Handshaking protocol for time-reversal system

摘要

A handshaking process for time-reversal wireless communication is provided. A first device receives a handshake signal transmitted from a second device through multiple propagation paths, the handshake signal including a preamble and a training sequence, in which the training sequence includes a sequence of symbols known to the first and second devices. A synchronization index is determined based on the preamble, and the training sequence in the handshake signal is identified based on the synchronization index. A channel response signal is determined based on the received training sequence, and a signature waveform that is a time-reversed signal of the channel response signal is generated. A transmission signal is generated based on transmit data and the signature waveform, in which the transmit data are data configured to be transmitted to the second device.

主权项

1. A method comprising:
at a first device, receiving a handshake signal transmitted from a second device through multiple propagation paths, the handshake signal including a preamble and a training sequence, the training sequence including a sequence of symbols known to the first and second devices; determining a synchronization index based on the preamble; identifying the training sequence in the handshake signal based on the synchronization index; determining a channel response signal based on the received training sequence; generating a signature waveform that is a time-reversed signal of the channel response signal; and generating a transmission signal based on transmit data and the signature waveform, the transmit data being data configured to be transmitted to the second device in which determining a channel response comprises calculating =Cq u, in which represents an estimated channel response, Cq represents a conversion matrix, and u represents a portion of the received handshake signal that is estimated to be the received training sequence; in which the conversion matrix Cq is determined by calculating Cq=(T′ T)−1 T′s in which T is a Toeplitz matrix generated based on sq, which represents an effective training sequence sent by the second device.