This letter proposes a compensation method that can alleviate the problem of I/Q mismatch generated in the direct-conversion receiver of OFDM systems. In the proposed method, the amount of I/Q mismatch is estimated using null-carriers in transmitted signals, and it is subtracted from received symbols to suppress I/Q mismatch effects. Simulations show experiments that the proposed method can effectively eliminate the I/Q mismatch effects.
- Direct-conversion receiver
- I/Q imbalance
- I/Q mismatch
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering