Simple upper bounds of signal to noise ratio improvement factor are derived for the suppression of a narrowband first-order autoregressive process and analytical conclusions corroborated by numerical examples.

研究了判決反饋濾波器在直擴(kuò)系統(tǒng)中估計和抑制窄帶干擾的性能97.riav，給出了判決反饋濾波器抑制一階自回歸干擾時信噪比提高因子的閉合表達(dá)式的上界美女a视频网站。

The traditional Givens rotation algorithm involves root computation that needs more hardware resources, a Givens rotation algorithm without root and division computation is presented. And, combined with special structure of input signal matrix, a interference suppression algorithm with low computation is proposed. The narrowband interferences are modeled as autoregressive process and digital signal.

傳統(tǒng)Givens旋轉(zhuǎn)算法涉及平方根運算，要消耗較多硬件資源或需要多次循環(huán)來實現(xiàn)国产综合91，為此人视频在线看免费，提出一種無平方根與除法運算的Givens旋轉(zhuǎn)算法，并結(jié)合信號輸入矩陣的特殊結(jié)構(gòu)国产无码色色AV，給出一種低復(fù)雜度的干擾抑制算法有AA级黄片会动图免费看，將窄帶干擾建模為自回歸過程以及數(shù)字窄帶信號。

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和貢獻(xiàn)如下：●提出了一種基于窄帶處理的FH信號盲檢測和參數(shù)盲估計的實現(xiàn)方法免费A级高清在线观看，即首先求出多路信號之間的互相關(guān)狂野欧美粗黑硬大，進(jìn)而得到互功率譜密度矩陣，然后通過對CSDM進(jìn)行對折處理來抑制噪聲九九玖玖、定頻信號及其他干擾的影響一级女家教，并將所有屬于FH信號的hop(每一跳的駐留時間在時頻圖上持續(xù)的線段)從CSDM中篩選出來，最后用陣列信號處理中的到達(dá)方向估計理論在頻域中估計出各個hop的方向參數(shù)无码国产在线呦呦，利用方位信息完成FH信號分離并得到FH信號的數(shù)目及其各自的參數(shù)集国产巨乳美女中文字幕毛片在线；●提出了一種確定FH信號檢測門限的策略，該策略不僅使得檢測門限能夠通過理論計算得到www.人人操人人操麻豆，而且還顯著地抑制了非跳頻信號的干擾国产一级午夜福利，從而能有效地檢測出FH信號；●提出了一種基于寬帶處理的短波FH信號盲檢測和參數(shù)盲估計的實現(xiàn)方法黄色入口，即首先利用寬帶空間譜測向技術(shù)得到接收信號的DOA丝袜人妻欧美，然后采用寬帶波束形成技術(shù)對特定方向進(jìn)行空間濾波，實現(xiàn)多個信號的分離女人张开腿男人猛桶视频，最后分別提出了兩種FH信號的盲檢測和參數(shù)盲估計方法丁香婷婷五月天综合，第一種方法適用于空間某個特定方向上存在著幾個駐留時間不同的恒跳速FH信號和其他干擾信號的混合信號，第二種方法適用于空間某個特定方向上僅含一個可變跳速的FH信號和噪聲的混合信號新黄页在线观看；●將空間插值的概念和寬帶波束形成技術(shù)結(jié)合起來毛片a片一级片，提出了一種基于頻域處理的寬帶恒定束寬的波束形成方法。

Despite the channel is not smoothly,but each sub channel is smoothly and the signal be transferred by narrowband in sub channel,which can avoid disturber between sigal wave.

本文的研究表明成人综合网在线播放网站，如果采用新的正交基來取代這些子載波色色五月天网站，可以在不加保護(hù)間隔的情況下減少ICI和ISI，從而改進(jìn)正交頻分復(fù)用技術(shù)的性能中文国产A片。

When the pump beams have either narrowband or broadband linewidth,it is found that the overall accuracy for the energy-level difference measurement is determined by the homogeneous linewidths of the optical transitions,and is independent of laser linewidth and Doppler broadening.

