Patent ID: 8155220
Filing Date: 2012-04-10
Classification: H04L

Abstract:
1. A transmit filter for a stream of OFDM symbols, each symbol being separated into, in sequence, symbol data and a guard interval having guard data comprising first Tg data in a first interval and second Tg data in a subsequent interval, the transmit filter comprising: a remapper configured to receive said stream of OFDM symbols and generate an output signal; an infinite impulse response (IIR) filter having an output and an input coupled to said remapper to filter the output signal; and a controller having an output and an input coupled to the output of said IIR filter, said remapper accepting said symbol data, said first Tg data and said second Tg data, thereafter generating the output signal comprising, in sequence, said first Tg data, said second Tg data, and said symbol data, and said controller accepting a stream of filtered data from said IIR filter, said stream of filtered data including filtered first gap data, filtered second gap data, and filtered symbol data, said controller generating the output having, in sequence, said filtered second gap data, said filtered symbol data, and a copy of said filtered second gap data.