Wireless Communication System, Wireless Communication Apparatus, Amplification Factor Determination Method, and Storage Medium

• US 20090163153A1
• Filed: 08/29/2006
• Published: 06/25/2009
• Est. Priority Date: 08/29/2005
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Senda, Mitsuharu, Nishikido, Masamitsu
• Granted Patent: US 7,949,321 B2
• Time in Patent Office: Days
• US Class Current: 455/101
• CPC Class Codes: H03G 3/3052 in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver H03G3/32, H03G3/34 take precedence
• CPC Class Codes: H04L 27/3809 Amplitude regulation arrangements

Abstract

The back-off of an AGC diversion section can be appropriately controlled. A base station apparatus (10) includes an amplifying part (12) for receiving a first transmission signal, which is generated by being modulated using a first modulation scheme and transmitted, and a second transmission signal, which is generated by being modulated using a second modulation scheme in which the maximum value of the amplitude of the transmission signal that is generated differs from that of the first modulation scheme, and which is transmitted following the first transmission signal, and amplifying these signals at a given amplification factor; a basic value determining part (14a) for determining a basic value that is used to determine the given amplification factor on the basis of the received power of the first transmission signal; an amplification factor correcting part (15) for acquiring correction data for the basic value, which is correction data that is determined on the basis of the amount of difference between the maximum values of the amplitudes of the transmission signals that are respectively generated using the first modulation scheme and second modulation scheme; and an amplification factor determining part (14) for determining the given amplification factor for the second transmission signal on the basis of the basic value and the correction data.

Claims

1. A wireless communication system comprising a plurality of wireless communication apparatuses, wherein a first wireless communication apparatus comprises:

first transmission signal generating means for generating a first transmission signal modulated using a first modulation scheme;

second transmission signal generating means for generating a second transmission signal modulated using a second modulation scheme in which the maximum value of the amplitude of the transmission signal that is generated differs from that of the first modulation scheme; and

transmitting means for transmitting the generated first transmission signal, and then the generated second transmission signal, to a second wireless communication apparatus;

the second wireless communication apparatus comprises;

receiving means for receiving the first transmission signal and second transmission signal transmitted by the transmitting means, and amplifying these signals at a given amplification factor; and

the receiving means comprises;

basic value determining means for determining a basic value used to determine the given amplification factor on the basis of the received power of the first transmission signal;

correction data acquisition means for acquiring correction data for the basic value, which is correction data that is determined on the basis of the amount of difference between the maximum values of the amplitudes of the transmission signals respectively generated using the first modulation scheme and the second modulation scheme; and

amplification factor determining means for determining the given amplification factor for the second transmission signal on the basis of the determined basic value and the acquired correction data.

2. The wireless communication system according to claim 1, wherein

the wireless communication system performs multiplex communications by space division multiplexing and further comprises spatial multiplexing degree acquisition means for acquiring the degree of spatial multiplexing of the signals transmitted by the transmitting means;

and

the correction data acquisition means acquires the correction data determined also on the basis of the acquired degree of spatial multiplexing.

3. The wireless communication system according to claim 2, wherein:

the wireless communication system further comprises correction data storage means for storing the correction data in correspondence with difference amount information, which indicates the amount of difference between the maximum values of the amplitudes of the transmission signals generated using the respective modulation schemes and the maximum value of the amplitude of the transmission signal generated using the reference modulation scheme determined by the wireless communication system, and with spatial multiplexing degree information indicating the degree of spatial multiplexing; and

the correction data acquisition means acquires the correction data stored in correspondence with difference amount information, which indicates the amount of difference between the maximum value of the amplitude of the transmission signal generated using the second modulation scheme and the maximum value of the amplitude of the transmission signal generated using the first modulation scheme used as the reference modulation scheme, and with spatial multiplexing degree information indicating the acquired degree of spatial multiplexing.

4. A wireless communication apparatus comprising:

receiving means for receiving a first transmission signal, which is generated by being modulated using a first modulation scheme and transmitted, and a second transmission signal, which is generated by being modulated using a second modulation scheme in which the maximum value of the amplitude of the transmission signal generated differs from that of the first modulation scheme, and which is transmitted following the first transmission signal, and amplifying these signals at a given amplification factor;

wherein

the receiving means comprises;

basic value determining means for determining a basic value used to determine the given amplification factor on the basis of the received power of the first transmission signal;

correction data acquisition means for acquiring correction data for the basic value, which is correction data that is determined on the basis of the amount of difference between the maximum values of the amplitudes of the transmission signals respectively generated using the first modulation scheme and the second modulation scheme; and

amplification factor determining means for determining the given amplification factor for the second transmission signal on the basis of the determined basic value and the acquired correction data.

5. An amplification factor determination method comprising:

a receiving step of receiving a first transmission signal, which is generated by being modulated using a first modulation scheme and transmitted, and a second transmission signal, which is generated by being modulated using a second modulation scheme in which the maximum value of the amplitude of the transmission signal generated differs from that of the first modulation scheme, and which is transmitted following the first transmission signal, and amplifying these signals at a given amplification factor;

wherein

the receiving step further comprises;

a basic value determining step of determining a basic value used to determine the given amplification factor on the basis of the received power of the first transmission signal;

a correction data acquisition step of acquiring correction data for the basic value, which is correction data that is determined on the basis of the amount of difference between the maximum values of the amplitudes of the transmission signals respectively generated using the first modulation scheme and the second modulation scheme; and

an amplification factor determining step of determining the given amplification factor for the second transmission signal on the basis of the determined basic value and the acquired correction data.

6. A computer-readable storage medium storing a program for making a computer function as receiving means for receiving a first transmission signal, which is generated by being modulated using a first modulation scheme and transmitted, and a second transmission signal, which is generated by being modulated using a second modulation scheme in which the maximum value of the amplitude of the transmission signal generated differs from that of the first modulation scheme, and which is transmitted following the first transmission signal, and amplifying these signals at a given amplification factor;

wherein

the receiving means comprises;

basic value determining means for determining a basic value used to determine the given amplification factor on the basis of the received power of the first transmission signal;

correction data acquisition means for acquiring correction data for the basic value, which is correction data that is determined on the basis of the amount of difference between the maximum values of the amplitudes of the transmission signals respectively generated using the first modulation scheme and the second modulation scheme; and

amplification factor determining means for determining the given amplification factor for the second transmission signal on the basis of the determined basic value and the acquired correction data.