4 . the wideband active signal detector is presented and simulation is given . the result proves this detector is efficient , and that non - rectangle enveloped hfm signal is the optimal detection signal 給出了寬帶主動信號檢測器的形式,并進(jìn)行了仿真研究,證明寬帶檢測器的有效性,同時(shí)驗(yàn)證了非矩形包絡(luò)雙曲調(diào)頻信號為最佳檢測信號。
These light sources have promising applications and potential market demands for the high - density storage of opto - information , high - speed laser print , high - brightness and dynamic display in all colors , solid light sources , signal detectors and communication 這類光源在高密度光信息存儲、高速激光打印、全色動態(tài)高亮度光顯示、固體照明光源、高亮度信號探測、通訊等方面有著廣闊的應(yīng)用前景和巨大的市場潛力。
Based on the theory and knowledge , the paper proposes and discusses several robust detectors in detail , such as optimal periodical signal detectors which exploits the prior knowledge that the chi _ square distribution hypothesis test has certain robustness , detectors based on over _ sampled gabor representation for transient signals detection which takes the numerical computational advantage of robustness brought by over _ sampling , and the detector using computer _ intensive method " bootstrap " 在此基礎(chǔ)上,詳細(xì)討論幾種具有一定robustness的檢測器,即,基于具有robustness的卡平方假設(shè)檢驗(yàn)的周期信號檢測方法、利用過采樣的gabor表示的暫態(tài)信號檢測方法以及基于計(jì)算機(jī)強(qiáng)大計(jì)算功能的統(tǒng)計(jì)學(xué)方法bootstrap技術(shù)。
In the fourth chapter , we presented the mmse soft interference cancellation detector as the signal detector , and proposed an effective transmit power allocation scheme to improve the performance of mimo - ofdm system . if ldpc channel coding is applied , we can find the performance can be improved about 1db when ber is 10 - 6 通過采用預(yù)編碼的技術(shù)能夠極大地簡化接收機(jī)的復(fù)雜度,因此在第五章中首先介紹了預(yù)編碼技術(shù)在無線多用戶mimo系統(tǒng)中的應(yīng)用,并著重討論了當(dāng)前引起廣泛關(guān)注的thp預(yù)編碼技術(shù)。