj逢噂c IFFT/FFT c栄a VOFDM gi違o"8k"O"n亥n so v噂i OFDM, vì th院 p‒p"vtƒpj"8逢嬰c s詠 sai l羽ch t亥n s嘘."8違m b違q"8逢嬰c s詠 tr詠c giao gi英a các sóng mang con; làm gi違m nhi宇u ICI
EJ姶愛PI"8""M蔭T LU一P"XÉ"J姶閏NG PHÁT TRI韻N C曳A LU一P"X;P
6.1 K院t lu壱n 8隠 tài
Thông qua lu壱p"x<p"p {"go"vt·pj"d {"n#"vjw{院t v隠 Vector OFDM, nh英pi"逢w" pj逢嬰e"8k吋m c栄a Vector OFDM, bên c衣pj"8„"n "o»"j·pj"m‒pj"vtw{隠n trong thông tin vô tuy院n và nh英ng 違pj"j逢荏ng mà nó gây ra cho nh英ng tín hi羽u truy隠p"swc0"A欝ng th運i nh英ng ph亥n chính trong lu壱p" x<p" e pi" vt·pj" d {" eƒe" mk吋w" 逢噂e" n逢嬰ng kênh truy隠n khác nhau d詠a vào ki吋u s逸p x院p Pilot. Ph亥n mô ph臼pi"e pi"v壱p trung vào vi羽c mô ph臼ng bi吋w"8欝 BER c栄a V-OFDM v噂k"eƒe"8瓜 l嬰i phân t壱p khác nhau (thay
8鰻i v隠 v壱n t嘘ẹd<pi"vj»pi....); các kh嘘k"xgevqt"mjƒe"pjcw"mjk"vjc{"8鰻k"O"x "N="e pi" pj逢"ik英a mà hóa và không mã hóa tín hi羽ụ
Trong n瓜i dung lu壱p" x<p." j衣n ch院 v隠 ch医v" n逢嬰ng c栄a V-OFDM thông qua kênh truy隠p"Hcfkpi"8c"8逢運pi"8衣v"8逢嬰e"8瓜 l嬰i phân t壱r."o«"8逢嬰c trình bàỵ Trình
d {"8逢嬰e"8員e"v pj"8嘘i x泳ng c栄a h羽 th嘘ng V-OFDM. B茨ng vi羽c s穎 d映ng công c映 lý thuy院v"8衣i s嘘 chúng ta ch泳ng minh r茨pi"8瓜 l嬰i phân t壱p liên k院t v噂i V-OFDM thúc
8育y v噂i s詠 v<pi"n‒p"e栄c"O"pj逢pi"p„"8逢嬰c gi噂i h衣n b叡i s嘘 n逢嬰ng kênh. M瓜t vài VB c映 th吋 mà chi隠u d k"v逢挨pi"8逢挨pi"x噂i t鰻ng s嘘 kênh không th吋8衣v"8逢嬰c t嘘k"8c"8瓜 l嬰i phân t壱r"pj逢pi"8衣v"8逢嬰c t嘘k"8c"8瓜 l嬰i mã trong h羽 th嘘ng V-OFDM.
J挨p"p英a, vi羽e"v<pi"O"違pj"j逢荏pi"8院n vi羽c truy nh壱r"8瓜 l嬰i mã cho m厩i VB. K院t qu違 mô ph臼ng minh h丑a r茨ng vi羽c l詠a ch丑n chi隠w"f k"xgevqt"v逢挨pi"8逢挨pi"x噂i s嘘n逢嬰pi"m‒pj"8吋 ch嘘ng l衣i s詠 cân b茨ng t嘘t gi英a ch医v"n逢嬰ng h羽 th嘘pi"x "8瓜 ph泳c t衣p tính toán. Vi羽c ch雨 ra c栄a phân tích và k院t lu壱n có l胤 cung c医p cái nhìn sâu r瓜ng t噂i vi羽c thi院t k院 h羽 thông V-OFDM th詠c t院.
6.2Nh英ng h衣n ch院 và j逢噂ng phát tri吋n c栄c"8隠 tài
6.2.1 J衣p"ej院"e栄c"8隠"v k<
Ü Ej逢c"f́pi"eƒe"d瓜 gi違k"o«"pj逢"vwrbo hay cách lo衣i gi違k"o«"mjƒe"8吋 so sánh.
80404"J逢噂ng phát tri吋n c栄c"8隠 tài:
Ü Nghiên c泳u sâu các k悦 thu壱t CI nh茨m c違i thi羽p"RCRT"x "ETX"QHFO"8吋 c違i thi羽n ch医v"n逢嬰ng BER.
Ü Nghiên c泳u h羽 th嘘ng Precode V-OFDM 8吋 c違i thi羽n ch医v"n逢嬰ng
Ü Dùng các b瓜 l丑e"8吋 c違i thi羽n ch医v"n逢嬰ng
Ü Dùng các thu壱v"vqƒp"逢噂e"n逢嬰ng ...
Ü Nghiên c泳u h羽 th嘘ng MIMO-V-OFDM
Ü 永ng d映ng h羽 th嘘ng cho môi tt逢運pi"vjc{"8鰻i m衣nh theo th運k"ikcp"pj逢"truy隠n thông vtqpi"o»k"vt逢運pi"f逢噂k"p逢噂c
Ü 永ng d映ng trong các h羽 th嘘ng truy隠n hình, wimax...
