CPC H04B 1/62 (2013.01) [H04B 1/1027 (2013.01); H04B 2001/1045 (2013.01)] | 20 Claims |
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.
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