調制誤碼率 的英文怎麼說
中文拼音 [diàozhìwùmǎlǜ]
調制誤碼率
英文
mer- 調 : Ⅰ動詞1 (配合得均勻合適) harmonize; suit well; fit in perfectly 2 (使配合得均勻合適) mix; adju...
- 制 : Ⅰ動詞1 (製造) make; manufacture 2 (擬訂; 規定) draw up; establish 3 (用強力約束; 限定; 管束...
- 誤 : Ⅰ名詞(錯誤) mistake; error Ⅱ動詞1 (弄錯) mistake; misunderstand 2 (耽誤) miss 3 (使受損害...
- 碼 : Ⅰ名詞(表示數目的符號或用具) a sign or object indicating number; code Ⅱ量詞1 (指一件事或一類的...
- 率 : 率名詞(比值) rate; ratio; proportion
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On the base of researching the theory of the scheme and analyzing the signal feature, it is obtained that the existence manners and character of distance information in the differential frequency signal. at the same time, a new conclusion is gained that the technology of frequency agility can decrease the constant error of system. it is also to say that frequency agility and frequency modulation fixed - distance fuze has the similar feature to random period frequency modulation fixed - distance fuze. according to the theory of address coding in the hopping - frequency communication, the paper presents the principle of selecting the frequency agility sequence which fit to the radio fuze and constructs the frequency agility sequence family based on the rs codes
在深入研究方案原理和分析信號特徵的基礎上,獲得了該體制引信差頻信號中,距離信息的存在形式和特點,得出了頻率捷變技術的引入降低了系統定距固定誤差這一新的結論,即頻率捷變調頻定距引信在定距性能上具有類似隨機周期調頻定距的特徵。本文引入跳頻通信地址編碼理論,結合無線電引信的具體特徵,提出了適用於無線電引信的頻率捷變序列的選擇原則,並構造了基於rs碼的寬間隔頻率捷變序列族。With the established rf front - end system simulation platform, adding the digital modulated baseband signal, this paper simulated the multifold digital modulated signal ’ s transmission, such as 2ask, qpsk, and 16qam. then researches of power compression and phase noise of local oscillation influence the bit error ratio for different modulated system. the designing is satisfied multifold functions request with the high - powered and integrated broadband rf front - end
隨后在建立的寬帶射頻前端通用模擬平臺上,加入基帶數字調制信號,對多種數字調制格式的信號在該通用平臺上的傳輸作了研究,模擬了2ask 、 qpsk和16qam等調制格式信號的發射與接收,研究了功率壓縮和本振相位噪聲對不同調制的誤碼率影響,實現了滿足多種功能要求的寬帶高性能綜合射頻前端的設計。In this thesis, firstly, we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ), and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage
我們對兩種正交調制方式( 16qam和4 - qpsk )進行了模擬工作並給出了模擬結果,同時討論了碼元同步定時誤差對鎖相環路工作的影響並根據流星通信中使用變速率傳輸時鎖相環路的載波同步性能進行了測試;然後在基於軟體無線電思想的數字處理平臺(該數字處理平臺實現了中頻數字化)上用dsp軟體完成了載波的相位跟蹤。In order to combine the study of the ds - ss communication system ’ s availably jamming, the whole ds - ss communication system is modeled and simulated, including the modulation of the ds - ss signal, channel transmission, synchronal demodulation of signal and statistic of the bit error rate ( ber )
為結合直擴通信系統的有效干擾研究工作,建立了直擴系統從信號的調制產生,通道傳輸、信號同步解擴解調和誤碼率統計的全過程模擬系統。In the last, test and optimization of dvb - c modulator system are addressed. methods of test and some items which should be paid attention of digital carrier level and rate of carrier to noise 、 relationship between ber and c / n 、 mer ( modulator error rate ) are given, some test results got by analyzer are all up to dvb - c test standard
