Transmission device and gain control method
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus that can lower the possibility of failing reception modulation in communication where data is transmitted with and without directivity and prevent deterioration of transmission efficiency caused by retransmission. With this apparatus, a gain control signal multiplex section (203) time division multiplexes a directional transmission signal and a gain control signal. A transmission level control section (204) controls the transmission power level of a gain control signal so that the transmission power level of the gain control signal is smaller than the transmission power level of a directional transmission signal and the received power level of the gain control signal is larger than a received power level of a nondirectional transmission signal at the receiving side, and controls the transmission power level of a directional transmission signal so that the received power level of the directional transmission signal is larger than the received power level of a nondirectional transmission signal and the received power level of a gain control signal at the receiving side.
15 Citations
26 Claims
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1-17. -17. (canceled)
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18. A transmission apparatus comprising:
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a gain control signal generating section that generates a gain control signal comprising a signal for adjusting a gain for a received signal of a communicating party;
a gain control signal multiplex section that time division multiplexes a directional transmission signal and the gain control signal so that the gain control signal is transmitted a predetermined time before a frame in which the directional transmission signal is transmitted in bursts;
a transmission level control section that sets a transmission power level of the gain control signal so that a transmission power level of the gain control signal is smaller than a transmission power level of the directional transmission signal and a received power level of the gain control signal is larger than a received power level at a communicating party of a nondirectional transmission signal; and
a transmission section that transmits the directional transmission signal and the gain control signal at the transmission power level set at said transmission level control section with directivity, and transmits the nondirectional transmission signal without directivity. - View Dependent Claims (19, 20)
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21. A transmission apparatus comprising:
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a control signal multiplex section that time division multiplexes a directional transmission signal and power level information so that the power level information comprising information of a received power level at the communicating party of the directional transmission signal is transmitted to the communicating party before the directional transmission signal is transmitted; and
a transmission section that transmits the power level information and the directional transmission signal multiplexed at said control signal multiplex section with directivity. - View Dependent Claims (22)
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23. A reception apparatus comprising:
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a received level detecting section that obtains a received power level of a gain control signal comprising a signal for adjusting a gain for a received signal included in the received signal and a received power level of the received signal other than the gain control signal;
a gain setting section that sets a gain based on a received power level of the gain control signal measured at said received level detecting section and the received power level of the received signal other than the gain control signal; and
a gain adjusting section that amplifies a gain for the received signal at the gain set at said gain setting section. - View Dependent Claims (24)
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25. A reception apparatus comprising:
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a gain setting section that sets a gain corresponding to power level information comprising information indicating a received power level after a predetermined time included in a received signal; and
a gain adjusting section that amplifies the received signal at the gain set at said gain setting section.
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26. A gain control method comprising steps of:
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generating a gain control signal comprising a signal for adjusting a gain for a received signal of a communicating party;
time division multiplexing a directional signal and the gain control signal so that the gain control signal is transmitted a predetermined time before a frame in which the directional signal is transmitted in bursts;
setting a transmission power level of the gain control signal so that a transmission power level of the gain control signal is smaller than the transmission power level of the directional signal and a received power level of the gain control signal is larger than a received power level of a nondirectional signal at a communicating party;
transmitting the directional signal and the gain control signal at the set transmission power level with directivity and transmits the nondirectional signal without directivity; and
controlling a gain at a dynamic range including the received power level of the received nondirectional signal, the gain control signal and the directional signal.
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Specification