Patent ID: 9537701
Date: 2017-01-03
CPC Classifications: H04L

Claim:
1. A joint estimation and compensation method of RF imperfections in a LTE uplink system, comprising steps: establishing a joint signal model with RF imperfections; according to said joint signal model, undertaking an initial CFO (Carrier Frequency Offset) estimation of a received signal in a time domain so as to estimate CFO parameters and compensate said received signal; undertaking a joint estimation of direct-c determining modulation data to acquire an original transmitted signal; determining whether error vector magnitude converges: if yes, estimating gain mismatch parameters and phase mismatch parameters of said joint signal model according to said imbalance parameters; and if no, using a decision-directed symbol to undertake iterative CFO estimation and compensation so as to undertake further estimation and compensation of said Imperfections until said error vector magnitude converges; and estimating gain mismatch parameters and phase mismatch parameters of said joint signal model according to said imbalance parameters.