This paper presents an Orthogonal Frequency Division Multiplexing (OFDM) transceiver that makes use of a low power Fast Fourier Transform (FFT) along with a Least Mean Square (LMS) filter. The folded FFT is developed via folding transformation and register minimization techniques with real values as inputs which leads to reduction in hardware complexity by exploiting the redundancy present in c...

Under many research works, it has been observed that the multiple input multiple output (MIMO) system can be considered an efficient solution for the high-speed wireless communication. However, the delay spreads in non-flat fading channels abrupt the functioning of MIMO system. In orthogonal frequency division multiplexing (OFDM), the channel impulse response is flat in each sub carrier. Hence,...

This study presents, design of modified R2MDC with pipelined Technique. Radix-2 Multipath Delay commutators is the one type of Radix-2 FFT. Wireless networks have found a significant place in the growing technologies. Orthogonal Frequency Division Multiplexing (OFDM) is a key technique used in wireless networks for high speed operation, high data capacity and spectral efficiency. The Fast Fouri...

The technique of orthogonal frequency divisionmultiplexing (OFDM) is famous for its robustness against frequency-selective fading channel. This technique has been widely used in many wired and wireless communication systems. In general, the fast Fourier transform (FFT) and inverse FFT (IFFT) operations are used as the modulation/demodulation kernel in the OFDM systems, and the sizes of FFT/IFFT...

This paper proposes a novel pre-FFT type OFDM adaptive array antenna called “Eigenvector Combining.” The eigenvector combining array antenna is a realization of a post-FFT type OFDM adaptive array antenna through a pre-FFT signal processing, so it can achieve excellent performance with less computational complexity and shorter training symbols. Numerical results demonstrate that the proposed ei...

Pipeline FFT processors are used in mobile communication systems and in particular in OFDM-based systems. This paper presents a method for power analysis and clock optimization of pipeline FFT processors for particular OFDM baseband system. This method is applied to various architectures with different radices. The analysis can be used in the design of high speed pipeline FFT processors.

Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing technology is an advanced transmission technique for wireless communication systems. In this paper, the 64 point pipeline FFT/IFFT processor is introduced for efficient implementation of OFDM architecture. The IFFT processor is used to modulate the subcarrier in transmitter section and FFT processor demodulate the subcarr...

Fast Fourier transforms (FFT) and Inverse Fast Fourier Transform (IFFT) processing is one of the key procedures in popular orthogonal frequency division multiplexing (OFDM) communication systems. This paper presents the study of an efficiency of the fast Fourier transform may be increased by removing operations of input values which are zero, and of output values which are not required; this pr...

As the generation grown up, designing of the wireless communication system towards providing best performance by the services such as high speed of data delivery, high capacity and high bit rate. MC-CDMA (Multi CarrierCode Division Multiple Access) is a desired technique for such cases, MC-CDMA gives best results by the combination of OFDM (Orthogonal Frequency Division Multiplexing) and CDMA (...