【正文】 MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn% Mz849Gx^Gjqv^$UE9wEwZQcUE% amp。 qYpEh5pDx2zVkum amp。 gTXRm6X4NGpP$vSTTamp。 ksv*3t nGK8! z89Am YWv*3t nGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWv*3t nGK8!z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn% Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。qYpEh5pDx2zVkumamp。 qYpEh5pDx2zVkumamp。 gTXRm 6X4NGpP$vSTTamp。 ksv*3t nGK8! z89Am YWv*3t nGK8! z89Am YWpazadNuKNamp。ksv*3t nGK8!z89Am YW pazadNuKNamp。 ksv*3t nGK8! z89Am v^ $UE9wEwZQcUE%amp。 MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn% Mz849Gx^Gjqv^$UE9wEwZQcUE% amp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK! zn%Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。 MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn% Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。 ksv*3t nGK8! z89Am YWpaz adNuKNamp。 ksv*3t nGK8! z8vGt YM*Jgamp。 ksv*3tnGK8! z89Am UE9aQGn8xp$Ramp。 UE9aQGn8xp$Ramp。 M 和 T 是傳送天線的數(shù)量和傳送 L 輸入信號(hào)的時(shí)間標(biāo)志。同時(shí)，使用 Turbo 碼通過(guò)利用其良好的性能來(lái)改進(jìn)所假設(shè)的空時(shí)分組碼的抵抗衰落信道的突發(fā)的錯(cuò)誤的能力。他們的代碼。 為此 ,H. Jafarkhan 等和 Tirkkonen 等分別提出了兩種基于全速率的準(zhǔn)正交空時(shí)分組編 碼 , 即 Jafarkhani 碼和 TBH 碼。 外文資料 （一） On Orthogonal SpaceTime Block Codes for MIMOOFDM Systems Spacetime code in mobile munication system, and orthogonal desing in multiple antennas seme are dicsussed. By the methods, data is encoded using a space time block code and is split into several streams which are simultaneously transmitted by antennas. So a maximum likelihood decoding algorithm can be used at the receiver to achieve the maximum diversity order Introduction Most work on wireless munications had focused on having an antenna array at only one end of the wireless link — usually at the receiver. Seminal papers by Gerard J. Foschini and Michael J. Gans[1], Foschini[2] and Emre Telatar[3] enlarged the scope of wireless munication possibilities by showing that for the highlyscattering environment substantial capacity gains are enabled when antenna arrays are used at both ends of a link. An alternative approach to utilizing multiple antennas relies on having multiple transmit antennas and only optionally mul tiple receive antennas. Proposed by Vahid Tarokh, Nambi Seshadri and Robert Calderbank, these space–time codes (STCs) achieve significant error rate improvements over singleantenna systems. Their original scheme was based on trellis codes but the simpler block codes were utilized by Siavash Alamouti,and later Vahid Tarokh, Hamid Jafarkhani and Robert Calderbank to develop space–time blockcodes (STBCs) [4]. STC involves the transmission of multiple redundant copies of data to pensate for fading and thermal noise in the hope that some of them may arrive at the receiver in a better state than others. In the case of STBC in particular, the data stream to be transmitted is encoded in blocks, which are distributed among spaced antennas and across time. While it is necessary to have multiple transmit antennas, it is not necessary to have multiple receive antennas, although to do so improves performance. This process of receiving diverse copies of the data is known as diversity reception and is what was largely studied until Foschini39。 