Data transmitting method and data transmitting apparatus accompanied with a plurality of transmitting of receiving antennas

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• supplying a transmission signal to one of a plurality of transmitting antennas and transmitting said transmission signal;
• selecting an appropriate one of said plurality of transmitting antennas in accordance with a state change of said transmission path during the transmission of said transmission signal;
• and
• soft-switching the transmitting antennas from said one transmitting antenna to said selected antenna so as to continuously shift a level of said transmission signal from said one transmitting antenna to said selected transmitting antenna over a predetermined time,
• wherein said information data is modulated by a quadrature amplitude modulation system.

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• receiving a transmission signal by one of a plurality of receiving antennas;
• selecting an appropriate one of said plurality of receiving antennas in accordance with a state change of said transmission path during the reception of said transmission signal;
• and
• soft-switching said receiving antennas from said one receiving antenna to said selected receiving antenna in a manner such that when said transmission signal is supplied from said receiving antenna to a reception demodulating unit, a signal level of said transmission signal is continuously shifted from said one receiving antenna to said selected receiving antenna over a predetermined time,
• wherein said reception demodulating unit has an automatic receiving-frequency-characteristics equalizing function, and said predetermined time is longer than the time that is necessary for processing said automatic equalizing function.

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• receiving a transmission signal by one of a plurality of receiving antennas;
• selecting an appropriate one of said plurality of receiving antennas in accordance with a state change of said transmission path during the reception of said transmission signal;
• and
• soft-switching said receiving antennas from said one receiving antenna to said selected receiving antenna in a manner such that when said transmission signal is supplied from said receiving antenna to a reception demodulating unit, a signal level of said transmission signal is continuously shifted from said one receiving antenna to said selected receiving antenna over a predetermined time,
• wherein said information data is modulated by a quadrature amplitude modulation system.

