diversity performance 中文意思是什麼

diversity performance 解釋
分集性能
  • diversity : n. 1. 不同，異樣，差異。2. 繁多，多種，多樣，駁雜，參差。
  • performance : n. 1. 執行，實行，履行；完成；實現；償還。2. 行為，動作，行動；工作。3. 性能；特性。4. 功績；成績。5. 演奏；彈奏；演出；（馴獸等的）表演；把戲。6. 【物理學】演績。
  1. The performance of a planar polarization diversity antenna on the handset with optimum combining and equal ratio combining is then studied

    用montecarlo模擬研究了採用最優合併和等比合併的手機上平面雙埠極化天線系統的分集性能。
  2. In chapter 4, a simulation approach is presented, which combines the outdoor radio propagation model, the eigen - driven patterns of handset diversity antenna with two feed ports and combining schemes of receiving signals, to investigate the performance of a dual antenna handset under co - channel interference ( cci ) and multi - path fading environment

    第四章首先用本徵激勵方向圖的概念來產生手機雙埠分集天線的接收信號矢量，然後將其與城市室外電波傳播模型、分集合併方式相結合，建立了分析在具有共道干擾和多徑衰落環境中手機雙天線系統的性能模型。
  3. It has been improved, and specially proposed : firstly, we has increased run speed and ensure the diversity of population is with constructing non - dominated set by throwing off the dominated solutions, expressing the interior relation of individuals each other by the crowding distance, and constructing new population. secondly, we have further improved its convergence performance by clustering in precondition of ensuring a better distribution of individuals

    該文以nsga -為基準，對演算法進行了改進，具體提出了：用排除法構造非支配集、用聚集距離刻畫個體間的內部關系以及構造新群體，來提高運行速度和保持群體的多樣性；用聚類演算法在保持原有特性的前提下，進一步改善收斂性能等。
  4. The analysis of the performance and its comparison to space time transmit diversity ( sttd ) are presented in this chapter. the link level simulations are performed. finally we discuss the effects of feedback delay and feedback error on the performance

    第五章首先介紹了閉環發送分集的原理；接著對其性能進行了仔細的分析，完成了鏈路級模擬，並與開環發送分集進行了對比；最後討論了反饋延遲、錯誤對性能的影響。
  5. Space - time codes can be divided into tree mainly parts : bell layered space - time architecture ( blast ), space - time trellis codes ( sttc ) and space - time block codes ( stbc ). in this paper, we mainly compare the performance of blast and stbc in many aspects, such as design criterion, transmission rate, diversity gain, diversity combining, bit error rate and channel capacity etc. in this paper, we first respectively analysed the instantaneous received symbol energy - to - noise ratio of v _ blast in the diversity combining methods of maximal ratio combining ( mrc ), equal gain combing ( egc ) and selective combing ( sc )

    Mimo技術核心是空時編碼（ stc ） 。空時編碼主要分為三種:分層空時碼（ blast ） 、空時格碼（ sttc ）和空時塊碼（ stbc ） 。本文主要對分層空時碼和空時塊碼這兩種編碼方式在設計準則、傳輸速率、分集增益、接收合併、比特差錯率和通道容量等方面進行了較為詳盡的研究。
  6. It has good computational cost because of avoiding any inverse operation and optimal ordering. it also utilizes double - directional detection and diversity combine technology to migrate the error propagation, and then improve the ber performance

    它不需要進行任何形式的矩陣求逆運算和最優信號排序操作，因此具有良好的演算法復雜度，同時它利用雙向檢測策略與分集合併技術來抑制誤差傳遞，提高了演算法的檢測性能。
  7. Although china realized diversity of financial capital structure and growth in numbers, but the financial growth must still be passively applied to the performance of economic marketing

    雖然中國實現了金融資產結構的多樣化和數量增長，但金融增長是被動地適應經濟市場化的結果。
  8. On the performance of multiuser diversity in multicarrier systems with delay - constraints

    時延約束多載波系統中多用戶分集性能
  9. Combined with the data - selected schemes proposed, the computational complexity of this method can be lowered. the performance of the presented rls method is analyzed by simulations, and it is shown that this method is interesting for application. 4 time - selective channel signal model based on multipath - doppler diversity representation is given in multi - path fast fading channel, and rls space - time receiver algorithm based on time - varied constraint condition is presented and the computational complexity of this method is analyzed

    4 、針對多徑快衰落通道下的ds - cdma系統，給出了基於多徑-多譜勒觀點描述的1百安電弓卜科東兔j憶學協士學位論文時間選擇性通道的信號模型，提出了基於變約束條件下的遞歸最小二乘空時接收機演算法並分析演算法的運算量，最後通過模擬分析了所提出的方法的性能。
  10. The backward scattering field of extended target is approximated as the synthesis of many strong scatter centers on target, and geometric optical method is used in establishing deterministic model of a aircraft in the paper, the model is used to evaluate the performance of frequency diversity in suppressing glint at last

    本文將復雜目標後向散射回波近似為目標上若干強散射中心回波的合成，結合幾何光學法得到了某種飛機目標的確定性模型，並用該模型評定頻率分集對角閃爍抑制的改善性能。
  11. This method can convert the dispersive channels into independent flat fading subchannels, so that it increase the diversity gain of the receiver and outperform that of the original paper as for the ber performance and maximum mutual information while maintaining all the advantages of it. in chapter 4, the models of the tv dispersive channels are reviewed in signal processing perspective

