Isbn: 9783659527173 - antenna performance in lmr systems using pl tone analysis (6 resultados)

Taschenbuch. Condición: Neu. Antenna Performance in LMR Systems Using PL Tone Analysis | Akshay Kumar (u. a.) | Taschenbuch | 92 S. | Englisch | 2018 | LAP LAMBERT Academic Publishing | EAN 9783659527173 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu. …

Condición: New.

Taschenbuch. Condición: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The in situ or on-site measurement of antenna performance is very challenging in analog Land Mobile Radio (LMR) FM systems. It turns out that the conventional antenna gain measurement techniques are hard and also not quite relevant for understanding the in situ performance. In this work, we present a a novel approach for directly measuring the in situ performance of antennas in analog LMR systems.The procedure involves receiving an FM signal simultaneously using the antenna under test (AUT) and a reference antenna. Both received signals are demodulated to audio using separate but identical receivers. Then a convenient method for characterizing the audio signal quality is to analyze the private line (PL) tone. The PL tone signal-to-noise ratio (SNR) is calculated by measuring the power of the tone relative to the sub-audio noise power. The PL tone SNR for both antenna systems is compared as it provides a 'bottom line' evaluation of the antenna performance. The audio SNR can also be mapped to RF SNR using a theoretical method. From simulation and experimental studies, we conclude that the estimate RF SNR is within 0.5 dB of the actual value for RF SNR values between +3 and +36 dB. 92 pp. Englisch.…

Taschenbuch. Condición: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The in situ or on-site measurement of antenna performance is very challenging in analog Land Mobile Radio (LMR) FM systems. It turns out that the conventional antenna gain measurement techniques are hard and also not quite relevant for understanding the in situ performance. In this work, we present a a novel approach for directly measuring the in situ performance of antennas in analog LMR systems.The procedure involves receiving an FM signal simultaneously using the antenna under test (AUT) and a reference antenna. Both received signals are demodulated to audio using separate but identical receivers. Then a convenient method for characterizing the audio signal quality is to analyze the private line (PL) tone. The PL tone signal-to-noise ratio (SNR) is calculated by measuring the power of the tone relative to the sub-audio noise power. The PL tone SNR for both antenna systems is compared as it provides a 'bottom line' evaluation of the antenna performance. The audio SNR can also be mapped to RF SNR using a theoretical method. From simulation and experimental studies, we conclude that the estimate RF SNR is within 0.5 dB of the actual value for RF SNR values between +3 and +36 dB.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 92 pp. Englisch.…

Condición: New. Print on Demand.

Condición: New. PRINT ON DEMAND.