無衰落傳播 的英文怎麼說
中文拼音 [wúshuāilàzhuànbō]
無衰落傳播
英文
fade free propagation- 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
- 衰 : 衰動詞（衰弱） decline; wane
- 落 : 落名詞[方言] （北方對蓮花落的俗稱） a kind of folk song
- 傳 : 傳名詞1 （解釋經文的著作） commentaries on classics 2 （傳記） biography 3 （敘述歷史故事的作品）...
- 播 : 播名詞（姓氏） a surname
- 衰落 : decline; be on the wane; go downhill; fading; decay; decaying; lapse; erode
- 傳播 : 1 （廣泛散布） disseminate; propagate; spread; （over）; diffuse; transmit; run 2 [物理學] propag...
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With the downlink simulation model constructed, performance of wideband cdma under different radio propagation environment and vehicular speed is simulated. based on system model of mc ds cdma under flat fading channel with relative shifts of spreading sequences within 1 chip and frequency selective fading channel with arbitrary relative chip shifts, performance of multicarrier cdma system with go sequences under different radio environment is investigated
基於多載波直接序列碼分多址在乎坦衰落通道中序列偏移小於1個碼片及在頻率選擇性衰落通道中偏移任意個碼片的系統模型，本文還分析了採用廣義正交序列的多載波碼分多址系統在不同無線傳播環境下的性能。Researches on the space - time code have been under the assumption of independent fading and perfect channel state information. but in a realistic system, the above assumption is very difficult to be acquired. based on this, the performance of space - time code under correlated rayleigh fading channel and rician fading channel is studied in thispaper
在實際的傳播環境中，不同天線上的信號的衰落在空間上存在相關性，研究了瑞利相關衰落通道的空間相關性對空時編碼性能的影響以及相關萊斯衰落通道下空時編碼系統的性能，以期推動空時編碼在無線通信系統中的實際應用。Much reference of the algorithms and models can be got from the performance results for the practical design and layout. system - level simulation of hsupa builds the integrated platform and key models to describe and simulate the common structure and features of the radio network, including cell layout, path gain, traffic model, power control, handover, etc., also the special ones of hsupa, including mac - es / e, node b controlled scheduling, harq, shorter tti, etc.
所謂hsupa系統級模擬就是要搭建系統級的模擬平臺，對無線網路的公共結構和特性（例如小區布局，傳播模型，衰落通道，天線模型，功率控制，切換， ue的分佈和移動，業務的建立終止和中斷等）和hsupa的專有結構和特性（ mac - es / e ， nodeb控制的調度， harq ，更短的tti ）進行描述和建模。
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