Wireless telecommunication equipment

• US 6,011,980 A
• Filed: 07/25/1997
• Issued: 01/04/2000
• Est. Priority Date: 08/21/1996
• Status: Expired due to Fees

• Current Assignee: OKI Electric Industry Company Limited
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Nagano, Tomonori, O, Waho, Katsuyama, Tsutomu
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): Tran, Pablo N.
• Application Number:
  US08/900,703
• Time in Patent Office: 893 Days
• Field of Search: 455/69, 455/234.1, 455/234.2, 455/239.1, 455/240.1, 455/245.1, 455/245.2, 455/522
• US Class Current: 455/572
• CPC Class Codes: H03G 3/3042 in modulators, frequency-changers, transmitters or power amplifiers transmission power control in bidirectional transmission systems H04W52/04
• CPC Class Codes: H03G 3/3078 Circuits generating control signals for digitally modulated signals
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/52 using AGC [Automatic Gain Control] circuits or amplifiers

Abstract

A wireless telecommunication equipment having a receiver portion and a transmitter portion. An automatic gain control amplifier having a gain varied in accordance with an automatic gain control signal input thereto is located in the receiver portion of the equipment, and a transmission power control amplifier having a gain varied in accordance with an open loop control signal input thereto is located in the transmitter portion of said equipment. The automatic gain control and the transmission power control amplifiers have the same operating characteristics.

Claims

1. A wireless telecommunication equipment having a receiver portion and a transmitter portion, comprising:

an automatic gain control amplifier located in the receiver portion of said equipment, said automatic gain control amplifier having a first gain varied in accordance with an automatic gain control signal input thereto; and

a transmission power control amplifier located in the transmitter portion of said equipment, said transmission power control amplifier having a second gain varied in accordance with an open loop control signal input thereto,

wherein said automatic gain control amplifier and said transmission power control amplifier have the same operating characteristic and are comprised of amplifier devices, said amplifier devices having the same characteristics and having the same bias voltage applied thereto.

2. A wireless telecommunication equipment according to claim 1, wherein said automatic gain control amplifier and said transmission power control amplifier have the same gain characteristic in accordance with a control signal input thereto when central gains of their variable gain range are 0 dB.

3. A wireless telecommunication equipment according to claim 1, wherein said automatic gain control amplifier and said transmission power control amplifier have the same circuitry.

4. A wireless telecommunication equipment having a receiver portion and a sender portion, comprising:

an automatic gain control amplifier located in the receiver portion of said equipment, said automatic gain control amplifier having a first central gain varied in accordance with an automatic gain control signal input thereto;

a transmission power control amplifier located in the transmitter portion of said equipment, said transmission power control amplifier having a second central gain varied in accordance with an open loop control signal input thereto; and

a plurality of fixed gain devices in said receiver and transmitter portions of said equipment, said fixed gain devices have gains allocated thereto which equalize said first central gain and said second central gain.

5. A mobile station of a CDMA cellular phone system comprising:

a receiver portion, said receiver portion including an automatic gain control amplifier having a first input for receiving an input signal, a second input for receiving a gain control signal, and an output;

a transmitter portion, said transmitter portion including a transmission power control amplifier having a first input for receiving a digital modulation signal, and a second input for receiving an open loop control signal, said automatic gain control amplifier and said transmission power control amplifier having substantially the same circuit; and

a logic processing unit, said logic processing unit including

a receive signal strength detector for receiving the output of said automatic gain control amplifier and having an output for outputting the gain control signal to the second input of said automatic gain control amplifier;

a closed loop power detector; and

an adder having a first input coupled to an output of said closed loop power detector and a second input coupled to the output of said receive signal strength detector, said adder outputting the open loop control signal to the second input of said transmission power control amplifier.

6. A mobile station of a CDMA cellular phone system according to claim 5, wherein an orthogonal demodulator and an analog to digital converter are interposed between the output of said automatic gain control amplifier and an input of said receive signal strength detector.

7. A mobile station of a CDMA cellular phone system according to claim 5, wherein an integrator is interposed between the output of said receive signal strength detector and the second input of said adder.

8. A mobile station of a CDMA cellular phone system according to claim 5 wherein a digital to analog converter is interposed between said integrator and the second input of said automatic gain control amplifier.

9. A mobile station of a CDMA cellular phone system according to claim 7 wherein a digital to analog converter is interposed between said integrator and the second input of said automatic gain control amplifier.