JiaHou 等在Jafarkhani 碼和 TBH 碼的基礎(chǔ)上 , 討論了變形 Jafarkhani 碼和變形 TBH 碼 , 并提出了 2種新的準(zhǔn)正交編碼。一直以來(lái)的改進(jìn)。與全樣性的多天線空時(shí)分組碼相比，所假設(shè)的碼能夠有單位速率以及部分的多樣性，并且它在相同的系統(tǒng)吞吐量時(shí)計(jì)算復(fù)雜性要小的多。 2 單位速率空時(shí)分組碼 在這一部分，我們考慮一個(gè) 由三根天線所組成的通信系統(tǒng)， 1接收到在平穩(wěn)衰落環(huán)境和時(shí)分雙工模型的天線信號(hào)。849Gx^Gj qv^$UE9wEwZQcUE%amp。 849Gx^Gj qv^$UE9wEwZQcUE%amp。 6a*CZ7H$dq8Kqqf HVZFedswSyXTyamp。MuWFA5ux^Gjqv^$UE9wEwZQcUE% amp。 qYpEh5pDx2zVkumamp。 qYpEh5pDx2zVkumamp。qYpEh5pDx2zVkumamp。 qYpEh5pDx2zVkumamp。MuWFA5ux^Gj qv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK! zn%Mz849Gx^Gj qv^$U*3t nGK8! z89Am YWpazadNuKNamp。ksv*3t nGK8!z89Am YWv*3t nGK8! z89Am YWpazadNuKNamp。 gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。 qYpEh5pDx2zVkumamp。 MuWFA5ux^Gj qv^$UE9wEwZQcUE% amp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv^$U*3t nGK8! z89Am YWpaza dNuKNamp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv^$U*3t nGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。gTXRm 6X4NGpP$vSTTamp。qYpEh5pDx2zVkumamp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv3t nGK8! z 89Am YWpazadNuKNamp。MuWFA5ux^Gj qv^$UE9wEwZQcUE% amp。 MuWFA5uxY7JnD6YWRrWwc^vR9amp。 gTXRm 6X4NGpP$vSTTamp。 gTXRm6X4NGpP$vSTTamp。 gTXRm6X4NGpP$vSTTamp。 ksv*3tnGK8! z89Am YWpazadNuKNamp。MuWFA5ux^Gjqv^$UE9wEwZQcUE% amp。 M uWFA5ux^Gj qv^$UE9wEwZQcUE%amp。 qYpEh5pDx2zVkumamp。gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。gTXRm 6X4NGpP$vSTTamp。 ksv*3t nGK8! z89Am YWpazadNuGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 gTXRm 6X4NGpP$vSTTamp。gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。 QA9wkxFyeQ^! djsXuyUP2kNXpRWXm Aamp。假設(shè) L,M,T 都是正整數(shù)，一個(gè)復(fù)正交空時(shí)編碼被定義為一個(gè)MT? 的 傳輸矩陣 G,對(duì)于這個(gè)矩陣中的每一個(gè)詞條都是輸入為 1 2 3, , ,... ls s s s 的 L的復(fù)雜線性組合 ,并且它們的共軛 * * * *1 2 3, , ,... ls s s s ,而且它滿足下面的復(fù)正交條件 21 ||LHL M MLG G S I ????? ????? 在此 ,上標(biāo) H 代表的是厄米的結(jié)合 ,而 I 則是 MT? 的單位矩陣。在本文中，假設(shè)對(duì)于多個(gè)天線的時(shí)分雙工模型有一個(gè)單位速率的復(fù)正交空時(shí)編碼。他們也證明了不能超過(guò) 2 個(gè)發(fā)射天線可以達(dá)到的目 標(biāo)。由于正交空時(shí)分組編碼發(fā)射矩陣各行之間的正交性 , 可以獲得滿分集增益 , 但是當(dāng)發(fā)射天線數(shù)大于 2時(shí) , 利用復(fù)正交設(shè)計(jì)得到的正交空時(shí)分組編碼不能達(dá)到最大傳輸速率 。s 1998 paper. An STBC is usually represented by a matrix. Each row represents a time slot and each column represents one antenna39。在既定的情況下 ,在特定的數(shù)據(jù)流傳輸編碼在 blocks塊 , 間隔 ,將分布在天線和跨越時(shí)空。然而 ,作為明確的例子 ,為什么不能到達(dá)率 1,其他什么必須解決的問(wèn)題有如何用空時(shí)碼接收更好的信號(hào)。更好的是，因其部分多樣性， Turbo 碼的應(yīng)用能有效的彌補(bǔ)性能損失。包含 Turbo 碼的這個(gè)通信系統(tǒng)的傳送和接收結(jié)構(gòu)分別在圖 1和圖 2中給出。 qYpEh5pDx2zVkumamp。 qYpEh5pDx2zVkumamp。 QA9wkxFyeQ^! dj sXuyUP2kNXpRW Xm Aamp。qYpEh5pDx2zVkumamp。 gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。 qYpEh5pDx2zVkumamp。 MuWFA5uxY7JnD6YWRrWwc^ vR9CpbK! zn% Mz849Gx^Gjqv^$UE9wEwZQcUE% amp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK! zn%Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。 ksv*3tnGK8! z89Am YWpazadNuKNamp。ksv*3t nGK8!z89Am YWpazadNuKNamp。 gTXRm6X4NGpP$vSTTamp。qYpEh5pDx2zVkumamp。 MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK! zn%Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK! zn%Mz84! z89Am v^$UE9wEwZQcUE%amp。 MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn% Mz849Gx^Gjqv^$UE9wEwZQcUE% amp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。