Frederik Naessens

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This paper describes the implementation of an energy-efficient digital SDR baseband platform. The multi processor system-on-chip (MPSOC) is implemented in 90nm CMOS technology and occupies 32mm2. It incorporates all digital signal processing required by the physical layer of the WiFi(802.11n), WiMax(802.16e), mobile TV and 3GPP-LTE standards. The(More)
Multi-gigabit LDPC decoders are demanded by standards such as IEEE 802.11ad and IEEE 802.15.3c. In order to achieve high throughput, most published multi-gigabit designs use row-paralleled architecture. In this paper, we proposed a half-row paralleled LDPC decoder with half layer level pipeline and single permutation network for the 802.11ad standard, which(More)
The continuously increasing number of communication standards to be supported in nomadic devices combined with the fast ramping design cost in deep submicron technologies claim for highly reusable and flexible programmable solutions. Software defined radio (SDR) aims at providing such solutions in radio baseband architectures. Great advances were recently(More)
New air interfaces are currently being developed to meet the high spectral efficiency requirements of the emerging wireless communication systems. Multicarrier code-division multiple access (MC-CDMA) is seen as a promising candidate for the fourth-generation (4G) cellular communication systems because it can interestingly deal with the multipath propagation(More)
This paper describes the implementation of a flexible Turbo and LDPC outer modem engine which is capable of supporting the WiFi(802.11n), WiMax(802.16e) and 3GPPLTE standard on the same hardware resources. The chip is implemented in a 65nm CMOS technology and occupies 10.37 mm<sup>2</sup>. The decoder flexibility is offered by means of an(More)
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(More)
Spectrum sensing received a lot of attention as a key aspect in the realization of opportunistic radios. Even today, there is a strong belief in the community that the cost and performance of sensing solutions don't meet the stringent requirements of Opportunistic Spectrum Access (OSA). In this paper, the cost and measured performance of a sensing solution(More)
The spectrum data-mining and agile air interface requirements of cognitive radios claim for software-defined-radio (SDR) implementations. The need to detect and/or generate virtually any kind of waveform in any band pushes the specification of such SDR to the limit. This makes cost-effective and energy-efficient implementation very challenging. As a first(More)
One of the key enablers for cheaper and faster time to market for next generation radios are software defined radios. However to reach an energy efficient but yet programmable solution for different radio standards, requires the designer to trade-off the right flexibility to programmability. In this paper we introduce IMEC's SDR platform which is capable of(More)
Wireless communication standards are developed at an ever-increasing rate of pace, and significant amounts of effort is put into research for new communication methods and concepts. On the physical layer, such topics include MIMO, cooperative communication, and error control coding, whereas research on the medium access layer includes link control, network(More)