Ü J逢噂ng m噂i c栄c" 8隠 tài : ÐAƒpj" ikƒ" j羽 th嘘ng MIMO-V-OFDM trong môi
TÀI LI烏U THAM KH謂O
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[2] Chenggao Han, Takeshi Hashimoto, and Naoki Suehiro, ÐEqpuvgnncvkqp-Rotated
Xgevqt"QHFO"cpf"kvu"Rgthqtocpeg"Cpcn{uku"qxgt"Tc{ngkij"Hcfkpi"EjcppgnụÑ"kggg"
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[3]Yabo Li, Member, IEEE, Ibo Ngebani, Xiang-Igp" Zkc." Hgnnqỵ." ÐQp"
Performance of Vector OFDM Ykvj"Nkpgct"TgegkxgtụÑ"kggg"vtcpucevkqpu"qp"ukipcn"
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]6̲" " Igqtikc" Twiwoktc." Icpi" Ycpicpf" Piw{gp" Vjk" Fkgw" Nkpj." ÐEcttkgt"
Interferometry-based Vector-OFDM Robust to ISI Channel and with Reduced
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]7̲" " Icq" ¥JQW." Rkpi¦jk" HCP." Nk" JCQ." Pcqmk" UWGJKTQ" ÐFHV" Uetcodnkpi" Xgevqt"QHFO"cpf"Kvu"Rgthqtocpeg"Cpcn{ukuÑ"4233"Vjktf"Kpvgtpcvkqpcn"Eqphgtgpeg"
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]8̲" " Utkujvcpuj" Rcvjcm" cpf" Jkocpujw" Ujctoc" " ÐEjcppel Estimation in OFDM
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Software Engineering 2013.
[7] Ender Ayanoglu, VK Jones, Gregory G. Raleigh, James Gardner, Derek
Igtncej." Mctko" Vqwuuk" Ekueq" U{uvgou" ÐV-OFDM Broadband Wireless
Vtcpuokuukqp"cpf"Kvu"Cfxcpvcigu"qxgt"Ukping"Ecttkgt"OqfwncvkqpÑ0"
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Maximum Diversity Gain for Single-Cpvgppc" Xgevqt" QHFO" U{uvgọÑ" KGGG"
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Nulls and With Reduced Cyclic Prefix Length in Single Transmit Antenna
U{uvgoụÑ""kggg"vtcpucevkqpu"qp"eqoowpkecvkqpụ"xqn0"6;."pq0":."cwiwuv"42230
[10] Hong Zhang andXiang-Igp"Zkc.""ÐKvgtcvkxg"Fgeqfkpi"cpf"Fgoqfwncvkqp"hqt"
Single-Cpvgppc"Xgevqt"QHFO"U{uvgoụÑ"kggg"vtcpucevkqpu"qp"xgjkewnct"vgejpqnqi{."
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adaptive vector channel allocation for scalable video transmission over frequency
ugngevkxg""hcfkpi"ejcppgnụÑ"KGGG"Vtcpu0"Oqdkng"Eqorwvkpị"xqn0"3."pq0"4."rr0"354Î
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QHFO""u{uvgoụÑ""KGGG"Vtcpu0""Yktgnguu""Eqoowp0.""xqn0""6.""pq0"7."rr0"4676Î
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]38̲""L0"C0"¥jcpị"C0"Lc{cncvj.""cpf"[0"Ejgp.""ÐCu{oogvtke"QHFO"u{uvgou"dcugf" qp"nc{gtgf""HHV"uvtwevwtg.Ñ""KGGG"Uignal Process. Lett., vol. 14, nọ 11, pp. 812Î
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]3:̲" " L0" " Dqwvtqu" " cpf" " G0" Xkvgtdq." " ÐUkipcn" " urceg" " fkxgtukv{: a power- and bandwidth- ghÝekgpv""fkxgtukv{""vgejpkswg""hqt"vjg"Tc{ngkij"hcfkpi"ejcp- pgn.Ñ"KGGG"
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[25] Ph衣m H欝pi"Nk‒p."A員ng Ng丑c Khoa, Tr亥p"Vjcpj"Rj逢挨pị"ÐOCVNCD"x "泳ng d映ng trong vi宇p"vj»piÑ."PZD"A衣i h丑c Qu嘘c Gia TPHCM, 2006.
[26] Baosheng Lk.Rgvgt" Yknngvv." ÐOKOQ-OFDM for High Rate Underwater
Ceqwuvke"EqoowpkecvkqpuÑ"KGGG0
]49̲"""""Dcqujgpi"Nk."Ujgpink"¥jqw."Oknkec"Uvqlcpqxke"""ÐOKOQ-OFDM Over An
H丑vàtên: Ph衣mNguy宇nQu嘘eJ逢pi
Pi {."vjƒpi".p<oukpj"<"3812413;:70" P挨kukpj<"MjƒpjJ”c.
A鵜ach雨liênl衣c: 89/32Nguy宇nH欝piA q."R36."S"V¤pd·pj, TPHCM.
SWè"VTîPJ"AÉQ"V萎O:
2003 Î 2008<"Ukpjxk‒pvt逢運piA衣iH丑cBáchKhoa TPHCM.
2011 Î 2009: H丑cviêncaoh丑cvt逢運piA衣iH丑cBáchKhoa TPHCM.
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2008 Î 2011: Nhânviênk悦thu壱tT壱r8q pXiettel. 2011 Î 2013: Nhânviênk悦thu壱ttruy隠nhình BDẠ