Modified type LS channel estimation method for OFDM system
A channel estimation and improved technology, applied in the field of communication, can solve the problems of poor bit error performance, low complexity, and high computational complexity, and achieve the effects of simple channel estimation method, low computational complexity, and low time consumption.
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[0025] With reference to Fig. 1, it is the flowchart that the present invention realizes, can find out clearly that the concrete implementation step of this method is as follows from the flowchart:
[0026] 1. At the transmitting end, add a frame synchronization header and two consecutive OFDM training symbols and the cyclic prefix of the OFDM training symbols known to both the receiving and transmitting ends before the OFDM symbol to be sent to form a complete burst packet frame, and transmit machine sent out.
[0027] When the transmitter needs to transmit data, it first performs serial-to-parallel conversion on the binary information to be transmitted; modulates the parallel binary information after the serial-to-parallel conversion, and the modulation can use QPSK or QAM modulation; N data are divided into one group, and N-point IFFT is performed on each group of data to obtain an OFDM data symbol, and then a cyclic prefix of the OFDM data symbol is added in front of the O...
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