無論泵浦光束為窄帶線寬或?qū)拵Ь€寬一级毛片毛片毛片毛毛片，它對能級差測量的總體精度僅僅取決于光學(xué)躍遷的均勻增寬，而與激光線寬和多普勒增寬無關(guān)日本黄色官网精品在线。

Our study has the following findings: most of the network bandwidth is used by P2P software to transfer the files, approximately 34%. Among the P2P software, the largest service item is the eDonkey, approximately 24%. Most of the traffic in each group is used by only a few users. The behaviors of the broadband users are significantly different than the narrowband users. To download the files is the major purpose of the broadband users, but the narrowband users are used to get their Emails. The files with the video files extensions of dat色库视频导航、mpg国产不卡精品视频、avi and with image file extensions of iso、mdf97人人操人人弄、img are the primary file types transferred by campus users.

本研究發(fā)現(xiàn)：占用頻寬最大比例者為P2P軟體之檔案資料傳輸欧差超碰在线免费，約占總頻寬34%，其中最大項目為eDonkey鸥美多人××视频，占總頻寬使用量約24%淫荡视频网址；群組的流量，大部分是群組內(nèi)少數(shù)使用者所使用纯A级黄毛片一级；寬頻及窄頻使用者行為有顯著不同永久黄网站色视频免费观看w下载，其中，寬頻使用者是以下載檔案為主国产一级A片a爱视频，而窄頻使用者是以收信為主欧美一级人与嘼视频免费；在檔案的傳輸中，以副檔名為dat中文字幕第页日、mpg欧美精品AAAAAAAAA片、avi等影片檔及副檔名為iso、mdfwwwxxxx黄色、img等光碟映射檔為主要傳輸類別xxxx欧美图片。

In Speex narrowband mode,the input data are exactly 160 samples with each sample consisting of 16 bits.It can create corresponsive compressed data by set quality.

於Speex narrowband中，每160個且為16 bits的樣本中国产黄色无码，設(shè)定相對應(yīng)的品質(zhì)可以得到相對應(yīng)的壓縮大小

However, upon detection of an incumbent narrowband signal in the channel, the WRAN endpoint forms a frequency usage map for transmission to another WRAN endpoint, wherein the frequency usage map identifies one, or more, of the subcarrier sets that would interfere with the incumbent narrowband signal.

然而人人操人人色人人干人人舔，在檢測到信道中在用窄帶信號時，WRAN端點形成頻率使用映射一级A片黄片免费视频，用于向另一個WRAN端點傳輸美女黄毛A片免费观看，其中所述頻率使用映射識別一個或者多個與在所述用窄帶信號干擾的子載波組。

The communication technology used in GPS is a direct sequence spread spectrum structure. Using C/A Gold codes, it can cope with wideband noise (such as thermal noise and channel noise) or low power narrowband interference by its processing gain. But DS-SS can not reject high power narrowband interference completely. So we need an anti-jamming filter to reject the narrowband interference by using adaptive filters prior to dispreading.

它是利用直接展頻的一種架構(gòu)怡红院性爱网，因此国产爱福利一区，此系統(tǒng)能藉由C/A碼的展頻處理增益，來對付ㄧ些寬頻的干擾或是低能量的窄頻干擾手机在线一区二区三区免费视频视频，但是它無法應(yīng)付高能量的窄頻干擾国产精品看片，因此我們需要一個抗干擾濾波器在解展頻之前來先將干擾去除。

There are few equivalent circuit modeling methods for UWB antennas. This thesis compares the characteristic of some existing modeling methods and presents a general and precise modeling method for UWB antennas. Firstly, establish the narrowband model of the antenna, and compute the difference between input admittances of the antenna and its narrowband model. Secondly, implement rational approximation of the difference to build the macromodel, and convert it into SPICE equivalent circuits. Lastly, combine the narrowband model and the macromodel to form the ultimate equivalent circuit model of the antenna.

本論文針對目前UWB天線等效電路建模方法比較少的現(xiàn)狀国产精品免费一级高清不卡，結(jié)合現(xiàn)有的天線建模方法的一些特點美女黄色片在线免费观看，研究了一種系統(tǒng)通用、模型精度高的新建模方法：首先建立超寬帶天線的窄帶模型99riAV无码，計算天線及其窄帶模型導(dǎo)納的差值性欧美XXXX一XXXX极品；接著對差值進(jìn)行有理多項式擬合，得到相應(yīng)的宏模型97资源人人干，并轉(zhuǎn)化為SPICE等效電路黄色91在线国产；最后合并窄帶模型與宏模型電路全免费午夜一级毛片爽爽爽爽，得到天線等效電路模型。