System and method for performing channel estimation on an OFDM signal

摘要

Embodiments of systems and methods for performing channel estimation on Orthogonal frequency-division multiplexing (OFDM) signals are described. In one embodiment, a method for performing channel estimation on an OFDM signal involves performing blind channel phase estimation on an OFDM signal to obtain channel phase information and performing blind channel magnitude estimation on the OFDM signal to obtain channel magnitude information. Each of performing blind channel phase estimation on the OFDM signal and performing blind channel magnitude estimation on the OFDM signal involves detecting and suppressing a signal path of the OFDM signal. Other embodiments are also described.

主权项

1. A method for performing channel estimation on an Orthogonal frequency-division multiplexing (OFDM) signal, the method comprising:
performing blind channel phase estimation on the OFDM signal to obtain channel phase information; and performing blind channel magnitude estimation on the OFDM signal to obtain channel magnitude information; wherein each of performing blind channel phase estimation on the OFDM signal and performing blind channel magnitude estimation on the OFDM signal comprises detecting and suppressing a signal path of the OFDM signal, and the method further comprising: determining a number of survival signal paths of the OFDM signal based on the channel phase information and the channel magnitude information; if the number of the survival signal paths is smaller than a threshold, performing coherent demodulation on the OFDM signal; and if the number of the survival signal paths is larger than the threshold, performing differential demodulation on the OFDM signal.