Citation link:
Authors:
Илиев, Илия Тонев; Iliev, Ilia Tonev; Цолов, Ангел Белчев; Colov, Angel Belchev; Неделчев, Марин; Nedelchev, Marin
Title:
Модем за комуникации в аналогови самоорганизиращи се УКВ PMR радиомрежи
Other Titles:
Modem for communications in Adhoc UHF PMR networks
Date of Issue:
2008
Is Part of:
Proceedings of the Technical University – Sofia, 58(1), 2008, pp. 135-144
Publisher:
Технически университет - София
Identifiers:
1311-0829 [issn]
Type:
Article
Language:
bul
Abstract:
The paper presents a proposition and research of a communication modem in the licensed band for PMR radio networks in half-duplex mode. The modem uses PSK modulation in baseband utilizing Manchester coding. In order to icrease the noise performance, it uses diversity transmitting according to schematics (2,3) or (3,5). Theoretical equations are derived for the noise performance in AWGN channels. It is proposed an algorithm for the demodulator and a general model of the communication system is created. These allow researching the noise performance of the modem. The theoretical results are compared to the measured.
Description:
Рец. доц. д-р Михаил Момчеджиков. - Съдържа диагр, таблици, схеми и формули. – Библиогр., с. 144.
