Title :
Improvement of the reception capability of time dissemination of shortwave broadcasting by digital modulation
Author :
Yang, S.H. ; Lee, Y.K. ; Kwon, T.Y. ; Lee, C.B. ; Lee, S.J.
Author_Institution :
Center for Time & Freq., KRISS, Daejeon, South Korea
Abstract :
KRISS (Korea Research Institute of Standards and Science) has been operating the standard time and frequency broadcasting station (call sign: HLA) since 1984. The station HLA broadcasts continuous time and frequency signals on 5 MHz carrier frequency and 2 kW transmit power. But the poor reception due to radio interference is decreasing users. Therefore to increase the radio reception, a digital modulation method and an increase of bit rate are introduced additionally to the present amplitude-modulated radio signal. We describe a digital modulation method for improving radio reception of the standard time and frequency by shortwave.
Keywords :
modulation; radio broadcasting; radio reception; HLA broadcast; KRISS; amplitude-modulated radio signal; bit rate; digital modulation method; frequency 5 MHz; power 2 kW; radio interference; radio reception capability; shortwave broadcasting; time dissemination; Bit error rate; Digital modulation; Frequency modulation; Spread spectrum communication; Time frequency analysis;
Conference_Titel :
Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International
Conference_Location :
San Fransisco, CA
Print_ISBN :
978-1-61284-111-3
DOI :
10.1109/FCS.2011.5977785
