Passive Electrical and Optical Methods of Ultra-Short Pulse Expansion for Event Timer-Based TDC in PPM Receiver
Electronics 2023
Artūrs Āboltiņš, Tatjana Solovjova, Jānis Semeņako, Romāns Kušņins, Sandis Migla, Pauls Ēriks Šics, Oskars Šēlis, Nikolajs Tihomorskis, Dmitrijs Prigunovs, Armands Ostrovskis, Sandis Spolītis

The energy efficiency of a communication system using pulse position modulation (PPM) can be increased by reducing the duration of the pulses transmitted over the communication channel to several tens of picoseconds. The employment of an event timer device as a time-to-digital converter (TDC) for demodulation allows the use of PPM with many pulse positions and achieves competitive data transfer speeds. However, along with several-picosecond accuracy of modern event timers, they require a pulse duration of several hundred picoseconds for precise detection. This research is devoted to developing passive techniques for precise pulse expansion from tens of picoseconds to hundreds of picoseconds. We propose two methods: the electrical method, which employs a microstrip low-pass filter (LPF), and the optical method, which uses fiber Bragg grating (FBG). This research offers a detailed analysis of distortion-free pulse expansion requirements, the design of prototypes meeting these requirements, and experimental design verification. Theoretical background, mathematical models, and results of experimental validation of the proposed pulse expansion methods within the laboratory transmitted reference pulse-position modulation (TR-PPM) communication system are provided.

Atslēgas vārdi
ultra-wideband communication; pulse-position modulation; event timers; Bragg gratings; microstrip filters; electromagnetics; energy efficiency

Āboltiņš, A., Solovjova, T., Semeņako, J., Kušņins, R., Migla, S., Šics, P., Šēlis, O., Tihomorskis, N., Prigunovs, D., Ostrovskis, A., Spolītis, S. Passive Electrical and Optical Methods of Ultra-Short Pulse Expansion for Event Timer-Based TDC in PPM Receiver. Electronics, 2023, Vol. 12, No. 22, Article number 4634. ISSN 2079-9292. Available from: doi:10.3390/electronics12224634

Publikācijas valoda
English (en)
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