In recent years, the wireless industry has shown great interest in OFDM systems. Indeed, such systems have been adopted in a variety of wireless applications such as digital audio broadcasting (DAB) and digital video broadcasting (DVB). Moreover, OFDM has also been proposed for indoor wireless networks and fixed wireless broadband access [1,2]. This growing interest was due to the realisation t...

We present an OFDM frequency synchronization scheme. This paper presents an extended solution for the carrier frequency synchronization problem of OFDM. The scheme uses number of bits, modulation level, cyclic prefix, FFT size similarly to the algorithm proposed by Tilde Fusco [21].The proposed scheme attains considerably higher accuracy than the scheme by [21] requiring convolutional encoding ...

Upcoming wireless transmission systems, such as 4G, will most likely utilize MIMO in order to enhance data rate and link reliability. OFDM will be the enabler to combat the effects of a multipath environment. In this paper we will present results that we have obtained during the design of our FPGA−based MIMO concept demonstrator. Special attention will be given to FPGA suitable implementation o...

Orthogonal Frequency Division Multiplexing (OFDM) is the most widely used modulation technique for wireless communication network. In this paper, 4 x 4 spatially multiplexed MIMO OFDM transceiver is designed using 1/2 encoder and 64 bit FFT. The implementation has been carried out in hardware using Field Programmable Gate Array (FPGA). Both the transmitter and the receiver are implemented on a ...

Orthogonal Frequency Division Multiplexing (OFDM) enables high throughput data transmissions over frequency selective fading channels. Using a cyclic prefix the transmission channel can be described by circular convolution, which allows low complexity FFT based receiver implementations. Generally the CP is discarded at the receiver prior to data estimation, i.e. the redundancy contained in the ...

The next generation wireless communications systems require higher data rates transmission in order to meet the higher demand of quality services. Research in wireless digital communications techniques have been expending very rapidly in the last few decades, resulting more reliable wireless communication systems that operate at higher spectral efficiency. Since there have been an increased in ...

In this paper, we propose clipping noise cancellation scheme using compressed sensing (CS) for orthogonal frequency division multiplexing (OFDM) systems. In the proposed scheme, only the data tones with high reliability are exploited in reconstructing the clipping noise instead of the whole data tones. For reconstructing the clipping noise using a fraction of the data tones at the receiver, the...

Orthogonal Frequency Division Multiplexing (OFDM) is a form of multicarrier transmission, in which a high-rate data stream is transmitted in a parallel manner over a number of low-rate orthogonal subcarriers. Thanks to advances in VLSI technology, high-speed, high-order FFT/IFFT chips which implement OFDM modulation have become commercially viable, thus making OFDM a candidate for many commerci...

Selected mapping (SLM) is a suitable scheme, which can solve the peak-to-average power ratio (PAPR) problem. Recently, many researchers have concentrated on reducing the computational complexity of the SLM schemes. One of the low complexity SLM schemes is the Class III SLM scheme which uses only one inverse fast fourier transform (IFFT) operation for generating one orthogonal frequency division...

There is a significant demand for a decrease in the size, weight and power (SWaP) associated with wireless systems. In this research, a low-complexity MIMO OFDM system is advanced. The proposed system is essentially multiplierless and thus requires much simpler digital hardware to be implemented. As a result, the chip area associated with the MIMO OFDM system can be significantly reduced. The r...