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- Transmission Capacity of Wireless Ad Hoc Networks With Successive Interference Cancellation
- The transmission capacity of a wireless ad hoc network can be defined as the maximum allowable area spectral efficiency such that the outage probability does not exceed some specified threshold. This paper studies the improvement in transmission capacity obtainable with successive interference cancellation SIC, an important receiver technique that has...
- Tags: Transmission Capacity, Wi-Fi, Wireless, Networking
- White papers 2005-08-19
- Efficient Interference-Aware TDMA Link Scheduling for Static Wireless Networks
- This paper studies efficient link scheduling for a multihop wireless network to maximize its throughput. Efficient link scheduling can greatly reduce the interference effect of close-by transmissions. Unlike the previous studies that often assume a unit disk graph model, the paper assumes that different terminals could have different transmission ranges...
- Tags: Aware, Network, TDMA, Interference, Association For Computing Machinery, Wireless Network, Cellular Phones, Wi-Fi, Wireless, Networking, Consumer Electronics, Personal Technology
- White papers 2006-09-26
- Cooperation, Competition and Cognition in Wireless Networks
- Nodes and/or clusters of a wireless network operating on the same frequency can operate using three different paradigms: Competition: traditionally, this is information theoretically casted in the framework of interference channels. Cooperation: silent transmitters/receivers can help active transmitters/receivers in the transmission/reception of their messages, but have to extract this message...
- Tags: Network, Harvard University, Wireless Network, Wi-Fi, Wireless
- White papers 2005-10-28
- How to Outperform IEEE 802.11: Interference Aware (IA) MAC
- Wireless networks are nowadays very popular. They are mostly based on IEEE 802.11 protocol which is known to show low performance in ad hoc networks. Also when infrastructured networks many access points are placed are considered, a single transmission could block many radio cells. This paper proposes Interference Aware IA...
- Tags: IEEE 802.11, Network, Transmission, University Of California, Idea, Wireless LANs, Wi-Fi, Wireless, Networking
- White papers
- Adaptive Joint Interference Cancellation and Space-Time Block Decoding for IEEE 802.11b WLAN Systems
- Digital transmission in Wireless Local Area Networks WLANs according to the IEEE 802.11b standard suffers from fading, InterSymbol Interference ISI, and Co-Channel Interference CCI. In this paper, receivers with Joint Interference Cancellation and time reversal Space-Time block Decoding JICSTD are proposed for an enhanced version of the IEEE 802.11b WLAN...
- Tags: IEEE 802.11, University Of British Columbia, Wireless LANs, Wi-Fi, Wireless, LANs, Networking
- White papers 2006-04-03
- Call drop reasons in GSM network
- Heycan anyone please tell me in detail about the possible reasons for call drop in GSM network.Call drop reasonsCall drops in GSM network can be caused by the following:i) Equipment: GSM radios/Combiners can be a cause of this, solution to this is replacement of the unit. A Mobile Stationphone can...
- Tags: VSWR, GSM Network, telecom, gsm, ravinder.529@..., networking
- Discussion threads 2006-09-05
- Interference Avoidance Dynamic Adaptive OFDM Using a Reconfigurable Radio Platform
- This paper presents an advanced wireless communications system using an enhanced version of Orthogonal Frequency Division Multiplexing OFDM/Adaptive OFDM OFDMA called Dynamic Adaptive OFDM DAOFDM. The main focus of this work is the creation of a receiver-centric improved OFDM wireless transmission system that has reduced Bit Error Rate BER and...
- Tags: Radio, OFDM, Wi-Fi, Wireless
- White papers 2006-06-15
- Exploring the Effect of Inter-Flow Interference on TCP Performance in MANETs
- Research efforts in MANETs have concentrated on smoothing TCP incompatibilities with the IEEE 802.11 protocol due to the degrading effects of hidden terminals caused by transmission interference. Previous studies which have focused on solutions at the transport layer, have analysed the behaviour of single or isolated TCP flows and thus...
- Tags: Interference, TCP, Tcp/Ip, Networking
- White papers 2007-01-01
- Modeling and Simulation of IEEE 802.11 Wireless-LAN and Bluetooth Piconet Range Interference
- The proximity of wireless devices with one another often results in interference in the unlicensed 2.4 GHz ISM bandwidth. Interference has been recognized as a major problem to wireless network performance and improvement. This paper reports a proposed and investigated Interference Range Model IRM, a model that allows a user...
- Tags: IEEE 802.11, Interference, Modeling, Wi-Fi, Performance Management, Research & Development, Wireless, Wireless LANs, Bluetooth, Human Resources, Workforce Management, Business Operations
- White papers 2004-09-20
- RF Interference in Home Networks
- Interference can lead to performance reduction of wireless devices. This paper points out the different types of interference on a Bluetooth device and introduces a possible solution to prevent interference. The new solution is a software implementation which requires no hardware adjustments. After simulation some points of improvements are found...
