数据速率

随着人们对终端数据速率要求的不断增高，继第三代移动通信系统之后国际上新一代的移动通信标准LTE（LongTermEvolution）应运而生。

With the growing demand of data rate , LTE ( Long Term Evolution ) comes after the third generation mobile communication system .

其中MIMO能在不增加带宽和发射功率的情况下，成倍地提高无线通信的质量与数据速率。

MIMO can improve the quality of wireless communications and data rate largely without increasing bandwidth and transmission power .

在卫星通信中，宽带卫星通信的主要目标是为多媒体和高数据速率的Internet应用提供一种无所不在的通信方式。

In satellite communication , broadband satellite communication is focused on providing ubiquitous communication mode for multimedia and high bit rates Internet application .

SAW器件与半导体技术的结合是当前发展的一个重要趋势，AlN的高频和低色散性能有助于解决大数据速率的信号处理器件。

The combination of SAW devices and semiconductors is a general trend today .

多速率CDMA系统下行波束成形、功率控制与数据速率分配联合多变量模型的研究

Study on the Model with Multivariates of Downlink Beamforming , Power Control and Resource Allocation for Multi-rate CDMA System

采用直接数字频率合成器（DDS）产生频率可变时钟，使模块能以灵活多变的数据速率执行测试任务。

The variable frequency generated by dds enables the module to execute testing task at different data rate .

本文提出两种将IEEE802.11bWLAN物理层数据速率提高到16.5Mbps的编码和译码方法。

Two encoding and decoding approaches to increase the IEEE 802.11b WLAN physical layer data rate to 16.5 Mbps are proposed .

但是，要充分利用这一高数据速率，目前的IEEE802.11媒体存取控制（MAC）需要加强。

However , to fully utilize this high data rate , the current IEEE 802.11 medium access control ( MAC ) needs to be enhanced .

高速下行分组接入（HSDPA）作为WCDMA的增强技术，大大提高了下行数据速率。

As an enhanced technology of WCDMA , HSDPA has greatly increased the transmission rate of downstream data .

在高数据速率的环境下，与ATM和POS相比，SDL是一种颇具吸引力的方案。

Under the high data rate environments , SDL is a very attractive alternative to conventional solutions such as ATM and POS.

未来无线通信系统需要在保证业务服务质量（QoS）的同时，在有限的频带内提供更高的数据速率和频谱效率。

Future wireless communication systems face the great challenges of providing higher data rates and spectral efficiency with the limited frequency bandwidth , while guaranteeing quality of service ( QoS ) .

LTE-Advanced系统在带宽、用户数据速率、系统频谱效率等方面提出了更高的需求。

LTE-Advanced system demands more on bandwidth , user data rate and spectral efficiency .

人们期望，下一代（B3G／4G）移动通信系统能提供更高的数据速率，更大的系统容量支持更多的用户并且满足多种业务的不同服务质量（QoS）要求。

The next-generation mobile communication systems ( B3G / 4G ) provide high data-rate , support more subscribers and guarantee quality-of-service ( QoS ) .

对移动WiMAX及TD-CDM-OFDM的系统最大数据速率的分析

Calculation of System Maximum Data Rate for Mobile WiMAX and TD-CDM-OFDM

MIMO和OFDM的结合可得到MIMOOFDM系统，它能使提供更大的覆盖范围，更好的传输质量，更大的数据速率和频谱效率。

A MIMO-OFDM system is a seamless merger of MIMO and OFDM , which can potentially provide larger coverage range , more reliable transmission , higher date rate and spectrum efficiency .

不同业务有不同的服务质量（QoS）要求，如对时延、误比特率、数据速率的要求不同。

Heterogeneous services have different quality of service ( QoS ) requirements , for example , the requirements of time delay , error bit rate , and transmitting rate for heterogeneous services are differentiated .

