Communication apparatus
First Claim
1. A communication apparatus which communicates a signal, comprising:
- a transmission object signal level changing unit which changes a level of a signal which becomes, as to each of plural channels, a transmission object of each channel;
a transmission filter unit which carries out filtering for a signal of each channel, of which a level was changed by the transmission object signal level changing unit, by a filtering characteristic for allowing passage of a frequency component of each channel, as to each of the plural channels;
a transmission signal coupling unit which couples signals of the plural channels, for which filtering was carried out by the transmission filter unit;
an antenna which transmits a signal which was coupled by the transmission signal coupling unit, by wireless;
a coupled signal dividing unit which divides a part of the coupled signal which is outputted from the transmission signal coupling unit to the antenna, into a plurality of signals;
a level detection filter unit which carries out filtering each divided signal which was divided up by the coupled signal dividing unit, by a filtering characteristic which is tuned to an identical frequency to that of the filtering characteristic of the transmission filter unit, as to each of the plural channels;
a signal level detecting unit which detects a level of a signal of each channel, which was obtained by filtering due to the level detection filter unit; and
a transmission object signal level change mode controlling unit which controls a mode of changing a level of a signal which becomes a transmission object of each channel, by the transmission object signal level changing unit, on the basis of a level of a signal of each channel, which was detected by the signal level detecting unit.
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Accused Products
Abstract
In a communication apparatus, effective automatic power control (APC) is realized. Transmission object signal level changing units change a level of a transmission object signal of each channel, and transmission filter units carry out filtering for a signal of each channel after its level was changed with a characteristic for allowing a passage of a frequency component of each channel, and a transmission signal coupling unit couples signals of plural channels after the filtering was carried out, and an antenna transmits a coupled signal by wireless, and coupled signal dividing units divide a part of the coupled signal into a plurality of signals, and level detection filter units carry out filtering for each divided signal with an identical characteristic to the above-described characteristic, and signal level detecting units detect a level of a signal of each channel after the filtering was carried out, and a transmission object signal level change mode controlling unit controls a level change mode of a transmission object signal of each channel on the basis of the detection result.
49 Citations
20 Claims
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1. A communication apparatus which communicates a signal, comprising:
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a transmission object signal level changing unit which changes a level of a signal which becomes, as to each of plural channels, a transmission object of each channel;
a transmission filter unit which carries out filtering for a signal of each channel, of which a level was changed by the transmission object signal level changing unit, by a filtering characteristic for allowing passage of a frequency component of each channel, as to each of the plural channels;
a transmission signal coupling unit which couples signals of the plural channels, for which filtering was carried out by the transmission filter unit;
an antenna which transmits a signal which was coupled by the transmission signal coupling unit, by wireless;
a coupled signal dividing unit which divides a part of the coupled signal which is outputted from the transmission signal coupling unit to the antenna, into a plurality of signals;
a level detection filter unit which carries out filtering each divided signal which was divided up by the coupled signal dividing unit, by a filtering characteristic which is tuned to an identical frequency to that of the filtering characteristic of the transmission filter unit, as to each of the plural channels;
a signal level detecting unit which detects a level of a signal of each channel, which was obtained by filtering due to the level detection filter unit; and
a transmission object signal level change mode controlling unit which controls a mode of changing a level of a signal which becomes a transmission object of each channel, by the transmission object signal level changing unit, on the basis of a level of a signal of each channel, which was detected by the signal level detecting unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A communication apparatus which communicates a signal, comprising:
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a modulating signal level changing unit which changes a level of a modulating signal which becomes a transmission object;
a pre-level change modulating signal level detecting unit which detects a level of a modulating signal before its level is changed by the modulating signal level changing unit;
a detection level predetermined value synthesizing unit which synthesizes a level which was detected by the pre-level change modulating signal level detecting unit, and a predetermined value based on a transmission level which becomes a target and is independent of a modulation system;
a post-level change modulating signal level detecting unit which detects a level of a modulating signal after its level was changed by the modulating signal level changing unit, by an identical detection characteristic to that of the pre-level change modulating signal level detecting unit; and
a modulating signal level change mode controlling unit which controls a mode of changing a level of a modulating signal which becomes a transmission object, by the modulating signal level changing unit, on the basis of a difference of a synthesis result by the detection level predetermined value synthesizing unit, and a level which was detected by the post-level change modulating signal level detecting unit. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A communication apparatus which communicates a signal, comprising:
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a transmission object signal level changing unit which changes a level of a signal which becomes, as to each of plural channels, a transmission object of each channel;
a transmission filter unit which carries out filtering for a signal of each channel, of which a level was changed by the transmission object signal level changing unit, by a filtering characteristic for allowing passage of a frequency component of each channel, as to each of the plural channels;
a transmission signal coupling unit which couples signals of the plural channels, for which filtering was carried out by the transmission filter unit;
an antenna which transmits a signal which was coupled by the transmission signal coupling unit, by wireless;
a pre-level change signal level detecting unit which detects a level of a signal before its level is changed by the transmission object signal level changing unit, as to each of the plural channels;
a detection level predetermined value synthesizing unit which synthesizes a level which was detected by the pre-level change signal level detecting unit, as to each of the plural channels, and a predetermined value based on a transmission level which becomes a target and is independent of a modulation system;
a coupled signal dividing unit which divides a part of the coupled signal which is outputted from the transmission signal coupling unit to the antenna, into a plurality of signals;
a level detection filter unit which carries out filtering each divided signal which was divided up by the coupled signal dividing unit, by a filtering characteristic which is tuned to an identical frequency to that of the filtering characteristic of the transmission filter unit, as to each of the plural channels;
a signal level detecting unit which detects a level of a signal of each channel, which was obtained by filtering due to the level detection filter unit by a detection characteristic identical to that of the pre-level change signal level detecting unit; and
a transmission object signal level change mode controlling unit which controls a mode of changing a level of a signal which becomes a transmission object, by the transmission object signal level changing unit, on the basis of a difference of a synthesis result by the detection level predetermined value synthesizing unit and a level which was detected by the signal level detecting unit as to each of the plural channels.
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Specification