Communication base station system for transmitting data to a movable body

Claim 2

A communication base station system for transmitting data to a movable body comprising: a plurality of transmission means, each of said plurality of transmission means for receiving a transmission data, modulating the received transmission data, and generating an output signal by converting a frequency of the modulated transmission data to a preset transmission frequency; a control means for controlling said plurality of transmission means, wherein if at least two of said plurality of transmission means are not in use, said control means outputs a respective specified signal instead of said transmission data to each of two of said plurality of transmission means among said at least two of said plurality transmission means; an amplification means for collectively amplifying the output signal from each of said plurality of transmission means; and a compensation means for compensating for intermodulation distortion components generated in said amplification means based on respective preset transmission frequencies of said two of said plurality of transmission means and on respective output signals of said two transmission means.

Claim 3

The communication base station system of claim 1, wherein said respective specified signal is a signal of a specified pattern for making an output signal from a corresponding transmission means be a signal of constant amplitude and constant frequency.

Claim 4

The communication base station system of claim 1, wherein each of said transmission means comprises: an orthogonal modulation means for receiving said transmission data, orthogonally modulating the received transmission data and outputting a modulated signal; and a frequency conversion means for receiving said modulated signal and converting a frequency of the modulated signal to a preset transmission frequency.

Claim 5

The communication base station system of claim 1, wherein said control means comprises an instruction means for calculating a frequency at which distortion is generated based on said respective preset transmission frequencies of said two transmission means and supplying the calculated frequency to said compensation means.

Claim 6

The communication base station system of claim 1, wherein said control means comprises a transmission frequency assigning means for assigning a preset transmission frequency to each of said plurality of transmission means.

Claim 7

The communication base station system of claim 1, wherein said control means comprises: a specified signal output means for generating a first and second specified signal and outputting said first specified signal to one of said two transmission means and outputting said second specified signal to the other of said two transmission means upon receipt of an instruction signal; and a monitoring means for monitoring a status of use of said plurality of transmission means and outputting said instruction signal.

Claim 8

The communication base station system of claim 6, wherein said specified signal output means comprises: a plurality of specified signal generation means corresponding to said plurality of transmission means, each of said specified signal generation means generating a specified signal; and a plurality of switching means corresponding to said plurality of specified signal generation means, each of said switching means receiving respective transmission data and a respective specified signal, said switching means selectively outputting one of said respective transmission data and said respective specified signal in accordance with said instruction signal.

Claim 9

The communication base station system of claim 6, wherein said specified signal output means comprises: a plurality of specified signal generation means corresponding to said plurality of transmission means, each of said specified signal generation means generating a specified signal; and a plurality of switching means corresponding to said plurality of specified signal generation means, each of said switching means receiving respective transmission data and a respective specified signal, said switching means selectively outputting one of said respective transmission data and said respective specified signal in accordance with said instruction signal; wherein said monitoring means is configured so as to monitor a status of use of said transmission means and to output said instruction signal.

Claim 10

The communication base station system of claim 1, wherein said transmission means and said control means maintain said preset transmission frequency as a channel.

Claim 11

A communication base station system transmitting data to a movable body comprising: a plurality of transmission means, each of said plurality of transmission means having an orthogonal modulation means for receiving a transmission data, orthogonally modulating the transmission data and outputting a modulated signal and a frequency conversion means for receiving said modulated signal and converting the frequency of the modulated signal to an assigned transmission frequency; a plurality of specified signal generation means corresponding to said plurality of transmission means, each of said plurality of specified signal generation means generating a specified signal; a plurality of switching means corresponding to said plurality of special signal generation means, each of said plurality of switching means for receiving respective transmission data and a respective specified signal, and selectively outputting one of said respective transmission data and said respective specified signal in accordance with an instruction signal; an amplification means for receiving output signals from said plurality of transmission means, collectively amplifying the received output signals and outputting the amplified signal; a distortion compensation means for compensating for intermodulation distortion components generated in said amplification means; a monitoring means for monitoring a status of use of said plurality of transmission means; a transmission control means for receiving information from said monitoring means, and if at least two of said plurality of transmission means are not in use, assigning a transmission frequency for distortion compensation to two of said plurality of transmission means among said at least two of said transmission means, and simultaneously outputting said instruction signal to respective switching means corresponding to said two of said plurality of transmission means; and a distortion compensation control means for calculating a frequency which generates intermodulation distortion based on the respective transmission frequencies assigned by said transmission control means to the two of said plurality of transmission means, and controlling said distortion compensation means.

Claim 12

A communication base station system transmitting data to a movable body comprising: a plurality of transmission means, each of said plurality of transmission means having an orthogonal modulation means for receiving a transmission data, orthogonally modulating the transmission data and outputting a modulated signal and a frequency conversion means for receiving said modulated signal and converting the frequency of the modulated signal to an assigned transmission frequency; a plurality of specified signal generation means corresponding to said plurality of transmission means, each of said plurality of specified signal generation means generating a specified signal; a plurality of switching means corresponding to said plurality of special signal generation means, each of said plurality of switching means for receiving respective transmission data and a respective specified signal, and selectively outputting one of said respective transmission data and said respective specified signal in accordance with an instruction signal; an amplification means for receiving output signals from said plurality of transmission means, collectively amplifying the received output signals and outputting the amplified signal; a distortion compensation means for compensating for intermodulation distortion components generated in said amplification means; a monitoring means for monitoring a status of use of said plurality of transmission means; a transmission control means for receiving information from said monitoring means, and if at least two of said plurality of transmission means are not in use, assigning a transmission frequency for distortion compensation to two of said plurality of transmission means among said at least two of said transmission means, and simultaneously outputting said instruction signal to respective switching means corresponding to said two of said plurality of transmission means; and a distortion compensation control means for calculating a frequency which generates intermodulation distortion based on the respective transmission frequencies assigned by said transmission control means to the two of said plurality of transmission means, and controlling said distortion compensation means.

