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Implementation of a MIMO OFDM-Based Wireless LAN System
White Paper The combination of multiple-input multiple-output (MIMO) signal processing with orthogonal frequency division multiplexing (OFDM) is regarded as a promising solution for enhancing the data rates of next-generation wireless communication systems... [10 Apr 2008]
Implementation of a MIMO OFDM Based Wireless LAN System
White Paper The combination of Multiple-Input Multiple-Output (MIMO) signal processing with Orthogonal Frequency Division Multiplexing (OFDM) is regarded as a promising solution for enhancing the data rates of next generation wireless communication systems... [10 Apr 2008]
Multimode Precoding for MIMO Wireless Systems
White Paper Multiple-Input Multiple-Output (MIMO) wireless systems obtain large diversity and capacity gains by employing multielement antenna arrays at both the transmitter and receiver. The theoretical performance benefits of MIMO systems, however, are... [31 Aug 2007]
Multimode Precoding for MIMO Wireless Systems
White Paper Multiple-Input Multiple-Output (MIMO) wireless systems obtain large diversity and capacity gains by employing multielement antenna arrays at both the transmitter and receiver. The theoretical performance benefits of MIMO systems, however, are... [10 Aug 2007]
Throughput Enhancement for Wireless Communication Systems Using the Multiple Antenna Technique MIMO
White Paper A promising way to achieve this is the combination of Multiple-Input Multiple-Output (MIMO) signal processing with Orthogonal Frequency Division Multiplexing (OFDM). A test system is built in which the OFDM based Wireless LAN standard IEEE 802.11a... [08 Aug 2007]
A High-Speed Four-Transmitter Four-Receiver MIMO OFDM Testbed: Experimental Results and Analyses
White Paper By adopting Multiple-Input Multiple-Output (MIMO) and Orthogonal Frequency-Division Multiplexing (OFDM) technologies, indoor wireless systems could reach data rates up to several hundreds of Mbits/s and achieve spectral efficiencies of several... [13 Apr 2007]
Multiband-OFDM MIMO Coding Framework for UWB Communication Systems
White Paper In order to satisfy the growing demand for higher data rates, one possible solution is to exploit both spatial and multipath diversities via the use of Multiple-Input Multiple-Output (MIMO) and proper coding techniques. [13 Apr 2007]
Quantized Multi-Mode Precoding for Spatial Multiplexing MIMO-OFDM Systems
White Paper Spatial multiplexing with multi-mode precoding can achieve both high capacity and high reliability in Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems. Bit error rates simulations demonstrate the performance... [11 Apr 2007]
Throughput and Coverage of WLANs Employing STBC Under Different Channel Conditions
White Paper A WLAN physical layer simulator employing STBC and a propagation modelling tool are combined in order to evaluate the coverage and throughput of hot spot WLANs employing STBC for the 2x2 and 4x4 MIMO cases. [09 Feb 2006]
Approaching the Zero-Outage Capacity of MIMO-OFDM Without Water-Filling
White Paper This paper shows that the full-blown water-filling procedure is not necessary to approach the zero-outage capacity of the MIMO-OFDM channel; it is sufficient instead to use a combination of eigenbeamforming and a fixed (nonadaptive) rate allocation. [26 Jul 2005]
Hopping Pilots for Estimation of Frequency-Offset and Multiantenna Channels in MIMO-OFDM
White Paper IEEE802.11a, IEEE802.11g in the U.S.and digital audio/video broadcasting (DAB/DVB), HiperLAN/2 in Europe), because it offers the possibility for high data rates at low decoding complexity. Orthogonal frequency-division multiplexing (OFDM) has been... [26 Jul 2005]
Adaptive Power Loading for Multiple-Input Multiple-Output OFDM Systems With Perfect Channel State Information
White Paper This paper derives a power loading procedure optimizing the bit-error rates of multiple-input multiple-output (MIMO) bit-interleaved coded modulation OFDM systems performing hard-decisions after demodulation and ideal interleaving. [21 Jul 2005]
Development of MIMO OFDM Systems for 5 GHz WLAN in the B4 Broadband radio@hand Project
White Paper Simulations are carried out to give insight in the capacity and bit-error rates of MIMO systems. The B4 broadband radio@hand project brings together Dutch centers of innovation to study wireless systems that fulfill bandwidth and quality needs in... [28 Mar 2005]
MIMO OFDM Receivers for Systems With IQ Imbalances
White Paper In this paper, the effect of IQ imbalances on multi-input multi-output (MIMO) OFDM systems is studied and a framework for combating such distortions through digital signal processing is developed. The resulting IQ distortion limits the achievable... [23 Mar 2005]
Multiple-Antenna Technology in WiMAX Systems
White Paper In order to increase the range and reliability of WiMAX systems, the IEEE 802.16-2004 standard supports optional multiple-antenna techniques such as Alamouti Space-Time Coding (STC), Adaptive Antenna Systems (AAS) and Multiple-Input Multiple... [30 Nov 2004]
