US 11,916,719 B2
Wireless transmission device, wireless reception device, remote communication monitoring system and wireless communication method
Akinori Nakajima, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed by MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed on May 26, 2021, as Appl. No. 17/330,880.
Application 17/330,880 is a continuation of application No. PCT/JP2018/048567, filed on Dec. 28, 2018.
Prior Publication US 2021/0281459 A1, Sep. 9, 2021
Int. Cl. H04L 27/00 (2006.01); H04B 17/345 (2015.01); H04L 1/08 (2006.01); H04L 7/00 (2006.01); H04L 27/26 (2006.01)
CPC H04L 27/2627 (2013.01) [H04B 17/345 (2015.01); H04L 1/08 (2013.01); H04L 7/0033 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A wireless transmission device comprising
a repetition coding circuitry to prepare a basic waveform of a data frame having a length less than a frequency conversion length of a wireless reception device, generate a repetition waveform having a length greater than or equal to the frequency conversion length by repeating the basic waveform a plurality of times, and generate the data frame including the repetition waveform and a known signal, wherein the repetition coding circuitry performs differential coding,
wherein the repetition coding circuitry adjusts a symbol at a predetermined position of each basic waveform included in the repetition waveform such that a differentially coded sequence maintains the repetition waveform.