decoding band 中文意思是什麼
decoding band
解釋
譯碼環-
The numerical simulation equations of the border curves in term of and as well as the matching rules and the frequency dependence of microwave electromagnetic parameters of a broad - band homogeneous absorbing coating with a finite value of reflection loss are available. these results pointed out the direction to develop rams ". according to the radar - absorbing model, the optimized design of rams with thin - layer, light - weight, broadband and strong - absorbing is available by the simple genetic algorithms, which can effectively conduct the research work of rams to the detail. small but completely, the electromagnetic parameter ' s databases of rams that based on actual microwave absorbers have been set up, the object function has been constructed which conform to the involved goals, the adaptive coding measure is taken which extends the coding length dynamically adapting to the condition of the number of actual absorbers or the precision of thickness and absorber - volume - percentage, the decoding technique is initiated which satisfies light - weight and strong - absorbing as well as thin - layer and broadband by adopting of tracing variable restricting conditions dynamically to control total thickness. when decoding, the variable restricting conditions of thickness are dynamically traced, so gain the radar absorbing coatings of light - weight multiple - layer single - ingredient. similary, of thickness and absorber - volume - percentage, of light - weight multiple - layer multiple - ingredient. also, the rams ' demand to radar - absorb performance as frequency is met making use of the penalty function
作為遺傳演算法的具體實施：根據本實驗室近來研製的吸波材料，建立了吸波材料的相關數據庫；構造了能真實體現「薄、輕、寬、強」優化目標的目標函數；根據材料的實際數量以及塗層厚度精度要求、吸收劑體積分數精度要求，建立了能動態擴展相應碼長的自適應編碼方法；首創了通過動態跟蹤變量的約束條件來控制塗層總厚度的解碼技術，以此實現了在不弱化寬頻、高強的吸波性能目標的同時，兼顧到薄層、輕質的使用性能要求；在解碼時通過動態跟蹤厚度變量的約束條件，實現了多層單組分吸波塗層對重量輕的要求；通過動態跟蹤厚度變量的約束條件和吸收劑體積分數的約束條件，實現了多層多組分吸波塗層對重量輕的要求；使用權重系數變化法，實現了吸波塗層的分頻段吸波性能要求。 -
The main work of the base - band process part of the receiver is demodulation and decoding, the link control part does the framing and forwarding
接收機的基帶處理部分主要是解調和譯碼，鏈路控制部分組幀和轉發。 -
The goal of this thesis is to accomplish base - band channel coding / decoding, fh framing / de - framing and fh synchronization, and also to control the modulator and demodulator in the prototype system. all these functions are implemented with a tms320vc5409 dsp
作為項目的一個重要組成部分，本文採用dsptms320vc5409實現了基帶處理部分的通道編解碼、跳頻意義的組拆幀和跳頻同步、並對調制解調晶元讀寫寄存器進行了配置。 -
The method includes split originality image region, filter, separately coding the lowest frequency sub - band coefficient, adaptively setting threshold of different image region, setting up flag matrix, and filtering after decoding to eliminate domino effect of split
這種編碼方法主要包括：對原始圖像進行分塊、濾波；對最低頻子帶系數單獨編碼；對各塊圖像自適應地進行閾值設置；設立標志矩陣；解碼后進行濾波消除分塊效應。 -
Furthermore, we use the matlab simulation result to analyze the capability of viterbi decoding. finally, we complete the fpga designing of each module in the base - band processing unit, including parallel - to - serial conversion module, framing module, convolutional coding module in the sending end, serial to parallel conversion module, viterbi
基帶處理單元各模塊的fpga設計主要包括發送端並串轉換模塊、成幀模塊、卷積編碼模塊、接收端串並轉換模塊和viterbi譯碼模塊，應用quartusii5 . 1開發平臺以及modelsim模擬軟體，給出了模擬結果。 -
In section three, a complementary scheme of spectral coding and decoding is proposed. it makes full use of the broad band incoherent gauss optical source and compensates the unflatness of sectrum of the source. combining with the method of banlanced detecting, the multiple accsss interference of the multiple users is rejected in the decoding port
不同於ocdma系統中每個用戶擁有一對編解碼器，該方案通過利用二維rs碼字的周期性和awg路由器的循環性，系統所用的編解碼器能夠同時對不同用戶的地址碼進行編解碼，使得系統中的用戶共享編解碼資源，減少了系統的復雜性。 -
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。
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