空時格形碼 的英文怎麼說
中文拼音 [kōngshígéxíngmǎ]
空時格形碼
英文
sttc-
But for the same reason, it have n ' t the same diversity feature as space - time block code, as well as it have n ' t the same error correction capability as convolutional code or trellis code modulation
由於空時格碼兼顧了分集和通道編碼，導致其分集特性不如空時分組碼，糾錯能力不如卷積碼和格形編碼調制。When the number of the antennae is not changed, the complexity of sttc decoding would increase on index with the acceleration of the transmission rate
空時格形碼在天線數目固定時，譯碼復雜度隨發射速率的增大呈指數增加。However, stbc overcomes the limitation of sttc that its decoding is very complexly. it makes use of ml decoding arithmetic which possesses orthogonal designs
空時分組碼則克服了空時格形碼譯碼過于復雜的缺陷，它利用具有正交設計的最大似然譯碼演算法實現。The assumption that the channel is known is questionable in a rapidly changing mobile environment, or when multiple transmitter antennas are employed. unitary space - time codes and differential unitary space - time codes do n ' t need any channel information. we discuss the unitary space - time codes briefly and study the details of the dustc, including the fundamental differential transmission and receiver equation, and parameters searching algorithm. the parameters searching and simulations results is proposed
酉空時編碼及酉差分空時編碼（ dustc ）都不需要通道信息，著重研究了酉差分空時編碼技術，簡要說明了酉空時編碼的信號形式及星座設計方法;分析了dustc的發送和接收公式，分析了dustc的嚴格pep和sep的聯合界，給出了當snr值在不同的范圍時， dustc星座參數的選取準則，並進行了rayleigh衰落通道的模擬。分享友人