Claim 13

The communication base station system of claim 10, wherein said specified signal is a signal of a specified pattern for making an output signal from a respective transmission means be a signal of constant amplitude and constant frequency.

Claim 14

The communication base station system of claim 10, wherein said assigned transmission frequency is maintained as a channel.

Claim 17

The method of compensating for intermodulation distortion components in a communication system of claim 13, wherein said respective specified signal is a signal of specified pattern for making an output signal from a corresponding transmission means be a signal of constant amplitude and constant frequency.

Claim 18

The method of compensating for intermodulation distortion components in a communication system of claim 13, wherein step 9 (1) comprises: receiving said transmission data, orthogonally modulating the received data transmissions and outputting a modulated signal; and receiving said modulated signal and converting a frequency of the modulated signal to a pre-determined transmission frequency.

Claim 19

The method of compensating for intermodulation distortion components in a communication system of claim 14, wherein step (2) further comprises calculating a frequency at which distortion is generated based on respective transmission frequencies of said two of said plurality of transmission means and supplying the calculated frequency to a compensation means.

Claim 20

The method of compensating for intermodulation distortion components in a communication system of claim 14, wherein step (2) comprises: monitoring a status of use of said transmission means, and if at least two of said plurality of transmission means are not in use, assigning two of said plurality of transmission means among the at least two of said plurality transmission means for distortion compensation and outputting an instruction signal instructing a switch means to supply respective specified signals to the two assigned transmission means; and generating said respective specified signals and outputting said respective specified signals to said two assigned transmission means upon receipt of said instruction signal.

Claim 21

The method of compensating for intermodulation distortion components in a communication system of claim 14, wherein step (2) further comprises calculating a frequency at which distortion is generated based on respective transmission frequencies of said two of said plurality of transmission means and outputting an instruction to a distortion compensation means.

Claim 22

The method of compensating for intermodulation distortion components in a communication system of claim 14, wherein step (1) and step (2) maintain a transmission frequency as a channel.

Claim 23

A communication base station system comprising: a plurality of transmission sections, each of said plurality of transmission sections receiving an input signal and generating an output signal by modulating said input signal and converting a frequency of the modulated input signal to a pre-determined transmission frequency; a control section coupled to each of said plurality of transmission sections, said control section operative to supply one of a respective transmission data and a respective specified signal as said input signal, wherein, if at least two of said plurality of transmission sections are not in use, said control section supplies respective specified signals to two of said plurality of transmission sections among the at least two of said plurality of transmission sections not in use; and an amplification section for collectively amplifying the output signal of each of said plurality of transmission sections, said amplification section including a compensation section, wherein said compensation section compensates for intermodulation distortion generated by said amplification section based on respective pre-determined transmission frequencies of said two of said plurality of transmission sections and on respective output signals thereof.

Claim 24

A communication base station system comprising: a plurality of transmission sections, each of said plurality of transmission sections receiving an input signal and generating an output signal by modulating said input signal and converting a frequency of the modulated input signal to a pre-determined transmission frequency; a control section coupled to each of said plurality of transmission sections, said control section operative to supply one of a respective transmission data and a respective specified signal as said input signal, wherein, if at least two of said plurality of transmission sections are not in use, said control section supplies respective specified signals to two of said plurality of transmission sections among the at least two of said plurality of transmission sections not in use; and an amplification section for collectively amplifying the output signal of each of said plurality of transmission sections, said amplification section including a compensation section, wherein said compensation section compensates for intermodulation distortion generated by said amplification section based on respective pre-determined transmission frequencies of said two of said plurality of transmission sections and on respective output signals thereof.

Claim 25

The communication base station system of claim 20, wherein said respective specified signals are of a specified pattern configured such that said two of said plurality of transmission sections generate respective output signals of respective constant amplitudes and respective constant frequencies.

Claim 26

The communication base station system of claim 20, wherein said control section comprises: a plurality of specified signal generation sections, each specified signal generation section generating a respective specified signal; and a plurality of switching sections, each respective one of said plurality of switching sections coupled between one of said plurality of specified signal generation sections and one of said plurality of transmission sections, wherein each respective one of said plurality of switching sections receives a respective transmission data and a respective specified signal, and wherein each respective one of said plurality of switching sections selectively outputs one of said respective transmission data and said respective specified signal in accordance with an instruction signal.

Claim 27

The communication base station system of claim 22, wherein said control section further comprises a monitor section which monitors said plurality of transmission sections and provides said instruction signal to each of a respective two of said plurality of switching sections coupled to said two of said plurality of transmission sections.