更迭鍵 的英文怎麼說
中文拼音 [gēngdiějiàn]
更迭鍵
英文
alternate bonds-
M there are considerable number of research concendng finie elemen method on contat problem and lot of techniques such as iteraion methd, mathematics propoming, penalty method, langrange multiplier and so on hav been developed, it is not easy to popularize the presemed methods to engineering. " field due to their complicate techniques. ms prompts the author to develop an wash that is simpler in techniques and can be @ plied to geotecilllital problems iv with less difficulty
雖然目前接觸問題有限元計算已有大量的研究成果，所提出的求解方法也很多，如直接迭代法、數學規劃法、罰函數、 langrange乘子法等，但其求解技巧普遍比較復雜而不易在工程領域推廣應用，在巖土工程中的應用則更少，因此，本文的主要工作是建立一種比較簡單、方便、能夠用於工程問題的接觸問題的計算方法，而其關鍵是相應的有限元計算公式的建立。Based on the simulation results, the key techniques for the design of turbo codes, including the choice of component codes, the design of interleaver, trellis termination schemes and puncturing methods, are discussed deeply. by measuring the statistical characteristic of extrinsic information from component decoders, new iterative stopping criteria and snr estimation updator are devised. also, it is used to implement synchronization of carrier phase
本文首先對turbo碼的基本編譯碼原理進行分析，在模擬結果的基礎上對turbo碼設計中的分量碼選擇、交織器設計、編碼器狀態歸零方案以及刪余方式等部分關鍵問題進行探討；通過考察外部信息的統計特性，設計了新的迭代停止準則和snr估計更新器，並利用外部信息實現串聯載波相位同步；最後對turbo均衡進行簡要分析。
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