Equalization in cyclostationary interference, a situation thatoccurs in communication systems where neighboring channels carry digitaldata at similar symbol rates and in which the interference is composedof a few dominant or phase-aligned interferers, is discussed. Aminimum-mean-square performance bound is derived for a continuous-timeinfinite-length decision-feedback equalizer in the presence of multiplecyclostationary interferers and additive white noise. This bound isevaluated in a subscriber-loop system example to show the performanceimprovements that can occur over the situation in which the interferenceis stationary, but has the same mean power spectrum as thecyclostationary interferers. These results show two important techniqueswhich can provide opportunities for improved equalizer performance incyclostationary interference: decreasing the misalignment of the phasesof the transceiver clocks at the central office and usingtransmitter-pulse bandwidths which are wide relative to the symbol rate
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