The invention provides a large
line width CO-OFDM
phase noise compensation method of time-
frequency domain Kalman filtering. The method comprises the following steps: firstly, performing Kalman filtering on receiving end training symbol data in the
frequency domain, and performing channel
equalization, then dividing each OFDM symbol into a plurality of sub-symbols, performing
time domain extended Kalman filtering at a
pilot frequency sequence in each sub-symbol to obtain a rough
phase noise estimation value of each
time domain sampling point, and compensating the rough
phase noise estimation value; performing linear interpolation between the rough phase
noise estimation values at the last
pilot frequency sequence of the adjacent sub-symbol to obtain the rough phase
noise estimation value of each
time domain sampling point, compensating the rough phase
noise estimation value, and performing pre- judgment after performing phase
noise compensation by using the Avg-BL method; and finally converting the
frequency domain data into the time domain to combine with the initial time domain data after the pre- judgment, performing extended Kalman filtering at each sampling point to calculate a precise phase
noise estimation value, and compensating the precise phase
noise estimation value. The large
line width CO-OFDM phase
noise compensation method has the advantages of better phase noise
equalization effect, good
compensation effect and small calculation complexity.