Wireless communication method and device for blind detection of downlink signals
摘要
說明書
The time domain characteristics of the preamble signal are described above, and the frequency domain characteristics of the preamble signal are described below.
When a length of a sequence of the preamble signal is M, the sequence of the preamble signal can be mapped to M subcarriers on a first bandwidth in frequency domain, and M is a positive integer.
Alternatively, a value of M is preset.
Alternatively, the first bandwidth is a bandwidth configured by the network device for a terminal device for downlink signal transmission, or the first bandwidth is a bandwidth configured and activated by the network device for the terminal device for downlink signal transmission.
Alternatively, a size of the first bandwidth may be an integer multiple of a sub-band channel detection bandwidth. For example, the sub-band channel detection bandwidth is 20 MHz, and the size of the first bandwidth may be 20 MHz, 40 MHz, 60 MHz, 80 MHz, etc. The sub-band channel detection bandwidth is a unit bandwidth used for channel detection. The preamble signal may be transmitted on each bandwidth with the size of the first bandwidth. That is, when the frequency domain of the unlicensed spectrum is divided into multiple bandwidths according to the size of the first bandwidth, the preamble signal is transmitted on each divided bandwidth.