給出了數字載波電平與載噪比( c / n ) 、誤碼率( ber )與載噪比( c / n )關系、調制誤碼率( mer )測試的方法與測試注意事項,通過分析儀等分析得到結果包括列表和圖示,達到了dvb - c規定的各項指標。By theory and practice simulation, the several types of constant envelope modulation techniques are analyzed and compared, including theirs modulation principle, phase path, the modulated wave envelope, power spectrums, error bit rate and the influence of its power spectrums of the band - limited and non - linear, etc. especially we have researched the ijf - oqpsk modulation technique, and the performance of its inter - symbol interference and time jitter free, and its strongly resisting of spectral spreading
結合理論和實驗模擬結果,分析討論了衛星通信中的各種恆包絡調制技術,對它們的調制原理,相位路徑,已調波包絡,功率譜密度,誤碼性能,以及帶限非線性通道對其功率譜的影響等方面都作了研究和比較。特別研究了ijf ? oqpsk在消除碼間干擾和定時抖動方面的性能及其優良的旁瓣特性和抑制頻譜擴展特性。The technology of trellis coded modulation ( tcm ) and viterbi decoding which could achieve high transmitting rate at a low bit ' error rate are demonstrated in detail. and then the design and achievement of itu - t v. 32 modem that based on one - dimensional tcm are expatiated. the paper also discusses the multi - dimensional tcm the itu - t v. 34 modem that based on it and tcm ' s application in the carrier communication
文中深入研究了可保證一定誤碼率的情況下能實現較高傳輸速率的網格編碼調制( tcm )技術和維特比譯碼技術,闡述了基於單維網格編碼調制的itu - tv . 32modem的設計和實現,討論了多維網格編碼調制技術和基於其的itu - tv . 34modem ,並對網格編碼調制在載波通信中的應用作了簡單介紹。According to the information that reflected the condition of channel, this thesis classified acm into heuristic acm and snr - estimation acm. the system that using the first one of acm decide the scheme of modulation and coding according to the frame error ratio that reflected indirectly the condition of channel, while it using the another of acm decide the scheme according to the snr estimation
根據反映通道狀態的信息不同,本文將自適應編碼調制技術分為基於探索的自適應編碼調制技術和基於通道信噪比預測的自適應編碼調制技術,前者根據間接反映通道條件的誤幀率和重傳次數信息來決定編碼調制方式,而後者根據通道信噪比預測的結果調節編碼調制方案。For implement of wide band modulation, multi - carries and elimination of adjacent channel interference to satisfy ber requirement in wcdma system, which is most popular in 3g technology, the linearity requirement of the base station power amplifier becomes tighter
以wcdma為代表的第三代移動通信技術,為實現寬帶調制、多載波應用,同時減小鄰通道干擾以滿足通信系統的誤碼率要求,對基站發射機功放的線性指標要求苛刻。In addition, this paper discusses the application of the parameter - induced stochastic resonance in the m - ary pam signal transmission, and explains the mechanism to stochastic resonance in a new view. we found that the single well is able to distinguish different signal levels, based on which the theory for m - ary pam signal transmission via parameter - induced stochastic resonance was briefly developed. the error code rate of m - ary pam signal was obtained
此外,本文還初步探討了參數誘導的隨機共振在多進制數字調制信號傳輸中的應用,從不同的觀點解釋隨機共振形成的機理,充分認識到非線性系統單勢井的信號處理能力,並給出多進制信號誤碼率的理論公式,模擬實驗表明這個研究方向具有很好的研究前景。Considering the bandwidth efficiency, the error rate performance and the complexity for realization together, we construct a digital transmission system with single - carrier modulation technique using the optimum premodulation filter. then the system parameters and performance indexes are prensent
綜合考慮帶寬效率、誤碼性能和實現復雜程度以後,構建出基於單載波調制技術的無線數字傳輸系統,並給出系統參數和性能指標。How to choose the modulation parameter is the main concern of chap 4. supposing that channel estimation is complete, a closed form relation between modulation switching levels and target ber is first derived
