Patent ID: 9313020
Filing Date: 2016-04-12
CPC Classification: H04L,H04W

Claim Text:
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 in which the conversion matrix Cq is determined by calculating Cq=(T′ T)