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whitepaper The loss of orthogonality among subcarriers causes inter-carrier interference (ICI), which affects both channel estimation and detection of OFDM data symbols. Orthogonal Frequency Division Multiplexing OFDM), which is a multicarrier modulation...
[11 Apr 2008]
whitepaper The time variation of the channel during one OFDM frame destroys the orthogonality of different sub-carriers and generates power leakage among the subcarriers, known as Inter-Carrier Interference (ICI).
[10 Apr 2008]
whitepaper It is primarily used in high bit rate systems to mitigate inter-symbol interference (ISI) caused due to de- lay spread. Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier block modulation scheme suitable for wireless communications.
[03 Apr 2008]
whitepaper This frequency offset introduces inter-carrier interference (ICI) in the OFDM symbol. Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multi-carrier modulation scheme, which has been adopted for several wireless standards such as...
[27 Jul 2007]
whitepaper This paper addresses the problem of OFDM transmission over a time-varying, frequency-selective channel with high Doppler spread. This paper analyzes the CP-OFDM transmission mechanism, and the impairments due to the channel variations, using a...
[18 Apr 2007]
whitepaper In OFDM transmission, a loss of subcarrier orthogonality due to Doppler-spread of the channel leads to Inter-Carrier Interference (ICI), especially, under mobile reception environments. ICI causes significant degradation of bit error rate...
[18 Apr 2007]
whitepaper It is mainly suited to inter carrier interference limited situations, when a large number of sub carriers are used within the available bandwidth constraint. A novel multi rate Orthogonal Frequency Division Multiplexing (OFDM) system is proposed in...
[18 Apr 2007]
whitepaper 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.
[18 Apr 2007]
whitepaper Channel frequency response estimates are affected by noise and Inter-Carrier Interference (ICI). This paper presents a method for estimating the Doppler spread in mobile Orthogonal Frequency Division Multiplexing (OFDM) systems.
[13 Apr 2007]
whitepaper It is shown by computer simulations that the proposed scheme can effectively mitigate the inter-carrier interference caused by phase noise and improve the bit error rate of OFDM systems. Phase noise causes significant degradation in the performance...
[13 Apr 2007]
whitepaper Carrier Frequency Offset (CFO) is a major contributor to the inter-carrier - interference in OFDM systems. This effect becomes more sever when compounded by the presence of Doppler fading in wireless channels.
[13 Apr 2007]
whitepaper This paper presents a low-complexity soft demapper that computes bit Log-Likelihood Ratios (LLRs) while suppressing Orthogonal Frequency Division Multiplexing (OFDM) Inter-Carrier Interference (ICI). The proposed demapper consists of two stages and...
[13 Apr 2007]
whitepaper According to the concept specification, inter-cell interference mitigation techniques applicable to SC-FDMA and OFDMA systems are expected to be the key radio resource management techniques for E-UTRA.
[13 Apr 2007]
whitepaper However, the longer symbol duration increases the Inter-Carrier-Interference (ICI) caused by Doppler spread in time variant channels. Orthogonal Frequency Division Multiplexing (OFDM) has an increased symbol duration which makes it robust against...
[11 Apr 2007]
whitepaper Performance degradation due to Wiener phase noise which causes both Common Phase Error (CPE) and Inter-Carrier Interference (ICI) is a crucial challenge to the implementation of OFDM systems. This paper theoretically employs the Lorentzian model to...
[11 Apr 2007]
whitepaper 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]
whitepaper 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]
whitepaper 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]
whitepaper The receiver design is based on a new space-time interference cancelling technique for MIMO-OFDM ad hoc networks which suppresses co-channel interference and jammers, separates out multiple data streams, and minimizes Inter-Carrier Interference...
[17 May 2006]
whitepaper 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]
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