首先在通道估計完全正確的假設下,推導出了調制方式切換門限與目標誤碼率在即時誤碼率及平均誤碼率約束下的關系表達式。We discussed detailedly the application of parameter - induced stochastic resonance in binary baseband pulse amplitude modulated ( pam ) signal transmission. the system ' s measurements : bit error rate and channel capacity were deduced. the numerical simulation demonstrated our theoretical analyses
我們著重討論了參數誘導的隨機共振在二進制基帶脈沖幅值調制( pam )信號傳輸中的應用,詳細推導出了衡量系統傳輸性能的誤碼率和通道容量公式,並利用模擬模型進行了數值模擬,理論分析和模擬結果非常符合。Based on these advantages we analyze the performance of constant - power variable - rate m - qam schemes for spectrally efficient data transmission over nmf channels. by introducing the adaptive modulation approach, we gain two things : 1 ) the error rate is kept at a constant level. 2 ) the achievable spectral efficiency comes within 5 db of the shannon capacity limit. at the last chapter, the presentation of a single base station and a single mobile scenario proved the feasibility of adaptive schemes
然後作者的精力轉入通道的自適應方案的研究中,首先通過研究發現nakagami衰落因子的適當調整可以近似於常見的瑞利衰落和萊斯衰落,接著研究在無線通道中採用三種不同自適應方案時的通道容量,研究表明速率的調整是增加通道容量的關鍵,在此基礎上,著重研究了離散變速率qam的情況,表明這種調制方案無論在頻帶利用率還是在系統平均誤碼率比其它情況提高很多。In the code division multiple access ( cdma ) system, the multiple access interference ( mai ) mitigation capability as well as system capacity are determined, to a great extent, by the correlation properties of spreading sequences ; while adaptive modulation and coding ( amc ) with high spectral efficiency is the key technique to obtain high speed and low symbol error rate ( ser ) performance in mobile data transmission
在碼分多址( cdma )系統中,擴頻序列的特性在很大程度上決定了抗多址干擾( mai )能力和系統容量,而高頻譜效率的自適應調制編碼( amc )技術則是獲得高速率和低誤碼率( ser )移動數據傳輸性能的關鍵因素。A group of orthogonal frequency carriers are used in ofdm system to improve the using rate of spectrum. if the orthogonal character can be held and ignore the inter - channel interference ( ici ), the symbol error character of ofdm depend on the modulate of source codes. this dissertation propose the theoretic formula of ofdm - qam and ofdm - psk in this precondition
為了提高頻譜利用率, ofdm系統使用了一組正交的子載波來傳輸信號,若能保證各子載波間的正交性不被破壞、不考慮通道間干擾( ici ) ,則ofdm系統的誤碼性能由信元調制方案的誤碼性能決定,文中推導了該情況下ofdm - qam和ofdm - psk的理論誤碼率公式。Cvsd ( continuous variable slope delta modulation ) voice coding enables operation at high bit - error rates
連續可變斜率增量調制的語音編碼可以在高誤碼率的情況下正常工作。Secondly, the paper perform a review of the most common modulation methods used in such systems, including ook, ppm, overlapping - ppm, a hybrid modulation scheme called appm
其次,本文對常用的幾種調制解調方式進行了研究。包括ook 、 ppm 、交疊調制oppm 、混和調制方案appm ,得到了關于符號誤碼率和通道容量的表達式。Simulation results reveal that ipos protocol could solve the problem of high error bit rate with adoption of the error control scheme in the data link layer and adaptive coding modulation
模擬結果表明, ipos協議通過採用鏈路層差錯控制和自適應編碼調制方法,解決了衛星通道的高誤碼率現象。Introduction to communication systems ? analysis and design of communication systems ; analog and digital modulation and demodulation, frequency conversion, multiplexing, noise and distortion ; spectral and signal - to - noise ratio analysis, probability of error in digital systems, spread spectrum
通信系統基礎:通信系統分析和設計,模擬和數字調制和解調,頻率轉換,統計復用,噪聲和失真;譜分析和信噪比分析,數字系統誤碼率,擴展頻譜。分享友人