TPS decoder for DVB-T television system and receiver using the same
AssigneeSunplus Technology Co., Ltd.
InventorChun-Chieh Tseng
Life of this patent
Estimating the term…
Abstract
A TPS decoder for a DVB-T digital television system includes an input signal estimator, a masking device, a vector index determinator and a lookup table device. The input signal estimator receives a plurality of frequency-domain input signals and a plurality of channel measure signals to thereby produce a plurality of estimated input signals. The masking device performs a masking operation on the estimated input signals to thereby produce a plurality of masking signals. The vector index determinator is based on the masking signals to determine a vector index corresponding to the frequency-domain input signals. The lookup table device is based on the vector index to produce a codeword.
Claims10
A Transmission Parameter Signaling (TPS) decoder, for a Digital Video Broadcasting-Terrestrial (DVB-T) television system, comprising:
- an input signal estimator, for receiving a plurality of frequency-domain input signals and a plurality of channel measure signals to produce a plurality of estimated input signals, wherein the frequency-domain input signals correspond to TPS signals from a frame and the estimated input signals produced by the input signal estimator are expressed as:
- EST
- q
- ,
- m
- =
- ∑
- l
- =
- 2
-
- d
- l
- q
-
- ∑
- k
-
- b
- k
- ·
- Re
-
- {
- y
- l
- ,
- k
- m
- ·
- (
- H
- ^
- l
- ,
- k
- )
- *
- }
- ,
- where ESTq,m indicates the estimated input signals, Yl,km indicates the frequency domain input signals, Ĥl,k indicates the channel measure signals, bk=a1m, and
- d
- l
- q
- =
- ∏
- i
- =
- 2
- l
-
-
- a
- i
- q
- in which akq indicates vector parts corresponding to the frequency domain input signals in transmission, and q=20, . . . , 267;
- a masking device, connected to the input signal estimator, for performing a masking operation on the estimated input signals to produce a plurality of masking signals;
- a vector index determinator, connected to the masking device, for determining a vector index corresponding to the frequency-domain input signals according to the masking signals;
- and
- a lookup table device connected to the vector index determinator for producing a codeword according to the vector index.
Dependencies are inferred from the claim text.