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This paper describes the Data Acquisition (DAQ) architecture for the DEAP-3600 experiment at SNOLAB in Ontario, Canada, which is searching for Weakly Interacting Massive Particles. (WIMPs). The identification of the WIMP is based on the rejection by signal discrimination of the beta decays from the liquid 39Ar composing the detector volume (3600kg). The Data Acquisition is based on commercial electronics...
In most contemporary phase lock loops (PLLs) used in high-datarate wireless receivers, some or all of the PLL’s components are implemented digitally, in particular the PLL’s loop filter. In this chapter we develop the theory behind new efficient structures for the implementation of loop filters within FPGAs (Field Programmable Gate Arrays) using fixed-point arithmetic. The theory is then investigated...
In this paper we present new and efficient carrier phase detector structures for M-PSK (M-ary Phase Shift Keying). The phase detectors are NDA (Non Data Aided) and are shown to have the following advantages: (1) they have an efficient fixed-point hardware implementation; (2) they require only 1 sample/symbol; (3) the phase detectors are not dependent upon the signal amplitude and are resilient to...
This paper presents an ultra-low-cost wireless communications laboratory that is based on a commercial off-the-shelf field programmable gate array (FPGA) development board that is both inexpensive and available worldwide. The total cost of the laboratory is under USD $200, but it includes complete transmission, channel emulation, reception (coherent and noncoherent), and probing capabilities. Over...
Coherent demodulation in digital wireless communications involves generating a local carrier that is in phase with the received carrier, and then using this local carrier in order to coherently demodulate the received signal. Generation of the local carrier is done via a carrier synchronization Phase Lock Loop (PLL). The receiver also includes a symbol timing synchronization PLL, whose purpose is...
In this paper we shall present an NDA (non data aided) adaptive carrier phase detector for coherent M-PSK receivers operating in AWGN (additive white Gaussian noise). It shall be shown that the detector allows the carrier synchronization PLL (phase locked loop) to achieve optimal performance during both the acquisition and tracking operation modes. The conditions necessary for this optimatity to be...
We present a channel SNR (Signal-to-Noise Ratio) estimator for D-MPSK (Differential M-ary Phase Shift Keying) in AWGN (Additive White Gaussian Noise). The estimator is shown to have the following advantages: (1) the estimator has a compact fixed-point hardware implementation; (2) it requires only 1 sample/symbol; (3) accurate estimates can be generated in real-time; (4) the estimator is resistant...
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