Title :
Implementation of reception and real-time decoding of ASDM encoded and wirelessly transmitted signals
Author_Institution :
Inst. of Electron. & Comput. Sci., Riga, Latvia
Abstract :
This paper describes an implementation of reception and real-time decoding of Asynchronous Sigma-Delta modulator (ASDM) encoded and wirelessly (On-off keying) transmitted signals. By using Fast reconstruction algorithm it is possible to reconstruct the original signal ≈ 25 times faster than by Classical reconstruction algorithm, if the signal lenght is 1 second, and ≈ 61, ≈ 130 and ≈ 228 times faster, if the length of the signal is 2, 4 and 8 seconds, respectively. Developed overall system consists of 3 parts - superheterodyne receiver, digitizer, PC with adaptive data reconstruction algorithm. Real-time decoding algorithm, which consist of data acquistion, filtering, processing, reconstruction and vizualization is implemented in LabView as a virtual instrument with graphical user interface (GUI).
Keywords :
amplitude shift keying; data acquisition; data visualisation; decoding; electro-oculography; electrocardiography; electroencephalography; electromyography; filtering theory; graphical user interfaces; medical signal detection; medical signal processing; sigma-delta modulation; signal reconstruction; signal sampling; virtual instrumentation; ASDM encoded reception; GUI; LabView; PC-with-adaptive data reconstruction algorithm; asynchronous sigma-delta modulator; biopotential; data acquisition; data filtering; data processing; data reconstruction; data visualization; digitizer; electrocardiography; electroencephalography; electromyography; electrooculography; fast reconstruction algorithm; graphical user interface; real-time decoding algorithm; signal reconstruction; signal-dependent sampling; superheterodyne receiver; virtual instrument; wirelessly transmitted signals; Decoding; Graphical user interfaces; Real-time systems; Reconstruction algorithms; Sigma-delta modulation; Wireless communication; Wireless sensor networks; asynchronous sigma delta modulator; real-time decoding; signal-dependent sampling; time encoding;
Conference_Titel :
Radioelektronika (RADIOELEKTRONIKA), 2015 25th International Conference
Conference_Location :
Pardubice
Print_ISBN :
978-1-4799-8117-5
DOI :
10.1109/RADIOELEK.2015.7129020