因此，本文讨论了一种输出谱的频率单元速率等于输入数据速率，计算量较低的滑动DFT算法。

As a result , this dissertation studies an efficient algorithm - the sliding DFT algorithm whose spectral bin output rate is equal to the input data rate .

LTE的目标是获得更高的数据速率，更低的时延，改进的系统容量和覆盖范围，以及较低的成本。

The aim of LTE is to achieve higher data rates , lower latency , improved system capacity and coverage , as well as lower costs .

文中将WINNERⅡ信道模型应用到高铁通信系统，它能够满足高铁无线通信系统的高速数据速率、分组传送、延时低等要求。

In this thesis , the WINNER II channel model is applied to the high-speed communication systems because it can satisfy the high data rate , packet transmission and low latency requirements .

但由于频谱资源的限制，小区之间的干扰（ICI）将严重地影响小区边缘的数据速率。

Because of the constraints of spectrum resource , however , inter-cell interference ( ICI ) will seriously affect the data rate at the cell edge .

多载波的TD-SCDMAHSDPA系统采用的TDD模式所实现的最高理论数据速率，进一步说明了TD-SCDMAHSDPA频谱利用率比较高。

The maximum theoretical data rate realized by the TDD mode adopted by the Multi-carrier TD-SCDMA HSDPA system proved further that the TD-SCDMA HSDPA spectrum is higher .

由于HSPA+已经采用了MIMO和高阶调制等先进技术以提高频谱效率，所以提升系统带宽成为提高峰值数据速率自然而然的首选方案。

Due to that HSPA + has already adopt MIMO and high order modulation technology to improve the spectral efficiency , it is preferred to further improve the peak data rate by increasing the system bandwidth .

另外在给定信道频带的时候，它比BPSK传输的数据速率高，每秒能传输更多的比特。

On the other hand , if the channel 's bandwidth is presented , the data transmission rate of MSK is better than that of BPSK .

多速率设计提高了UWB-OFDM系统支持不同数据速率业务的能力。

Data multirate design improves the ability of UWB-OFDM system to support various rate services .

然而，传统的CDMA系统属于窄带扩频系统，它的数据速率比较低，不能胜任新一代移动通信系统（beyond3G）高速数据通信的需要。

But traditional CDMA system belongs to narrow-band spreading spectrum system , whose data rate is so low that it can not be competent to new generation mobile communication system ( beyond 3G ) that need high data rate .

该文针对3GPPWCDMA系统的反向链路，提出了一种基于MMSE接收机的功率和数据速率相结合的控制算法。

A combined power control and data rate adjustment scheme with Minimum Mean Square Error ( MMSE ) receiver for the 3GPP Wideband Code Division Multiple Access ( WCDMA ) reverse link is proposed .

3KΩ和1000pF负载情况下，在230.4kbit/s数据速率范围内，实现了TTL/CMOS电平到RS232电平转换的发送功能。

The chip realizes the conversion of TTL / CMOS levels to RS232 levels at 230.4 kbit / s data rate under 3 k Ω and 1 000 pF loads .

为了进一步满足无线用户对无缝覆盖、更高数据速率业务的需求，3GPP正在研究和制定LTE-A系统的后续演进标准。

In order to further meet the requirements of seamless coverage , higher data rate for wireless users , 3GPP is working on the standardization of LTE-Advanced system and its evolving system .

该程序采用了ASIP扩展的GPS软件接收机专用指令，理论上能在512KHz的GPS数据速率、8MHz的系统时钟下实现BITWISE相关器的实时运算。

The optimized BITWISE correlator program uses the instructions which are extended specially for GPS software receiver in ASIP . It can theoretically do real-time calculation in 512 KHz GPS data rate and 8 MHz system clock .

在5V电源电压、2.5Gbit/s数据速率下，该驱动器可提供0～68mA范围内的调制电流，满足长距离光纤通信系统的要求。

The driver can offer modulation current in the range of 0 to 68 mA under 2.5 Gbit / s , which meets the requirements of long haul optical fiber communication .