Baseband Analog Circuits for Software Defined Radio

Giannini, Vito; Craninckx, Jan; Baschirotto, A.

doi:10.1007/978-1-4020-6538-5

Cited by 43 publications

(27 citation statements)

References 79 publications

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“…In addition, each of the OTA served in the filter is realized in arrays, and is power scalable along with bandwidth requirements. More sub-arrays would be enabled for high frequency modes [2].…”

Section: A Complex Band-pass Filter (C-bpf)mentioning

confidence: 99%

A multi-mode reconfigurable analog baseband with I/Q calibration for GNSS receivers

Zheng

Chi

et al. 2014

2014 19th Asia and South Pacific Design Automation Conference (ASP-DAC)

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A multi-mode reconfigurable analog baseband with I/Q calibration for GNSS receivers is presented. The baseband circuit consists of an I/Q calibration circuit, a reconfigurable complex band-pass filter (C-BPF) and an AGC loop. It provides I/Q mismatch auto-calibration with the aid of a FPGA. The 3 rd / 5 th -order reconfigurable C-BPF supports various bandwidths from 2.2 to 10MHz and with different center frequencies from 3.996 to 16MHz. The AGC loop features 5-50dB gain range and 1dB step, and digital AGC algorithms. The auto DC-offset cancellation is also integrated on-chip. The analog baseband circuit has been implemented in 180nm CMOS and consumes 6.5-13mA variable current thanks to the power scaling technique. The measured image-rejection ratio is 45-55dB, improved by 22dB after I/Q calibration.

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Section: A Complex Band-pass Filter (C-bpf)mentioning

confidence: 99%

A multi-mode reconfigurable analog baseband with I/Q calibration for GNSS receivers

Zheng

Chi

et al. 2014

2014 19th Asia and South Pacific Design Automation Conference (ASP-DAC)

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“…Evolusi teknologi tersebut menjadikan naiknya penggunaan data. Sebuah penelitian melaporkan bahwa 50% panggilan suara dan lebih dari 70% trafik data terselenggara di dalam ruangan atau bangunan [1].…”

Section: Pendahuluanunclassified

Implementasi Bat Algorithm dalam Optimasi Penempatan Femtocell

Fath¹,

Laksana

Sirait

2018

JRE

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Abstrak-Femtocell dinilai menjadi kunci utama dalam teknologi telekomunikasi untuk meningkatkan kapasitas sistem selular dengan cara memperkecil dimensi sel. Pada umumnya, jaringan femtocell dirancang untuk diletakkan di dalam ruangan tertutup. Peletakan femtocell dinilai menjadi isu penting untuk menyelesaikan permasalahan perancangan jaringan nirkabel oleh karena perancangan manual dinilai sangat tidak efisien. Dalam penelitian ini, dilakukan sebuah pendekatan untuk menyelesaikan permasalahan penempatan femtocell yang terletak di dalam ruangan menggunakan bat algorithm. Tujuan utama dari penelitian ini adalah untuk menentukan letak femtocell yang optimal sehingga dapat memaksimalkan nilai SNR. Dalam 100 kali percobaan, optimasi yang digunakan mampu meningkatkan rerata SNR sebesar 34,89 dB. Hal ini menunjukkan bahwa pendekatan yang dilakukan adalah sangat efektif dan efisien. Kata kunci: bat algorithm, femtocelll, optimasiAbstract-Femtocell has been considered as an important technology to increase the cellular system capacity by bringing the base station closer to the user and shrinking the cell dimension. Basically, femtocell networks are deployed in indoor environment such as an office. Thus, femtocell placement problems are one of the important issues in planning the wireless networks, since the manual planning processes are not efficient. In this paper, the solution of femtocell placement problem in an indoor environment is solved by bat algorithm. Selecting the best position of the femtocell is the main objective so the capacity can be maximized. In a 100 trial study, the SNR can be optimized up to 34.89 dB. In conclusion, the bat algorithm is able to improve the SNR efficiently and effectively.

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“…Ongoing advancements in communication technology and constant improvements in the performance=price ratio of radiofrequency (RF) devices continue to present numerous advantages in the field. [1,2] However, most NMR spectrometers currently available are equipped with complex solid-state electronics, making for difficult comprehension of architecture and repair of problems occurring in the devices. In this study, a laboratory-built desktop NMR spectrometer was constructed, which is anticipated to present considerable advantages in education and research.…”

Section: Introductionmentioning

confidence: 99%

Construction of a Prototype Laboratory-Built Desktop NMR Spectrometer

Yin

Wang

et al. 2011

Instrumentation Science & Technology

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& A hardware system for a laboratory-built desktop nuclear magnetic resonance (NMR) spectrometer was constructed with a module design based on single-phase detection architecture. This spectrometer features an operating frequency of DC to 100 MHz, RF pulse power of 0.7244 mW to 1.2589 W, minimum detectable signal of 1.5136 Â 10 À10 mW, and receiver bandwidth of 20 kHz. Verification of the functional feasibility of NMR detection was implemented using a 30-mL custom probe in a 0.23-T magnetic field. A baseband free induction decay was also acquired through the application of an RF pulse at 1 W for 10 ls. The observed initial amplitude and frequency of the MR signal are 1.47 V and 1.25 kHz, respectively. Meanwhile, the effective transverse relaxation time (T Ã 2 ) for this configuration declines to no more than 15 ms because no shimming treatments were taken. The proposed desktop NMR spectrometer is suitable for building a hand-made NMR spectrometer in the laboratory, and enhances opportunities for novel and exciting NMR experiments.

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Baseband Analog Circuits for Software Defined Radio

Cited by 43 publications

References 79 publications

A multi-mode reconfigurable analog baseband with I/Q calibration for GNSS receivers

A multi-mode reconfigurable analog baseband with I/Q calibration for GNSS receivers

Implementasi Bat Algorithm dalam Optimasi Penempatan Femtocell

Construction of a Prototype Laboratory-Built Desktop NMR Spectrometer

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