- Tags: Solution, Network, Home Network, Interference, Performance Management, Wi-Fi, Wireless, Human Resources, Workforce Management
- White papers 2005-06-01
- Distributed Cognitive Coexistence of 802.15.4 With 802.11
- Thanks to recent advances in wireless technology, a broad range of standards are currently emerging. Interoperability and coexistence between these heterogeneous networks are becoming key issues, which require new adaptation strategies to avoid harmful interference. This paper focuses on the coexistence of 802.11 Wireless LAN and 802.15.4 sensor networks in...
- Tags: IEEE 802.11, Network, University Of California, Wireless LANs, Wi-Fi, Wireless
- White papers 2006-03-17
- Evaluating Interference in Wireless LANs: Recommend Practice
- Radio interference remains a core concern among Wireless LAN WLAN users, network administrators, and operations staff alike. After all, the potential for interference is a fact of life in the unlicensed bands where WLANs operate, and, even worse, it is often very difficult to evaluate the effects of interference on...
- Tags: Interference, WLAN, Wireless LANs, LANs, Wi-Fi, Wireless, Networking
- White papers 2006-09-01
- The Effects of Interference on Video Over Wi-Fi
- Video transmission over Wi-Fi is becoming more important, in the residence for reasons of convenience, reduced installation expense, and mobility, and in the enterprise as video sees greater application in Webinars, corporate information distribution, and other possibilities. Video represents, however, perhaps the greatest challenge to performance on LANs of any...
- Tags: Farpoint Group, Video, Wi-Fi, Corporate Communications, Wireless LANs, Wireless, Marketing
- White papers 2007-01-01
- Dimensioning of Wireless Mesh Networks With Flow-Level QoS Requirements
- This paper studies dimensioning of wireless mesh networks with elastic traffic subject to flow-level performance constraints. The objective of the dimensioning is to provide order-of-magnitude estimates of the required transmission resources in the network. The results can be used to evaluate the feasibility and sensitivity of a given network scenario,...
- Tags: Network, Association For Computing Machinery, Mesh Networking, Networking, Wi-Fi, Wireless
- White papers 2006-10-06
- RF interference: Just how important are antennas
- Being able to co-locate multiple RF systems within millimeters of each other in modern wireless devices is in large part due to reducing RF interference. Many of these "interference-busting" innovations are the result of engineers making improvements to antenna systems. by Michael Kassner
- Tags: Radio Frequency, Radio, Antenna, Radio Frequency Isolation, Ruckus Wireless, Q, Equipment Developer, Advertising & Promotion, Network Technology, Marketing, Networking, Michael Kassner
- Blog posts 2008-06-15
- Group OFDM Technique for Beyond 3G
- MIMO and OFDM are considered as the dominant techniques for future wireless communication. However, there are still unsolved problem for multiuser case, especially in publice large coverage cellular system. This paper addresses some key techniques suitable for high efficiency downlink transmission in cellular environment, which is involved in FuTURE project....
- Tags: Technique, Tsinghua University, OFDM, Productivity, 3G, Performance Management, Wireless, Cellular Phones, Consumer Electronics, Personal Technology, Human Resources, Workforce Management
- White papers 2005-10-01
- Blind and Semiblind Spatio-Temporal Diversity for OFDM Systems
- Adaptive antenna arrays can be used to improve the performance of Orthogonal Frequency Division Multiplexing systems. They are usually applied in the frequency domain, after the FFT demodulation. In this paper, the selected algorithms are applied in time domain. A blind method is firstly proposed for the maximization of the...
- Tags: Algorithm, Method, Domain, OFDM, Engineering, Wireless
- White papers
- The Invisible Threat: Interference and Wireless LANs
- Interference is a fact of life in the unlicensed bands used by Wireless LANs WLANs, and is an increasing challenge in all WLAN environments - the enterprise, outdoors (including metro-scale Wi-Fi meshes), and in the residence. As the number of unlicensed devices grows and as ever more mission-critical applications are...
- Tags: Interference, WLAN, Wireless LANs, LANs, Wi-Fi, Wireless, Networking
- White papers 2006-10-01
- PAPR Reduction in OFDM Systems Using Constellation Shaping
- Orthogonal Frequency Division Multiplexing OFDM is a multicarrier transmission technique, which is widely adopted in different communication applications. OFDM prevents Inter Symbol Interference ISI by inserting a guard interval and mitigates the frequency selectivity of a multi-path channel by using a simple equalizer. This simplifies the design of the receiver...
- Tags: OFDM, Wireless
- White papers
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