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Interference Aware Bluetooth Packet Scheduling
White Papers Since both Bluetooth and IEEE 802.11 devices use the same frequency band and may likely come together in a laptop or may be close together at a desktop, interference may lead to significant performance degradation.
[November 11, 2005, 0:00]
Interference Avoidance and Power Control for Uplink CDMA Systems
White Papers This paper presents an algorithm for joint codeword adaptation and power control in which users in a CDMA system so as to achieve a specified set of target signal-to interference plus-noise ratios (SINR).
[July 24, 2004, 0:00]
Interference Cancellation for Cellular Systems: A Contemporary Overview
White Papers Despite the enormous amount of academic and industrial research in the past 20 years on interference-aware receivers and the large performance improvements promised by these multi-user techniques, today's receivers still generally treat...
[October 11, 2005, 3:00]
Interference in the 2.4 GHz ISM Band: Impact on the Bluetooth Access Control Performance
White Papers The analytical results are validated using detailed simulation models for an interference scenario consisting of Bluetooth and WLAN devices. Bluetooth is a radio technology operating in the 2.4 GHz ISM frequency band, that is emerging as a low...
[November 18, 2005, 0:00]
Interference-Aware Channel Assignment in Multi-Radio Wireless Mesh Networks
White Papers The resulting increase in interference can adversely affect performance. This paper presents an interference-aware channel assignment algorithm and protocol for multi-radio wireless mesh networks that address this interference problem.
[August 13, 2007, 15:14]
Interference and Metro-Scale Wi-Fi Mesh Networks
White Papers Farpoint Group has been performing detailed studies of the effects of interference on Wi-Fi-based Wireless LANs (WLANs) for much of the past year. The focus has been on exploring the nature of interference from a variety of angles, and a variety of...
[March 2, 2009, 2:01]
Interference-Aware Topology Control for Wireless Sensor Networks
White Papers However, only a few topology control methods take into account the low interference as a goal of the methods. Some researchers tried to indirectly reduce the interference by reducing the transmission power or by devising low degree topologies, but...
[April 23, 2009, 1:24]
Diversity, Interference Cancellation and Spatial Multiplexing in MIMO Mobile WiMAX Systems
White Papers This paper first discusses the tradeoffs between diversity, interference cancellation and spatial multiplexing in MIMO systems, and it compare Optimum Combining (OC), Maximum-Ratio Combining (MRC) and interference cancellation for different...
[April 23, 2009, 1:24]
Bluetooth Frequency Hop Selection Kernel Impact on "Inter-Piconet" Interference
White Papers This algorithm has been implemented in software to test various aspects of inter-piconet interference. Adjacent channel interference was observed during experimentation. This contradicts previous research, which has assumed that adjacent channel...
[September 15, 2005, 3:00]
Interference Aware Routing in Multi-Radio Wireless Mesh Networks
White Papers This paper addresses the problem of interference aware routing in multi-radio infrastructure mesh networks wherein each mesh node is equipped with multiple radio interfaces and a subset of nodes serve as Internet gateways.
[December 7, 2006, 0:00]
Interference Evaluation of Bluetooth and IEEE 802.11b Systems
White Papers The emergence of several radio technologies, such as Bluetooth and IEEE 802.11, operating in the 2.4 GHz unlicensed ISM frequency band, may lead to signal interference and result in significant performance degradation when devices are collocated...
[November 22, 2005, 0:00]
Interference Considerations for the Time Division Duplex Mode of the UMTS Terrestrial Radio Access
White Papers This paper presents an interference evaluation of the UTRA TDD. This interference can occur between two mobile stations or between two base stations within one carrier or between two operators. The air interface of the Universal Mobile...
[January 20, 2006, 0:01]
Interference-Aware Topology Control and QoS Routing in Multi-Channel Wireless Mesh Networks
White Papers The throughput of wireless networks can be significantly improved by multi-channel communications compared with single-channel communications since the use of multiple channels can reduce interference influence.
[July 14, 2008, 1:21]
Capacity Gains of Single Antenna Interference Cancellation in GSM
White Papers Single Antenna Interference Cancellation (SAIC) is a very interesting and promising technology currently being standardized in 3GPP as part of GERAN Release 6. This interference reduction technique takes advantage of the latest developments in...
[November 29, 2005, 0:00]
Single Antenna Cochannel Interference Cancellation in Asynchronous TDMA Systems
White Papers In this paper, a receiver based on an iterative algorithm for joint channel estimation and cochannel interference cancellation suitable for time-division multiple-access cellular radio systems is proposed.
[June 24, 2009, 13:00]
Modeling and Simulation of IEEE 802.11 Wireless-LAN and Bluetooth Piconet Range Interference
White Papers 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.
[August 11, 2005, 6:00]
Inter-Carrier Interference Cancellation for OFDM Systems
White Papers This frequency offset introduces inter-carrier interference (ICI) in the OFDM symbol. Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multi-carrier modulation scheme, which has been adopted for several wireless standards such as...
[July 27, 2007, 4:39]
Geolocation in Ad Hoc Networks Using DS-CDMA and Generalized Successive Interference Cancellation
White Papers Round-trip Travel Time (RTT) and Angle-Of-Arrival (AOA) measurements are obtained using the generalized successive interference cancellation/matching pursuits (GSIC/MP) algorithm. Channel estimation and distributed positioning algorithms are...
[February 8, 2006, 0:01]
Impact of Interference and Capture Effects in 802.11 Wireless Networks on TCP
White Papers The focus of this paper is on one underlying source of packet erasure (non-congestion loss), namely interference in 802.11 environments (from Bluetooth and co-channel interferers), and the resulting interaction between the MAC and transport layer...
[November 8, 2006, 0:00]
Techniques for Suppression of Intercarrier Interference in OFDM Systems
White Papers The time variations of the channel during one OFDM frame destroy the orthogonality of different subcarriers and results in power leakage among the subcarriers, known as Intercarrier Interference (ICI), which results in a degradation of system...
[July 21, 2005, 6:00]
