*11 HSPA : High Speed Packet Access *12 FWA : Fixed Wireless Access *13 WMAN : Wireless Metropolitan Area Network *14 WPAN : Wireless Personal Area Network Figure 1.3 outlines the structure of a mobile phone and its built-in power amplifier. This phone uses two frequency bands, so two power amplifiers are installed. In order to support expanding functionality such as increasing communications capacities and multiple overseas frequencies, some phones are equipped with more than four power ampli Metropolitan Area Network, Personal Area Network, Digital Phone, Communication System, Computer Repair, Power Amplifiers, 4g Lte, High Speed, Mobile Phone
3G Mobile Service Performance: End-to-End QoS concept in 3GPP & 3GPP2