ofdm in white papers
Performance Comparison of OFDM Carrier Synchronization Algorithms With Diversity
White Paper This paper compares the performances of Non Linear Least Squares (NLS) method and Maximum Likelihood Estimation (MLE) method used for carrier frequency synchronization in Orthogonal Frequency Division Multiplexing (OFDM) communication systems. [03 Jul 2008]
Approaching MIMO-OFDM Capacity With Per-Antenna Power and Rate Feedback
White Paper This paper presents power-efficient transmission schemes for the Multiple-Input Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) block-fading channel under the assumption that the channel is known only perfectly at the... [03 Jul 2008]
Asymptotic Performance of Transmit Diversity Via OFDM for Multipath Channels
White Paper Here it shows that when the Alamouti code is placed within an OFDM structure, using adjacent frequency bands rather than consecutive symbol intervals, it can asymptotically achieve the same performance in multipath fading as the Alamouti code in... [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. For this purpose, the authors obtain a sphere packing lower bound on average word error probability... [03 Jul 2008]
Flexible Embedded Processors for Developing Multi-Standard OFDM Broadcast Receivers
White Paper This paper presents a set of embedded digital signal processors to build a programmable OFDM receiver that can address a variety of broadcast formats as used for both digital television and digital radio in multiple geographic regions. [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]
MIMO-OFDM Channel Estimation for Correlated Fading Channels
White Paper This paper presents MIMO-OFDM channel estimation for spatially correlated channels using frequency domain estimation techniques. First, the exploitation of spatial correlation on further improving the channel estimates is investigated. [03 Jul 2008]
Transmitter Architecture for Pulsed OFDM
White Paper A multi-band OFDM UWB system is the leading proposal for the new IEEE 802.15.3a standard for wireless high bit-rate personal area networks. Pulsed OFDM is an enhancement to the multi-band OFDM system that offers better performance with lower... [03 Jul 2008]
Experimental Studies on Optimal Space-Frequency Codes for MIMO-OFDM Systems
White Paper This paper tests the performance of optimal Space-Frequency Code (SFC) in Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) communication system on Stevens Wireless Testbed. [03 Jul 2008]
Window Function and Interpolation Algorithm for OFDM Frequency-Offset Correction
White Paper In Orthogonal Frequency-Division Multiplexing (OFDM) digital communication systems, an uncorrected frequency offset can lead to a severe degradation of the system performance. This paper describes a technique to mitigate the influence of frequency... [03 Jul 2008]
Spectral Weighting Functions for Single-Symbol Phase-Noise Specifications in OFDM Systems
White Paper For the specification of phase-noise requirements for the front-end of a HiperLAN/2 system the authors investigated available literature on the subject. Literature differed in several aspects. One aspect is in the type of phase-noise used (Wiener... [03 Jul 2008]
Optimal Peak-to-Average Power Ratio Reduction in MIMO-OFDM Systems
White Paper Recent work has used convex optimization to minimize the Peak-to-Average power Ratio (PAR) of OFDM signals subject to a constraint on the constellation Error Vector Magnitude (EVM). This paper extends the PAR optimization technique to Multiple... [03 Jul 2008]
Noise Power and SNR Estimation for OFDM Based Wireless Communication Systems
White Paper In this paper, noise power and Signal-to-Noise Ratio (SNR) estimations for OFDM based wireless communication systems are studied. Noise power estimation, which takes into account the color and variation of noise statistics over OFDM sub-carriers... [03 Jul 2008]
A Pragmatic Adaptive OFDM/FDD Cellular System in Frequency-Selective Fading Channels
White Paper This paper talks about an adaptive transmission scheme using QAM and LDPC code proposed for an OFDM cellular system employing FDD. By approximating the LLR distribution to a Gaussian distribution, only two parameters, the mean and the normalized... [03 Jul 2008]
Channel Estimation for OFDM Systems With Multiple Transmit Antennas by Filtering in Time and Frequency
White Paper This paper addresses pilot-symbol aided channel estimation (PACE) for orthogonal frequency division multiplexing (OFDM) based systems, with multiple transmit antennas. An approach is presented which estimates and separates NT superimposed signals... [03 Jul 2008]
Keep updated for stories matching ofdm in white papers via RSS
