Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2005-05-03
2005-05-03
Tse, Young T. (Department: 2637)
Pulse or digital communications
Receivers
Interference or noise reduction
C708S313000
Reexamination Certificate
active
06888904
ABSTRACT:
A 108-tap 1:4 interpolation FIR filter device for digital mobile telecommunication having a single bit input that employs a look-up table minimum scheme and a pipeline structure in which the size of the entire look-up tables is significantly reduced by dividing four coefficient groups into three parts, respectively, and effectively using the symmetry of the 108-tap filter coefficient and the symmetry within the look-up table. The FIR filter includes an input shift register and selector for processing a single bit input of four channels, an address generator for producing addresses of the look-up table, look-up table group 0˜3 for producing filter outputs group by group via the look-up table and the calculator using the address as an input, a pipeline register I for delaying the filter outputs for coefficient group which are outputted in parallel, a group selector for converting the delayed outputs in serial channel by channel, and a pipeline register II for matching the time of filter output channel by channel.
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Cho Han-Jin
Kim Kyung-Soo
Lee Suk-Ho
Lim In-Gi
Electronics and Telecommunications Research Institute
Seed IP Law Group PLLC
Tse Young T.
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