capacity interference
Optimum Power Control for Successive Interference Cancellation With Imperfect Channel Estimation
White Paper Successive interference cancellation, in conjunction with orthogonal convolutional codes, has been shown to approach the Shannon capacity for an additive white Gaussian noise channel. In this paper an optimal power control strategy is derived... [03 Jul 2008]
Intelligent Antennas: Spatial Division Multiple Access
White Paper The combination of the enormous increase in low-cost computing capacity and the development of new algorithms for processing signals from arrays of simple antennas make possible "intelligent antennas" for cellular-like communications systems... [03 Jul 2008]
Delivering Broadband to the Consumer: Ethernet Connectivity Eliminates the User Access Bottleneck
White Paper Even forward-looking technology such as vDSL, broadband wireless and free space optics present problems ranging from environmental interference to inadequate speed. Current xDSL and cable modem services offer a speed improvement over dial-up modems... [03 Jul 2008]
Performance Analysis of OFDM System Based on IEEE 802.11a
White Paper However, ISI (Inter-Symbol Interference), which is the severe problem in the case of the existence of multipath fading, can be occurred more frequently in high-speed multimedia data transmission. Recently, there are increasing demands among... [03 Jul 2008]
Channel-Aware Throughput Fairness in Multi-Cell Wireless LANs
White Paper Channel characteristics in multi-cell IEEE 802.11 wireless LANs are different from those in single-cell environments due to cross-channel interference. The IEEE 802.11 protocol does not have any provisions for rate guarantees in the presence of... [03 Jul 2008]
Implementing Voice Over Wireless Networks: Realities and Challenges
White Paper Making matters worse, Radio Frequency (RF) interference, RF noise, and the physical environment dramatically affect wireless coverage and capacity. Voice over Wireless Fidelity (VoWi-Fi) presents wireless network designers with a difficult... [31 May 2008]
UWB Coexistence and Cognitive Radio: How Multiband-OFDM Leads the Way
White Paper Building on the IEEE 802.15.2 Recommended Practice and the framework developed by IEEE 802.19, researchers are developing techniques to separate UWB signals for others using time, frequency, power, space, and coding, the five techniques available... [11 Apr 2008]
ICI Cancellation Based Channel Estimation for OFDM Systems
White Paper The loss of orthogonality among subcarriers causes inter-carrier interference (ICI), which affects both channel estimation and detection of OFDM data symbols. Channel estimation error degrades the performance of coherent receiver limiting capacity... [11 Apr 2008]
Variable Bit Allocation for FH-CDMA Wireless Communication Systems
White Paper A frequency-hopped code-division multiple-access system can adapt to the different interference levels in hopping patterns and assign the slots different bit rates to increase the system capacity. The algorithms that achieve the most system... [10 Apr 2008]
Soft Capacity Analysis of TDMA Systems With Slow-Frequency Hopping and Multiple-Beam Smart Antennas
White Paper 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. [10 Apr 2008]
A Simple Generalization of the CDMA Reverse Link Pole Capacity Formula
White Paper The generalization quantifies a cost associated with in-cell interference by accounting for the lack of interference from the desired user on the total interference and by considering the impact of the frequency reuse number on the out-of cell... [10 Apr 2008]
Understanding Interference and Carrier Sensing in Wireless Mesh Networks
White Paper The main obstacle in achieving high capacity wireless mesh networks is interference between the mesh links. This paper analyzes the carrier sensing and interference relations between two wireless links and measure the impact of these relations on... [14 Feb 2008]
Radio Network Dimensioning and Planning for WiMAX Networks
White Paper The paper introduces Fujitsu's in-house developed WiMAX Network Dimensioning Tool, which contains innovative algorithms for interference margin calculation and capacity analysis. This paper is a high-level introduction to the complexities involved... [14 Feb 2008]
Vivato Based VoIP
White Paper The introduction of a wireless component adds the additional complications of coverage, coverage quality, wireless network capacity and interference control to the already difficult task of supporting quality voice services using a communications... [05 Dec 2007]
Next Generation Wireless LAN System Design
White Paper This paper proposes a new WLAN design approach that focuses on assuring sufficient data rate capacity to meet expected user demand in the coverage area, while still satisfying signal coverage and interference level requirements. [05 Dec 2007]
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