Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in wireless mesh networks (WMNs). In this paper, we present asynchronous multiple-state based power control for MRMC WMNs. First, WMN is represented as a set of disjoint Unified Channel Graphs (UCGs). Second, each network interface card (NIC) or radio assigned to a unique UCG adjusts transmission power using predicted mu...

Ultra Wide Band technology is rapidly maturing for multiple access communication purposes. By referring to Impulse Radio realization and to the classic link analysis of multicode time-hopping UWB multiple access schemes we focus on distributed algorithms to share the radio resource capacity in an ad-hoc type of network, handling both best effort and QoS requesting traffic flows. A practical sol...

Multiple-input-multiple-output (MIMO) technology uses multiple antennas and advanced signal processing to increase the communication system capacity, reliability data rate without sacrificing energy consumption or RF bandwidth. In some scenarios, MIMO need be designed knowledge of channel state information. One possible solution is differential space–time block coding (DSTBC). Ettus USRPs (Univ...

Equipping mesh nodes with multiple radios that support multiple wireless channels is considered a promising solution to overcome the capacity limitation of single-radio wireless mesh networks. However, careful and intelligent radio resource management is needed to take full advantage of the extra radios on themesh nodes. Flow-radio assignment and channel assignment procedures should obey the ph...

It is envisioned that multiple radios may be integrated into a single portable device in the near future. Such multi-radio devices may participate in multiple networks at the same time. In this paper, we consider a 802.11 WLAN network that shares a common set of multi-radio devices with another network, say CO-NETWORK, and we discuss WiMAX as one example of CONETWORK. One multi-radio device may...

In this paper a multiple input multiple output (MIMO) radio channel measurement system is presented that utilizes several software defined radio (SDR) platforms at the transmitter and at the receiver. The system hardware buildup and its calibration technique are presented. The channel measurement results are afterwards exploited for a special antenna synthesis method that was already proofed by...

background: recent advances in cancer treatment have resulted in an increased number of cancer survivors. fertility might be impaired by cancer itself or through gonadal damage as a consequence of radio-chemotherapy. damages to reproductive organs are seen in minimally upto 30% of cancer patients. the aim of the present study was evaluate the attitude of iranian oncologists toward fertility pre...