RECEPTION DEVICE, RECEPTION METHOD, AND PROGRAM
The present technology relates to a reception device, a reception method, and a program therefor that enable improvement in reception performance when information on a frequency band in which no data is transmitted is known. The reception device receives a broadcast wave of an OFDM signal transmitted from a transmission device at a broadcast station that is not shown. A transmission parameter interpretation unit acquires band information indicating a “no signal” band contained in transmitted control information. An interference rejection filter unit performs filtering at least when a signal with a level higher than a predetermined level is detected on the basis of the band information from the transmission parameter interpretation unit. The disclosed technology can be applied to a reception device that receives OFDM signals, for example.
1 . A reception device comprising:
an acquiring unit configured to acquire band information indicating a “no signal” band contained in transmitted control information; and
a filtering unit configured to perform filtering when at least a signal with a level higher than a predetermined level is detected on the basis of the band information.
2 . The reception device according to claim 1 , wherein the filtering unit always performs filtering on the basis of the band information.
3 . The reception device according to claim 1 , wherein the filtering unit performs filtering only when a signal with a level higher than a predetermined level is detected on the basis of the band information.
4 . The reception device according to claim 1 , wherein there are at least two types of bandwidth of the band indicated by the band information, the types being a narrowband smaller than a predetermined bandwidth and a broadband equal to or larger than the predetermined band.
5 . The reception device according to claim 4 , wherein the filtering unit always performs filtering when the bandwidth of the band indicated by the band information is information on the broadband.
6 . The reception device according to claim 5 , wherein the filtering unit always performs filtering also when the bandwidth of the band indicated by the band information is information on the narrowband.
7 . The reception device according to claim 1 , wherein the reception device receives a transmitted OFDM signal according to DVB-C2, and the control information is L1 information of DVB-C2.
8 . The reception device according to claim 1 , wherein the filtering unit is arranged upstream of an FFT computing unit configured to convert an OFDM signal in time domain to an OFDM signal in frequency domain.
9 . The reception device according to claim 8 , wherein the filtering unit is arranged before the FFT computing unit.
10 . The reception device according to claim 8 , wherein the filtering unit is arranged before an AGC unit configured to perform gain control on an IF signal.
11 . A reception method for a reception device, comprising:
acquiring band information indicating a “no signal” band contained in transmitted control information; and
performing filtering when at least a signal with a level higher than a predetermined level is detected on the basis of the band information.
12 . A program causing a computer to function as:
an acquiring unit configured to acquire band information indicating a “no signal” band contained in transmitted control information; and
a filtering unit configured to perform filtering when at least a signal with a level higher than a predetermined level is detected on the basis of the band information.