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CMS moved into LHC data taking mode on November 2009. In order to store, distribute, process and analyze the experiment data, the CMS collaboration relies on a Grid-based system of distributed computing resources. Such resources are organized in “Tiers” and, in particular, Tier-2’ sareregional level centersdevoted to support Montecarlo production and Physics analysis. GRIF, a distributed Tier-2 built...
Unipolar forms of orthogonal frequency division multiplexing (OFDM) such as DC biased optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM) are widely used in intensity-modulated and direct detection (IM/DD) systems. At low data rate, ACO-OFDM is more efficient in terms of optical power but it suffers from spectral inefficiency. For large constellations, DCO-OFDM with large DC...
This paper presents a fully integrated 60GHz transceiver module in a 65nm CMOS technology for wireless high-definition video streaming. The CMOS chip is compatible with the WirelessHD™ standard, covers the four channels and supports 16-QAM OFDM signals including the analog baseband. The ESD-protected die (9.3mm2) is flip-chipped atop a High Temperature Cofired Ceramic (HTCC) substrate, which receives...
A complete frequency synthesizer occupying 1.1 mm2 in 65 nm CMOS is presented. It is composed of a push-push quadrature VCO that delivers two L0 signals in 20 and 40 GHz bands. The PLL consumes 80 mW including buffers, and achieves a phase noise lower than -100 and -97.5 dBc/Hz for the 20 GHz and the 40 GHz signals, respectively.
Satellite digital TV broadcast reception today requires a multiple low-noise block (multi-LNB) head on the dish, as well as a multi-tuner set-top box (STB). Connecting multiple outdoor units (ODU) to the set-top boxes traditionally needed multiple cables. A first step has been achieved with so-called satellite channel stacking switchTM technology (CSS), able to deliver the full suite of TV programs...
For an efficient data taking, the electromagnetic calorimeter (ECAL) data of the CMS experiment must be limited to 10% of the full event size (1 MB). Other requirements limit the average data size to 2 kB per data acquisition link. These conditions imply a reduction factor of close to twenty on the data collected. The data filtering in the readout of the ECAL detector is discussed. Test beam data...
A DVB-T tuner is integrated in 0.12 /spl mu/m CMOS. The 16mm/sup 2/ chip integrates a double conversion chain including PLL, VCO, voltage regulators, and ADC. The receiver exhibits a 6.5dB NF, a VCO phase noise of -140dBc/Hz at 1MHz offset at 1.21GHz, and a 14b ADC. It is compatible for integration with a digital demodulator IP.
A fully CMOS integrated DVB_T RF analog tuner achieving a 6.5 dB noise figure is presented. The tuner is implemented in a 0.12 mum CMOS process and occupies a 16 mm2 area. The receiver is based on a double zero IF conversion and integrates within the receiver chain the frequency synthesizers and two 4 MHz bandwidth 14 bit analog digital converters. The VCO exhibits a -140 dBc phase noise at 1 MHz...
This paper describes the selective read-out processor (SRP) proposed for the electromagnetic calorimeter (ECAL) of the CMS experiment at LHC (CERN). The aim is to reduce raw ECAL data to a level acceptable by the CMS DAQ system. For each positive level 1 trigger, the SRP is guided by trigger primitive generation electronics to identify ECAL regions with energy deposition satisfying certain programmable...
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