Analysis on Joint Timing and Carrier Frequency Offset Estimation Algorithm for M-CPFSK
Haiying Zhang · Radio Engineering · 2011
The existing joint timing and carrier frequency offset estimation algorithm resolves only the synchronization problem of orthogonal M-ary continuous phase frequency shift keying(M-CPFSK)signal,but it can not be used for nonorthogonal M-CPFSK signal directly.To solve this problem,power transformation is pre-processed for baseband sampled signal of the nonorthogonal M-CPFSK,which modifies the modulation index and makes the signal meet the requirement of orthogonality in the joint estimation algorithm.The new algorithm realizes accurate estimation of synchronization for nonorthogonal M-CPFSK signal.Theoretical analysis and simulation are presented for the estimation performance in additive white Gaussian noise channels.Both the simulation and analysis show the efficiency and feasibility of the joint estimation algorithm.