Patent ID: 8223906

Claim:
A process for filtering a stream of symbols prior to transmission, each symbol having, in sequence, a symbol value followed by a guard interval having a first Tg value followed by a second Tg value, the process comprising the steps: remapping said symbol value, said first Tg value, and said second Tg value into, in sequence, said first Tg value, said second Tg value, and said symbol value; upsampling, by an upsampler, said first Tg value, said second Tg value, and said symbol value by inserting one or more zero values between sampled values of said first Tg value, said second Tg value, and said symbol value; applying said upsampled values to an IIR filter which has a reset signal for initializing at least one of a plurality of registers of said IIR filter, said IIR filter thereby generating, in sequence, a filtered first Tg value, a filtered second Tg value, and a filtered symbol value, asserting the reset signal of said IIR filter during said first Tg value input to said IIR filter; and outputting said filtered second Tg value, said filtered symbol value, and a copy of said filtered second Tg value.