Communication system and a communication apparatus
First Claim
1. A communication apparatus comprising:
- receiving and transmitting means having an antenna for receiving a first CDMA radio wave signal, detecting a desired wave component including a control signal from said first CDMA radio wave signal, and transmitting a second CDMA radio wave signal;
detection means for detecting an electric power of the detected desired wave component;
table means for storing a relation between said detected electric power and an electric power of said second CDMA radio wave signal to be transmitted, said control signal indicating compensation of said relation;
demodulating and detection means for demodulating the detected desired wave component and outputting demodulation data and for detecting said control signal from the detected desired wave component;
compensation means for compensating said relation in accordance with said detected control signal;
determining means for determined an actual electric power of said second CDMA radio wave signal to be transmitted in accordance with the compensated said relation; and
transmission power control means for controlling a transmission power of said second CDMA radio wave signal in accordance with said actual electric power.
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Accused Products
Abstract
A COMM system is disclosed which comprises mobile stations and a base station. The mobile station comprises; a 1st receiving and transmitting portion; a detection portion for detecting an electric power of a 1st desired wave component of the received 1st CDMA SIG; a table for storing a relation between reception power and transmission power of a 2nd CDMA SIG to be transmitted; a demodulation portion for demodulating the received 1st CDMA SIG and for detecting a CONT SIG in the desired wave; a compensation portion for compensating the relation according to the detected CONT SIG; and a transmission power CONT portion for controlling a transmission power determined according to the electric power obtained through the compensated table and the reception power. The base station comprises; a 2nd receiving and transmitting portion; an power detection portion for repeatedly detecting an electric power of a 2nd desired wave component of the received 2nd CDMA SIG; an averaging portion for averaging the repeatedly detected electric powers to obtain an average; and a CONT SIG generation portion for generating the CONT SIG according to an error between the average and a given value. The relation is corrected within a portion of range of the reception power or within a range of transmission power.
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Citations
7 Claims
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1. A communication apparatus comprising:
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receiving and transmitting means having an antenna for receiving a first CDMA radio wave signal, detecting a desired wave component including a control signal from said first CDMA radio wave signal, and transmitting a second CDMA radio wave signal; detection means for detecting an electric power of the detected desired wave component; table means for storing a relation between said detected electric power and an electric power of said second CDMA radio wave signal to be transmitted, said control signal indicating compensation of said relation; demodulating and detection means for demodulating the detected desired wave component and outputting demodulation data and for detecting said control signal from the detected desired wave component; compensation means for compensating said relation in accordance with said detected control signal; determining means for determined an actual electric power of said second CDMA radio wave signal to be transmitted in accordance with the compensated said relation; and transmission power control means for controlling a transmission power of said second CDMA radio wave signal in accordance with said actual electric power. - View Dependent Claims (2, 3)
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4. A communication apparatus comprising:
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transmitting and receiving means having an antenna for transmitting a first CDMA radio wave signal including a control signal, receiving a second CDMA radio wave signal, and detecting a desired wave component and interference wave components from said second CDMA radio wave signal; first electric power calculation means for calculating a first electric power from said detected desired wave component at a first cycle; second electric power calculation means for calculating a second electric power from the detected interference wave components at a second cycle which is different from said first cycle; operation means for operating a signal to interference power ratio from the detected first and second electric powers; comparing means for obtaining an error between said signal to interference power ratio and a target value and comparing said error with a predetermined value; and control signal generation means for generating said control signal when said error exceeds said predetermined value.
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5. A communication system comprising a plurality of mobile stations and a base station,
each of said mobile stations comprising: -
receiving and transmitting means having a first antenna for receiving a first CDMA radio wave signal, detecting a first desired wave component including a control signal, and transmitting a second CDMA radio wave signal; detection means for detecting an electric power of a first desired wave component of the received first CDMA radio wave signal; table means for storing a relation between said detected electric power and an electric power of said second CDMA radio wave signal to be transmitted, said control signal indicating compensation of said relation; demodulation and detection means for demodulating said received first desired wave component and outputting demodulation data and for detecting said control signal from said received first desired wave component; compensation means for compensating said relation in accordance with said detected control signal; determining means for determined an actual electric power of said second CDMA radio wave signal to be transmitted in accordance with the compensated said relation; and transmission power control means for controlling a transmission power of said second CDMA radio wave signal in accordance with said actual electric power, said base station comprising; transmitting and receiving means having a second antenna for transmitting said first CDMA radio wave signal including said control signal, receiving said second CDMA radio wave signal, and detecting a second desired wave component from said second CDMA radio wave signal; electric power detection means for repeatedly detecting an electric power of a second desired wave component of the received second CDMA radio wave signal; averaging means for averaging the repeatedly detected electric powers to obtain an average; comparing means for obtaining an error between said average and a target value and comparing said error with a predetermined value; and control signal generation means for generating said control signal when said error exceeds said predetermined value. - View Dependent Claims (6, 7)
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Specification