OFDM symbol and frequency synchronization and channel style estimating method
A channel type and frequency synchronization technology, applied in the direction of multi-frequency code system, baseband system components, etc., can solve the problems of long synchronization time, large amount of calculation, and large amount of calculation of integer frequency offset estimation, so as to achieve guaranteed effect and improve synchronization Efficiency and the effect of reducing the number of cross-correlation operations
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[0048]The technical solutions of the present invention will be further described below in conjunction with the drawings and specific implementations. In the description below, Is the smallest integer greater than x, and x is the largest integer less than x.
[0049] The OFDM symbol and frequency synchronization and channel estimation method, as shown in Figure 2, includes the following steps:
[0050] Step 1. The rough position and fractional frequency offset estimation of the OFDM symbol. Suppose the length of the time-domain training sequence is L sampling points, and the interval of the time-domain training sequence is D sampling points. First, the received signal r(t) is down-sampled by N times to obtain the down-sampled received signal r d (t)=r(Nt), where N is an integer, and L + D N is an integer; the relevant length at this time Then use the window length equal to L N The sliding window is receiving ...
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