The problems of echo cancellation in the system of high rate data transmission are studied in this paper.
本文探讨高速数据传输系统中的回波抵消问题。
Orthogonal Frequnency Division Multiplexing(OFDM) is suitable for high rate data transmission in wireless channels because it can combat Inter-Symbol Interference and multipath fading efficiently.
正交频分复用（OFDM）技术具有很强的抗符号间干扰、抗多径衰落和时延的能力。并且保持较高的传输速率。
Aiming at the requirement for reliability and very high data rate transmission for broadband wireless communication, a LDPC coded MIMO-OFDM system model was proposed.
针对宽带无线通信系统对高可靠性和高速率数据传输的要求，本文介绍了一种基于LDPC码的MIMO - OFDM宽带无线通信系统模型。
The next generation mobile communication 4g called will support very high data transmission rate. It's necessary to introduce technology with high frequency utilization in limited frequency spectrum.
未来的新一代移动通信系统4g需要提供极高的数据速率，在有限的频谱下提供尽可能高的传输速率，这就需要采用高频谱利用率技术。
V-BLAST (Vertical Bell Laboratories Layerd Space-Time) can be combined with OFDM to achieve high data rate transmission in frequency selective fading channels .
技术可以和OFDM技术结合以便在高的频率选择性衰落信道下提供高数据率的传输。
At present, polarization mode dispersion (PMD) has become an important limiting factor for the performance of long distance transmission, high rate data and analog communication systems.
目前偏振模色散(PMD)已成为长距离传输、高速率数据和模拟系统的主要限制因素。
DMA technology plays an important role in increasing the data transmission rate, especially for high rate transmission.
DMA技术在提高数据传送速率方面有着重要作用，特别是对于高速率数据传送。
The data transmission rate with correlative coding can be twice as high as that with AMI or HDB3, thus may improving the efficiency of seismic exploration.
相关编码信号比AMI或HDB3编码的信号的数据传输速率可以提高一倍，从而提高地震勘探的效率。
The combination of the advantages of VMIMO and OFDMA technique is suitable for the high data rate transmission for the next wireless communication systems.
将VMIMO和OFDMA技术的优势相结合，非常适合下一代无线通信系统对高速数据传输速率的要求。
It combines the advantages of OFDM and CDMA, and its capability of combating ISI is obviously better than that of a single-carrier CDMA for the high data rate transmission.
它结合了OFDM和CDMA的优点，在高速数据传输时，其抗符号间干扰的性能明显优于传统的单载波cdma系统。
OFDM (Orthogonal Frequency Division Multiplexing) is a new modulation technology, it is suitable to high-data-rate transmission in the wireless transfer channel with multi-path transmission.
正交频分复用(OFDM)是一种新型调制技术，特别适合在多径传播的无线移动信道中高速传输数据。
As an efficient data transmission technique, OFDM can resist multi-path fading and realize high data rate transmission.
作为一种高效的数据传输技术，正交频分复用(OFDM)技术具有良好的抗衰落能力，实现数据的高速传输。
In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay.
在一种可以用可变速率传输的数据通信系统中，高速率分组数据传输改进了正向链路的应用，并降低了传输延迟。
In this scheme, an MS USES a low transmission rate for data transfer when MS is within high interference region to avoid wasting bandwidth by transmitting data in the condition with high interference.
这个方案是当一个MS位于高干扰区域时，为了避免浪费带宽，对数据传输采用低的传输速率。
However, the digital speech needs much higher code rate than analogue signals resulting in high pressure on data transmission.
语音数字化以后，码率大幅度上升，给系统的数据传输造成了很大的压力，因此进行语音压缩编码是非常必要的。
In high-speed serial links, equalization techniques can effectively improve the data rate or increase the transmission distance.
在高速串行链路中，均衡技术可以有效地提高数据速率或增加传输距离。
The results of running this system indicate that the data transmission system has the advantage of high reliability, low communication fees, and the data receiving rate can attain to 99 percent.
系统运行结果表明，该数据通信系统可靠性高，通讯费用低，数据接收率达到99%。
OFDM technology has many advantages, such as defending the multipath fading and high bandwidth efficiency, which are suitable for the high-rate data transmission in wireless enviroment.
而且OFDM技术具有抗多径衰落，频谱利用率高等优点，特别适合于无线环境下的高速数据传输。
Since this decoder has high error-correcting speed and regular structure, it may apply to data transmission and storage to decrease error rate.
由于该译码器有较高的纠错速率和规则的设计结构，使它可以方便地用于数据传输和存储过程中进行差错控制。
Compared with the existing video acquisition system, this system has high stability, long distance transmission, large transmission data rate, and short transmission delay.
相对于现有的视频采集系统，该系统具有稳定性高、传输距离远，数据量大、传输延时小等特点。
Orthogonal frequency division multiplex (OFDM) is an effective method to realize high data rate transmission.
正交频分复用(OFDM)是实现高速数据传输的一种有效方法。
But the data efficiency of STBC is restricted to orthogonal transmission and the bit error rate of BLAST is high due to the error propagation.
但由于空时分组码受正交条件限制，传输效率得不到提高，而BLAST系统存在差错传播制约着误码率的下降。
The experiment of the system proved that it can realize stable wireless data transmission with low BER and high transfer rate.
经过试验表明，该系统误码率低，传输速率快，能实现可靠的无线数据传输。
This technique has not only high transmission rate for data, but also strong adaptability for bad environment.
该项技术不仅提高了数据传输率，而且还具有抗恶劣环境能力强等特点。
The future wireless mobile communication systems are expected to provide high-rate, high-quality and efficient data transmission.
未来无线移动通信系统对数据传输速率、通信可靠性及有效性提出了更高的要求。
Multi-carrier transmission technology-Orthogonal Frequency Division Multiplexing (OFDM), as the core technology of beyond 3g, has the characteristic of high data rate.
而多载波传输技术-正交频分复用(OFDM)，作为后三代移动通信的核心技术，则具有高数据速率传输的特点。
Phase correction is essential to OFDM-based high-data-rate transmission system.
相位校正对基于OFDM的高速数据传输系统至关重要。
However, wireless channels have enormous limitations to reliable high data rate transmission, especially for video.
无线信道对于可靠的视频传输具有很大的局限性。
Orthogonal Frequency Division Multiplex Access (OFDMA) is widely used for its characteristics of high data transmission rate and the flexibility of bandwidth allocation.
正交频分复用接入(OFDMA)具有传输速率高，带宽分配灵活等特点。
Orthogonal Frequency Division Multiplex Access (OFDMA) is widely used for its characteristics of high data transmission rate and the flexibility of bandwidth allocation.
正交频分复用接入(OFDMA)具有传输速率高，带宽分配灵活等特点。
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