Wireless communication

Rate-Maximizing Zero-Forcing Hybrid Precoder for MU-MISO-OFDM

Hybrid precoders, consisting of an analog hardware-constrained part operating at radio frequency (RF) and a digital part operating at baseband, reduce the RF implementation complexity and power consumption of multi-antenna transceivers, at the …

Adaptive pilot allocation for estimating sparse uplink MU-MIMO-OFDM channels

We consider uplink multiuser multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication. The transmit (Tx) side of the envisaged system consists of several single-antenna users or/and several …

Hybrid position and orientation estimation for visible light systems in the presence of prior information on the orientation

Visible light communication (VLC) is seen as a potential access option for fifth-generation (5G) wireless communication (Wang et al., 2014) and (Ayyash et al., 2016) and beyond 5G (Strinati et al., 2019). A reliable VLC system benefits from an …

LoRa signal synchronization and detection at extremely low signal-to-noise ratios

In recent years, LoRa has been deployed in countless Internet of Things (IoT) applications across the globe. However, as LoRa is a proprietary technology, research into its physical-layer performance has been challenging. Implementing LoRa on …

A class of reduced-complexity hybrid precoding algorithms for MU-MISO OFDM transmission

In downstream spatial multiplexing involving multicarrier modulation using a hybrid precoder, several trade-offs have to be made with respect to the hardware complexity of the analog part of the precoder, the computational complexity of the …

Error performance of information decoder for SWIPT with integrated receiver

Simultaneous wireless information and power transfer can be realized by means of an integrated receiver, where both the energy harvester and the information decoder operate on the rectified received signal. We investigate the effect of the …

Optimized precoded spatio-temporal partial-response signaling over frequency-selective MIMO channels

Due to the continuous demand for higher bit rates, the management of the spatio-temporal intersymbol interference in frequency-selective multiple-input multiple-output (MIMO) channels becomes increasingly important. For single-input single-output …

Quantize and forward cooperative communication: channel parameter estimation

Cooperative communication systems can effectively be used to combat fading. A cooperative protocol that can be used with half-duplex terminals is the Quantize and Forward (QF) protocol, in which the relay quantizes the information received from the …

A wireless off-body communication link with receive diversity

The performance of wireless data communication for fully equipped firemen walking indoors and communicating through textile patch antennas integrated into their clothing is evaluated. The small-scale fading experienced in the building is …

Application of channel models to indoor off-body wireless MIMO communication with textile antennas

Off-body data communication for firemen and other rescue workers is an important area of development. The communication with a moving person in an indoor environment can be very unreliable due to the channel fading. By transmitting and receiving …