A novel single-bit input all digital synchronizer and demodulator baseband processor for fast frequency hopping system

Tsai, Fu-Ting; Lee, Chen‐Yi

doi:10.1109/iscas.2001.922188

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…In order to simplify the derivation, the degradation of the signal power caused by the Gaussian filtering and the limited channel bandwidth is ignored. If a narrow band modulation is assumed, the baseband signal power is (7) where is frequency deviation. By combining (5) and (7), the baseband SNR can be derived to be interesting to observe that the baseband SNR decreases rapidly with respect to noise bandwidth around 1 MHz, which is the value we concerned.…”

Section: A Operation Principlementioning

confidence: 99%

A Low-Power 2.4-GHz CMOS GFSK Transceiver With a Digital Demodulator Using Time-to-Digital Conversion

Chen¹,

Yang²,

Huang³

et al. 2009

IEEE Trans. Circuits Syst. I

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A technique of time-to-digital conversion is utilized in a digital demodulator for a low-power 2.4-GHz CMOS GFSK transceiver. The proposed time-to-digital converter (TDC) employs a self-sampling technique and an auto-calibration algorithm to avoid edge synchronization problems and the need of a delay-locked loop (DLL). With the TDC, a limiter and a digital demodulator can be employed simultaneously in the receiver to achieve low power consumption and high performance. Additionally, in the transmitter, the open-loop VCO modulation is adopted to save hardware and power consumption. The transmitter frequency drift in open-loop modulation and frequency offset between the receiver and the transmitter can be easily resolved by the proposed receiver architecture. All required building blocks of the proposed transceiver, except a RF matching network and a crystal, were implemented on a 4-mm 2 chip by a 0.18-m CMOS process. The receiver achieves 89-dBm sensitivity at 0.1% BER with 1-Mb/s data rate, and the transmitter delivers up to 0-dBm output power. The receiver and transmitter consume 13.3 mA and 10.7 mA, respectively, from a 1.8-V power supply. Index Terms-Complex bandpass filter, demodulator, frequency synthesizer, low-noise amplifier (LNA), open-loop VCO modulation, time-to-digital converter (TDC).

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Section: A Operation Principlementioning

confidence: 99%