Novel Rx IQ mismatch compensation considering laser phase noise for CO-OFDM system
The IQ mismatch, channel distortion and phase noise are compensated simultaneously. The initial channel transfer and IQ mismatch factors can be estimated separately. The new channel transfer factor is updated on a symbol by symbol. The laser phase noise is compensated without additional pilot subcarriers. The proposed method has a high tolerance of the amplitude and phase mismatches.
rx iq mismatch compensation laser phase noise coherent optical orthogonal frequency division multiplexing system