inter carrier interference
Increasing Time Domain Diversity in OFDM Systems
White Paper However, extensive delay and Doppler spread may cause non-negligible Inter-Symbol Interference (ISI) and/or Inter-Carrier Interference (ICI) in OFDM systems. Delay- and Doppler spread of multipath fading channels have already been identified as... [11 Apr 2007]
Performance Degradation of OFDM Systems Due to Doppler Spreading
White Paper The time variations of the channel during one OFDM symbol interval destroy the orthogonality of the different subcarriers and generate power leakage among the subcarriers, known as Inter-Carrier Interference (ICI). [11 Apr 2007]
Concatenated Codes Design for OFDM Based Wireless Local Area Networks
White Paper The advantages of OFDM systems are high spectrum efficiency, longer symbol duration against Inter-Symbols Interference (ISI) effect in multi-path environments, and narrow transmission band of each sub-carrier within coherence bandwidth such that... [11 Apr 2007]
Asymptotic Performance Analysis for Redundant Block Precoded OFDM Systems With MMSE Equalization
White Paper A multi-carrier OFDM system using a Cyclic Prefix for preventing inter-block interference is known to be equivalent to multiple flat fading parallel transmission channels in the frequency domain. Linear Precoding consists in multiplying by a N x K... [26 Jul 2005]
Orthogonal Frequency Division Multiplexing for Wireless Communications
White Paper In particular the paper addresses the following aspects of OFDM: inter-carrier interference (ICI) suppression, co-channel interference suppression for clustered OFDM, clustered OFDM based anti-jamming modulation, channel estimation for MIMO-OFDM... [21 Jul 2005]
Comparison of Coded OFDMA and OFDM-CDMA in a Frequency Reuse One System
White Paper It is shown that practically no difference exists between the schemes in their robustness against inter-cell-interference. In this paper the downlink performance of convolutionally coded and single-user detected OFDMA, Multi-Carrier CDMA, Multi... [21 Jul 2005]
Simple Doppler Compensation for DVB-T
White Paper In the DVB-T system, the Inter-carrier Interference (ICI) caused by the vehicle speed limits the achievable throughput. This paper presents a simple method to improve the performance of the system. This method uses Wiener filters to estimate and... [28 Mar 2005]
Common Phase Error Correction for OFDM in Wireless Communication
White Paper In this paper the phase noise is resolved into two components, namely the Common Phase Error (CPE), which affects all the subchannels equally and the Inter Carrier Interference (ICI), which is caused by the loss of orthogonality of the subcarriers. [28 Mar 2005]
Scattered Pilot OFDM Reception Employing Turbo Interference Cancellation for ICI Caused by Fast Fading Fluctuations
White Paper This paper proposes a scattered-pilot-OFDM reception scheme with turbo interference cancellation for alleviating inter-carrier interference (ICI) caused by the Doppler shift. The proposed receiver carries out two modes: (i) a coherent detection (CD... [01 Nov 2004]
A Low-Complexity Receiver for OFDM in Doubly-Selective Channels
White Paper Orthogonal frequency division multiplexing (OFDM) systems may experience significant inter-carrier interference (ICI) when used in time- and frequency-selective, or doubly- selective, channels. In such cases, the classical symbol estimation schemes... [01 Nov 2004]
ICI Mitigation for OFDM Mobile Systems
White Paper However, for mobile applications, channel variations during one OFDM frame introduce Inter-Carrier-Interference (ICI), which degrades the performance. Orthogonal Frequency Division Multiplexing (OFDM) is robust against Inter-Symbol-Interference... [29 Oct 2004]
Frequency-Time Block Codes for OFDMA Uplink Applications
White Paper Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier block modulation scheme primarily used in high bit rate systems to mitigate inter-symbol interference (ISI) due to delay spread in multipath wireless channels. [26 Oct 2004]
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 shows that the carrier-based solution for the... [26 Oct 2004]
A New OFDM Demodulation Method With Variable-Length Effective Symbol and ICI Canceller
White Paper This paper proposes a new OFDM demodulation method with a variable-length effective symbol and a multi-stage inter-carrier interference (ICI) canceller, in order to improve the bit error performance in the presence of multipaths whose excess... [21 Oct 2004]
OFDM Overview
White Paper It achieves high speed data rates, prevents inter-symbol interference (ISI), and overcomes multi-path signals. Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technique. [16 Oct 2004]
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