Symbiotic radio (SR) backscatter is a possible low-power wireless communication technique for future Internet of Things devices. In this letter, multiple-input-multiple-output (MIMO) SR system proposed, where the secondary multi-antenna transmission from device (BD) to receiver riding on primary transmitter receiver. We investigate beamforming design optimization problem which maximizes sum cap...

In recent years, the remarkable promise of multiple-antenna techniques has motivated an intense research activity devoted to characterizing the theoretical and practical issues associated with multiple-input multiple-output wireless channels. This activity was first focused primarily on single-user communications but more recently there has been extensive work on multi-user settings. The aim of...

Inspired by recent advances in multiple-input multiple-output (MIMO) communications, this proposal introduces the statistical MIMO radar concept. To our knowledge, this is the first time that the statistical MIMO is being proposed for radar. The fundamental difference between statistical MIMO and other radar array systems is that the latter seek to maximize the coherent processing gain, while s...

Orthogonal Frequency Division Multiplexing (OFDM) is a popular method for high data rate wireless transmission. Combining OFDM with antenna arrays at the transmitter and receiver enhances the capacity gain. This paper proposes a novel transmit power allocation for Coded MultiInput Multi-Output Multi-Carrier Modulation (MIMO-MCM). This technique consists of adapting the power allocation in the s...

We study the effect of pricing on the secrecy capacity of multi-terminal networks. We propose a linear and a non-linear pricing function for user terminals and present mathematical formulations to maximize the individual secrecy capacity of each transmitter-receiver pair as well as the sum secrecy capacity of the system. We show that these pricing models result in better energy efficiency and a...

Mode-division multiplexing (MDM) can increase the capacity of direct-detection short-reach systems in proportion to the number of modes employed. MDM requires compensation of modal crosstalk at a transmitter or receiver by the multi-input multi-output (MIMO) signal processing. We show that the channel estimation required for the MIMO processing in a basis of modes can be expressed as a phase re...

Multi-Input Multi-Output (MIMO) transmission technique, in which both transmitter and receiver are equipped with multiple antennas, is attracting attention due to its many advantages such as its throughput improvement. For this reason, various cellular mobile radio systems based on MIMO have been developed such as 3GPP LTE (Long Term Evolution) [1] and Mobile WiMAX [2]. MIMO technique is also a...

Continuing advances in radar technology are driven both by new application regimes and technological innovations. A family of applications of increasing importance is detection of a mobile target intruding into a protected area, and one type of radar system architecture potentially well suited to this type of application entails a network of cooperating radars. In this paper, we study optimal r...

The paper deals with the downlink of mobile radio systems, where in each cell an access point communicates with a number of mobile terminals, and where both the access point and the mobile terminals are equipped with multi-antennas. Therefore, the entirety of all downlink connections of each cell constitute a multi-user MIMO system. The considered downlink transmission technique is the recently...

In traditional over-the-horizon radar (OTHR), multipath propagation due to the multilayer ionospheric structure always deteriorates the detection performance. The properties of multipleinput multiple-output (MIMO) radar technique, which transmits wide beams with low gain at the transmitter and achieves receiver beam-forming to obtain narrow beams with high gain, make it an ideal choice for OTHR...