High-dynamic-range fiber gyro with all-digital signal processing

1991 ◽  
Author(s):  
Herve C. Lefevre ◽  
Philippe Martin ◽  
J. Morisse ◽  
Pascal Simonpietri ◽  
P. Vivenot ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Dynamic Range ◽  
Digital Signal ◽  
High Dynamic Range ◽  
High Dynamic

High Dynamic Range (HDR) Signal Processing on Software-Defined Radio

2020 ◽  
Author(s):  
Phillip V. Do ◽  
Jesse Hernandez ◽  
Zhao Lu ◽  
Danson Evan Garcia ◽  
Steve Mann
Keyword(s):  
Signal Processing ◽  
Software Defined Radio ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
High Dynamic

scholarly journals NULL Convention Floating Point Multiplier

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Anitha Juliette Albert ◽  
Seshasayanan Ramachandran
Keyword(s):  
High Precision ◽  
Dynamic Range ◽  
Digital Signal ◽  
High Dynamic Range ◽  
Floating Point ◽  
Single Precision ◽  
Critical Part ◽  
Point Multiplication ◽  
Null Convention Logic ◽  
High Dynamic

Floating point multiplication is a critical part in high dynamic range and computational intensive digital signal processing applications which require high precision and low power. This paper presents the design of an IEEE 754 single precision floating point multiplier using asynchronous NULL convention logic paradigm. Rounding has not been implemented to suit high precision applications. The novelty of the research is that it is the first ever NULL convention logic multiplier, designed to perform floating point multiplication. The proposed multiplier offers substantial decrease in power consumption when compared with its synchronous version. Performance attributes of the NULL convention logic floating point multiplier, obtained from Xilinx simulation and Cadence, are compared with its equivalent synchronous implementation.

scholarly journals High dynamic range, Interferences Tolerant, Digital Receivers for Radioastronomy: Results and Projects at Paris and Nanay Observatory

2002 ◽  
Vol 199 ◽  
pp. 506-507
Author(s):  
Carlo Rosolen ◽  
Alain Lecacheux ◽  
Eric Gerard ◽  
Vincent Clerc ◽  
Laurent Denis
Keyword(s):  
Real Time ◽  
Dynamic Range ◽  
Block Diagram ◽  
Low Frequency ◽  
Parallel Architecture ◽  
Digital Signal ◽  
High Dynamic Range ◽  
Dsp System ◽  
High Dynamic ◽  
Digital Receivers

Radio astronomy in the decameter to centimeter wavelength range is facing new challenges because of man made interferences due to increasing needs in telecommunications. At the Radioastronomy department of Paris Meudon Observatory, we have been working since four years on high dynamic range digital receivers based on Digital Signal Processors (DSP). The first achievement is a digital spectro- polarimeter devoted to spectroscopy of astrophysical radiation in decameter range, now in operation at the Nancay Decameter array. The block diagram of the receiver includes a high dynamic range analogue section followed by a 12 bits analogue to digital converter. The digital part makes use of high power, programmable digital circuits for signal processing, arranged in a dedicated parallel architecture, able to compute in real time the power spectrum and the correlation of the input signals. This receiver was also used, as spectrometer backend, at Nancay decimetric radiotelescope and has performed very well in the presence of very strong interferences. We are presently working on a new digital receiver with broader bandwidth. The objective is 2 × 25 MHz band with at least 60 dB dynamic range. This new receiver will use additional computation power in order to recognise and avoid man made interferences which corrupt the radio astronomical signal. At the Nancay Radioastronomy Observatory, we have started to develop a new digital configurable receiver with 8 times 25 MHz band and ten thousand channels. For low frequency radioastronomy, direct spectrum computation technique is really powerful and offers new capabilities for real time interferences excision. Fig. 1 shows pulsar observations in the presence of interference made with the DSP receiver on the UTR-2 radiotelescope. Fig. 2 shows the effect of satellite interfernce on OH observations made with the Nancay telescope. Fig. 3 shows the block diagram of the DSP system and demonstrates how offline excision of interference in the frequency time-domain enables recovery of the signal. The final spectrum had 960 minutes integration on and off source and took 8045 minutes of procession on a 450 MHz Pentium II.

High Resolution Noise Radar without Fast ADC

2012 ◽  
Vol 58 (2) ◽  
pp. 135-140 ◽  
Author(s):  
Konstantin Lukin ◽  
Pavlo Vyplavin ◽  
Oleg Zemlyaniy ◽  
Volodymyr Palamarchuk ◽  
Sergii Lukin
Keyword(s):  
Signal Processing ◽  
High Resolution ◽  
Dynamic Range ◽  
Sampling Rate ◽  
High Dynamic Range ◽  
Frequency Noise ◽  
Processing Scheme ◽  
Range Resolution ◽  
Noise Radar ◽  
High Dynamic

High Resolution Noise Radar without Fast ADCConventional digital signal processing scheme in noise radars has certain limitations related to combination of high resolution and high dynamic range. The bandwidth of radar signal defines range resolution of any radar: the wider the spectrum the better the resolution. In noise radar with conventional processing the sounding and reference signals are to be digitized at intermediate frequency band and to be processed digitally. The power spectrum bandwidth of noise signal which can be digitized with ADC depends on its sampling rate. In currently available ADCs the faster is sampling rate the smaller is its depth (number of bits). Depth of the ADC determines relation between the smallest and highest observable signals and thus limits its dynamic range. Actually this is the main bottleneck of high resolution Noise Radars: conventional processing does not enable getting high range resolution and high dynamic range at the same time. In the paper we discuss ways to go around this drawback by changing signal processing ideology in noise radar. We present results of our consideration and design of two types of high resolution Noise Radar which uses slow ADCs: noise radar with digital generation of sounding signal and analog evaluation of cross-correlation and stepped frequency noise radar. We describe main ideas of these radar schemes and results of experimental tests of the approaches.

All-digital signal-processing open-loop fiber-optic gyroscope with enlarged dynamic range

2013 ◽  
Vol 38 (24) ◽  
pp. 5422 ◽  
Author(s):  
Qin Wang ◽  
Chuanchuan Yang ◽  
Xinyue Wang ◽  
Ziyu Wang
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Fiber Optic ◽  
Dynamic Range ◽  
Digital Signal ◽  
Open Loop ◽  
Fiber Optic Gyroscope

scholarly journals Merging-ISP: Multi-exposure High Dynamic Range Image Signal Processing

2021 ◽  
pp. 328-342
Author(s):  
Prashant Chaudhari ◽  
Franziska Schirrmacher ◽  
Andreas Maier ◽  
Christian Riess ◽  
Thomas Köhler
Keyword(s):  
Signal Processing ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Range Image ◽  
High Dynamic Range Image ◽  
High Dynamic
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