6 papers
Approximation of the Range Ambiguity Function in Near-field Sensing Systems
Marcin Wachowiak, André Bourdoux, Sofie Pollin
This paper investigates the range ambiguity function of near-field systems where bandwidth and near-field beamfocusing jointly determine the resolution. First, the general matched…
Sizing Antenna Arrays for Near-field Communication and Sensing
Marcin Wachowiak, André Bourdoux, Sofie Pollin
This paper presents key performance metrics for near-field communication and sensing systems and their scaling behavior as a function of the antenna array aperture. Analytical expr…
Analysis of the Range Ambiguity Function of Narrowband Near-field MIMO Sensing
Marcin Wachowiak, André Bourdoux, Sofie Pollin
This paper compares the sensing performance of a narrowband near-field system across several practical antenna array geometries and SIMO/MISO and MIMO configurations. For identical…
Frequency Diverse Array OFDM Transmit System with Partial Overlap in Frequency
Marcin Wachowiak, André Bourdoux, Sofie Pollin
A frequency-diverse array (FDA) is an alternative array architecture in which each antenna is preceded by a mixer instead of a phase shifter. The mixers introduce a frequency offse…
Beamforming with Oversampled Time-Modulated Arrays
Marcin Wachowiak, André Bourdoux, Sofie Pollin
The time-modulated array (TMA) is a simple array architecture in which each antenna is connected via a multi-throw switch. The switch acts as a modulator switching state faster tha…
Frequency Diverse Array OFDM System for Joint Communication and Sensing
Marcin Wachowiak, André Bourdoux, Sofie Pollin
The frequency-diverse array (FDA) offers a time-varying beamforming capability without the use of phase shifters. The autoscanning property is achieved by applying a frequency offs…