Patent ID: 9608700
Date: 2017-03-28
CPC Classifications: H03G,H04B,H04L,H04W

Claim:
1. A wireless device for transmitting a signal via at least a first antenna and a second antenna, the wireless device comprising: a generator to generate at least a first known signal used for demodulation of first data, a second known signal used for demodulation of second data, and a third known signal used for demodulation of third data, wherein the first known signal is to be transmitted via at least the first antenna, the second known signal is to be transmitted via at least the first antenna, the third known signal is to be transmitted via at least the second antenna, the second known signal is to be transmitted at a frequency, the third known signal is to be transmitted at the frequency, the second known signal and the third known signal have a relation of cyclic shift in time domain, the first known signal is to be transmitted at a first time by a first transmission method, the second known signal and the third known signal are to be transmitted at a second time by a second transmission method, wherein the second time is different from the first time and the second transmission method is different from the first transmission method, the second transmission method comprises a space division multiplexing transmission method, and the first transmission method comprises a first method other than the space division multiplexing transmission method.