Digital front-end design for ofdm receivers with synchronous if sampling

Yih Min Chen, I. Yuan Kuo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Orthogonal frequency-division multiplexing (OFDM) is a favored technique in digital broadband wireless communications due to its easiness in combating highly dispersive transmission channels. In an OFDM receiver using traditional superheterodyne radio-frequency (RF) front-end, the analog intermediate- frequency (IF) output signal is sampled and converted to a digital IF signal at an IF sampling rate adhering to the bandpass sampling theorem. Since the existence of carrier and the difference in sampling rate, a digital front-end which incorporates spectral shifting and sampling rate conversion is required to convert the digital IF signal to a complex baseband signal at a baseband sampling rate adequate for succeeding OFDM demodulation. In this paper, we discuss the design of the digital front-end for superheterodyne OFDM receivers when the IF sampling rate is synchronous to the time base of the transmitter.

Original languageEnglish
Pages (from-to)469-479
Number of pages11
JournalInternational Journal of Electrical Engineering
Issue number6
StatePublished - Dec 2008


  • Digital front-end
  • IF sampling
  • OFDM


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