Angan Das

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In this work, we present a genetic algorithm based automated circuit synthesis framework for passive analog circuits. A procedure is developed for the simultaneous generation of both the topology and the component values for analog circuits comprising of R, L and C elements, from a given set of specifications. The novelty of the work pertains to two(More)
This paper introduces a graph grammar based approach to automated topology synthesis of analog circuits. A grammar is developed to generate circuits through production rules, that are encoded in the form of a derivation tree. The synthesis has been sped up by using dynamically obtained design-suitable building blocks. Our technique has certain advantages(More)
This paper presents an automated analog synthesis tool for topology generation and subsequent circuit sizing. Though sizing is indispensable, the paper mainly concentrates on topology generation. A new kind of GA is developed, where a fraction of the offsprings in each generation is built from building blocks or cells obtained from previous generations. The(More)
  • A. Das, J. Ng
  • 2008
32-amplitude and phase-shift-keying (32APSK) is one of the modulation schemes proposed in the 2nd generation digital video broadcasting over satellite (DVB-S2) standard. This paper presents a non-data-aided (NDA) SNR estimation scheme for 32APSK using the expectation-maximization (EM) algorithm. Two variants of the EM algorithm are presented, first with an(More)
— This paper presents ATLAS-a framework for automated analog circuit synthesis that comprises of both topology generation and subsequent circuit sizing. A hierarchically arranged building block or cell library is used in this regard. The adaptively formed library starts only with basic elements and gradually includes functionally useful and bigger blocks,(More)
Topology design of computer networks is a constrained optimization problem for which exact solution approaches do not scale well. This paper introduces a self-learning, non-greedy optimization technique for network topology design. It generates new solutions based on the merit of the preceding ones. This is achieved by maintaining a solution library for all(More)
Microelectrodes have been developed over the last few years with tip diameters of 1-10 um, but they are fragile and susceptible to electrical interference. In addition, they are difficult to manufacture and operate, and are often unsuitable for measurement in small volumes of liquid or in soils. This limits their use to specialized laboratories under highly(More)
— This paper introduces a fuzzy logic based guidance architecture to a graph grammar framework for automated design of analog circuits. The grammar generates circuit topologies through a derivation tree. To boost this tree based synthesis mechanism, smaller building blocks in the form of subtrees have been used for the purpose. These blocks have been(More)
Multiple antenna enhancements via symbol timing relative offsets (MAESTRO) was recently introduced as a scheme to improve the performance of a V-BLAST like multi-antenna system by introducing sub-symbol timing offsets between the transmit antennas. In this paper we address the role of receiver structure on performance and investigate the optimal choice of(More)