orthogonal antennas 中文意思是什麼
orthogonal antennas
解釋
正交天線- orthogonal : adj. 1. 直角的，互相垂直的；正交的；直交的。2. （統計數字）互不相關的。
- antennas : 天線（18類）
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Abstract : by comparing the channel capacities hetwem orthogonal space - time block coding and multi - antenna array system over rayleigh fading channel, some capacity loss for orthogonal space - time block coding is obtained, which is a function of the code rate, the rank of channel matrix and the number of transmitter and receive antennas, although the system of orthogonal space - time block codes is simple and easy to implemented. if is also shown that there is no capacity loss only if both the code rate and the channel matrix rank are all one
文摘:在研究瑞利衰落條件下正交空時分組編碼通道容量的基礎上，將其與多發送多接收天線系統的通道容量進行了比較.比較結果表明，正交空時分組碼雖編碼簡單，易於實現，但在通道容量方面存在較大的損失，損失的程度與編碼碼率、通道矩陣的秩及收發天線數等因素有關.進一步研究表明只有當編碼碼率和通道矩陣的秩都為1時，才沒有通道容量的損失 -
A subspace - based blind channel estimator has been developed for space time coding orthogonal frequency division multiplexing ( stc - ofdm ) system with two transmit antennas and two receive antennas
摘要針對使用2個發射天線和2個接收天線並且採用循環前綴的空時編碼正交頻分復用系統（ stc - ofdm ） ，提出了一種通道盲估計演算法，並給出通道可被辨識的條件。 -
Future mobile communication will be wide - band multimedia communication. the adoptive technologies include wideband cdma, software radio, intelligent antennas, ofdm ( orthogonal frequency division multiplexing ) and digital processing device. ofdm and software radio are both the charming technology for future mobile communication
移動通信的發展趨勢是寬帶多媒體通信，所採用的技術包括寬帶cdma 、軟體無線電（ softwareradio ） 、智能天線（ intelligentantennas ） 、正交頻分復用（ ofdm ）和數字處理設備。 -
Recently, multiple input multiple output ( mimo ) system which originates from the employment of multiple antennas at transmitter and receiver has many advantages such as large system capacity, high spectral efficiency. on the other hand, orthogonal frequency division multiplexing ( ofdm ) which bases on the orthogonal transmission of sub - carriers also has some obvious merits such as strong anti - multipath ability, high spectral efficiency. the combination of the two techniques mimo - ofdm, has become a hotspot recently and regarded as promising technique for future next - generation mobile communication systems
近來，在無線通信系統中的收發兩端同時使用多根天線的多入多出（ mimo ， multiple - input - multiple - output ）通信結構，具有系統容量大、頻譜效率高等優點;基於正交的多路子載波并行傳輸的正交頻分復用（ ofdm ， orthogonalfrequencydivisionmultiplexing ）技術，具有抗多徑能力強、頻譜效率高等優點，二者的結合，即mimo - ofdm技術，被認為是構建下一代移動通信系統的框架技術。
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