Wireless signal transmitting method and wireless apparatus

A wireless apparatus which transmits a wireless signal on which directivity control has been performed to stations in a wireless system including a plurality of wireless apparatuses each constituting a different communication cell, the wireless apparatus comprising:

• a preamble signal generator which outputs a preamble signal to be added to the wireless signal, the preamble signal being used to perform timing synchronization and frequency synchronization;
• a pilot subcarrier signal generator which outputs a pilot subcarrier signal that is used to correct a residual frequency error;
• a weighting processor programmed to perform weighting on a data signal to which the pilot subcarrier signal has been added and programmed to output a wireless signal;
• an extraction circuit which extracts a propagation channel corresponding to a subcarrier in which the preamble signal is transmitted from among propagation channels acquired from the stations;
• a preamble signal weighting processor programmed to calculate a weight based on the propagation channel extracted by the extraction circuit and programmed to perform the weighting on the preamble signal using the weight;
• and
• a wireless transmitter which transmits the wireless signal on which the weighting has been performed and the preamble signal on which the weighting has been performed which is added to the wireless signal on which the weighting has been performed.

A wireless signal transmitting method in which an access point transmits a wireless signal on which spatial division multiplexing has been performed to a first receiving station configured to apply a first set of rules defining transmissions and a second receiving station configured to apply a second set of rules defining transmissions that include transmissions not supported by the first set of rules, the wireless signal transmitting method comprising:

• generating L-STF as a known signal;
• performing weighting on all input signals starting from L-LTF;
• and
• transmitting a transmission signal in which the known signal has been added to the input signals on which the weighting has been performed.

A wireless signal transmitting method in which an access point transmits a wireless signal on which spatial division multiplexing has been performed to a first receiving station configured to apply a first set of rules defining transmissions and a second receiving station configured to apply a second set of rules defining transmissions that include transmissions not supported by the first set of rules, the wireless signal transmitting method comprising:

• generating, as a common signal, L-STF, L-LTF, L-SIG, HT-SIG, and a pilot subcarrier signal;
• performing weighting on all input signals starting from VH-SIG-A excluding the pilot subcarrier signal;
• and
• transmitting a transmission signal in which the common signal is added to the input signals on which the weighting has been performed.

A wireless signal transmitting method in which an access point transmits a wireless signal on which spatial division multiplexing has been performed to a first receiving station configured to apply a first set of rules defining transmissions and a second receiving station configured to apply a second set of rules defining transmissions that include transmissions not supported by the first set of rules, the wireless signal transmitting method comprising:

• generating, as a known signal, L-STF and a pilot subcarrier signal;
• performing weighting on all input signals starting from L-LTF excluding the pilot subcarrier signal;
• and
• transmitting a transmission signal in which the known signal has been added to the input signals on which the weighting has been performed.

A wireless apparatus which transmits a wireless signal on which spatial division multiplexing has been performed to a first receiving station configured to apply a first set of rules defining transmissions and a second receiving station configured to apply a second set of rules defining transmissions that include transmissions not supported by the first set of rules, the wireless apparatus comprising:

• a signal generator which outputs L-STF as a known signal;
• a weighting processor programmed to perform weighting on all input signals starting from L-LTF;
• and
• a wireless transmitter which transmits a transmission signal in which the known signal is added to the input signals on which the weighting has been performed by the weighting processor.

A wireless apparatus which transmits a wireless signal on which spatial division multiplexing has been performed to a first receiving station configured to apply a first set of rules defining transmissions and a second receiving station configured to apply a second set of rules defining transmissions that include transmissions not supported by the first set of rules in a wireless system including at least one wireless apparatus, the wireless apparatus comprising:

• a common signal generator which generates, as a common signal, L-STF, L-LTF, L-SIG, HT-SIG, and a pilot subcarrier signal;
• a weighting processor programmed to perform weighting on all input signals starting from VH-SIG-A excluding the pilot subcarrier signal;
• and
• a wireless transmitter which transmits a transmission signal in which the common signal is added to the input signals on which the weighting has been performed by the weighting processor.

A wireless apparatus which transmits a wireless signal on which spatial division multiplexing has been performed to a first receiving station configured to apply a first set of rules defining transmissions and a second receiving station configured to apply a second set of rules defining transmissions that include transmissions not supported by the first set of rules in a wireless system including at least one wireless apparatus, the wireless apparatus comprising:

• a signal generator which outputs, as a known signal, L-STF and a pilot subcarrier signal;
• a weighting processor programmed to perform weighting on all input signals starting from L-LTF excluding the pilot subcarrier signal;
• and
• a wireless transmitter which transmits a transmission signal in which the known signal is added to the input signals on which the weighting has been performed by the weighting processor.