Ultralow Power Injection-Locked GFSK Receiver for Short-Range Wireless Systems

Ye, Rong-Fu; Horng, Tzyy‐Sheng; Wu, Jiming

doi:10.1109/tcsii.2012.2220695

Cited by 5 publications

(8 citation statements)

References 10 publications

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“…7 displays a clear eye diagram with a low peak-to-peak jitter while the receiver demodulates a received 2.4 GHz GFSK signal at a data rate of 1 Mb/s and an input power of 70 dBm. Table I compares the sensitivity and power consumption performance of this work with that of previous ILO-or PLL-based designs for 2.4 GHz GFSK receivers [4], [9], [10]. Obviously, the proposed receiver outperforms the others in reducing power consumption while providing comparable sensitivity.…”

Section: Resultsmentioning

confidence: 94%

“…I NJECTION-locked oscillators (ILOs) are widely used in frequency-shift keying (FSK) RF receivers [1]- [4]. Given the ability to remove a power-hungry phase-locked-loop (PLL)-based carrier recovery circuitry, the ILO-based FSK receivers are feasible for low power and data rate applications, including wireless sensor networks (WSNs) and wireless body area networks (WBANs).…”

Section: Introductionmentioning

confidence: 99%

“…However, despite their potential for low power consumption, these receivers generally incur an insufficient sensitivity due to a limited locking range at low input power levels [2], [3]. In [4], the use of a trifilar transformer splitter in an -ILO-based FSK receiver can significantly improve sensitivity. However, this design consumes large chip area and power consumption and causes a high dc offset.…”

Section: Introductionmentioning

confidence: 99%

“…Fig. 1(a) shows a conventional ILO-based FSK receiver [3], [4]. Via an injection-locking process, the ILO and mixer perform an FM-to-PM and PM-to-AM conversion, respectively, to accomplish a noncoherent FSK demodulation.…”

Section: Introductionmentioning

confidence: 99%

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Low Power FSK Receiver Using an Oscillator-Based Injection-Locked Frequency Divider

Horng

2014

IEEE Microw. Wireless Compon. Lett.

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This letter presents a novel frequency-shift keying (FSK) receiver using an oscillator-based injection-locked frequency divider (ILFD), thereby achieving high sensitivity, low dc-offset, and low power consumption. The proposed receiver comprises a low-noise amplifier, a divide-by-2 ring-oscillator-based ILFD, and a subharmonic mixer. Moreover, the proposed receiver is fabricated using 0.18 CMOS process and consumes 1.1 mW. Measurement results demonstrate that the proposed receiver has a sensitivity of 83 dBm at bit error rate with 1 Mb/s data rate in receiving a 2.4 GHz Gaussian FSK signal.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low Power FSK Receiver Using an Oscillator-Based Injection-Locked Frequency Divider

Horng

2014

IEEE Microw. Wireless Compon. Lett.

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“…Consequently, research efforts have been focused on reducing the feature size as well as the power consumption of such transceivers [3][4]. GFSK transmitters can be power-efficient, as the constant envelope characteristics of the GFSK modulation allow the use of energy-efficient nonlinear power amplifiers, enabling a lowpower operation without any data distortion caused by spectral regrowth [5]. However, conventionally, GFSK receivers have a complicated structure and consume larger power.…”

Section: Introductionmentioning

confidence: 99%

A 1.0 V, 5.4 pJ/bit GFSK Demodulator Based on an Injection Locked Ring Oscillator for Low-IF Receivers

Hong

George

et al. 2020

IEEE Access

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This paper presents an ultra-low power, low cost demodulator for gaussian frequency shift keying (GFSK) receivers that use low intermediate frequencies (IF). The demodulator employs a direct IF to digital data conversion scheme by using an injection-locked ring oscillator (ILRO) with a 1-bit flip-flop. It consumes 2.7 μW from a 1.0 V supply at a data rate of 500 kbps achieving an energy efficiency of 5.4 pJ/bit which is 30 times better than that of the recently presented works. The demodulator also achieves 17.5 dB SNR at 0.1 % BER while operating at the same date rate. The demodulator is implemented in a 0.18 μm standard CMOS process and occupies an active area of 0.012 mm 2. INDEX TERMS Demodulator, GFSK, low power, injection locked ring oscillator, low-IF, CMOS.

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Power-Bandwidth Tradeoff for Ultra-Low Power MFSK and G-MFSK Systems

Xiang

Milstein

2023

IEEE Access

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In one of our previous papers, we designed an ultra-low power non-coherent MFSK system using 2-pole bandpass filters to replace matched filters for detection and showed the performance loss between our proposed system and the optimal MFSK system using matched filters for detection was no greater than 1.2 dB in all alphabet size, phase continuity and channel conditions we analyzed. In this paper, we improve our previous design by considering the power-bandwidth tradeoff, and we show that we can save a large percentage of system bandwidth by sacrificing a small amount of power, when the demodulator and coding parameters are optimized. For example, we can save 50% of system bandwidth at the cost of 1 dB loss in performance compared to our previous system design. We further extend the results to include Gaussian filtering, we quantify the performance loss as a function of both the system bandwidth saved and the time-bandwidth product of the Gaussian filter, and we compare the performance of the M -ary GFSK system with the corresponding MFSK system.INDEX TERMS M -ary FSK, M -ary GFSK, multipath fading, ultra-low power-consumption, non-coherent detection, low-complexity filtering, Reed-Solomon codes.

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Ultralow Power Injection-Locked GFSK Receiver for Short-Range Wireless Systems

Cited by 5 publications

References 10 publications

Low Power FSK Receiver Using an Oscillator-Based Injection-Locked Frequency Divider

Low Power FSK Receiver Using an Oscillator-Based Injection-Locked Frequency Divider

A 1.0 V, 5.4 pJ/bit GFSK Demodulator Based on an Injection Locked Ring Oscillator for Low-IF Receivers

Power-Bandwidth Tradeoff for Ultra-Low Power MFSK and G-MFSK Systems

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