This includes packetization, downlink control, multicast, etc.下行链路信号将可在145.800MHz调频收听到。
Downlink signals from the ISS will be audible in Europe on 145.800 MHz FM.G频谱效率30bits/Hz下行链路和15bit/Hz上行链路。
G spectral efficiency 30bits/Hz downlink and 15 bits/Hz uplink.
Downlink power: 0.5 W RF.
Actually, OFDMA is only used for the downlink of LTE.Combinations with other parts of speech
下行链路信号将可在145.800MHz调频收听到。
The downlink signals will be audible in Europe on 145.800 MHz FM.而且,在下行链路方向,双载波操作可与MIMO功能结合,实现高达84.4Mbit/s的数据率。
Additionally, in downlink direction dual carrier operation can be combined with the MIMO feature reaching data rates up to 84.4 Mbit/s.S卩,下行链路发送可以占据与上行链路相同的信道(相同的发送频率),但是发生在不同的时刻。
That is, the down link transmission can occupy the same channel(same transmission frequency) as the up link transmission, but occur at different times.在北美,YouTube占移动下行链路流量的15.29%,仅略微超过Instagram,占14.47%。
In North America, YouTube accounts for 15.29% of mobile downlink traffic, narrowly beating out Instagram, which had 14.47%.下行链路覆盖一个称为“脚印”的覆盖区,它可能非常大或覆盖一个集中的区域。
The downlink covers an area called the"footprint," which may be very large or cover a focused area.这些公司对接近300Mbps的下行链路速度感到兴奋,这将使得无线用户在几秒钟内即可下载完整的一部电影。
The companies are excited about downlink speeds nearing 300 Mbps that would allow wireless users to download full movies in a matter of seconds.Sigfox的缺点是数据发送回传感器/设备(下行链路能力)受到严重限制,信号干扰也可能成为问题。
Sending data back to the sensors/devices(downlink capability) is severely limited and signal interference can become an issue.在下行链路时隙中,该信道估计即被用于计算下行链路信号的预编码器。
In the downlink time slot, this channel estimate is used to compute a precoder for the downlink signals.GPP第8版指定了HSPA+的进一步改进,比如下行链路双载波操作以及MIMO和64QAM调制相结合。
GPP Release 8specifies further improvements for HSPA+ such as downlink dual carrier operation and the combination of MIMO and 64QAM modulation.这些包括更宽的射频带宽、更多的MIMO空间流、下行链路多用户MIMO和高密度调制。
These include a wider RF bandwidth,more MIMO spatial streams, downlink multi-user MIMO and high density modulation.上行链路和下行链路在时间上分开,即一个时间帧内的具体时隙被分别分配给上行链路和下行链路传输。
The uplink and downlink are separated in time, i.e. specific timeslots within one time frame are assigned separately to uplink and downlink transmission.今天,我们还为企业提供运营商服务,亦为电视台提供卫星上行/下行链路服务。
Today, we also provide carrier services for businesses andsatellite up/downlink services for TV broadcasters.为使自适应的数据速率工作,对称的上行链路和下行链路要求有足够的下行链路容量。
In order to make adaptive data rate work,symmetrical up link and down link is required with sufficient downlink capacity.该卫星的额外地面下行链路能力将包括与美国国家航空航天局(美国航天局)的接收协议,可能还有与其他国际地面站之间的接收协议。
Additional ground downlink capacity for NEOSSat is expected to include reception agreements with the National Aeronautics and Space Administration(NASA) and, potentially, other international ground stations.它将信道扩展到160MHz,并增加了更多的MIMO空间流(最多8个)和下行链路多用户MIMO(最多4个客户端)。
It extends the channel with to 160 MHz andadds more MIMO spatial streams(up to eight) and downlink multi-user MIMO(up to four clients).即将发布的版本将提供更高的可靠性和峰值数据速率,达到20千兆位/秒(Gbps)下行链路和10Gbps上行链路。
The upcoming release will deliver highly desirable enhancements, including far greater reliability andpeak data rates of 20 gigabits-per-second(Gbps) downlink and 10 Gbps uplink.监测下行链路载体以提供多普勒信号,将LUT位置作为基准,或者使用已知精确位置的高度稳定的406MHz校准信标更新星历表数据。
The downlink carrier is monitored to provide a Doppler signal using the LUT location as a reference, or highly stable 406 MHz calibration beacons at accurately known locations are used to update the ephemeris data.PACSAT通信储存和转送通信系统(内存13兆,下行链路为9.6千位/秒).
PACSAT Communication store-and-forward communications system(13 Mb RAM,9.6 kbits/s downlink).数据量和最大下行链路速度:数据量为每天461Gb,最大下行速度为每秒100Mb。
Data Volume and Maximum Downlink Rate: The data volume is 461 Gb per day and downlink is 100 Mb per second.图3:TelitLE910LTE第1类模块支持5Mbit/s上行链路中10Mbit/s的下行链路速度。
The Telit LE910 LTE Category 1module supports rates of 10 Mbit/s for the downlink at 5 Mbit/s in the uplink.双下行链路路径能够以最高42Mb/s的数据速率测试DCHSDPA并可测试未来的多路输出技术。
The two downlink paths allow testing of DC-HSDPA at the maximum 42-Mb/sec data rate and support testing of future multiple-output technologies.".它有两种变体:用于增强覆盖的LTE-M/NB-IoT(高达300Kbps下行链路)和用于更高吞吐量的LTECat-4(高达150Mbps下行链路)。
It is available in two variants: LTE-M/NB-IoT(up to 300 kbps downlink) for enhanced coverage and LTE Cat-4(up to 150Mbps downlink) for higher throughput.同时,在密集的城市地区,最小实现的下行链路和上行5G数据速率分别为100Mbps和50Mbps。
Meanwhile, in dense urban areas, the minimum realised downlink and uplink 5G data rates should be 100 Mbps and 50 Mbps respectively.在演示期间,这些公司实现了成功的下行链路和上行链路切换以及1.7Gbps的峰值速度。
During the demonstration, the companies achieved a successful downlink and uplink handover as well as a peak speed of 1.7 Gbps.