Receiving method and apparatus, and communication system using the same
View Patent ↗A radio unit receives burst signals in a target system or those in a MIMO system. A judgment unit determines if a MIMO signal having a form of channel corresponding to the target system is assigned posterior to a target LTS and a target signal. If a constellation of signal points in a position posterior to the target LTS and target signal corresponds to a constellation of signal points in a MIMO signal, the judgment unit judges that the MIMO signal is assigned in the received burst signal. If it is judged by the judgment unit that the MIMO signal was assigned, an instruction unit stops the operation of a baseband processing unit for MIMO-STS and the like assigned posterior to the MIMO signal.
1. A transmitting apparatus for transmitting an OFDM signal, comprising:
a generator operative to generate a burst signal having a first burst format where a first Non-MIMO training signal, a first Non-MIMO signal, a MIMO signal, a MIMO training signal, and first data are arranged in the stated order; and
a transmitter operative to transmit the burst signal generated by the generator, wherein
a subcarrier carrying a first pilot signal included by frequency-division multiplexing in the first data in the first burst format of the burst signal generated by the generator is the same as a subcarrier carrying a second pilot signal included by frequency-division multiplexing in second data in a second format where a second Non-MIMO training signal, a second Non-MIMO signal, and the second data are arranged in the stated order,
a modulation scheme of the first pilot signal is the same as a modulation scheme of the second pilot signal,
a pattern of the first pilot signal is different from a pattern of the second pilot signal, and
the transmitter transmits the burst signal from a plurality of antennas such that the signal transmitted from a given one antenna is shifted in timing with respect to the signal transmitted from another antenna in a cyclical manner.
2. A transmitting method for transmitting an OFDM signal, comprising:
generating a burst signal having a first burst format where a first Non-MIMO training signal, a first Non-MIMO signal, a MIMO signal, a MIMO training signal, and first data are arranged in the stated order; and
transmitting the burst signal, wherein
a subcarrier carrying a first pilot signal included by frequency-division multiplexing in the first data in the first burst format is the same as a subcarrier carrying a second pilot signal included by frequency-division multiplexing in second data in a second format where a second Non-MIMO training signal, a second Non-MIMO signal, and the second data are arranged in the stated order,
a modulation scheme of the first pilot signal is the same as a modulation scheme of the second pilot signal,
a pattern of the first pilot signal is different from a pattern of the second pilot signal, and
the transmitting transmits the burst signal from a plurality of antennas such that the signal transmitted from a given one antenna is shifted in timing with respect to the signal transmitted from another antenna in a cyclical manner.