Digital and Analog Solution for Low-Power Multi-Band Sensing

2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)

Hollevoet

et al. 2010

Self Cite

Spectrum sensing is a key aspect in the realization of opportunistic radios, which will allow a significantly more efficient usage of the scarce spectrum resources. This paper presents a solution to upgrade mobile devices with spectrum sensing capabilities. A versatile digital component is proposed to meet a wide variety of use cases, at low cost and low power overhead. Complementary reconfigurable analog front-ends make the radio ready for upgrading wireless connectivity thanks to availability of information on spectrum occupancy.

Section: Demonstrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Versatile Spectrum Sensing on Mobile Devices?

Dejonghe

2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)

Hollevoet

et al. 2010

Self Cite

“…Since the basic task of a spectrum sensing engine is to scan all frequency bands for the presence of signals with several possible bandwidths, the functionality of the analog front-end actually requires the use of a Software-Defined Radio (SDR). The flexible analog frontend is implemented with the Scaldio RF IC, demonstrated at Dyspan 2010 [2]. Scaldio is a fully reconfigurable analog transceiver implemented in 40nm CMOS technology [1].…”

Section: A Flexible Analog Front-endmentioning

confidence: 99%

An integrated reconfigurable engine for multi-purpose sensing up to 6 GHz

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)

Hollevoet

Wesemael

et al. 2011

Self Cite

We demonstrate a reconfigurable engine for multipurpose spectrum sensing within the cost and power constraints of mobile devices. The analog part builds up on the Scaldio reconfigurable analog front-end [1]. The digital part is an innovative Digital Front-end for Sensing capable of performing a range of sensing algorithms [3], which has now been fully implemented as a chip. The goal of this demo is the first demonstration of the digital chip, integrated with an analog front-end, enabling real-time validation of the sensing engine. The setup is validated for DVB-T and LTE, two important candidates for future DySPAN networks, as well as for very fast spectrum sweeping. This is the first integrated low power solution that can achieve such a very fast spectrum sweeping, thanks to the integration of two innovative components.

“…The 10 bits 65Ms/S ADC functionality is integrated on chip, which enables a small form-factor prototype. The RFIC is implemented in 40nm CMOS technology and was used as a sensing SDR front-end in earlier DySPAN demonstrations [5] [6]. is the increased resilience to out-of-band blockers.…”

Section: A Spider Boardmentioning

confidence: 99%

Interference robust SDR FE receiver

Wesemael

2012 IEEE International Symposium on Dynamic Spectrum Access Networks

Desmet

et al. 2012

Self Cite

Research on Dynamic Spectrum Access (DSA) has focused to a large extent on the reliable detection of signals at very low power levels, possibly even under the noise floor. However, many of those channels that are detected to be free are adjacent to used channels, with possibly very large power levels. As a result, the true DSA problem is not only reliable detection of free bands, but also robust operation next to used bands. In this demo we demonstrate an SDR RFIC which is robust against outof-band interference. This robustness is achieved by improving the linearity of the SDR receiver significantly. The need for robustness is demonstrated in real time by showing the received constellation diagram of an 802.11af-like OFDM signal in the presence of a large out-of-band interferer. The wanted and interfering signal are received simultaneously by two generations of SDR RFIC's, showing both the performance degradation caused by interference from adjacent bands and the improvement enabled by the robust receiver.I.