Aviso legal: Las operaciones con instrumentos financieros o criptomonedas implican un elevado riesgo, incluyendo la pérdida parcial o total del capital invertido, y pueden no ser adecuadas para todos ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Ebony Howard is a certified public ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Jiwon Ma is a fact checker and research analyst with a background in cybersecurity, ...

* Ex-Date is the date that the stock price is scheduled to adjust on the respective exchange. Cookies are essential for making our site work. By using our site, you consent to the use of these cookies ...

Cookies are essential for making our site work. By using our site, you consent to the use of these cookies. Read our cookie policy to learn more.

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...