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Point-to-Point Transmission Over MIMO Channels With Intersymbol Interference: Comparison Of Single- And Multicarrier Modulation
White Papers In MIMO orthogonal frequency division multiplexing, temporal equalization is performed by applying OFDM, which decomposes the MIMO ISI channel into a set of independent flat fading MIMO channels. For each of this parallel channels (the carriers...
[March 30, 2005, 0:00]
Transmission Capacity Of Wireless Ad Hoc Networks With Successive Interference Cancellation
White Papers This paper studies the improvement in transmission capacity obtainable with successive interference cancellation (SIC), an important receiver technique that has been shown to achieve the capacity of several classes of multiuser channels, but has...
[October 11, 2005, 0:00]
Efficient Interference-Aware TDMA Link Scheduling For Static Wireless Networks
White Papers Unlike the previous studies that often assume a unit disk graph model, the paper assumes that different terminals could have different transmission ranges and different interference ranges. In the model, it is also possible that a communication...
[August 10, 2007, 0:00]
Cooperation, Competition And Cognition In Wireless Networks
White Papers Cooperation: silent transmitters/receivers can help active transmitters/receivers in the transmission/reception of their messages, but have to extract this message from the underlying transmission or by other methods, and Cognitive Radio...
[August 13, 2007, 0:00]
Drowning In Wireless Spaghetti
News Each decision affects a number of factors: power consumption, how many transmitters can operate in a particular area, how far the transmission reaches, how resistant a signal is to interference, how much data can be carried, how easy it is to...
[November 1, 2005, 12:00]
Experimental Assessment Of Media Synchronization Quality In IEEE 802.11b Under Bluetooth Interference
White Papers This paper assesses the media synchronization quality of audio-video transmission over the IEEE 802.11b wireless LAN under Bluetooth interference by experiment. In this situation, the temporal constraints of audio and video may be disturbed, since...
[November 22, 2005, 23:00]
A Practical Cross-Layer Mechanism For Fairness In 802.11 Networks
White Papers Since wireless networks are more sensitive to variations in bandwidth and environmental interference than wired networks, most networks support a number of transmission rates that have different error and bandwidth properties.
[May 12, 2006, 0:00]
Asymptotic Performance Analysis For Redundant Block Precoded OFDM Systems With MMSE Equalization
White Papers A multi-carrier OFDM system using a Cyclic Prefix for preventing inter-block interference is known to be equivalent to multiple flat fading parallel transmission channels in the frequency domain. Linear Precoding consists in multiplying by a N x K...
[July 26, 2005, 0:00]
An Alternative Metric For Channel Estimation With Applications In Bluetooth Scheduling
White Papers That is why the use of strategies that minimize transmission on channels with great interference or severe fading is so important. Once Wireless Local Networks (WLAN) and Bluetooth devices share the same frequency band (ISM) there is a potential...
[September 14, 2005, 0:00]
PAPR Reduction In OFDM Systems Using Constellation Shaping
White Papers 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. Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier...
[July 24, 2007, 0:00]
PAPR Reduction Using Integer Structures In OFDM Systems
White Papers 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. Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier...
[October 28, 2004, 0:00]
A Networking Perspective Of Mobile Parallel Relays
White Papers The traditional relaying strategy is serial where data packets hop from a single node to another, and the nodes neighboring a transmitting node or a receiving node are suppressed from transmission to avoid radio interference.
[August 1, 2007, 0:00]
Low-Complexity Time-Domain ICI Equalization For OFDM Communications Over Rapidly Varying Channels
White Papers Here, InterCarrier Interference (ICI) is the major source of impairment that limits the transmission quality. This paper considers wireless OFDM communications over rapidly varying channels as occurring e.g.in high-mobility scenarios.
[April 11, 2007, 0:00]
A Systematic Approach To Peak-to-Average Power Ratio In OFDM
White Papers OFDM multicarrier systems support high data rate wireless transmission using orthogonal frequency channels, and require no extensive equalization, yet offer excellent immunity against fading and inter-symbol interference.
[March 30, 2005, 0:00]
Algorithms For Interference Sensing In Optical CDMA Networks
White Papers Interference Sensing is a media access architecture where nodes on the network sense the amount of interference on the line before transmission. Optical CDMA systems have low throughput under moderate to heavy offered load due to interference...
[July 25, 2004, 0:00]
Bluetooth Adaptive Techniques To Mitigate Interference
White Papers The paper presents the details of an AFH algorithm and compared its performance to BIAS, a delay transmission method aimed at interference mitigation. Both, the IEEE 802.15.2 Coexistence Task Group and the Bluetooth Special Interest Group (SIG) are...
[August 9, 2005, 0:00]
Soft Capacity Analysis Of TDMA Systems With Slow-Frequency Hopping And Multiple-Beam Smart Antennas
White Papers Then, the interference reduction due to smart antennas, power control, and discontinuous transmission can be directly translated into capacity gain. Smart antenna is considered as one of the most effective means for enhancing wireless system capacity.
[July 29, 2004, 0:00]
The Need For Cross-Layer Service Discovery In MANETs
White Papers Because of the broadcast nature of wireless transmission, good service selection groups clients with nearby service providers, localizing communication, which in turn reduces inter-node interference and allows for multiple concurrent transmissions...
[September 15, 2005, 0:00]
CDMA-Based MAC Protocol For Wireless Ad Hoc Networks
White Papers By properly estimating the required transmission power for data packets, the proposed protocol allows for interference-limited simultaneous transmissions to take place in the neighborhood of a receiving terminal.
[August 1, 2004, 0:00]
How Optimal Are Wireless Scheduling Protocols?
White Papers In wireless networks mutual interference impairs the quality of received signals and might even prevent the correct reception of messages. It is therefore of paramount importance to dispose of power control and scheduling algorithms, coordinating...
[May 23, 2007, 0:00]
