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A 2.4-GHz Ternary Sequence Spread Spectrum OOK Transceiver for Reliable and Ultra-Low Power Sensor Network Applications.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Nov2017, Vol. 64 Issue 11, p2976-2987. 12p. - Publication Year :
- 2017
-
Abstract
- The ON/OFF keying (OOK) transmitter is re-investigated to utilize its structural simplicity and low power features for the reliable, ultra-low power sensor network applications. A novel architecture of 2.4-GHz ternary sequence spread spectrum (TSSS) OOK transceiver with spreading gain, spur suppression, and dual-mode detection techniques is presented. A random bi-phase operation of a power amplifier rejects the intrinsic spur of spread spectrum OOK transmitter by 22 dB. A proposed TSSS-OOK transmitter supports a variable spread spectrum, such as 1 b to 4 chips (1/4), 3/8, and 5/32 and a dual reception of the coherent as well as non-coherent mode, achieving 12-dB SNR gain. For the power optimized frequency synthesis, both a phase locked loop (PLL) and a frequency locked loop (FLL) are merged with a single voltage controlled oscillator as a dual-precision frequency synthesizer, where the high-precision PLL is activated for the coherent reception and the low power, moderate precision FLL is activated for the non-coherent reception. The single-chip transceiver in 90-nm CMOS occupies an active area of 2.4 mm2 and measures 1Mb/s, 22-dB spur-suppressed output spectrum, 5.5% EVM, and a sensitivity of −81 dBm at non-coherent mode and −93 dBm at coherent mode, dissipating 2.17 mW at TX and 0.614 mW at RX. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RADIO transmitter fading
*SIGNAL-to-noise ratio
*PHASE-locked loops
Subjects
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 64
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 125951876
- Full Text :
- https://doi.org/10.1109/TCSI.2017.2704420