Digital receiver for a signal generated with discrete multi-tone modulation
View Patent ↗A digital receiver for receiving DMT signals includes a time-domain equalizer that includes a digital filter having fixed coefficients.
1. A digital receiver for receiving an input signal produced using discrete multitone modulation, said receiver comprising:
an analog/digital converter to which the input signal is supplied, and
a time-domain equalizer connected downstream from the analog/digital converter, the time-domain equalizer including a digital filter having fixed coefficients, wherein the fixed coefficients of the digital filter have values that can be represented by shift operations.
2. The digital receiver as claimed in claim 1 , wherein the fixed coefficients of the digital filter have integer values.
3. The digital receiver as claimed in claim 1 , wherein the digital filter has a zero at 0 Hz.
4. The digital receiver as claimed in claim 1 , wherein the digital filter is a high-pass filter.
5. The digital receiver as claimed in claim 1 , wherein the digital filter comprises a series of circuits, each of the circuits having a plurality of first-order digital filters.
6. The digital receiver as claimed in claim 5 , wherein each first-order digital filter comprises:
a state memory,
a shift register,
a subtraction circuit, and
an addition circuit.