Next Generation Communications

Specific Topics on Next Generation Communications

• 1. 5G 6G Communication Technology

  2. Modulation: OFDM, MIMO, Massive MIMO

• Basic of MIMO: Internet Link (Properties, History, References)

• Basic of Massive MIMO: Internet Link (Properties, History, References)

• Conventional Cellular Massive MIMO System with Four Cell

• Research Trends of Conventional Massive MIMO Systems

  1. • Most massive MIMO research has focused on improving channel quality, sum SE or fairness between users.

     • None of these works demonstrates action regarding an efficient way to spend the power resource.

• Recent Result of CIT Lab. for Massive MIMO Systems

  1. • Based on general definition of system energy efficiency (EE), we propose a formulation representing EE of a cellular massive MIMO system.

     • After that, this EE formulation is used to form a maximization problem with constraints of minimum user rate for every user in the system, and limited power used for pilot, data signals.

     • The minimum user rate means that we guarantee a certain quality for user communication along with an efficient power consumption.

     • Two iterative algorithms are proposed to solve the aforementioned EE maximization problem.

• Performance Results of the Proposed Massive MIMO Systems

  1. • System power summation

• 1. • System sum rate