In this paper, we investigates the effects of two different modulation schemes for image transmission using an OFDM (Orthogonal Frequency Division Multiplexing) transceiver. The main aim is to evaluate the performance between 16PSK (Phase Shift Keying) and 16QAM (Quadrature amplitude modulation) in context of BER (Bit Error Rate) in AWGN (Additive White Gaussian Noise) channel. We evaluate the ...

Fifth generation (5G) wireless networks must meet the needs of emerging technologies like Internet Things (IoT), Vehicle-to-everything (V2X), Video on Demand (VoD) services, Device to communication (D2D) and many other bandwidth-hungry multimedia applications that connect a huge number devices. 5G demand better bandwidth efficiency, high data rates, low latency, reduced spectral leakage. To the...

Conventional OFDM employs a guard interval to combat delay spread distortion oftransmitted data. This reduces the efliciency of the OFDM transmission. The combined OFDM-Equalization strategy described here employs an Adaptive Equalizer to combat delay spread distortion and thereby facilitates the use of very short guard intervals and thus a more eflcient OFDM modulation scheme. The OFDM receive...

The orthogonal frequency division multiplex (OFDM) transmission technique can efficiently deal with the effects of multi-path propagation in the broadband radio channel. It also has a high system inherent flexibility for designing a multiple access scheme by combining the conventional TDMA, FDMA and CDMA approaches with the OFDM modulation scheme. The FDMA multiple access scheme is especially i...

HE TECHNIQUE described in this paper has been deT veloped to correct frequency offset errors in digital communications systems employing orthogonal frequency division multiplexing (OFDM) as the method of modulation. The aim of the paper is twofold; to show the effect offset errors have on the signal-to-noise ratio of the OFDM carriers and to present an algorithm to estimate offset so that it ma...

In recent years, the explosive growth of new generation wireless networks has spurred lot of research thrust particularly looking for a bandwidth efficient modulation and coding scheme. In this connection, researchers have recently turned up their attention towards chaotic communication systems and golden codes for its attractive benefits. This consequently had motivated us for two new proposal...

This paper studies the adaptive coded modulation for OFDM system using punctured convolutional code, channel estimation, equalization and SNR estimation. The estimation based on block type pilot arrangement is performed by sending pilots at every sub carrier this a specific number of following symbols. Signal to noise ratio estimated receiver then transmitted transmitter through feedback ,the a...