Traditional WiFi devices, wireless energy harvesting sensor-driven smart gadgets, and backscatter communication tags can all be part of a heterogeneous network. In the Internet Things (IoT), recently developed technology allows for battery-free communication. However, when transmissions coexist alongside data transmissions, collisions interference become more frequent. this paper, we present Io...

The 4G or Beyond 3G wireless networks is consist of IP-based heterogeneous access networks from 3G cellular, WiFi, WiMAX to other emerging access technologies such as mesh networks. The key objective of designing the next generation wireless networks is to support of mobile subscribers. To support the mobile host in the hybrid wireless access technologies, many solutions based on network protoc...

Orthogonal Frequency-Division Multiplexing (OFDM) has become the preferred modulation scheme for both broadband and high bitrate digital wireless protocols because of its spectral efficiency and robustness against multipath interference. Although the components and overall structure of different OFDM protocols are functionally similar, the characteristics of the environment for which a wireless...

Metropolitan WiFi positioning is widely used to complement GPS on mobile devices. WiFi positioning typically has very fast time-to-first-fix and can provide reliable location information when GPS signals are too weak for a position fix. Several commercial WiFi positioning systems have been developed in recent years and most newer model smart phones have the technology embedded. This study empir...

Nowadays, most of the automatized measurement processes are carried out by VISA (Virtual Instrument Software Architecture) compatible instruments, that execute instructions provided a host computer connected through wired standard buses, as USB (Universal Serial Bus), GPIB (General-Purpose Instrumentation PXI (PCI eXtensions for Instrumentation) or Ethernet. To overcome intrinsic limitations as...

Wireless communication platforms in small enclosures are susceptible to in-device RF interference. Difficult interference cases emerge in the next-generation 4G smartphones using certain LTE bands, and support in MAC and higher protocol layers is required for efficient interference avoidance. Interference and the avoidance mechanisms create coupling between the radios complicating the interacti...

To provide wireless Internet access, WiFi networks have been deployed in many regions such as buildings and campuses. However, WiFi networks are still insufficient to support ubiquitous wireless service due to their narrow coverage. One possibility to resolve this deficiency is to integrate WiFi networks with the wide-range WiMAX networks. Under such an integrated WiMAX and WiFi network, how to...

With the prompt development in wireless communication, addition to evolution of patient monitoring system, and reduce death a big number patients who endear as result heart failure or sudden high temperature children. This paper proposed sophisticated method observation human body parameters like measurements with employ at NodeMcu ESP8266 unit Internet Things (IoT). prototype is based on modul...

Terahertz (THz) communication is envisioned as one of the key technologies to satisfy the increasing demand for higher-speed wireless communication networks. The very high path loss at THz frequencies and the power limitations of THz transceivers limit the communication distance in THz networks. Beamforming directional antennas are needed simultaneously in transmission and in reception to commu...