We show the use of a novel, high-level FPGA-based cognitive radio framework in implementing a demonstration of video transmission over a frequency-agile radio link. The demo uses spectrum sensing to detect the transmission frequency and adapts the forward error correction scheme to the channel conditions autonomously.

In this paper, we carry out a simulation of a Radio over Fiber (RoF) link with VPI Transmission Maker, and Rohde&Schwarz (R&S) equipments. The VPI simulations perform optical path degradations for multiple radio modulation formats without using any specific radio numerical tools, while a Generator and a Vector Analyser are used for radio generation and reception.

This document describes the transmission of IPv4 over Ethernet, as well as IPv6 over Ethernet, in an access network deploying the IEEE 802.16 cellular radio transmission technology. The Ethernet on top of IEEE 802.16 is realized by bridging connections that IEEE 802.16 provides between a base station and its associated subscriber stations. Due to the resource constraints of radio transmission s...

This paper investigates point-to-multipoint (PTM) transmission supporting adaptive modulation and coding (AMC) as well as retransmissions based on incremental redundancy. In contrast to the classical PTM transmission which was introduced by the Multimedia Broadcast Multicast Service (MBMS), the adaptiveness requires user individual feedback channels that allow the receivers to report their radi...

To fully utilize the diversity of multi-radio, a new parallel transmission method for wireless mesh network is proposed. Compared with conventional packet transmission which follows “one flow on one radio”, it uses the radio diversity to transmit the packets on different radios simultaneously. Three components are presented to achieve parallel-transmission, which are control module, selection m...

Due to advances in silicon manufacturing technology, Radio Frequency Identification (RFID) systems are useful in many applications such as automobile immobilizers, animal tracking, payment systems, automatic toll collection and inventory management. As RFID systems use both radio and wire communication, security issues become a critical concern. However, even if security and privacy solutions h...

The mobile communication is nowadays one of the basic needs of humanity. It is essential to the flourishing of human beings. Considering this reality, the need to use its mobile phone is become more important and diversified. The subscribers of the various mobile telephone operators are increasingly demanding. This situation poses the problems of the cover mobile network to the operators and le...

In this paper, we propose new channel access mechanism for effective transmission of signal and data in IMT2000 W-CDMA system proposed by NTT DoCoMo. In proposed mechanism, base station broadcasts channel status information to prevent mobile station . from unnecessary transmission collision. That is, proposed mechanism uses competition mechanism for the transmission of first radio frame and uti...

Sensing and Transmission Strategies in Wireless Cognitive Radio Systems by Babak Abbasi Bastami The main challenge in any cognitive radio system is to maximize secondary users throughput while limiting interference imposed on licensed users. In this regard, finding the optimal sensing and transmission timing strategies and accurate sensing techniques are of great importance in a cognitive radio...