fading diversity
RSS fading diversityLDPC Based Differential Unitary Space-Frequency Coding for MIMO-OFDM Systems
White Paper It can fully exploit the inherent advantages provided by the multipath fading channels, resulting in a high degree of diversity. This paper proposes a novel LDPC based differential unitary space-frequency coding (DUSFC) scheme for MIMO-OFDM systems... [10 Aug 2008]
Performance Analysis of Linear Multisensor Multiuser Receivers for CDMA in Fading Channels
White Paper Bit-Error Probability (BEP) analysis for linear multiuser receivers with multiple sensors in frequency selective Rayleigh fading channels is presented. The analysis is applied to evaluate the BEP in antenna diversity reception and in a cellular... [03 Jul 2008]
Frequency-Hopping Versus Interference Cancellation for TD-CDMA
White Paper Slow Frequency-Hopping (SFH) with Frequency Overlap (FO) between adjacent carriers and interference cancellation are also included in the analysis, which considers the multipath Rayleigh fading channel (which models indoor and outdoor vehicular... [03 Jul 2008]
Asymptotic Performance of Transmit Diversity Via OFDM for Multipath Channels
White Paper The major drawback is that this system only works when a "Flat-fading" model for the channel is assumed; when used in a multipath environment, the system breaks down. Here it shows that when the Alamouti code is placed within an OFDM structure... [03 Jul 2008]
Experimental Studies on Optimal Space-Frequency Codes for MIMO-OFDM Systems
White Paper As a comparison, The paper also test the performance of Single Input Single Output (SISO) system and MIMO system with simple transmit delay diversity in the same frequency-selective fading environment. [03 Jul 2008]
On Performance Limits of MIMO-OFDM Systems Over Block-Fading Channels
White Paper This paper investigates the effect of system parameters on performance limits of space-time-frequency coded OFDM systems over block-fading channels. It is also shown how these parameters affect the mean and the variance of instantaneous channel... [03 Jul 2008]
Performance Analysis of Diversity Combining Method for OFDM Blind Carrier Synchronization
White Paper Orthogonal Frequency Division Multiplexing (OFDM) communications transform frequency selective channels into multiple low rate subchannels robust against frequency selective fading. Carrier Frequency Offset (CFO) between transmitter and receiver... [03 Jul 2008]
Physical Layer Implementation and Evaluation of Multiple Input Multiple Output - Orthogonal Frequency Division Multiplexing (MIMO-OFDM) System
White Paper The system has the key features of antenna diversity maximizing and fading-robustness with the preamble/pilots and frame structures, which are suitable for channel estimation, timing and frequency synchronization and unbiased signal-to-noise-plus... [03 Jul 2008]
Blind Carrier Offset Estimation for MIMO OFDM Systems: Cramer Rao Bound and Nonlear Least Squares
White Paper Orthogonal Frequency Division Multiplexing (OFDM) communications transform frequency selective channels into multiple low rate subchannels robust against frequency selective fading. This paper presents the nonlinear least squares (NLS) estimator... [03 Jul 2008]
Multi-Way Diversity Reception for Digital Microwave Systems
White Paper These techniques over come the problems of flat fading experienced under severe multi-path conditions that basic COFDM implementations cannot cope with. This white paper describes the benefits of multi-way diversity receive systems and details the... [03 Jul 2008]
Performance Improvement of OFDM System Using Transmit Diversity With Space-Time Block Coding
White Paper Orthogonal frequency division multiplexing (OFDM) is a special technique for communication systems, which can support the high data rate transmission with sufficient robustness to fading channels. This paper compares the performance of space-time... [03 Jul 2008]
Space-Time Coded OFDM Using LDPC
White Paper Compared with the conventional space-time trellis code (STTC), the LDPC-based STC can significantly improve the system performance by exploiting both the spatial diversity and the selective-fading diversity in wireless. [03 Jul 2008]
Space-Time Bit-Interleaved Coded Modulation for OFDM Systems in Wireless LAN Applications
White Paper By using Orthogonal Frequency Division Multiplexing (OFDM), wideband transmission can be achieved over frequency selective fading radio channels. Bit-interleaved coded modulation gives good diversity gains with higher order modulation schemes using... [03 Jul 2008]
Space-Time Bit-Interleaved Coded Modulation for OFDM Systems
White Paper By using orthogonal frequency division multiplexing (OFDM), wideband transmission can be achieved over frequency-selective fading radio channels without adaptive equalizers. Bit-interleaved coded modulation gives good diversity gains with higher... [03 Jul 2008]
Multiple Antennae Receive Diversity for Mobile OFDM Systems
White Paper It considers the use of multiple antennas to combat time-selective fading and OFDM transmission in combination with an appropriate guard interval to suppress inter-symbol interference. This paper investigates receive diversity for OFDM-based... [03 Jul 2008]
