Digital broadcasting filler device
A gap filler device for retransmitting at least a portion of an RF signal comprising RF circuitry adapted to receive the RF signal, and digital demodulation circuitry adapted to digitally filter at least a portion of the RF signal.
1 . A gap filler device for retransmitting at least a portion of an RF signal comprising:
RF circuitry adapted to receive the RF signal; and
digital demodulation circuitry adapted to digitally filter at least a portion of said RF signal.
2 . The device of claim 1 wherein the device is a small gap filler (SGF).
3 . The device of claim 1 wherein the RF signal is a mobile digital television (MDTV) broadcast signal.
4 . The device of claim 1 wherein the RF signal is a digital multimedia broadcast (DMB) signal.
5 . The device of claim 1 wherein the RF signal is an Advanced Television System Committee (ATSC) signal.
6 . The device of claim 1 wherein the RF signal is a Forward Link Only (FLO) signal.
7 . The device of claim 1 wherein the RF signal is a Digital Video Broadcast-Terrestrial (DVB-T) signal.
8 . The device of claim 1 wherein the RF signal is a Digital Video Broadcast-Handheld (DVB-H) signal.
9 . The device of claim 1 wherein the RF signal is an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) signal.
10 . The device of claim 1 wherein the RF signal is Satellite and Terrestrial Interactive Multiservice Infrastructure (S-TiMi) signal.
11 . The device of claim 1 wherein said RF circuitry is further adapted to demodulate the RF signal into base-band I and Q components.
12 . The device of claim 1 wherein demodulation comprises zero intermediate frequency (ZIF) demodulation.
13 . The device of claim 1 wherein said demodulation circuitry is further adapted to decode the RF signal into I and Q bit streams.
14 . The device of claim 1 wherein said demodulation circuitry is further adapted to perform channel selection in the RF signal.
15 . The device of claim 1 wherein said demodulation circuitry is further adapted to measure the quality of the RF signal.
16 . A circuit for retransmitting a digital television broadcast (DTV) signal to a mobile device, the circuit comprising:
at least one digital low pass filter adapted to digitally filter the DTV broadcast signal.
17 . The circuit of claim 16 , further comprising at least one analog-to-digital converter (ADC) adapted to decode the DTV broadcast signal into quadrature I and Q bit streams in a digital domain.
18 . The circuit of claim 16 , further comprising at least one digital-to-analog converter (DAC) adapted to convert digitally filtered I and Q bit streams into I and Q components in an analog domain.
19 . The circuit of claim 16 further comprising a quadrature IQ down-converter adapted to demodulate the DTV broadcast signal into base-band I and Q components.
20 . The circuit of claim 16 further comprising an analog low pass filter adapted to filter out undesired out-of-band signals and recover base-band I and Q components in the DTV broadcast signal.
21 . The circuit of claim 16 further comprising a quadrature IQ up-converter adapted to modulate the base-band I and Q components into a carrier frequency of the DTV broadcast signal.
22 . A method for retransmitting at least a portion of an RF signal using a gap filler device comprising:
receiving said RF signal; and
digitally filtering at least a portion of said RF signal.
23 . The method of claim 22 wherein the device is a small gap filler (SGF).
24 . The method of claim 22 wherein the RF signal is a mobile digital television (MDTV) broadcast signal.
25 . The method of claim 22 wherein the RF signal is a digital multimedia broadcast (DMB) signal.
26 . The method of claim 22 further comprising demodulating the RF signal into base-band I and Q components.
27 . The method of claim 22 wherein RF signal is demodulated using zero intermediate frequency (ZIF) demodulation.
28 . The method of claim 22 further comprising decoding the RF signal into I and Q bit streams.
29 . The method of claim 22 further comprising performing channel selection in the RF signal.
30 . The method of claim 22 further comprising measuring the quality of the RF signal.