uplink的例句大全

In this dissertation, the estimation algorithms of time-varying frequency selective channel in modern wireless communication systems including WCDMA uplink, WCDMA downlink with space time transmit diversity and MIMO system are investigated.

本文主要研究在现代无线移动通信系统中如何估计同时存在频率选择性和时间选择性衰落的信道，包括WCDMA上行链路，采用双天线空时发射分集的WCDMA下行链路和MIMO系统。

Both the air interface based on time division multiplex CDMA and the uplink synchronization techniques based on closed loop delay control are introduced. The influence of synchronization accuracy on bit error rate is analyzed.

介绍了时分复用码分多址空中接口和上行信号闭环延迟控制两项关键技术，分析了同步精度对比特误码率的影响。

As TD-LTE system is based on time division duplex, the uplink and downlink channel reciprocity can be employed for smart antennas.

由于TD-LTE系统是以时分的方式实现，可以利用上下行信道的互易性更好的发挥智能天线的优势。

It adopts time division duplex mode. It can be allocated bandwidth flexible and can adjust time slot base on different service types for uplink and downlink which increases bandwidth efficiency.

它采用时分双工的模式，可以灵活的分配带宽资源，并能根据业务类型自适应的调整上、下行分配的时隙数，提高了频谱利用率。

By using channel reciprocity in time division duplex ( TDD) MIMO systems, the base station ( BS) can implement data transmitting pretreatment according to the channel state information ( CSI) obtained by uplink measurement without additional feedback overhead.

基于时分双工（TDD）技术的MIMO系统可以利用上下行信道的互易性，使得基站能够直接基于检测到的上行信道状态信息制定下行发射预处理策略而不需要额外的反馈开销。

On the Capacity of Time Division Duplex-Code Division Multiple Access Uplink System with Multi-User Detection

基于多用户检测技术的时分双工-码分多址系统上行链路容量研究

The enhanced uplink technology for Time Divided-Synchronous Code Division Multiple Access ( TD-SCDMA) is used to improve uplink performance, to speed up the peak uplink rate, to enlarge the whole uplink throughput, and to decrease the transfer delay.

时分同步码分多址（TD-SCDMA）上行增强技术的主要目的是改善上行性能，显著提高上行分组数据的峰值传输速率，以及提高上行分组数据的总体吞吐量，同时减少传输延迟。

In this paper, a space-time processing receiver for WCDMA is presented for the uplink over the Gaussian channel and frequency selective Rayleigh fading channel.

本文针对处于加性高斯白噪声和频率选择性多径衰落信道下的WCDMA系统，提出一种空时处理的接收方案。

As the evolution of the third generation wireless communication system, 3GPP Long Term Evolution ( LTE) supports a greater system bandwidth, more flexible bandwidth configuration, higher peak data rate of the uplink and downlink, more flat the network structure and less access delay.

3GPP长期演进（LTE）作为第三代无线通信系统的演进，相比于3G系统LTE支持的系统带宽更大、带宽配置更灵活、上下行峰值速率更高、网络结构更扁平、接入时延更小。

The uplink and downlink loads are different because the rates of uplink and downlink asymmetric services are different.

非对称业务的上下行速率不同，因而其上下行负载也不同。

Compared with hard handover in uplink transmission power and FTP upload response time, the results confirmed that baton handover performed better in reducing uplink interference and shortening handover delay.

仿真结果证明，接力切换在降低上行干扰、缩短切换时延、降低掉话率方面性能更加优良。

The technologies for that include time stamp ranging and uplink transmission window control.

在EPON中实现上述目的的技术包括时间标签测距技术，以及上行发送窗口控制技术。

Especially for the load factor, interference margin analysis, this article gives the situation of different cell load uplink budget.

特别是对负荷因子、干扰余量进行了分析，给出了不同小区负荷情况的上行链路预算举例。

According to the key technique of semi-regeneration, the uplink synchronization process based on HAPS is designed and the uplink synchronization implementation scheme is given.

以高空平台半再生式处理方式为关键技术，描述了基于高空平台的上行同步流程，并阐述了上行同步实现方案。

Research of DBA Algorithm Based on Multi-service in EPON Uplink Access

EPON上行接入中基于多业务类型的DBA算法研究

However, while using multiple subcarriers ( OFDM), feeding back all the Channel Quality Information ( CQI) per user, per subcarrier would waste a substantial amount of uplink resource and therefore decrease the spectrum efficiency.

然而，在多载波（OFDM）的架构下，反馈全部用户的所有信道质量信息（CQI）将占据大量的上行资源，从而降低了实际频谱效率。

Blind Uplink Channel Estimation and Multiuser Detection in Code Division Multiple Access System

码分多址系统中的上行信道盲估计及多用户检测

Then, independently in the downlink and uplink, the HUF allocates bandwidth to every MS according to a pre-calculated U-factor which considers urgency, priority and fairness.

在上下行独自分配频宽给行动装置阶段，则利用一新颖的系数来决定每个需求的急迫性，以最急迫优先的分配方式来反映出延迟保证与公平性。

The method starts with difference between uplink and downlink signal delay to analyze how to increase timing precision, and applies Bayesian approach to compute satellite clock bias so as to calibrate it when DMSS is on orbit flying.

该方法以星间链路的上、下行信号传输延迟时间差为出发点进行分析以改善同步精度，并用贝叶斯估计对在轨运行的DMSS星间钟面差进行计算并校时。

A DFT spread generalized multi-carrier ( GMC) based frequency division multiple access ( FDMA) scheme, i.e. DFT-S-GMC is proposed for uplink transmission of wideband mobile communication systems.

针对宽带移动通信上行链路传输，提出一种基于离散傅立叶变换（DFT）的广义多载波（GMC）频分多址方案&DFT-S-GMC。