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新手都可掌握的蜡烛图分析法

在 IQ Option 上交易三角形模式的指南

各种型号的馈线,塔越高,线越粗

在 IQ Option 上交易三角形模式的指南

Underwriters exercise option in Snap IPO

Global smart TV forecast return to growth in 2022, sustained through 2026

Japan M&A By the Numbers: Q1 2022

Insight Weekly: Private equity slows; SPAC underwriters retreat; carbon capture boost

Insight Weekly: M&A outlook; US community bank margins; green hydrogen players' EU expansion

  • 7 Mar, 2017 | 17:41


Underwriters exercise option in Snap IPO

    在 IQ Option 上交易三角形模式的指南
  • Author Urooj Janjua
  • Theme Technology, Media & Telecom

The underwriters of Snap Inc.'s offering exercised in full their option to purchase an additional 30,000,000 shares of class A common stock from Snap and some of the selling stockholders at $17 per share, less the underwriting discount.

Snap, the parent of ephemeral message service Snapchat, on March 7 closed its IPO at $17 per share. The total offering consisted of 230,000,000 class A shares of Snap, following the exercise in full by 在 IQ Option 上交易三角形模式的指南 the underwriters of their overallotment option.

The company and the selling 在 IQ Option 上交易三角形模式的指南 stockholders raised gross proceeds of $3.91 billion from the offering.

Morgan Stanley, Goldman Sachs & Co., 在 IQ Option 上交易三角形模式的指南 J.P. Morgan, Deutsche Bank Securities, Barclays, Credit Suisse and Allen & Co. LLC acted as book-running managers for the IPO.

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Jarrett Lawfield 在 IQ Option 上交易三角形模式的指南
Land Leveling Contractor in Catron, Missouri, Lawfield Land Leveling

5G基站君的进化之路—eCPRI

基站君一直在默默地为我们服务

奋斗的基站君

二、分布式基站的崛起,CPRI接口的辉煌

2G和3G初期的基站君

1.天线:高高地挂在塔上。它也必须高挂在塔上,这是因为发射信号的需要。

2.机房:在塔下,必然有一个小房子,里面放着基站。

3.基站:就是发射无线信号的设备。基站在逻辑上分为BBU和RRU两部分。RRU负责信号收发,BBU负责信号处理。

4.馈线:连接天线和基站的,就是馈线了,这是一根又粗又硬又重的传输信号的管子。由于铁塔一般情况下有个几十米到100米高,所以这根管子也得几十到100米长。然而信号的传送是有损耗的,馈线越长损耗越大,可能从基站到天线,信号还没发出去就已经损耗掉了一多半。因此塔下的基站必须加大功率发射才能弥补这个损耗。

各种型号的馈线,塔越高,线越粗

5.配套设备。这些设备在图里没有画出,主要包含这些:电源,电池,空调。电源自不用说,基站得有电才能工作;万一停电了咋办?那得有电池撑着;另外,基站,电源,电池,这些设备挤在一个小房子里,不断发热温度升高,为了保证设备正常运行,得有空调降温才行。

分布式基站架构

CPRI

BBU和RRU/AAU之间的接口划分:CPRI

如下图所示,就是最为普通的20MHz带宽的LTE载波,支持2x2MIMO,可支持150Mbps速率的数据流,处理到了CPRI这里,带宽需求竟然达到了惊人的2.5Gbps

CPRI接口的速率要求惊人

在 IQ Option 上交易三角形模式的指南 CPRI选项速率表

光纤

光模块

馈线和光纤的对比

C-RAN架构对于光纤资源的要求很高

三、5G来了,基站君从CPRI到eCPRI的进化

1.在 IQ Option 上交易三角形模式的指南 RRU演变成了集成超大规模天线阵列的Massive MIMO AAU

2.载波带宽大幅扩展,Sub6G载波需要支持100M带宽,而毫米波需要支持400M的载波带宽

3.基站所需承载的数据流量达到了10Gbps的级别

5G对CPRI接口的速率要求

eCPRI的设计思路很简单,既然通信协议栈上传输的数据会层层加码,越到物理层数据量越大,那就如上图所示,把在BBU上处理的数据上移一层(High Phy往上的BBU处理),下面的交给RRU去处理(Low Phy往下的RRU处理),这样BBU和RRU之间的数据量就少了,代价是RRU的复杂度提升。

eCPRI接口的定义

5G的三大场景

在 IQ Option 上交易三角形模式的指南

Underwriters exercise option in Snap IPO

Global smart TV forecast return to growth in 2022, sustained through 2026

Japan M&A By the Numbers: Q1 2022

Insight Weekly: Private equity slows; SPAC underwriters retreat; carbon capture boost

Insight 在 IQ Option 上交易三角形模式的指南 Weekly: M&A outlook; US community bank margins; green hydrogen players' EU expansion

  • 7 Mar, 2017 | 17:41


Underwriters exercise option in Snap IPO

  • Author Urooj Janjua
  • Theme Technology, Media & Telecom

The underwriters of Snap Inc.'s offering exercised in full their option to purchase an additional 30,000,000 shares 在 IQ Option 上交易三角形模式的指南 of class A common stock from Snap and some of the selling stockholders at $17 per share, less the underwriting discount.

Snap, the parent of ephemeral message service 在 IQ Option 上交易三角形模式的指南 Snapchat, on March 7 closed 在 IQ Option 上交易三角形模式的指南 its IPO at $17 per share. The total offering consisted of 230,000,000 class A shares of Snap, following the exercise in full by the underwriters of their overallotment option.

The company and 在 IQ Option 上交易三角形模式的指南 the selling stockholders raised gross proceeds of $3.91 billion from the offering.

Morgan Stanley, Goldman Sachs 在 IQ Option 上交易三角形模式的指南 & Co., J.P. Morgan, Deutsche 在 IQ Option 上交易三角形模式的指南 Bank Securities, Barclays, Credit Suisse and Allen & Co. LLC acted as book-running managers for the IPO.