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 TitleDate AddedCompany
whitepaper Principles of MIMO-OFDM Wireless Systems0000-00-00 ETH Zurich
  The use of multiple antennas at both ends of a wireless link (MIMO technology) holds the potential to drastically improve the spectral efficiency and link reliability in future wireless communications systems. A particularly promising candidate for next-generation fixed and mobile wireless systems is the combination of MIMO technology with Orthogonal Frequency Division Multiplexing (OFDM). This paper provides an overview of the basic principles of MIMO-OFDM.

Tags: Components, Mobile and Wireless		   
whitepaper Interpolation-Based Efficient Matrix Inversion for MIMO-OFDM Receivers2004-12-08 ETH Zurich
  This paper proposes a new class of computationally efficient algorithms for inverting the channel matrices in zero-forcing MIMO-OFDM receivers. Depending on the number of channel taps and the number of antennas, significant complexity reductions can be realized. For the parameter settings used in the IEEE 802.16 standard, savings of up to 80% over brute-force tone-by-tone inversion can be obtained.

Tags: Components, 		  
whitepaper A Fourth-Generation MIMO-OFDM Broadband Wireless System: Design, Performance, and Field Trial Results2002-09-01 Institute of Electrical and Electronics Engineers
  Increasing demand for high-performance 4G broadband wireless is enabled by the use of multiple antennas at both base station and subscriber ends. Multiple antenna technologies enable high capacities suited for Internet and multimedia services, and also dramatically increase range and reliability. This paper describes a multiple-input multiple-output OFDM wireless communication system, lab test results, and recent field test results obtained in San Jose, California.

Tags: Mobile and Wireless, Components, 		  
whitepaper Throughput of a MIMO OFDM Based WLAN System2004-09-29 Technical University of Eindhoven
  In this paper, the system throughput of a wireless local-area-network (WLAN) based on multiple-input multiple-output orthogonal frequency division multiplexing (MIMO OFDM) is studied. A broadband channel model is derived from indoor channel measurements. This model is used in simulations to evaluate the performance of different MIMO detection algorithms. It is concluded that a MIMO scheme combined with an additional antenna at the receiver side and the low computational complex minimum-mean-squared-error (MMSE) algorithm is preferable.

Tags: Components, Mobile and Wireless		   
whitepaper Adaptive MIMO OFDM Receivers: Implementation Impairments and Complexity Issues2004-08-01 University of California
  MIMO OFDM communications is a promising choice for future high data rate wireless systems. However, the commercial deployment of MIMO OFDM systems faces some challenges, including those arising from front-end analog implementation impairments and complex receiver structures. The impairments are caused by the analog processing of the received radio frequency (RF) signal and they cannot be efficiently or entirely eliminated in the analog domain. This paper illustrates the effect of In-phase and Quadrature-phase (IQ) imbalances on system performance.

Tags: Mobile and Wireless, Mobile and Wireless		   
whitepaper Powerline Communications Technology - Residential Versus Commercial2004-05-01 Telkonet
  The Telkonet PlugPlus system is a robust system for commercial applications, scalable to hundreds of users. It is intended for large installations, such as hotels and apartment complexes, that demand a high degree of reliability and service-management features. The Telkonet PlugPlus solution has a substantially different architecture from the residential powerline communications (PLC) solution, which is intended primarily for the single family residential market and where small peer-to-peer networks are the norm.

Tags: Mobile and Wireless, Components, 		  
whitepaper Case Study: NLOS Broadband Wireless Deployment for Small Town / Rural Markets0000-00-00 NextNet Wireless
  This case study shows how a non-line of sight (NLOS) broadband wireless Internet access system successfully serves a small town/rural market. NextNet's Expedience NLOS system is deployed in six rural Iowa locations, including Pocahontas, LeMars, Kingsley, Sheldon, Holstein and Ida Grove, IA. These rural towns range in population from 1,245 to 9,237 residents. This case study focuses on the Kingsley NLOS deployment. The case study describes the NextNet Expedience OFDM system commercially deployed in Kingsley, Iowa. One RF base station with a simple antenna installation provides RF coverage for indoor plug-and-play self-install customers in the town and surrounding rural area.

Tags: Mobile and Wireless, Components, 		  
whitepaper Optimized ADSL Performance2004-05-10 Allied Telesis
  In the design of a production video over ADSL delivery network, each piece of the end to end system must be considered in order to maximize bandwidth, minimize error rates, and enhance robustness. This white paper describes a set of proven Central Office practices field tested by Allied Telesyn and proven to increase subscriber coverage, service consistency, and ultimately ADSL success.

Tags: Network Management, Network Technologies, 		  
whitepaper Solutions for ADSL Line Interfaces2004-12-03 STMicroelectronics
  Asymmetric Digital Subscriber Line (ADSL) is a modem technology converting existing twisted-pair telephone lines into access paths for multimedia and high-speed data communications. ADSL allows the wide-band access necessary to transmit media such as movies, television, remote CD- ROMs via LANs and the Internet into individual workplaces and homes. After a short overview of ADSL, this paper focuses on implementing line driving solutions.

Tags: Components		   
whitepaper ADSL Around the Home2004-10-01 Solwise
  Even if you only have one computer, and it is near your 'master' socket, you will need to consider ADSL filtering. This is because the ADSL signal shares the same pair of wires from the exchange with your telephone. Unfortunately, if one does not separate the two signals then the phone tends to drain away the ADSL signal. The solution to this problem is called a microfilter or splitter.

Tags: Network Technologies, Components