From: "Nico" <[EMAIL PROTECTED]> > in frontend.h there's no polariziation parameter for ofdm, yet > the few stations transmitting DVB-T streams always specify > H polarization in their specs.
That's how you would install your antenna. Unlike satellite reception, I am not aware of any hardware that would allow control the polarization of your aerial antenna. > Is H the only possible polarization for all DVB-T transmissions? No, it can be transmitted with vertical polarization just as well, and this is actually being done here in Berlin: We have three transmitter locations, of which two are a little bit closer together. Of the 7 channels used here, 3 are transmitted by both of these, but one transmitter will use vertical polarization instead of horizontal to avoid interference. But it doesn't seem to make any difference: My antenna is installed horizontally and can receive all channels perfectly fine (I am located between the mentioned two transmission towers). > Here COFDM will be used; is it any different from the OFDM > used in other countries? Unless I'm mistaken, this is one and the same. OFDM is the transmission method, COFDM the coding used on that transmission method. ETSI 300 744 exclusively mentions OFDM, never COFDM. Regards, -- Robert Schlabbach e-mail: [EMAIL PROTECTED] Berlin, Germany -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
