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let载波聚合什么意思

更新时间: 2026-05-05 00:52:20

let载波聚合什么意思

载波聚合是LTE-A中的关键技术。

1、为了满足单用户峰值速率和系统容量提升的要求,一种最直接的办法就是增加系统传输带宽。因此LTE-Advanced系统引入一项增加传输带宽的技术,也就是CA(Carrier Aggregation,载波聚合)。

2、CA技术可以将2~5个LTE成员载波(ComponentCarrier,CC)聚合在一起,实现最大100MHz的传输带宽,有效提高了上下行传输速率。终端根据自己的能力大小决定最多可以同时利用几个载波进行上下行传输。

3、CA功能可以支持连续或非连续载波聚合,每个载波最大可以使用的资源是110个RB。每个用户在每个载波上使用独立的HARQ实体,每个传输块只能映射到特定的一个载波上。每个载波上面的PDCCH信道相互独立,可以重用R8版本的设计,使用每个载波的PDCCH为每个载波的PDSCH和PUSCH信道分配资源。也可以使用CIF域利用一个载波上的PDCCH信道调度多个载波的上下行资源分配。

4、全球不同区域的运营商会有不同的LTE频谱分配,因此也就有不同的载波聚合的频段组合需求。目前在3GPPRAN4小组中有非常多的载波聚合频段组合正在讨论,主要是确定为满足不同CA频段组合工作时基站和终端需要达到的射频指标。

let组成的短语

1、let alone 不管,不打扰;

2、let drive at 对准打;

3、let drop 使跌下,丢下;

4、let fly 发射,猛烈,攻击;

5、let go 放开,释放,发射;

6、let in 放进,嵌入;

7、let into 使知道;

8、let loose 释放,放出,放任;

9、let off 放出,饶恕;

10、let on 透露,假装。

lets和let有什么区别

lets和let的区别是在句子中的使用方法和意义不同,在lets句型中,反意疑问部分要用shallwe或shan'twe,表示建议;而在let句型中,反意疑问部分要用”will/won'tyou”,表示请求。区别是指两个或两个以上的事物间的不同,当两种相似的事物作比较时,它们的不同点便是区别;而且区别有区分、辨别、差别、不同的意思。

let是什么意思

1、let:英[let]美[let]。

Let,英语单词,及物动词、不及物动词、名词,作及物动词时意为“允许,让;出租;假设;妨碍”,作不及物动词时意为“出租;被承包”,作名词时意为“障碍;出租屋,人名;(缅)莱;(俄)莱特”。

2、let可用作不及物动词,也可用作及物动词。用作及物动词作“出租”解时,可接名词或代词作宾语,也可接双宾语,其间接宾语可以转化为介词to的宾语;作“让,使”解时,通常接以形容词或不带to的动词不定式充当补足语的复合宾语;接动词不定式作宾语补足语时,如用于被动结构,to须保留。let还可接不带to的动词不定式作宾语,这时主要用于某些固定搭配中。

let

1、歌词:

Verse:)

The snow glows white on the mountain tonight

Not a footprint to be seen

A kingdom of isolation

And it looks like Im the Queen

The wind is howling like this swirling storm inside

Couldnt keep it in, heaven knows Ive tried

Dont let them in, dont let them see

Be the good girl you always have to be

Conceal, dont feel, dont let them know

Well, now they know

(Chorus:)

Let it go, let it go

Cant hold it back anymore

Let it go, let it go

Turn away and slam the door

I dont care what theyre going to say

Let the storm rage on

The cold never bothered me anyway

Let it go, let it go

Cant hold it back anymore

Let it go, let it go

Turn my back and slam the door

And here I stand

And here Ill stay

Let it go, let it go

The cold never bothered me anyway

(Verse:)

Its funny how some distance makes everything seem small

And the fears that once controlled me cant get to me at all

Its time to see what I can do

To test the limits and break through

No right, no wrong, no rules for me

Im free

Up here in the cold thin air where I finally can breathe

I know I left a life behind but Im too relieved to grieve

(Chorus:)

Let it go, let it go

I am one with the wind and sky

Let it go, let it go

Youll never see me cry

Here I stand and here Ill stay

Let the storm rage on

Let it go, let it go

Cant hold it back anymore

Let it go, let it go,

Turn my back and slam the door

And here I stand

And here Ill stay

Let it go, let it go

The cold never bothered me anyway

(Chorus:)

My power flurries through the air into the ground

My soul is spiraling in frozen fractals all around

And one thought crystallizes like an ice blast

Im never going back, the past is in the past

Standing - frozen in the life Ive chosen

You wont find me, the past is still behind me

Buried in the snow

(Chorus:)

Let it go, let it go

And Ill rise like the break of dawn

Let it go, let it go

That perfect girl is gone

Here I stand in the light of day

Let the storm rage on

The cold never bothered me anyway

Let it go, let it go

Cant hold it back anymore

Let it go, let it go

Turn my back and slam the door

And here I stand

And here Ill stay

Let it go, let it go

The cold never bothered me anyway

Let it go, let it go, and here I stand

let it go, let it go. Let it go

2、《Let It Go》是华特迪士尼动画工作室的2013年动画电影《冰雪奇缘》的主题曲,由克里斯汀·安德森-洛佩兹和罗伯特·洛佩兹作曲作词。在电影冰雪奇缘中,伊迪娜·门泽尔为主角艾莎配音并配唱,而收录于《冰雪奇缘》官方音乐带里是迪斯尼歌手黛米·洛瓦托版的《Let It Go》。


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