1/f baseband noise suppression in OFDM systems

Shay Landis, Ben Zion Bobrovsky

Research output: Contribution to journalArticlepeer-review

Abstract

The commonly used direct-conversion Radio Frequency (RF) chips exhibit an additive 1/f baseband noise around the DC. The 1/f noise level increases as the transistors inside the RF chip become ever smaller. This type of noise mainly affects the low frequencies and can be very significant for small frequency allocations around the DC in Orthogonal Frequency-Division Multiple Access (OFDMA) systems. In this article we present the effects of such 1/f baseband noise on small frequency allocations for a Long Term Evolution (LTE) User Equipment (UE). We proceed to estimate the 1/f baseband noise. Suppression of the 1/f baseband noise is achieved by subtracting the estimated 1/f baseband noise from the received signal. We show that considerable processing gain is achieved when the 1/f baseband noise suppression is applied.

Original languageEnglish
Article number5708202
Pages (from-to)942-947
Number of pages6
JournalIEEE Transactions on Communications
Volume59
Issue number4
DOIs
StatePublished - Apr 2011

Keywords

  • 1/f noise
  • OFDM
  • baseband noise
  • direct conversion

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