This post covers Mobile and Wireless Networks by Khaldoun Al Agh, Guy Pujolle, and Tara Ali-Yahiya.

Basic Ideas

• The 5G - Fundamental System Design

  • 5G frequencies

    

  • Debates are required to determine the full potential of this technology. The easiest solution is to find frequencies not yet used. Unfortunately, this is almost impossible below 20 GHz so the basic idea is to use very high frequencies in the millimetric bands to provide huge bandwidths.

  • These bands are not easy to use since they have very strong attenuation due to obstacles such as dust or rain. Figure 5.5 shows the attenuations depending on the frequency.

  • The new bands for 5G could be 27,500 to 28,350 and 37,000 to 40,000 and 73,000 to 80,000 MHz. These bands give global capacity if we can use them effectively. It is necessary to develop accurate beamforming technologies at these frequencies, i.e. get directional signals to reach terminals with high accuracy.