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This paper describes the proposed architecture and the analytical optimization of an ultra-low-power and high sensitivity Resonant Micromechanical Receiver (RMR) to be used in wake-up radios. The proposed radio frequency (RF) system is composed of three different stages: (1) a piezoelectric resonator that provides for passive voltage amplification, impedance matching, and high-Q filtering; (2) a MEMS...
This paper describes a method to increase the sensitivity of a digital radio receiver based on the time synchronous averaging (TSA). The data to be send are grouped into a block and the block is retransmitted multiple times. Received blocks are synchronously averaged thus increasing the signal-to-noise ratio. The TSA can be performed on the analog signal at the demodulator output (soft TSA) or on...
This paper presents an ultra-low power, high-sensitivity, and interference-resistant receiver suitable for IoT applications. By the combination of sliding-IF based low-power down-conversion and relative-power-detection based FSK demodulation, the proposed receiver achieves multi-channel operation and minimizes power consumption. Cascaded N-path filter and 4th-order hybrid-PPF are adopted to improve...
A 433 MHz 54 µW wake-up receiver that supports OOK/FSK/PSK demodulation schemes is proposed. Injection-locking and superregenerative reception provide the capabilities of demodulation and linear amplifications with superior sensitivity and high energy efficiency. For a data rate of 200 kbps and a BER < 0.1%, the proposed receiver achieves sensitivity of − 80/−78/−77 dBm under OOK/FSK/PSK schemes,...
This paper presents a low-power, long-range 433MHz transceiver designed for 2-FSK modulation at 1kbps in 8 different physical channels capable of communicating with a Texas Instruments CC1101. Designed in a 130nm CMOS process with an area of 1.1mm2, the transmitter's output power is 0dBm and the receiver has a sensitivity of −102dBm producing a link budget >100dB and a theoretical range >5km...
This paper suggests 60 GHz non-coherent OOK receiver which is a strong candidate for 5G near filed communications in Korea. The receiver consists of a fully differential envelop detector and a limiting amplifier. The measured receiver shows 32 dB peak gain at −28 dBm input power level. The sensitivity of the receiver is measured −25 dBm under 3 Gbps data rate. The proposed receiver is fabricated with...
A 400MHz 10Mbps differential BPSK (D-BPSK) receiver (RX) is presented. This RX adopts a proposed reference-less dynamic phase-to-amplitude demodulation scheme, which converts signal phase transition to distinct amplitude variation. The proposed RX can support a data rate up to 10Mbps. It achieves −63dBm sensitivity at 0.1% BER and draws 1.77mW in 0.18µm CMOS.
Wireless sensor networks(WSN) demand low power and low cost transceiver design. In this paper, an integrated transceiver system has been designed and fabricated using a 0.13µm CMOS process for ultra low power WSN applications. The system integrates an OOK receiver, a transmitter, RF/DC switches and a voltage regulator which provides comprehensive on-chip biasing circuitry in a 2×2mm2 chip. A common...
Dual component systems share energy to optimize tracking and data-down-load, but usually omit acquisition considerations. This paper proposes a new concept that makes all the energy available for pilot, all available for tracking and download, but vastly enhances acquisition sensitivity and TTFF.
We demonstrate simultaneous demodulation of multiple 40 Gbit/s WDM NRZ-DPSK channels using a single silicon microring resonator with FSR of 100 GHz. Bit error measurements show very good performances for both through and drop demodulations for all channels.
The circulator is usually used in UHF RFID front end circuit to isolate the leakage from Tx to Rx, however, due to the insufficient of the circulator in isolation, there is still a lot of CW signal leaking into the Rx circuit inevitably. LNA is abnegated in order to prevent the demodulator from saturation, which will degrade the receive sensitivity and the dynamic range of the receive circuit. A case...
Since the coherent receivers are not feasible to implement low-cost ultra-wideband (UWB) impulse radio (IR) devices featuring extremely low power consumption, energy detector-based (ED-based) noncoherent receivers are more and more frequently chosen. The Pulse Polarity Modulation (PPM) scheme with a threshold compensated receiver is a promising candidate for the implementation of cheap and robust...
An ultrawideband transceiver employing chirp pulse modulation is proposed for LDR communication. In contrast to the Gaussian pulse, a transmitted pulse modulated with different chirps can maximize the transmitted energy under low supply voltage and is thus amenable to the voltage scalability of the advanced CMOS technologies. The binary data is encoded with different chirp frequencies and two identical...
Demodulation of M-ary quadrature amplitude modulation (M-QAM) requires the receiver to estimate the phase and amplitude of the received signal. The demodulator performance is sensitive to errors in these estimates, and the sensitivity increases as M increases. We examine the effects of phase and amplitude errors on the performance of QAM communication systems with error-control coding and soft-decision...
This paper describes a bit-synchronous superregenerative receiver suitable for BPSK demodulation. The output of the superregenerative oscillator (SRO), which reproduces the phase information of the input signal, is directly sampled by a D flip flop clocked by a signal derived from the quench waveform. Analytical background on the response of the SRO to a BPSK modulated input is presented. A PSpice...
The lossy nature of the rectification circuitry is the main source of performance degradation in a non-coherent On-Off Keyed (OOK) receiver. Through the optimization of a multi-stage LNA design operating in weak inversion and the use of a power matched voltage doubler circuit, a 1.0 V, 1.5 mW low power OOK receiver is fabricated using 0.13 um CMOS technology. To facilitate data transfer at up to 100...
We propose and experimentally demonstrate a novel coding scheme for a WDM-PON system using ASK/DPSK re-modulation corresponding to downstream/upstream signals respectively to enhance the toleration of injection signal extinction ratio.
A low-power FM-UWB receiver front-end for low data rate (100 kbps) short-range (<10 m) applications operating in the upper UWB band at 7.45 GHz is described. The front-end comprises a 21 dB gain preamplifier and a 1GHz bandwidth FM demodulator. The measured receiver sensitivity is -86.8 dBm while consuming 9 mW from a 1.8 V supply and -84.3 dBm is achieved at 6 mW power consumption. The 0.88 mm...
This paper addresses the performance limits of the IEEE 802.15.4 standard 2.4 GHz PHY for wireless personal area and sensor networks. As designers start considering the addition of power amplifiers to improve link margin, other methods that do not increase power significantly are of high value. Minimizing power consumption is the key goal of 802.15.4 systems, and improvements in sensitivity can be...
Correlative minimum shift keying (MSK), a second order polynomial modulation scheme known as tamed frequency modulation (TFM), is a constant envelope type of modulation with a perfect peak to average power ratio (PAPR), besides the property of low out of band power. We apply the linearized TFM to the single carrier transmission with frequency domain equalization (SC/FDE) concept. We then obtain a...
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