Abstract Recently, we proposed analog single-carrier transmission with frequency-domain equalization (analog SC-FDE) in order to improve performance of analog signal transmission. Analog SC-FDE signal spectrum has a complex conjugate relation between lower sideband (LSB) and upper sideband (USB) since analog signal is real-valued. Exploiting this property, the LSB and USB subcarriers can be com...

Diversity is a powerful technique to mitigate fading, hence multiple antenna diversity which includes; multiple devices, spatial diversity, cooperative diversity which uses multiple-element transmitter arrays enhance performance greatly in modern wireless communication networks. Appropriate combining at the receiver realizes diversity gain. major interest in this write up is the MIMO {Multiple-...

In this paper, we study a multi-sine multiple-input multiple-output (MIMO) wireless power transfer (WPT) system with the objective to increase output DC power. We jointly optimize waveform and beamforming accounting for rectenna nonlinearity, consider two combining schemes rectennas at receiver, namely RF combinings. For combining, transmit are optimized, as function of channel state informatio...

We experimentally investigate the impact of spectral phase mismatch on the coherent beam combining of two femtosecond fiber chirped-pulse amplifiers. By measuring the differential spectral phase, both linear and nonlinear contributions are identified. An accumulated nonlinear phase as high as 6 rad has been measured, for which a combination efficiency of 91% can be obtained by symmetrizing the ...

Single cell reuse of the same frequency, which is possible in DS-CDMA cellular systems, yields the option of site diversity to increase link capacity. In this letter, a generalized case of site diversity transmission is considered where multiple base stations (BS’s) are involved in weighted transmissions with constant total transmit power to a target mobile station (MS). A general equation of c...

Both adaptive modulation and diversity combining are attractive techniques to combat fading and these two can be applicable to each digital-modulated symbol in OFDM transmission. In this letter, aiming to combat severe fading more effectively than the adaptive modulation, we theoretically analyze the benefit of a frequency diversity scheme within one OFDM symbol, which is a simple kind of coded...

The recognition that predators play important roles in ecosystems has prompted research to resolve how combinations of predator species influence ecosystem functions. Interactions among predator species and their prey can lead to a host of linear and nonlinear effects. Understanding the conditions causing these effects is critical for assigning predator species to functional groups in ways that...

In this paper, we propose a new relaying protocol for large multihop networks combining the concepts of cooperative diversity and opportunistic relaying. The cooperative relaying protocol is based on two diversity mechanisms, incremental redundancy combining and repetition combining. We assume that nodes in the large multihop network are modeled by a homogeneous Poisson Point Process and operat...

This paper presents a general method for calculaling the average error rates and outage performance of a broad class of coherent, differentially coherent and noncoherent communication systems with/without diversity reception in a myriad of fading environments. Unlike the moment generating function (MGF) technique, the proposed characteristic function (CHF) method based on Parseval's theorem ena...

Cooperative diversity is a newly proposed virtual MIMO technology based transmission technique achieving diversity gain through a combination of the relayed signal and the directly transmitted signal. In this paper, we made a comprehensive study to elucidate the performance of a single-relay cooperative OFDM system under Amplify-and-Forward (AAF) and Decode-and-Forward (DAF) relaying strategies...