Techniques for controlling spectrum usage of a hierarchical communication system
摘要
說明書
Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). It can connect several devices, overcoming problems of synchronization.
The methods and devices described hereinafter may be applied in LTE FDD mode as well as in LTE TDD mode systems, e.g. LTE mode systems having a type 1 LTE frame structure or LTE mode systems having a type 2 LTE frame structure. The type 1 LTE frame includes 10 sub-frames 204 each having two slots 206. A basic type 1 LTE frame has an overall length of 10 milliseconds. The type 2 LTE frame has an overall length of 10 milliseconds. The 10 ms frame comprises two half frames, each 5 ms long.
The methods and devices described hereinafter may be applied in MIMO systems. Multiple-input multiple-output (MIMO) wireless communication systems employ multiple antennas at the transmitter and at the receiver to increase system capacity and to achieve better quality of service. In spatial multiplexing mode, MIMO systems may reach higher peak data rates without increasing the bandwidth of the system by transmitting multiple data streams in parallel in the same frequency band.
