Hardware implementation and VLSI design of spectrum sensor for next-generation LTE-A cognitive-radio wireless network

Hardware implementation and VLSI design of spectrum sensor for next-generation LTE-A cognitive-radio wireless network

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This paper presents reconfigurable and hardware-efficient VLSI architecture of time domain cyclostationary-feature detector (TCD) for spectrum sensing in the cognitive-radio wireless network. It incorporates new architecture for autocorrelator that supports the entire range of subcarriers used by orthogonal frequency division multiplexing signals compliant to 4G LTE-Advanced wireless network. A novel scheme of overflow/underflow protection is proposed for the coordinate rotation digital computer engine of TCD. Additionally, hardware-efficient techniques have been introduced for the multiply-&-accumulate and accumulator architectures of suggested TCD design. Real-world signals are captured using universal software radio peripheral devices and are fed to its FPGA prototype. An application specific integrated circuit synthesis and post-layout simulation of the proposed detector have been performed using 65 nm-CMOS technology and it occupies 0.32 mm2 of core area and consumes total power of 18.5 mW at 100 MHz clock frequency. In comparison with the state-of-the-art works, the proposed detector requires 34 and 93% lesser hardware resource and memory, respectively

Inspec keywords: cognitive radio; next generation networks; Long Term Evolution; AWGN channels; 4G mobile communication; integrated circuit layout; OFDM modulation; CMOS integrated circuits; application specific integrated circuits; software radio; VLSI; radio spectrum management; wireless sensor networks; signal detection; field programmable gate arrays

Other keywords: real-world signals; accumulator architectures; size 65.0 nm; frequency 1.0 MHz; universal software radio peripheral devices; spectrum sensor; FPGA; rotation digital computer engine; frequency 100.0 MHz; signal-to-noise ratios; multiply-&-accumulate architecture; OFDM signals; field programmable gate array; orthogonal frequency division multiplexing; united-microelectronics-corporation complementary metal–oxide–semiconductor technology; spectrum sensing; application specific integrated circuit synthesis; TCD design; time 5.12 ms; hardware-efficient very large-scale integration architecture; clock frequency; power 18.5 mW; VLSI design; additive white Gaussian noise channel environment; post-layout simulation; hardware-efficient techniques; OFDM-based communication system; autocorrelator; 4G LTE-Advanced; next-generation LTE-A cognitive-radio wireless network; overflow-underflow protection; performance analysis; time-domain cyclostationary-feature detector

Subjects: Modulation and coding methods; Signal detection; CMOS integrated circuits; Mobile radio systems; Semiconductor integrated circuit design, layout, modelling and testing; Logic circuits; Wireless sensor networks


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