Harqs with different coding lengths and modulation schemes are allocated according to the snr of received signal 根據(jù)用戶接收信號的信噪比,調(diào)整harq方案的編碼長度和調(diào)制方式。
I would not want to emphasize loc too strongly - obviously , you can play games with minimizing or maximizing code length 我不希望太過強調(diào)代碼行數(shù)顯然,您可以通過最小化或最大化代碼長度做手腳。
Absolute minimal trellis complexities of extended codes and their dual codes of two types of linear block codes whose code length is odd are given 給出了兩類奇數(shù)碼長線性分組碼的擴展碼及其對偶碼的絕對最小網(wǎng)格圖復(fù)雜度。
Wide doppler range . varied code length , varied code rate , which have more difficulties . little acquisition time and high acquisition probability are required during the capturing process of spread spectrum signals 對高動態(tài)、高碼率、低信噪比、大多普勒及變化的碼長和碼率的擴頻信號的快捕是本文的難點。
( 2 , 1 , 7 ) nonsystematic convolutional codes are optimal convolutional codes on the same code length and information bit length condition , so they are adopted as space standard codes by ccsds ( consultative committee for space data systems ) ( 2 , 1 , 7 )非系統(tǒng)卷積碼在相同的碼長和信息長度下為最佳卷積碼,因此被ccsds (空間數(shù)據(jù)系統(tǒng)咨詢委員會)采納為空間標(biāo)準(zhǔn)碼。
The encoding complexity of ldpc codes length n seems indeed to be of order n2 , the dissertation study the coding scheme with linear time complexity . afterward , it introduces the coding schemes used in dvb - s2 and gets the parity check matrix by simulation 針對ldpc碼通用編碼算法的復(fù)雜度與碼長的平方成正比的問題,重點研究了ldpc碼的快速編碼方法,總結(jié)出了使ldpc碼能夠達(dá)到線性編碼的途徑。
The code length is very large when it be used . also , a significant amount of memory is needed to store their parity - check matrices . in this way , the encoding problem of ldpc codes may be an obstacle for their applications because they have high encoding complexity Ldpc碼在應(yīng)用時選定的碼長很長而且編碼實現(xiàn)時所需的用于存儲的寄存器數(shù)量非常多,這樣,其編碼復(fù)雜度特別大,成為應(yīng)用的一個障礙。
In the awgn channel , the effect to the ra code and ara code ’ s performance of some simulation parameters is considered , which include code length , iteration number , decoding algorithms , different rate and so on , and the performance of the ra code and ara code is compared 在awgn信道中,考慮了ra碼和ara碼的一些設(shè)計參數(shù),如碼長、迭代次數(shù)、譯碼算法、碼率等對誤碼性能的影響,以及ra碼和ara碼的性能比較。
Every class endues a binary code , then a set of svms are used to solve the multiple binary problems . the generalization performance of ecc - svm is analyzed , which is determined by code length , hamming distance , coding sequence and margins of svms 本文提出了基于糾錯編碼的svm多類分類算法( ecc - svm ) ,并分析了ecc - svm的推廣能力與編碼長度、碼間漢明距離、編碼順序以及分類間隙等之間的關(guān)系,給出了這種關(guān)系的數(shù)學(xué)描述。
The performance targets of acquisition and tracking : the code rate of pseudorandom signals is 1m - 5mhz , the code length is 255 . 511 , the receiving sensitivity is - 118dbm , the dynamic range is 70db . the doppler of carrier is 75khz , the time that 10 targets are captured within 0 . 2s 捕獲和跟蹤的性能指標(biāo):偽隨機信號碼率1m 5m比特/秒,碼長是255 、 511 ,接收靈敏度是- 118db ,信號動態(tài)范圍是70db載波普勒是75khz ,目標(biāo)捕獲在0 . 2秒內(nèi)。