FPGA Implementation of an Amplitude-Modulated Continuous-Wave Ultrasonic Ranger Using Restructured Phase-Locking Scheme

المؤلفون المشاركون

Janakiraman, P. A.
Sumathi, P.

المصدر

VLSI Design

العدد

المجلد 2010، العدد 2010 (31 ديسمبر/كانون الأول 2010)، ص ص. 1-11، 11ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2010-03-11

دولة النشر

مصر

عدد الصفحات

11

التخصصات الرئيسية

العلوم الهندسية و تكنولوجيا المعلومات

الملخص EN

An accurate ultrasonic range finder employing Sliding Discrete Fourier Transform (SDFT) based restructured phase-locked loop (RPLL), which is an improved version of the recently proposed integrated phase-locking scheme (IPLL), has been expounded.

This range finder principally utilizes amplitude-modulated ultrasonic waves assisted by an infrared (IR) pilot signal.

The phase shift between the envelope of the reference IR pilot signal and that of the received ultrasonic signal is proportional to the range.

The extracted envelopes are filtered by SDFT without introducing any additional phase shift.

A new RPLL is described in which the phase error is driven to zero using the quadrature signal derived from the SDFT.

Further, the quadrature signal is reinforced by another cosine signal derived from a lookup table (LUT).

The pulse frequency of the numerically controlled oscillator (NCO) is extremely accurate, enabling fine tuning of the SDFT and RPLL also improves the lock time for the 50 Hz input signal to 0.04 s.

The percentage phase error for the range 0.6 m to 6 m is about 0.2%.

The VHDL codes generated for the various signal processing steps were downloaded into a Cyclone FPGA chip around which the ultrasonic ranger had been built.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Sumathi, P.& Janakiraman, P. A.. 2010. FPGA Implementation of an Amplitude-Modulated Continuous-Wave Ultrasonic Ranger Using Restructured Phase-Locking Scheme. VLSI Design،Vol. 2010, no. 2010, pp.1-11.
https://search.emarefa.net/detail/BIM-454978

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Sumathi, P.& Janakiraman, P. A.. FPGA Implementation of an Amplitude-Modulated Continuous-Wave Ultrasonic Ranger Using Restructured Phase-Locking Scheme. VLSI Design No. 2010 (2010), pp.1-11.
https://search.emarefa.net/detail/BIM-454978

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Sumathi, P.& Janakiraman, P. A.. FPGA Implementation of an Amplitude-Modulated Continuous-Wave Ultrasonic Ranger Using Restructured Phase-Locking Scheme. VLSI Design. 2010. Vol. 2010, no. 2010, pp.1-11.
https://search.emarefa.net/detail/BIM-454978

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-454978