Method for estimating carrier, frequency shifts of orthogonal FDM communication system
A carrier frequency offset and multiplexing communication technology, which is applied in the direction of orthogonal multiplexing system, multiplexing communication, multi-carrier system, etc., can solve the problem of increasing the difficulty of system implementation, difficult ASIC implementation, large amount of calculation, etc. problem, to achieve the effect of easy implementation, small amount of calculation and good effect
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[0032] Embodiment: The method of the present invention is applied to OFDM wireless local area network.
[0033] The application of the present invention in an OFDM wireless local area network transmitting and receiving system is shown in FIG. 3 . After the data at the transmitter is convolutionally encoded, interleaved, and modulated, a specially designed training sequence is first added to the system frame to estimate the frequency offset. Here, since the data sampling point length to be sent in the system frame is 64, the sampling point length of each A training sequence added is 1 4 × 64 = 16 , there are 10 training sequences for class A. According to the relationship between the lengths of training sequences A and B, two training sequences of type B are added, the length of sampling points of each training sequence of type B is 64, and the cyclic prefix of training sequences of type B is...
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