downlink and uplink meaning in English
下行链路与上行链路
Examples
- B3g designs a flexible frame which can adapt to different data transfer rates between downlink and uplink and can adapt to variable mobile speed
B3g设计了适用于上下行不同数据量要求的帧结构,以及适用于不同移动台速度的时隙结构。 - Hsdpa is written in release5 to increase transmit speed in certain time . as researchers found that the amount of data between downlink and uplink is unequal , and the former one has a larger amount than the latter one
针对3g系统中不对称的上下行传输,下行链路业务量普遍大于上行链路业务量这一典型特征, 3gpp在release5协议版本中提出了hsdpa概念,旨在提高某一时刻的传输速率。 - In this paper , after introduction of the code division multiple access ( cdma ) and orthogonal multicarrier ( mc ) technique , the system model of mc - cdma is analyzed and the bit error rate ( ber ) performance in downlink and uplink channel is shown in awgn channel by computer simulation
本文在码分多址技术和正交多载波技术原理基础上,分析了高斯白噪声信道中多载波码分多址( mc - cdma )系统的数学模型,并且使用不同的扩展码对下行信道和上行信道误码率性能分别作了计算机仿真分析。 - Hsupa ( high speed uplink packet access ) is the new technique of r6 , first in this thesis , the hsupa physical layer is introduced in detail . then base on the physical layer technique characteristic , according to the 3gpp simulation requirements and system simulation requirements , the hsupa downlink and uplink can be constructed by using matlab . then the data channel and control channel can be simulated , so the channels performance can be realized , provide the results can be provided to the system simulation , these ground the future practical applications
Hsupa ( highspeeduplinkpacketaccess ) ? ?高速上行分组接入就是r6版本中的新技术,本文首先详细介绍了hsupa物理层的技术特征,然后以其技术特点为依据,按照3gpp的仿真需求和系统级的仿真需求,使用matlab构建hsupa的上下行物理层链路,对其数据信道和控制信道进行仿真验证,从而了解信道的性能,为系统仿真提供仿真数据,为以后的实际应用打下基础,达到预研的目的。