查询词典 selective channel

Large amount of multi-access capacity is needed for mobile and personal communications, however the channel suffers severe frequency selective fading.

移动和个人通信的信道环境是一个时变的频率选择性信道，同时又是一个多址大容量的信道。

With two transmit antennas, based on lower bound for LS channel estimation, it is shown that the periodic complementary set is optimal over frequency-selective fading channels.

针对基于循环前缀的单载波系统，提出了联合Alamouti-like STBC和最小均方信道估计方案。

The channel property of frequency selective fading and Doppler frequency shift are the biggest challenge to the broadband mobile communication service.

在信道的衰落特性中，对宽带无线移动业务影响最大的是多径衰落和多普勒频移。

On the basis of setting up a model of the parallel transmission link of short-wave data communication system, this paper analyses the anti-noise performance of data communication in a non-selective Rayleigh gradually fading ionosphere channel, and derives the average error code rate formular and its curves.

在建立并发制短波数据通信系统模型的基础上，分析了非选择性瑞利慢衰落电离层信道中数据通信抗噪声性能，并导出了平均误码率公式，生成了误码率曲线，为雷达情报短波数据通信链路的仿真及效能评估提供理论依据

Quinidine, a HERG potassium channel selective blocker, could depress the currents.

反之，降低细胞外液中的钾离子浓度，外向电流的幅度减小。

However, accurate channel estimation robust to noise statistics characteristics with low implementation complexity is a challenging task for MIMO-OFDM doubly-selective wideband channels.

在衰落信道环境下，信道估计则是确保MIMO-OFDM能够有效实现的重要环节。

This means that, in most cases, only a very small part of an object will lie within this area. If we want to observe the object in detail, we have to move the fixation point frequently to make the different parts of the object lie within the central area. In addition, with such a small central area, the separation of foveal and peripheral channel becomes meaningless. Consider all the above aspects, we propose in this thesis a visual computing model based on selective attention mechanism.

针对上述问题，本文的模型引入选择注意机制，并将之建立在非均匀采样表示与处理的基础上，我们提出了一种可以随视觉任务变化的可变结构的非均匀采样信息表示方法，并通过它将后继的视觉处理分成相对独立的中央和周边通道，分别完成对感兴趣物体的识别和注意点的快速转移，后者相当于对感兴趣物体的一个粗定位过程。

The radio channel is time-variant, frequency-selective and noisy, so the received OFDM signals are corrupted by intercarrier interference.

但是由于无线信道的多径性和时变性，造成了接收端 OFDM 符号子载波间的干扰，为了能够准确地解调 OFDM 信号，就必须对接收到的信号进行信道估计。

However, for the wireless mobile communication systems, the radio channel is frequency selective and time-varying.

对于无线通信系统，无线信道不仅是频率选择性的，而且是时变的。

In a multipath radio channel, frequency selective fading can result in large variation in the received power of each carrier.

在一个多路径收音机频道中，选择的时尚频率能造成每个运送者的被一般承认力量的大变化。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。