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• supplying a transmission signal to one of a plurality of transmitting antennas and transmitting said transmission signal;
• selecting an appropriate one of said plurality of transmitting antennas in accordance with a state change of said transmission path during the transmission of said transmission signal;
• soft-switching the transmitting antennas from said one transmitting antenna to said selected antenna so as to continuously shift a level of said transmission signal from said one transmitting antenna to said selected transmitting antenna over a predetermined time;
• receiving said transmission signal by one of a plurality of receiving antennas;
• selecting an appropriate one of said plurality of receiving antennas in accordance with a state change of said transmission path during the reception of said transmission signal;
• and
• soft-switching said receiving antennas from said one receiving antenna to said selected receiving antenna in a manner such that when said transmission signal is supplied from said receiving antenna to a reception demodulating unit, a signal level of said transmission signal is continuously shifted from said one receiving antenna to said selected receiving antenna over a predetermined time.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus including a transmission modulating unit, a switching unit for switching an output of said transmission modulating unit to an appropriate one of a plurality of transmission paths in accordance with a state change of said transmission path, a switching control unit for controlling said switching unit, and a plurality of transmitting antennas which receive outputs from said switching unit and are connected to said plurality of transmission paths, respectively;
• and
• a receiving apparatus having a receiving antenna and a reception demodulating unit with an automatic receiving-frequency equalizing function which receives an output of said receiving antenna,
• wherein said switching unit includes a path soft switching unit for switching said transmission paths from the path before switching to the path after switching in a manner such that a transmitting level of a transmission signal is continuously shifted from the path before switching to the path after switching over a predetermined time and a soft control unit for generating a control signal to said soft switching unit, and
• wherein said predetermined time is longer than the time that is necessary for processing said automatic receiving frequency-characteristics equalizing function.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus including a transmission modulating unit, a switching unit for switching an output of said transmission modulating unit to an appropriate one of a plurality of transmission paths in accordance with a state change of said transmission path, a switching control unit for controlling said switching unit, and a plurality of transmitting antennas which receive outputs from said switching unit and are connected to said plurality of transmission paths, respectively;
• and
• a receiving apparatus having a receiving antenna and a reception demodulating unit with an automatic receiving-frequency equalizing function which receives an output of said living antenna,
• wherein said switching unit includes a path soft switching unit for switching said transmission paths from the path before switching to the path after switching in a manner such that a transmitting level of a transmission signal is continuously shifted from the path before switching to the path after switching over a predetermined time and a soft control unit for generating a control signal to said soft switching unit, and
• wherein said information data is modulated by a quadrature amplitude modulation system.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• transmitting apparatus;
• and
• a receiving apparatus including a plurality of receiving antennas, a selecting unit for selecting one of output paths from said plurality of receiving antennas in accordance with a state change of said transmission path, a selection control unit for controlling said selecting unit, and a reception demodulating unit with an automatic receiving-frequency-characteristics equalizing function which receives an output from said selecting unit,
• wherein said selecting unit includes a path soft selecting unit for selecting a receiving antenna output path in a manner such that when a received reception on signal is supplied to said reception demodulating unit, a level of said reception signal is continuously shifted from the receiving antenna output path before selection to the receiving antenna path after selection over a predetermined time, and a soft control unit for getting a control signal for said soft selecting unit in response to said selection control unit, and
• wherein said predetermined time is longer than the time that is necessary for processing said automatic receiving frequency-characteristics equalizing function.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus;
• and
• a receiving apparatus including a plurality of receiving antennas, a selecting unit for selecting one of output paths from said plurality of receiving antennas in accordance with a state change of said transmission path, a selection control unit for controlling said selecting unit, and a reception demodulating unit with an automatic receiving-frequency-characteristics equalizing function which receives an output from said selecting unit,
• wherein said selecting unit includes a path soft selecting unit for selecting a receiving antenna output path in a manner such that when a received reception signal is supplied to said reception demodulating unit, a level of said reception signal is continuously shifted from the receiving antenna output path before selection to the receiving antenna path after selection over a predetermined time, and a soft control unit for generating a control signal for said soft selecting unit in response to said selection control unit, and
• wherein said information data is modulated by a quadrature amplitude modulation system.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus;
• and
• a receiving apparatus including a plurality of receiving antennas, a selecting unit for selecting one of output paths from said plurality of receiving antennas in accordance with a state change of said transmission path, a selection control unit for controlling said selecting unit, and a reception demodulating unit with an automatic receiving-frequency-characteristics equalizing function which receives an output from said selecting unit,
• wherein said selecting unit includes a path soft selecting unit for selecting a receiving antenna output path in a manner such that when a received reception signal is supplied to said reception demodulating unit, a level of said reception signal is continuously shifted from the receiving antenna output path before selection to the receiving antenna path after selection over a predetermined time, and a soft control unit for generating a control signal for said soft selecting unit in response to said selection control unit,
• wherein said transmitting apparatus includes a transmission modulating unit, a switching unit for switching an output of said transmission modulating unit to an appropriate one of a plurality of transmission paths in accordance with a state change of said transmission path, a switching control unit for controlling said switching unit, and a plurality of transmitting antennas which receive outputs from said switching unit and are connected to said plurality of transmission paths, respectively, and
• wherein said switching unit includes a path soft switching unit for switching said transmission paths from the path before switching to the path after switching in a manner such that a transmitting level of a transmission signal is continuously shifted from the path before switching to the path after switching over a predetermined time and a soft control unit for generating a control signal to said soft switching unit.

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• supplying a transmission signal to one of a plurality of transmitting antennas and transmitting said transmission signal;
• selecting an appropriate one of said plurality of transmitting antennas in accordance with a state change of said transmission path during the transmission of said transmission signal;
• and
• soft-switching the transmitting antennas from said one transmitting antenna to said selected antenna so as to continuously shift a level of said transmission signal from said one transmitting antenna to said selected transmitting antenna over a predetermined time,
• wherein said information data is modulated by an 8-VSB system.

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• supplying a transmission signal to one of a plurality of transmitting antennas and transmitting said transmission signal;
• selecting an appropriate one of said plurality of transmitting antennas in accordance with a state change of said transmission path during the transmission of said transmission signal;
• and
• soft-switching the transmitting antennas from said one transmitting antenna to said selected antenna so as to continuously shift a level of said transmission signal from said one transmitting antenna to said selected transmitting antenna over a predetermined time,
• wherein said information data is modulated by a multiple level-FM.

