Patent ID: 9276654
Filing Date: 2016-03-01
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A transmitter comprising: a Multiple Input Multiple Output (MIMO) precoder configured to, in response to a first input signal and a second input signal, generate a first transmission signal and a second transmission signal, by performing MIMO precoding by pre-phase shifting or pre-phase shifting/hopping the second input signal, and superposition encoding the first input signal and the pre-phase shifted or pre-phase shifted/hopped second input signal; and an OFDM modulator configured to OFDM modulate the first transmission signal and the second transmission signal, wherein the MIMO precoder performs the MIMO precoding by using one of following four equations: where c is a pre-phase shift matrix, is a superposition encoding matrix, θ is a pre-phase shift parameter, and w is a superposition encoding parameter; where c is a pre-phase shift/hopping matrix, is a superposition encoding matrix, θ(k) is a pre-phase shift/hopping parameter for a k th symbol, and ψ is a superposition encoding parameter; where c is a pre-phase shift matrix, is a superposition encoding matrix, θ is a pre-phase shift parameter, and ψ(k) is a superposition encoding parameter for a k th symbol; and where c is a pre-phase shift/hopping matrix, is a superposition encoding matrix, θ(k) is a pre-phase shift/hopping parameter for a k th symbol, and ψ(k) is a superposition encoding parameter for a k th symbol.