Low-complexity adaptive iteration algorithm for frequency tracking in OFDM systems

A Low Complexity Forward Error Correction for PAPR reduction in OFDM Systems

In this paper, a Peak to Average Power Ratio (PAPR) reduction technique in Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. This technique uses error correction capability of channel coding to reduce the PAPR.The coded bits at the input of OFDM modulator are separated into two groups of the Most Significant Bits (MSB) and the LeastSignificant Bits (LSB). The bits are mappe...

Fast frequency tracking algorithm for OFDM applications

A Low Complexity Adaptive Channel Estimation Scheme for OFDM Systems over Frequency-selective Fading Channels ?

Channel estimation is one of the key technologies in Orthogonal Frequency Division Multiplexing (OFDM) systems, which has received more and more consideration. At first, the scheme uses the idea of matrix diagonalization to improve the Minimum Mean Square Error (MMSE) estimation method, making it to greatly reduce the complexity while maintain the estimate convergence. Then, an adaptive scheme ...

A Low Complexity and Robust Frequency Offset Estimation Algorithm for OFDM-Based WLAN Systems

This paper addresses the frequency offset estimation problem in the presence of the timing error for OFDM-based WLAN systems. When the timing error exists, the correlation value used for the frequency offset estimation could be reduced significantly due to the timing error, resulting in considerable degradation in estimation performance. In this paper, using the coherence phase bandwidth (CPB) ...

arrier Frequency Acquisition Tracking for OFDM Systems

In this paper, we present and analyze a technique for fast acquisition and accurate tracking of the carrier frequency in orthogonal frequency division multiplexing (OFDM) receivers. The scheme is based on a data-aided frequency estimation algorithm recently proposed in the literature by the authors. The presence of known symbol sequences periodically inserted in the OFDM frame allows the data d...