multiple systems fading
A BER Analysis of a Space-Time Signal Processing Scheme That Combines Transmitter Diversity With Beamforming
White Paper The introduced scheme achieves the diversity gain over Rayleigh fading channel through the transmitter diversity technique, and the Signal-to-Noise Ratio (SNR) gain by the beamforming technique. Bit Error Rate (BER) analyses are given each of the... [16 Jun 2006]
Multi-Mode Antenna Selection for Spatial Multiplexing Systems With Linear Receivers
White Paper In Rayleigh fading matrix channels, however, spatial multiplexing with low complexity linear receivers suffers due to a lack of diversity advantage. This paper proposes multi-mode antenna selection which uses a low-rate feedback channel to improve... [10 May 2006]
Asymptotic Performance Analysis for Redundant Block Precoded OFDM Systems With MMSE Equalization
White Paper In this paper, the performance of MMSE receivers for certain large random isometric precoded OFDM systems on fading channels is analyzed. A multi-carrier OFDM system using a Cyclic Prefix for preventing inter-block interference is known to be... [26 Jul 2005]
Simplified Channel Tracking for MIMO-OFDM Systems
White Paper For fading coefficients based receivers, the performance of the receiver depends largely on the accuracy of the estimated channel. Multiple-input multiple-output (MIMO) wireless systems can realize large spectral efficiency and high performance... [26 Jul 2005]
An Improved Detection Technique for Receiver Oriented MIMO-OFDM Systems
White Paper In case of a broadband wireless transmission, the channel undergoes frequency selective fading which necessitates the receiver to have a multi tap equalizer. In rich scattering environments, layered Space Time architectures like the BLAST (Bell... [26 Jul 2005]
Improved Detection Methods for MIMO-OFDM-CDM Communication Systems
White Paper The radio channel constitutes a hostile propagation medium, which suffers from fading and interference from other users. This paper considers multiple input multiple output-orthogonal frequency division multiplexing-code division multiplexing (MIMO... [26 Jul 2005]
The Performance of Multi-Carrier CDMA With Base Station Antenna Arrays in Fading Channels
White Paper In this paper, the reverse link performance of a MC-CDMA system along with base station antenna arrays employing three combining schemes: EGC, MRC and MMSEC in Rayleigh fading channel environments is analyzed and compared. [26 Jul 2005]
Link Performance Evaluation for EGPRS With Multiple Antennas
White Paper Transmission diversity schemes have recently emerged in wireless systems as an attractive solution in order to mitigate fading effects. Space-time block codes (STBC) with two antennas can provide similar order diversity as maximal-ratio receiver... [26 Jul 2005]
Comparison of Coded OFDMA and OFDM-CDMA in a Frequency Reuse One System
White Paper For high system loads it is shown that OFDMA, due to its lower complexity and ability to maintain orthogonality on frequency-selective fading channels, outperforms the others. The results presented in this paper questions use of direct-sequence... [21 Jul 2005]
Magic Squares Transmission Scheme for MIMO OFDM Systems Under Fast Fading Channel
White Paper This paper presents high data rate transmission scheme for Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems under fast fading channel in wireless communication. [21 Jul 2005]
Space-Frequency Coded Broadband OFDM Systems
White Paper Space-time coding for fading channels is a communication technique that realizes the diversity benefits of multiple transmit antennas. Previous work in this area has focused on the narrowband flat fading case where spatial diversity only in available. [28 Mar 2005]
Code Design for Non-Coherent MIMO-OFDM Systems
White Paper Recently, the use of coherent space-frequency coding in Orthogonal Frequency Division Multiplexing (OFDM)-based frequency-selective multiple-input multiple-output (MIMO) antenna fading channels has been proposed. [28 Mar 2005]
Downlink Radio Resource Allocation for Multi-Cell OFDMA System
White Paper Orthogonal frequency division multiple access (OFDMA) provides a feasible broadband platform where different forms of multiuser diversities (e.g.mutual interference, selective fading channels and bursty traffics) can be efficiently exploited. [02 Nov 2004]
Bit Interleaved Space-Frequency Coded Modulation for OFDM Systems
White Paper This paper presents an orthogonal frequency-division multiplexing (OFDM) system with bit-interleaved space-frequency coded modulation for frequency selective fading channels employing multiple transmit and receive antennas. [02 Nov 2004]
OFDMA Code-Division Multiplexing With Pre-Equalization for Mobile Communications
White Paper Different pre-equalization techniques are investigated, and it is shown that pre-equalized OFDMA-CDM systems can achieve promising performance in fading channels. In this paper, the potential of orthogonal frequency-division multiple-access-code... [29 Oct 2004]
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