A time change channel estimating method for OFDM system
A technology of time-varying channel and channel, which is applied in the field of channel estimation of OFDM system, and can solve problems such as noise
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[0084] The following gives a specific implementation method of the patent under the OFDM configuration. It should be noted that the parameters in the following example do not affect the generality of the patent.
[0085] This implementation method uses the simulation tool matlab, set the OFDM useful symbol length to N=512; see the system simulation parameters Figure 6 , See the channel model parameters used Figure 7
[0086] 1. Origination:
[0087] 20 OFDM symbols form a frame (ie, M=20), the number of pilot carriers in the first symbol is 256, and the 4 pilot carriers form a cluster, and each cluster is evenly spaced by 4 carriers. The number of pilot carriers for the remaining symbols is 64. The 4 pilot carriers form a cluster, and each cluster is evenly spaced by 32 carriers. After IFFT transformation, a cyclic prefix of length 144 is added to each OFDM original symbol and transmitted.
[0088] Second, the end
[0089] Perform channel estimation on the received symbols frame ...
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