bit error rate造句
例句与造句
- Because of huge data quantum and high demand of channel bit error rate for video transmission , and fallibility , time variability and limited band of wires channel , wireless video system is faced with lots of problems
由于视频业务的数据量大、对误比特率要求高，无线信道又具有易错、时变和带限的特点，因此信道的误比特率要比有线环境大得多，且随着基站和终端位置、方向的改变而变化很大。 - Besides , traditional modes , such as am and fm without spread spectrum , cannot meet requirements of hydrologic data transmission in the adverse circumstances during the high - water or tide season , since those modes are easily interfered and have high bit error rate
另外，传统的调幅、调频等通信方式亦存在易受干扰、误码率高等缺点，在信道环境恶劣的汛期往往不能满足水文数据传输的要求。 - On the basis of sga , the validity of improved gaussian approximation ( iga ) method is established in our systems and the accuracy of the bit error rate expression obtained via siga is demonstrated with monte - carlo simulations
在此基础上证明改进型高斯近似法( improvedgassianapproximation ,简称iga )在本文所述系统中的适用性,并利用其简化算法( simplifiediga ,简称siga )得到简洁的误码率近似表达式。 - This thesis researched the time synchronization method for 2d - ss system , and deeply discussed the bit error rate ( ber ) performance of multicarrier domain spread spectrum chip - level differential detection ( mc - ss - cldd ) in the presence of multi - user interference
本论文从多载波扩频通信系统出发,提出了广义二维扩频系统的同步算法,并对多载波频域扩频码片级差分检测技术在多用户情况下的系统性能进行了深入的研究。 - 2 . with the principles of statistical signal processing theory and density function estimating theory , the minimum bit error rate ( mber ) mud and the least bit error rate ( lber ) mud using optimum designing methods under synchronous ds - cdma downlink are studied . 3
以统计信号处理理论和密度函数估计理论为基础，利用最优化设计方法在同步ds - cdma系统的下行链路研究了最小误码率多用户检测器及自适应实现的lber多用户检测器。 - It's difficult to find bit error rate in a sentence. 用bit error rate造句挺难的
- The power of multiple access interference ( mai ) directly confines the capacity of ds - cdma system . as the mainstream of mai suppression technologies , multi - user detection ( mud ) performs a significant role to improve the bit error rate ( ber ) performance and to increase the capacity of systems
在直扩码分多址( ds - cdma )系统中存在的多种干扰中，多址干扰对系统性能的影响最为强烈，多址干扰的强弱会直接影响到系统容量的大小。 - 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 )
为结合直扩通信系统的有效干扰研究工作,建立了直扩系统从信号的调制产生,信道传输、信号同步解扩解调和误码率统计的全过程仿真系统。 - At present , universities built own campus network in order to satisfy their education 、 research and information . this made people study network technology more and more widely . my paper research emphatically average net delay 、 throughput and bit error rate whose source is yanshan university fund
这使得对网络的研究也越来越深入。本课题以燕山大学校基金为课题来源，重点研究了校园以太网的网络平均时延、吞吐量、误码率这三种性能指标。 - Based on the obtained lower bounds on mean squared channel estimation errors , the limits on bit error rate ( ber ) for maximal ratio combining ( mrc ) with gaussian distributed weighting errors on independent and identically distributed ( i . i . d ) fading channels are presented
通过对不同衰落信道多普勒谱的积分，求出了相应的信道估计均方误差下界的闭合表达式，并在此基础上得到了分集系统在独立同分布的衰落信道中采用最大比合并时的误码率下界。 - Then , analytical expressions of the bit error rates are derived under rayleigh fading model and multi - path rayleigh fading channel model . analytical and simulation results are compared . the multi - path performance of the non - coherent dcsk system is also compared with that of the coherent csk system
接着对非相干dcsk系统在瑞利衰落及多径瑞利衰落信道下进行性能分析,通过仿真实验来验证理论分析结果,并与相干csk系统的抗多径衰落性能比较。 - Focusing on this problem , this paper presents a new framework for adjustable power allocation , discusses the power allocation when each user has the limited power , and researches on the target of minimizing the sum of two users bit error rate based on the framework
针对这个问题，给出了一种新的具有可调系数的功率分配框架，讨论了在每个用户功率受限情况下的功率分配方案，并且基于该框架研究了以2用户的比特误码率之和最小为目标函数的功率分配方案。 - And it turns out that the bit error rate of passband equalizer is smaller than that of baseband equalizer , but the convergent stability of baseband equalizer is better than that of passband equalizer . at the same time , baseband equalizer can be implemented in hardware more easily than passband equalizer
通带均衡系统的误码率总是小于基带均衡系统的误码率;但基带均衡器收敛后的稳定性要比通带均衡器好,且基带均衡器的采样频率较低,易于硬件实现。 - A new turbo codes using chaotic soft spreading spectrum is also suggested . by theoretic analysis and simulation , the novel codes has better performance such as lower ber ( bit error rate ) and other features as compared to conventional turbo codes . on this basis , a new codes called rsi ( random spreading iterative ) codes with the capability of approaching the shannon limit is introduced
3 、提出了一种基于混沌软扩频的turbo码设计方法，通过理论分析和仿真，证实了该方法比一般turbo码有更好的系统特性，更低的误码率和对系统性能的多重改善作用，显示出该方法优越的理论特性利实用价值。 - First of all , the characteristics of different adaptive algorithms and equalizers are theoretically researched . then digital microwave communication system model is build by simulink . based on this model , the convergent behavior and bit error rate performance of three equalizers ( nlms , kalman and rls ) are compared in multi - path fading channel
为了达到这个目的,首先需要从理论上对各种自适应均衡算法以及自适应均衡器的特性进行深入研究;然后利用simulink建立接近实际环境的数字微波通信系统,在多径衰减信道环境下比较了三种基带均衡器( nlms , kalman和rls )的收敛特性以及系统误码特性,并比较了nlms基带均衡器和通带均衡器的性能。 - By utilizing the main advantages of orthonormalization and power conservation from hilbert transformation , it is found that bit error rate is close to that of dcsk system , but transmission speed is one time higher than that of dcsk system , and the system ' s output variance is effectively reduced
基于qpsk的思想，引入qcsk调制方式，利用hilbert变换对正交且能量守恒的特性，有效减小了系统输出的方差，较dcsk系统，传输速率提高一倍，系统误比特率与dcsk系统相近。