Cyclic prefix for non-contiguous signal transmission
A non-continuous, signal technology, applied in the transmission system, digital transmission system, electrical components, etc., can solve the problem that the sequence cannot be used
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[0018] As briefly mentioned above, the use of a cyclic prefix attached to the start of each transmitted OFDM symbol allows the receiver to treat the received symbol as if it were a cyclic convolution of the transmitted symbol and the communication channel response. This simplifies receiver processing in many cases. For example, the use of a cyclic prefix in OFDM applications allows a receiver to demodulate received symbols using a simple Discrete Fourier Transform (DFT) process.
[0019] To implement cyclic convolution in practice, an extended cyclic prefix of length not smaller than the impulse response of the communication channel can be added to the beginning of the transmitted sequence. An example of this operation is shown in Figure 1, where the underlying signal 100 end of 105 Repeat and as a cyclic prefix 110 "attached" to or prefixed to the beginning of the sequence of transmissions shown. The receiver can then extract samples of the received version of the signal ...
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