Obtaining digital representations of multivariate continuous-time (CT) signals is a challenge encountered in many signal processing systems. In practice, these are often acquired to extract some underlying information, i.e., for specific task. Employing conventional task-agnostic analog-to-digital converters (ADCs), typically designed minimize the mean squared error (MSE) reconstructing CT input signal, can be costly and energy-inefficient such cases. this work, we study task-based ADCs,...

Today's communication systems typically use high resolution analog-to-digital converters (ADCs). However, considering future with data rates in the order of 100Gbit/s ADC power consumption becomes a major factor due to sampling rates. A promising alternative are receivers based on 1-bit quantization and oversampling w.r.t. signal bandwidth. Such an approach requires redesign modulation, receiver synchronization, demapping. zero crossing modulation is natural choice as information needs be...

Full-duplex (FD) jamming transceivers recently have been shown to enhance the information security of wireless communication systems by simultaneously transmitting artificial noise (AN) while receiving information. In this paper, we investigate whether FD can also improve system's secrecy energy efficiency (SEE) in terms securely communicated bits per Joule when considering additional power used for and self-interference (SI) cancellation. Moreover, degrading effect residual SI is taken into...

Wireless communications systems beyond 5G are foreseen to utilize the large available bandwidths above 100 GHz. However, power consumption of analog-to-digital converters (ADCs) for such is expected be prohibitively high, because it grows quadratically with sampling rate high amplitude resolutions. Shifting resolution from time domain, i.e., by reducing and employing temporal oversampling w.r.t. Nyquist rate, more energy efficient. To this end, we propose a novel low-cost sub-terahertz...

Next-generation wireless communications systems are anticipated to utilize the vast amount of available spectrum in millimeter-wave and sub-terahertz bands above 100 G Hz meet ever-increasing demand for higher data rates. However, analog-to-digital converter (ADC) power consumption is expected be a major bottleneck if conventional system designs employed at these frequencies. Instead, shifting ADC resolution from amplitude domain time by employing 1-bit quantization temporal oversampling...

The next generation of mobile communication system will allow a plethora new services and use cases. By offering support for high throughput connections, low latency response massive number the fifth network trigger applications unseen in any other network. However, one important application scenario is not being properly addressed by players responsible networks' standardization, that remote rural areas This requires large cells with throughput, flexibility to opportunistically exploit free...

A promising approach to reducing the energy consumption is consider coarse quantization at receiver. In this study, we investigate novel precoding techniques in space and time for bandlimited multiuser MIMO downlink channels with 1-bit oversampling receiver, considering zero-crossing modulation. The proposed time-instance modulation conveys information into time-instances of zero-crossings. Two design criteria are investigated, namely, minimum distance decision threshold mean-square error...

In this work, we investigate the spectral efficiency (SE) of a system where transmitter utilizes zero crossing modulation (ZXM), which was implemented by combining faster-than-Nyquist signaling with runlength-limited transmit sequences, and receiver employs 1-bit quantization temporal oversampling. The SE is evaluated numerically respect to fractional power containment bandwidth, allows for amount out-of-band emissions. contrast most existing works, practical implementation under wideband...

This work focuses on providing robust line-of-sight (LoS) spatial multiplexing at flexible communications distances and directions. Considering oblique LoS uniform linear arrays, we first derive the rank-deficient orthogonal conditions for MIMO channel matrices. With this discovery, topology of high spatial-resolution one side link is shown with a wide full-rank-channel guarantee interval over distance direction variations. Additionally, to reduce implementation costs power consumption,...

In wideband large-scale antenna systems, the received signal at individual antennas can correspond to different transmit symbols due high bandwidth and large array dimensions. This effect is known as spatial effect. this work we seek answer question if oversampling, i.e., employing multiple receive antennas, or temporal oversampling for systems 1-bit quantization receiver yields a better performance under line-of-sight channel model. A comparison utilizing maximum posteriori symbol detection...

In this work we study the secrecy energy efficiency (SEE) of a multiple-input-multiple-output multiple-antenna eavesdropper (MIMOME) wiretap channel, in terms securely communicated bits-per-Joule, where legitimate receiver is equipped with full-duplex (FD) capability. particular, seek answer to question: if and how application an FD jammer can enhance system SEE, considering additional power consumption used for jamming self-interference cancellation, as well degrading effect residual...

Fifth generation of mobile communication networks will support a large set new services and applications. One important use case is the remote area coverage for broadband Internet access. This has significant social economical impact, since considerable percentage global population living in low populated does not have access infrastructure rural areas can be used to improve agrobusiness productivity. The aim this paper analyze performance SG transceiver Remote Areas, implemented on field...

In this work, we investigate the energy efficiency (EE) of future wireless communications systems. We argue that operating at high bandwidth and a comparatively low signal-to-noise ratio (SNR) is beneficial in terms EE. Furthermore, discuss how employing single-carrier modulations combined with 1-bit quantization temporal oversampling receiver enables energy-efficient wideband Our main contribution to compare EE such system an idealized conventional under various assumptions on ADC power...

Utilizing 1-bit quantization at the analog-to-digital converter (ADC) is a promising approach to reduce problematically high power consumption of resolution ADCs in millimeter-wave (mmWave) and sub-terahertz (THz) communications. However, as highly nonlinear operation standard channel estimation algorithms cannot be applied. Therefore, we study for receivers with under consideration two-wave diffuse (TWDP) fading model, which was shown realistic model indoor communications mmWave regime. We...

The use of low-resolution quantization is a promising approach to reduce the power consumption analog-to-digital converters (ADCs) future wireless communications systems. In this work, we investigate multiuser MIMO downlink scenario with 1-bit and temporal oversampling at receivers. information encoded in zero-crossings (ZXs) such systems, concept which known as zero-crossing modulation (ZXM). ZXM could enable energy-efficient internet things (IoT) or wideband systems operating on...

Acquiring digital representations of multivariate continuous-time (CT) signals is a challenge encountered in many signal processing systems. In practice, these are often obtained order to extract some underlying information, i.e., for specific task. Employing conventional task-agnostic analog-to-digital converters (ADCs) can be inefficient such cases. this work, we study task-based ADCs designed obtain representation CT input process recover an random parameter vector, referred as the The...

In this work, we consider the acquisition of stationary signals using uniform analog-to-digital converters (ADCs), i.e., employing sampling and scalar quantization. We jointly optimize pre-sampling reconstruction filters to minimize time-averaged mean-squared error (TMSE) in recovering continuous-time input signal for a fixed rate quantizer resolution obtain closed-form expressions minimal achievable TMSE. show that TMSE-minimizing filter omits aliasing discards weak frequency components...

Wireless communications systems beyond 5G are expected to utilize large available bandwidths at frequencies above 100 GHz in order achieve data rates Gbit/s. However, the power consumption of analog-to-digital converters (ADCs) for such is becoming a major challenge. Trading reduced amplitude resolution an increased temporal by employing oversampling w.r.t. Nyquist rate possible solution this problem. In work, we consider wireless system zero-crossing modulation (ZXM) and 1-bit quantization...

Cognitive radio (CR) is considered an enabler of wireless technologies in safety-critical applications such as connected mobility and industrial automation, due to its high reliability resource efficiency. Here, accurate fast estimation the quality channel crucial CR's adaptive capability. In this paper, we propose a architecture that devises novel metric based solely on physical layer (PHY) measurements. The proposed utilizes decision tree PHY sub-metrics, without decoding packets at higher...