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• receiving a transmission signal by one of a plurality of receiving antennas;
• selecting an appropriate one of said plurality of receiving antennas in accordance with a state change of said transmission path during the reception of said transmission signal;
• soft-switching said receiving antennas from said one receiving antenna to said selected receiving antenna in a manner such that when said transmission signal is supplied from said receiving antenna to a reception demodulating unit, a signal level of said transmission signal is continuously shifted from said one receiving antenna to said selected receiving antenna over a predetermined time,
• wherein said information data is modulated by an 8-VSB system.

A control method of a data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising the steps of:

• receiving a transmission signal by one of a plurality of receiving antennas;
• selecting an appropriate one of said plurality of receiving antennas in accordance with a state change of said transmission path during the reception of said transmission signal;
• soft-switching said receiving antennas from said one receiving antenna to said selected receiving antenna in a manner such that when said transmission signal is supplied from said receiving antenna to a reception demodulating unit, a signal level of said transmission signal is continuously shifted from said one receiving antenna to said selected receiving antenna over a predetermined time,
• wherein said information data is modulated by a multiple level-FM.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus including a transmission modulating unit, a switching unit for switching an output of said transmission modulating unit to an appropriate one of a plurality of transmission paths in accordance with a state change of said transmission path, a switching control unit for controlling said switching unit, and a plurality of transmitting antennas which receive outputs from said switching unit and are connected to said plurality of transmission paths, respectively;
• and
• a receiving apparatus having a receiving antenna and a reception demodulating unit with an automatic receiving-frequency equalizing function which receives an output of said receiving antenna,
• wherein said switching unit includes a path soft switching unit for switching said transmission paths from the path before switching to the path after switching in a manner such that a transmitting level of a transmission signal is continuously shifted from the path before switching to the path after switching over a predetermined time and a soft control unit for generating a control signal to said soft switching unit, and
• wherein said information data is modulated by an 8-VSB system.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus including a transmission modulating unit, a switching unit for switching an output of said transmission modulating unit to an appropriate one of a plurality of transmission paths in accordance with a state change of said transmission path, a switching control unit for controlling said switching unit, and a plurality of transmitting antennas which receive outputs from said switching unit and are connected to said plurality of transmission paths, respectively;
• and
• a receiving apparatus having a receiving antenna and a reception demodulating unit with an automatic receiving-frequency equalizing function which receives an output of said receiving antenna,
• wherein said switching unit includes a path soft switching unit for switching said transmission paths from the path before switching to the path after switching in a manner such that a transmitting level of a transmission signal is continuously shifted from the path before switching to the path after switching over a predetermined time and a soft control unit for generating a control signal to said soft switching unit, and
• wherein said information data is modulated by a multiple level-FM.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus;
• and
• a receiving apparatus including a plurality of receiving antennas, a selecting unit for selecting one of output paths from said plurality of receiving antennas in accordance with a state change of said transmission path, a selection control unit for controlling said selecting unit, and a reception demodulating unit with an automatic receiving-frequency-characteristics equalizing function which receives an output from said selecting unit,
• wherein said selecting unit includes a path soft selecting unit for selecting a receiving antenna output path in a manner such that when a received reception signal is supplied to said reception demodulating unit, a level of said reception signal is continuously shifted from the receiving antenna output path before selection to the receiving antenna path after selection over a predetermined time, and a soft control unit for generating a control signal for said soft selecting unit in response to said selection control unit, and
• wherein said information data is modulated by an 8-VSB system.

A data transmitting apparatus for transmitting and receiving digitally modulated information data through a transmission path, comprising:

• a transmitting apparatus;
• and
• a receiving apparatus including a plurality of receiving antennas, a selecting unit for selecting one of output paths from said plurality of receiving antennas in accordance with a state change of said transmission path, a selection control unit for controlling said selecting unit, and a reception demodulating unit with an automatic receiving-frequency-characteristics equalizing function which receives an output from said selecting unit,
• wherein said selecting unit includes a path soft selecting unit for selecting a receiving antenna output path in a manner such that when a received reception signal is supplied to said reception demodulating unit, a level of said reception signal is continuously shifted from the receiving antenna output path before selection to the receiving antenna path after selection over a predetermined time, and a soft control unit for generating a control signal for said soft selecting unit in response to said selection control unit, and
• wherein said information data is modulated by a multiple level-FM.