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Publications associées (35)

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On the Joint Compensation of IQ Imbalances and Phase Noise in MIMO-OFDM Systems

Ali H. Sayed

OFDM systems are susceptible to receiver impairments such as IQ imbalance and phase noise. These impairments can severely degrade the achievable effective signal-to-noise ratio at the receiver. In this paper, we propose a joint compensation scheme to mitig ...

IEEE2007

Compensation of Phase Noise in OFDM Wireless Systems

Ali H. Sayed

Phase noise causes significant degradation in the performance of orthogonal frequency division multiplexing (OFDM)-based wireless communication systems. The presence of phase noise can reduce the effective signal-to-noise ratio (SNR) at the receiver, and c ...

IEEE2007

Joint compensation of transmitter and receiver impairments in OFDM systems

Ali H. Sayed

The implementation of OFDM-based systems suffers from impairments such as in-phase and quadrature-phase (IQ) imbalances in the front-end analog processing. Such imbalances are caused by the analog processing of the radio frequency (RF) signal and can be pr ...

IEEE2007

Joint Compensation of IQ Imbalance and Phase Noise in OFDM Systems

Ali H. Sayed

The joint effects of IQ imbalance and phase noise on OFDM systems are analyzed, and a compensation scheme is proposed to improve the system performance. The scheme consists of a joint channel estimation algorithm and a joint data symbol estimation algorith ...

IEEE2006

A phase noise compensation scheme for OFDM wireless systems

Ali H. Sayed

Phase noise causes significant degradation in the performance of Orthogonal Frequency Division Multiplexing (OFDM) based wireless communication systems. In the proposed compensation scheme, the communication between the transmitter and receiver blocks cons ...

2006

OFDM systems with both transmitter and receiver 1Q imbalances

Ali H. Sayed

IEEE2005

Compensation schemes and performance analysis of IQ imbalances in OFDM receivers

Ali H. Sayed

The implementation of orthogonal frequency division multiplexing (OFDM)-based physical layers suffers from the effect of In-phase and Quadrature-phase (IQ) imbalances in the front-end analog processing. The IQ imbalances can severely limit the achievable o ...

Institute of Electrical and Electronics Engineers2005

MIMO OFDM receivers for Systems with IQ imbalances

Ali H. Sayed

Orthogonal frequency division multiplexing (OFDM) is a widely recognized modulation scheme for high data rate communications. However, the implementation of OFDM-based systems suffers from in-phase and quadrature-phase (IQ) imbalances in the front-end anal ...

IEEE2005

On the baseband compensation of IQ imbalances in OFDM systems

Ali H. Sayed

OFDM is a widely recognized and standardized modulation scheme for future high bit rate communications. Implementation of OFDM-based systems suffers from inphase-quadrature phase (IQ) imbalances in the front-end analog processing. The IQ imbalances can sev ...

2004

Adaptive Channel Estimation for Space-Time Block Coded MIMO--OFDM Communications

Ali H. Sayed

We develop adaptive channel estimation techniques for space–time block–coded (STBC) multiple–input multiple–output (MIMO) orthogonal frequency division multiplexing (OFDM) communications. The structure of the space–time code is exploited to lower the compl ...

2004