Baseband system for a wireless receiver and baseband signal processing method thereof

A baseband system to be used in a wireless receiver for processing an original in-phase and quadrature-phase (IQ) signal pair that contains first sequence information, second sequence information and third sequence information, said baseband system comprising:

• an estimation and compensation circuit for receiving the original IQ signal pair, estimating frequency-independent non-ideal effects based on the first and second sequence information of the original IQ signal pair, and compensating the original IQ signal pair based on a result of the estimation to obtain a compensated IQ signal pair;
• a channel estimation and equalization circuit coupled to said estimation and compensation circuit for receiving the compensated IQ signal pair, and performing channel estimation and equalization based on the compensated IQ signal pair to obtain an equalized IQ signal pair;
• and
• a tracking and compensation circuit coupled to said channel estimation and equalization circuit for receiving the equalized IQ signal pair, obtaining a result of tracking of residual quantities of the frequency-independent non-ideal effects based on a portion of the equalized IQ signal pair that corresponds to the third sequence information, and compensating the equalized IQ signal pair based on the result of the tracking to obtain an output IQ signal pair.