每个子信道上的比特取决于该子信道的信噪比。
The number of bits on each subchannel depends on the Signal-to-Noise Ratio of the subchannel .
对于多载波系统，载波频率的偏移会导致子信道之间产生干扰。
The offset of carrier frequency can cause interference between subchannels in a multicarrier system.
在远端串扰时，其各子信道仍然存在着较大的频谱重叠，使误码率增加。
However, in far-end crosstalk, its sub-channels exist still a lot of frequency spectrum overlapping and increase error-rate.
最后，自适应调制被施加到所选择的用户的基础上的BER约束各子信道。
Finally, adaptive modulation is applied to each sub-channel of the selected user based on the BER constraint.
在此方案中，用一个三粒子纠缠态作为量子信道，传送两比特未知原子态。
In this scheme, a three-particle entangled state is used as quantum channel to teleport a two-qubit atomic state.
虽然选用了不同的量子信道，但同样可以实现任意三粒子态的概率隐形传输。
Although choosing different quantum channel, we also may realize teleportation of an arbitrary three-particle state.
该方、去通过固定排序后的子信道的功率和比特分配方案大大降低了复杂度。
A low-complexity bit and power allocation algorithm is proposed based on this structure.
该系统利用大量的子信道使得总的信号速率能够非常接近给定频带的奈奎斯特速率。
The system can make the total signaling rate very close to the Nyquist rate of…
针对MQAM调制，采用变步长的贪婪算法得到优化的子信道比特加载及功率分配方案。
For MQAM modulation, the optimized bit loading and power allocation were derived from a various-step greedy algorithm.
时变信道以及信道冲激响应超过CP会带来子信道间干扰（ICI）和残留码间干扰（ISI），产生误码率平台。
The interchannel interference(ICI) and the residual intersymbol interference(ISI) could be introduced by time varying channel with channel impulse response that exceeds the length of CP.
通过对OFDM的子信道比特分配空间进行分析，本文提出着眼于误比特概率梯度的动态lms算法和全局优化算法。
In this paper, dynamical LMS algorithm and global optimization algorithm, with a view to gradient of error probability, are proposed based on analysis of sub-carries allocation space for OFDM system.
针对问题的非凸性，提出了基于拉格朗日对偶方法的最优子信道、速率和功率分配算法，并从经济学的角度予以解释。
We formulated this optimization problem and solved it using the Lagrangian dual method and interpreted it from the angle of economics.
这种方案利用小波变换特殊的优越性，使得各子信道之间的频谱分隔特性大大改善，并在码间干扰严重的情况下，仍然具有较好的传输性能。
This scheme makes use of the advantages of wavelet to improve the frequency spectrum compart character between different channels, the transmission is very well even under the badly ISI condition.
第二种方法是基于虚拟子载波的子空间盲信道估计方法。
The second method is based on the virtual sub-carrier subspace blind channel estimation method.
基于连续OFDM符号上的导频子载波，给出了联合频率偏移纠正和信道估计方法。
In this paper, the pilot subcarriers on two consecutive OFDM symbols are utilized for joint frequency offset correction and channel estimation.
本文将信号处理中的子空间方法同分层空时码的编码结构相结合，提出了一种垂直分层空时编码，实现了无需训练序列的信道估计。
In this paper, by combining the subspace method with layered space-time codes, we propose a vertical layered space-time code and accomplish the channel estimation without the training symbols.
模拟结果表明引入子载波分组后系统性能依然保持良好，并且信道估计偏差对本算法的影响较小。
Simulation results show that subcarrier grouping just has a little influence on system performance. Meanwhile the imperfect channel estimation has little effects on the present algorithm.
通过在阵列天线多载波ds - CD MA系统下构造统一的信号模型，实现了基于子空间的信道盲估计。
By unified signal model of antenna array Multicarrier DS-CDMA system, the subspace-based blind channel estimation is achieved.
在基于频域导频的信道估计中，研究了导频子载波处的信道估计方法和数据子载波处的信道估计方法。
In the frequency domain pilot channel estimation, this thesis studies the pilot subcarrier and data subcarrier channel estimation algorithms.
通过对信道状态信息进行判断，利用贪婪算法将用户子载波分配的比特取整，以实现系统功率最小化。
Then, the bit was rounded by the greedy algorithm with the channel state information judgment, to obtain the minimized transmission power of the system.
利用物理层的信道状态信息，该算法将物理层（PHY）的子载波分配同数据链路层（DLL）的数据包业务调度结合起来。
This algorithm combined sub-carrier allocation in the physical(PHY) layer with traffic scheduling at the data link layer (DLL) by employing the channel state information.
采用最小噪声子空间方法，提出了一种通信信道盲辨识算法。
A new blind identification algorithm for the communication channel is presented by using minimum noise subspace approach.
OFDM系统的LS信道估计可看作真实信道频率响应的一个有噪观察值，因此可采用子空间投影方法对噪声进行压缩。
The LS channel estimation of OFDM systems can be viewed as a noisy observation of the true channel frequency response, so the noise component can be compressed through subspace projecting.
文中使用了改进的子空间跟踪信道估计算法，并仿真了不同信道估计方法、合并方法下系统的误比特率性能。
We use a modified subspace tracking channel estimation algorithm and simulate the system BER performance under different channel estimation approaches and combining methods.
每个参与者的私钥作为其子秘密，秘密分发者和参与者之间无需维护安全信道。
Each participant's private key was used as his secret share. No security channel existed between the dealer and the participants.
改进的多用户检测算法将子空间算法和约束优化算法结合起来，在强干扰信道中能有效提高系统性能。
This algorithm joint the constrained optimization algorithm and subspace algorithm, can improve the system performance in strong interfere environment.
改进的多用户检测算法将子空间算法和约束优化算法结合起来，在强干扰信道中能有效提高系统性能。
This algorithm joint the constrained optimization algorithm and subspace algorithm, can improve the system performance in strong interfere environment.
应用推荐