Patent ID: 8731093
Filing Date: 2014-05-20
Classification: H04B,H04L

Abstract:
1. A communication system with a data-dependent superimposed training mechanism, comprising: a transmitter, comprising: a receiver, arranged for receiving the transmitted data, and removing the cyclic prefix, and then executing a discrete Fourier transform to perform a channel estimation, and then performing a frequency domain equalization and an inverse discrete Fourier transform before performing a demodulation process, so as to restore the transmitted data; wherein, the precoding matrix is an N×N unitary matrix comprised of a Q×Q precoding sub-matrix, and Q is equal to a block size N divided by a channel length, and the precoding matrix distributes the modulation data uniformly on the frequency domain, and any two sets of data precoded by the precoding matrix must be different from each other, such that the receiver can identify the transmitted data and reduce a computational complexity of the receiver effectively; wherein the precoding sub-matrix is comprised of a discrete Fourier transform matrix and a diagonal matrix having a perfect sequence of diagonal elements; wherein the perfect sequence has the same gain of frequency domain and time domain.