To signaling with no constant modulus ( such as 16qam ) , the switch algorithm is able to achieve less residual mean square error than that of cma 該切換算法,對于非常數(shù)模信號(如16qam等) ,可以獲得比常數(shù)模算法更小的剩余均方誤差。
Furthermore , satisfactory output signal - to - interference - and - noise - ratio ( sink ) is achieved . 3 when there exits several constant modulus signals , the cma could not adaptively distinguished different users 3當(dāng)多個恒模用戶同時存在時,恒模算法不能自適應(yīng)地辨別出不同的用戶。
Second , both the optimized beamforrnkig for antenna array and constant module algorithm are explored . we deeply study the performance of adaptive array under wireless multi - path environment 其次,分析了天線陣列最優(yōu)波束形成技術(shù)和恒模算法,深入研究了無線多徑環(huán)境下自適應(yīng)陣列的性能。
The mathematics " model of bussgang be for uwac is discussed . and in our research , the constant modulus algorithm ( cma ) is emphasized , which is a special example of the bussgang type ?給出了bussgang類水聲信道盲均衡算法的數(shù)學(xué)模型,重點分析了bussgang算法的一個特例? ?常數(shù)模算法的性能。
A kind of switch algorithm from cma to decision directed ( dd ) algorithm is studied , and the selecting method of the decision circle , according to signal - to - noise ratio ( snr ) , is presented 從信噪比的角度,研究了從常數(shù)模算法向判決導(dǎo)引算法的切換算法,提出了一種切換判決圓半徑的選取方法。
This algorithm is based on constant module algorithm ( cma ) . the computer simulation results indicate that this algorithm have several advantages such as fast convergence , robustness and so on 該算法基于恒模算法( cma ) ,計算機仿真結(jié)果顯示該算法收斂快速,性能穩(wěn)定,能準(zhǔn)確地完成多用戶的分離。
Analysis and simulation results show that the new algorithm provides faster convergence at early stages of iteration and ensures less final misadjustment compared with the cma 理論分析和仿真實驗均表明該算法與恒模算法相比,在收斂過程中加快了收斂速度,收數(shù)后又能減小對均衡器參數(shù)的誤調(diào),具有更小的穩(wěn)態(tài)剩余誤差。
In order to improving modeling efficiency and model fidelity , the author studies the modeling methods and improving measure on constructing tin considering limitation of terrain character 圍繞提高建模算法的效率和改進模型表示地形的逼真度與精度等問題,研究了顧及地形特征約束條件下不規(guī)則三角網(wǎng)tin的建模方法和改進措施。
In the thesis , three kinds of blind beamforming algorithms were introduced , which are the cumulant - bascd blind beamforming , the array structure - based blind beamforming , and the constant modulus algorithm 論文中首先詳細(xì)介紹了三類盲波束形成算法:基于累積量的盲波束形成算法、基于基陣結(jié)構(gòu)的盲波束形成算法和常模算法。
Finally , it is worth pointing out that our emphasis was only laid on the cma in this dissertation , hi fact , the idea of the above 3 , 4 and 5 could also be used in other beamforming algorithms 值得一提的是,本文僅僅是圍繞著恒模算法開展了一些工作,事實上,上述3 , 4 , 5三個方面的算法思想完全可以應(yīng)用于其它的盲波束形成算法。