Transmission method, transmitter apparatus, reception method and receiver apparatus

摘要

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

主权项

1. A transmission method comprising:
generating a first modulation signal s1 by using a first modulation scheme; generating a second modulation signal s2 by using a second modulation scheme; regularly switching between a plurality of precoding matrices for generating a first precoded signal z1 and a second precoded signal z2; generating the first precoded signal z1 and the second precoded signal z2 by applying one of the plurality of precoding matrices to the first modulation signal s1 and the second modulation signal s2; transmitting the first precoded signal z1 from one or more first antennas; and transmitting the second precoded signal z2 from one or more second antennas, the second antennas being different from the first antennas, wherein the first precoded signal z1 includes a first symbol and a second symbol that is adjacent to the first symbol in a frequency domain, the second precoded signal z2 includes a third symbol and a fourth symbol that is adjacent to the third symbol in the frequency domain, the first symbol and the third symbol are transmitted at a first frequency, the second symbol and the fourth symbol are transmitted at a second frequency, and a first precoding matrix for the first symbol and the third symbol and a second precoding matrix for the second symbol and the fourth symbol are different from each other.