A New Method for I/Q Impairment Detection and Evaluation in OFDM Transmitters

摘要: Detection and evaluation of impairments in the baseband section (I/Q impairments) orthogonal frequency-division multiplexing digital transmitters are dealt with. A new measurement method is, particular, proposed with aim overcoming key limitations exhibited by already-available approaches, which generally designed for traditional based on I/Q diagram analysis. The is nonintrusive, exploits an analytical model that properly accounts way affect radio frequency output signal, special regard to mirror subcarrier interference, implements original procedure estimate impairment amounts. Aside from describing along fundamental stages procedure, this paper gives details extended experimental activity carried out laboratory signals characterized known order assess performance