Andrea Goldsmith: There's not enough spectrum to assign every phone in the world its own dedicated channel so we have to reuse the channels and that causes interference between users.
安德里亚·戈德史密斯:由于频谱资源有限,我们很难让每个用户享有特定的频段,只能不断地将它们回收利用,导致用户之间出现通信干扰。
This paper investigates blind space-time interference suppression for MultiCarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel.
该文研究在频率选择性瑞利衰落信道中MC-CDMA系统的盲空时干扰抑制。
Inter symbol interference is regard of transporting the high rate data main obstacle in the wireless mobile channel.
码间干扰被认为是在移动无线通信信道中传输高速率数据时的主要障碍。
Simulation shows co-channel interference and maximum multi-path delay spread have significant impact on the BER performance and PDMRC gives the best performance in most common environment.
仿真表明同信道干扰与最大多径延迟扩展对系统性能影响很大,在通常情况下采用PDMRC具有最好的性能。
The interference sources and their coupling channel of the monitoring system have been analyzed and several measures have been taken to restrain interference in industrial environment.
分析了监测系统在工业环境中的干扰源和耦合通道,采取了抑制干扰的若干措施。
Time variant multipath propagation in acoustic channel causes serious intersymbol interference (ISI), which makes high speed data transmission over acoustic channel very difficult.
但水声信道的时变多途效应造成接收数据严重的码间干扰(I S I),使得高速水声通讯的实现十分困难。
In DS CDMA channels with multipath and multiple access interference, this paper estimates blindly the user channel with extended space time channel model to process the blind MMSE detection.
在多径多址干扰DS CDMA环境中,本文根据空时信号模型,用扩展的盲方法估计用户信道,从而进行盲mmse检测。
Since UWB system generally operates in dense multipath indoor channel, multipath interference becomes one of the main interferences affecting system performance.
UWB主要应用于密集多径室内信道中,多径干扰是系统的主要干扰来源之一。
For hardware design, RC filter, voltage sensitive resistor and photoelectric isolation method are used to eliminate interference signal in sampling channel and A/D channel.
在硬件方面,采用RC滤波器、压敏电阻、光电隔离等措施,消除了采样通道及A/D通道的干扰信号;
In shortwave communication system, Intersymbol Interference is serious and signal is distorted extremely because of fading channel resulted in by the effect of multipath.
在短波通信系统中,由于多径效应常常引起信道衰落,直接结果是码间串扰非常严重。
By the means of networking communication, the best link can be chosen in the network, thus overcoming the disadvantages, such as the instability, interference and frangibility of the channel.
采用组网通信方式可以在网内选择最佳链路,克服信道不稳定、干扰大、可靠性差等不足。
In traditional wireless communication, due to the interference of the external environment and channel instability, the outage probability of network is high.
传统的无线通信中,由于外部环境的干扰,信道的不稳定,网络的中断率比较高。
Generally speaking, significant improvement of carrier to interference ratio of the system can be achieved in this way. As a result, the capacity and channel transmission quality can be improved.
一般认为,这一应用可以从根本上解决移动通信自干扰系统的载干比问题,并因此实现用户容量和信道传输质量的根本性改善。
We can simply use an interference eliminator in voice and low rate data user receiver to eliminate the self-interference produced by high rate data channel.
在语音和低速数据用户接收机中可以使用简单的干扰抵消器,用于消除一条高速数据信道产生的自干扰。
Then, the collected uplink and downlink interference measurements are analyzed in accordance with an adaptive channel allocation strategy.
然后,根据一种自适应信道分配策略分析所收集的上行链路和下行链路干扰测量值。
In CDMA mobile communication systems, multiple access interference can be cancelled by multiuser detection technique. The degradation by channel fading can be reduced by diversity reception.
在CD MA移动通信系统中,多址接入干扰可以通过多用户检测技术来消除,而分集接收可以减小信道衰落的影响。
This paper analyzes frequency interference, control channel interference and service channel interference in PHS and it also gives some solutions.
文章主要对频率干扰进行了讨论分析,结合对PHS中控制信道干扰、业务信道干扰的分析及一些解决方法进行了探讨。
The channel of fixed interface on node is assigned according to link weight, in order to decrease network interference in the process of channel switching.
根据链路权重为节点固定接口分配信道,减小可切换接口在信道改变过程中引起的网络干扰。
The bit error rate of three modulations in a fast fading channel with cochannel interference is evaluated.
分析了这三种调制方式的抗衰落及抗同道干扰的误比特率性能。
In radio communication system, because of multipath effect and the finity of channel bandwidth and incomplete channel, intersymbol interference (ISI) is inescapability during the data transfer.
在无线通信系统中,信号在传输过程中由于多径效应和信道带宽的有限性以及信道特性的不完善性导致不可避免地产生码间串扰。
The key technology in it, such as interference discrimination, self-adaptive modulation strategy and channel quality estimation are discussed in this paper particularly.
对其中的关键技术:干扰辨识、自适应调制策略和信道质量估计进行了详细的讨论。
A novel approach is proposed for linear multi user detection in conjunction with transmit diversity to combat channel fading, multi user interference and inter symbol interference.
提出了一种将线性多用户检测与发射分集相结合的新方法,该方法能在克服信道衰落的同时抑制多址干扰和码间串扰。
The notch filter proposed is used to attenuate the adjacent channel interference in the Loran-C receiver.
本文设计的陷波器用于衰减罗兰C接收机的邻道干扰,而且其调谐是在微机管理下处自动进行的。
In the receiver, successive interference cancellation is employed to remove or suppress sever multiuser interference, and this detector is easy to implement and apt to Rayleigh fading channel.
接收端采用串行干扰抵消的方法去除或抑制很严重的多用户干扰,该方法实现简单,适合瑞利衰落信道。
DTMF has perfect anti-interference and some anti-Doppler shift ability and is widely used for low rate communication in audio channel.
DT MF信号具有优良的抗干扰性能和一定的抗多普勒频移的能力,广泛应用于语音信道的低速数据通信。
In cellular systems, transmitter power must be controlled in order to reduce the co-channel interference caused by frequency reuse.
在蜂窝通信系统中,为了减小由于频率复用造成的共信道干扰,必须对用户的发送功率进行控制。
It can be used in multipath channels to suppress multi-address interference and overcome multi-channel fading.
本文中提出的这种算法适用于多径衰落信道,能很好抵消多址干扰和克服多径衰落。
The co-channel interference of bluetooth multi-piconets is considered as one of an important problem in reality.
蓝牙匹克网之间的同频干扰是蓝牙应用面临的重要问题之一。
The received signal is often corrupted badly by inter-symbol interference in the multipath fa- ding wireless channel circumstance.
数字通信系统中多径衰落的无线信道环境通常会使接收信号受到严重的码间干扰。
The received signal is often corrupted badly by inter-symbol interference in the multipath fa- ding wireless channel circumstance.
数字通信系统中多径衰落的无线信道环境通常会使接收信号受到严重的码间干扰。
应用推荐