    在第四章中，作者對時變色散通道的信號處理模型進行了研究，提出了離散正則模型的概念，對其進行了詳細的討論，並利用多采樣率理論將該模型推廣到一般的時變色散通道。
  12. Performance of wireless multimedia ds - cdma diversity receiver in fading channel

    無線多媒體直擴分集系統在衰落通道下的性能研究
  13. And we found three kinds of factors which influence team performance : ( 1 ) team structure, including team background experience, team member diversity ; ( 2 ) organization environment, including management environment, resource environment and culture environment ; ( 3 ) team process, including goal setting, communication and cooperation, team creativity, task orientation. through the investigation we found that team process is the most important factor

    影響團隊績效的因素可以分為三種: （ 1 ）團隊構成特徵，其中包括團隊背景經驗、團隊成員的多樣性等; （ 2 ）組織支持特徵，其中包括組織的管理支持、組織的資源支持和組織的文化支持等; （ 3 ）團隊過程特徵，其中包括宗旨目標、溝通與合作、團隊的創造性、任務導向等。
  14. Analysis approach of ber performance for equal - gain diversity

    等增益分集系統誤碼率性能分析
  15. In chapter 5, a simulation model to predict the diversity performance for the two - port antenna system with a given correlation coefficient has been developed

    第五章對信號非零相關的雙埠天線的分集性能進行了模擬研究。
  16. In detail, they are bit - interleaved coded modulation ( with iterative decoding ), low - density parity - check codes and stf technology. by the performance analysis of bicm ( - id ), which can make code and modulation optimal separately, and achieve maximum possible coding diversity as well as modulation gain, guidelines for its design and an easy algorithm for siso are proposed. design of capacity - approaching of ldpc codes and efficient encoding of them as well as several kinds of its decoding algorithms are investigated

    具體的講，就是討論了基於比特交織的編碼調制技術，並給出了映射方式的設計準則以及核心模塊siso的一種簡單的f - map演算法；研究了編碼最小漢明距隨碼長線性增加的ldpc碼的幾個方面的問題，包括接近香農限碼子集的度分佈對的設計、有效編碼器的實現和各種譯碼演算法的優缺點，並對基於ldpc碼的bicm應用於ofdm傳輸系統中的性能進行了模擬。
  17. After analyzing the performance of the coherent tree - structured optimal joint detection ( tsojd ) for qpsk signals and deriving a non - coherent multi - user weight / phase estimator, the dissertation proposes a low complexity non - coherent multi - user weight / phase optimal joint detection algorithm. besides, the dissertation proposes a partial coherent multi - user / iv weight / phase optimal joint detection algorithm and some useful conclusions are obtained in comparison experiments. 4. in the research on the diversity techniques for fast fading multi - path channels, the dissertation proposes a time - scale rake receiver, and analyzes its performance with the conception of auto - wavelet - transform ( awt ) and time - - scale resolution

    提出了過飽和低復雜度qpsk信號的樹型最佳聯合檢測演算法，並分析了相應最佳接收機的性能及相位偏差對性能的影響等問題；考慮了載波相位和多用戶信碼的聯合檢測問題，通過理論推導給出了過飽和多址系統中多用戶信碼/相位聯合估計子，提出了低復雜度非相干多用戶信碼/相位最佳聯合檢測演算法，並分析了此非相干最佳接收機的誤碼性能及相位提取誤差等有關問題；提出了部分相干多用戶信碼/相位最佳聯合檢測演算法，通過計算機模擬分析了該接收機的誤碼性能及相位提取誤差等有關問題，並與相干、非相干解調兩種情況作了比較，得出了一些有益的結論。
  18. But due to the complexity of factors influencing fatigue performance, such as wave load and pressure from cargo, the combination of different stress components, stress concentration of local structure details, mean stress and the corrosive environments, etc, there are different specifications with varying classification societies, so it will lead to the diversity of results from different fatigue assessment methods

    但是，由於影響結構疲勞性能的因素十分復雜，如波浪載荷和局部的貨物壓力，各種應力成分的組合，結構的局部細節應力集中，平均應力的影響，結構分身所處的腐蝕環境等等，所以各個船級社有關的規定也不一樣，這樣必然造成各個評估方法之間的差異。
  19. In this paper, bit - error rate performance analyses are presented for coded and un - coded frequency hopping m - ary frequency - shift keyed systems under the condition of additive white gaussian noise ( awgn ) and partial band noise jamming and multitone jamming. the use of error - correct codes provide a way to improve the performance of frequency hopping system, particularly the use of reed - solomon code in a fh system under the condition of partial band noise jamming can greatly improve the performance of system. so we provide the way of coding and decoding of rs code in c language. in the end, we offer the simulation of the performance of time diversity fh / 2fsk system over partial band jamming noise channels

    第一章為緒論，敘述跳頻通信的發展趨勢，以及基本概念，第二章及第三章介紹提高抗部分頻帶干擾的前向糾錯碼reed - solomon碼的原理和實現方法。第四章研究跳頻通信系統在各種干擾條件下的性能。最後在第五章以fh mfsk系統為例，探討在部分頻帶干擾下的系統性能，並進行計算機模擬，模擬結果表明採用分集技術和各種編碼技術對于系統的性能改善具有明顯的效果。
  20. Space or multi - anntenna, diversity techniques are particularly attractive as they can be readily combined with other forms of diversity, e. g., time and frequency diversity, and still offer dramatic performance gains when other forms of diversity are unavailable

    空間或多天線分集技術由於可以與其它如時間分集，頻率分集技術相結合，並在其基礎上提供很大的性能增益，而成為一種很有吸引力的分集技術。
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