US 11,799,512 B2
Information processing apparatus, transmission-side apparatus and method
Kenichi Takizawa, Koganei (JP); and Masafumi Moriyama, Koganei (JP)
Assigned to Toyota Jidosha Kabushiki Kaisha, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Sep. 20, 2022, as Appl. No. 17/933,585.
Claims priority of application No. 2021-161154 (JP), filed on Sep. 30, 2021.
Prior Publication US 2023/0095942 A1, Mar. 30, 2023
Int. Cl. H04B 1/62 (2006.01); H04B 1/10 (2006.01)
CPC H04B 1/62 (2013.01) [H04B 1/1027 (2013.01); H04B 2001/1045 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An information processing apparatus comprising a controller configured to, when signals are simultaneously received from K transmission-side apparatuses (K: a positive integer) by a receiving antenna, and repetition of repeatedly and successively transmitting the same signal N times (N: a positive integer) is performed by the K transmission-side apparatuses:
divide the K transmission-side apparatuses into G groups (G: a positive integer; 1<G≤K);
in order to obtain a transmitted reference signal x(k,n) transmitted from a transmission-side apparatus k (k=1, . . . , K) included among the K transmission-side apparatuses by the n-th (n=1, . . . , N) reference signal transmission in the repetition, acquire a phase rotation amount φ(g,n) that is a phase rotation amount given to a transmitted reference signal x(k) and that is assigned to a group g (g=1, . . . , G) to which the transmission-side apparatus k belongs so that received reference signals from transmission-side apparatuses not belonging to the group g are cancelled when giving a phase rotation amount opposite to the phase rotation amount φ(g,n) to a received reference signal r(n) that is received by the receiving antenna by the n-th reference signal transmission in the repetition and that includes a transmitted reference signal from each of the K transmission-side apparatuses and adding the first to N-th received reference signals in the repetition, and
transmit a phase sequence Φg={φ(g,1), . . . , Φ(g,N)} that includes the phase rotation amount φ(g,n) for the group g for each of the first to N-th transmissions, to the transmission-side apparatus k.