IoT enabled communication device with mixer less low complex QPSK based transmitter architecture for low frequency applications
01 Sep 2014-pp 316-321
TL;DR: This paper proposes a mixer less low complex QPSK based transmitter architecture targeting low frequency applications which reduced the complexity in transmitter design.
Abstract: Technological development in the area of wireless communications lead to the requirement of tight integration of both the digital and analog functional units. Integrating mixers is a challenging task, especially in mixed signal design. IoT communication devices require low design complexity as we expect millions of devices connected. In this paper we propose a mixer less low complex QPSK based transmitter architecture targeting low frequency applications which reduced the complexity in transmitter design. A prototype has been developed using Bipolar Junction Transistors (BJTs) and FPGA as the base band controller. The design can easily be adapted to MOSFET technology and modulation is achieved without the need of generating the carrier externally. The prototype developed was tested successfully by generating frequencies of range varying from 1 KHz to 120 MHz. The proposed architecture can also be used for any other digital modulation scheme such as BPSK, FSK etc.
References
More filters
Book•
01 Jan 1978
TL;DR: This best-selling, easy to read book offers the most complete discussion on the theories and principles behind today's most advanced communications systems.
Abstract: This best-selling, easy to read book offers the most complete discussion on the theories and principles behind today's most advanced communications systems. Throughout, Haykin emphasizes the statistical underpinnings of communication theory in a complete and detailed manner. Readers are guided though topics ranging from pulse modulation and passband digital transmission to random processes and error-control coding. The fifth edition has also been revised to include an extensive treatment of digital communications.
3,055 citations
"IoT enabled communication device wi..." refers background in this paper
...QPSK modulation Digital modulation bridges the transmission of digital sym bol into wireless medium [6], [7] & [8]....
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...For a detailed description on the QPSK system, one can refer to [6] & [9]....
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Proceedings Article•
01 Jan 2005
67 citations
"IoT enabled communication device wi..." refers background in this paper
...Different architectures of mixe rs were proposed such as [3] & [4], in which the performance of the mixer has been evaluated....
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03 Jun 2007
TL;DR: In this paper, the authors presented an integrated 2.4 GHz ultra low power CMOS frequency down-converting active mixer based on a single balanced Gilbert-cell resistor-loaded topology where all MOS transistors of mixer core are optimally biased in sub-threshold region.
Abstract: This paper presents an integrated 2.4 GHz ultra low power CMOS frequency down-converting active mixer based on a single balanced Gilbert-cell resistor-loaded topology where all MOS transistors of mixer core are optimally biased in subthreshold region. At only 500 muW DC power consumption under 1.0 V power supply and small LO power of -9 dBm, this mixer has a measured power conversion gain of 15.7 dB and DSB noise figure of 18.3 dB. At same DC power dissipation and LO power, -9 dBm IIP3 and -28 dBm input PldB are obtained while the input return losses at RF and IF ports are better than -20 dB and -8 dB, respectively. Measured LO to IF and LO to RF isolations are more than 22 dB and 33 dB, respectively. With a help of a newly defined figure of merit that contains the effects of conversion gain, noise figure, linearity, LO power, DC power consumption and operating frequency, it is shown that the subthreshold mixer presented here is superior to conventional CMOS mixer designs reported in the literature.
24 citations