The application of differential modulation diversity (DMD) to orthogonal frequency division multiplexing with multiple transmit and/or receive antennas is considered. Based on diagonal signals originally designed for differential space-time modulation, DMD is used to exploit both space and frequency diversity. At the receiver, low-complexity decision-feedback differential detection without chan...

Abstract: Orthogonal frequency division multiplexing (OFDM) combined with time division multiplexing (TDM) can bridge the conventional OFDM and single carrier (SC) transmission by using minimum mean square error (MMSE) frequencydomain equalization (FDE). The channel frequency-selectivity can be exploited by MMSE-FDE to improve the bit error rate (BER) performance. A much better BER performance ...

In this paper, we study space-time block coding for single carrier block transmissions through frequency selective multipath channels of order L. We prove that maximum diversity of order 2(L + 1) can be achieved with two transmit and one receive antennae. We show that simple linear receiver processing can achieve full antenna diversity gains, and investigate the performance versus complexity tr...

Fading is a fundamental problem in wireless communication. However Space time block code scheme is suggested to overcome this problem. In the paper various combination of transmit and receive antenna was considered, a mathematical model was driven and applied using simulation. The relation between signal to noise ratio and bit error rate was plotted. From results it is noted that the receiver d...

In this paper, Bit Error Rate (BER) performance of Feedback-type Adaptive Array Antenna (AAA) in Frequency Division Duplex/Direct Sequence Code Division Multiple Access system (FDD/DS-CDMA) with Mobile Station (MS) reception diversity will be investigated. The results include the effects of maximum Doppler frequencies (fd) and antenna element spacing at Base Station (BS) under flat fading and f...

In this paper we evaluate the performance of LTE-Downlink System with different Transmit diversity and Spatial multiplexing MIMO modes in LTE-downlink. Here we analysis performance on BLER-Block Error Rate and Data Throughput vs SNR-Signal to Noise Ratio. Two Transmit Diversity schemes Space Frequency Block Codes (SFBC) and Frequency Switched Transmit Diversity (FSTD) and two Spatial Multiplexi...

Multiple-input multiple-output (MIMO) wireless communication system exploits the multiple spatial channels to achieve higher data rate or improved performance in multipath fading environment. Different types of diversity techniques such as temporal, frequency, code and spatial have been developed in the literature. In addition to the destructive multipath nature of wireless channels, frequency ...

In the recent years, multiple-input multiple-out (MIMO) technology has attracted lots of attention because it significantly increases the data throughput (multiplexing gain) and link reliability (diversity gain) without additional bandwidth or transmission power. Orthogonal frequency division multiplexing (OFDM) technology has been developed into a popular scheme for wideband digital communicat...