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Radio receiver, radio receiving method and recording medium

A radio receiver, radio technology, used in telephone communication, electrical components, communication between multiple stations, etc., can solve problems such as device provisioning

Inactive Publication Date: 2005-02-16
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, no means for setting the AGC circuit according to the transmission conditions is provided to the radio receiver, and therefore, it is impossible to always set the AGC circuit optimally

Method used

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  • Radio receiver, radio receiving method and recording medium
  • Radio receiver, radio receiving method and recording medium
  • Radio receiver, radio receiving method and recording medium

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0109] figure 1 is showing the structure of the radio receiver according to the first embodiment of the present invention.

[0110] exist figure 1 Among them, the radio receiver according to the first embodiment is configured to include an antenna 101, a low noise signal amplifier (LNA) 102, a local oscillator circuit (Local) 103, a frequency converter circuit (Mix) 104, an electric field strength detector 105 , gain control circuit 106 , signal processor part 107 , memory 108 and error rate measurement circuit 109 .

[0111] The antenna 101 receives a signal transmitted from a base station (not shown in the figure). The low noise signal amplifier 102 amplifies a signal received through the antenna 101 . The frequency converter circuit 104 performs frequency conversion by multiplying the signal amplified by the low noise amplifier 102 and the signal from the local oscillator circuit 103 .

[0112] When the electric field strength of the signal reaches the electric field ...

no. 2 example

[0179] Secondly, Figure 8 A block diagram showing the structure of a radio receiver according to a second embodiment of the present invention.

[0180] exist Figure 8 , the radio receiver according to the second embodiment is constructed to include an antenna 201, a low noise signal amplifier (LNA) 202, a local oscillator circuit (Local) 203, a frequency converter circuit (Mix) 204, an electric field strength detector 205 , gain control circuit 206 , signal processor part 207 , memory 208 and error rate measurement circuit 209 .

[0181] The antenna 201 receives a signal transmitted from a base station (not shown in the figure). The low noise signal amplifier 202 amplifies a signal received through the antenna 201 . The frequency converter circuit 204 performs frequency conversion by multiplying the signal amplified by the low-noise signal amplifier 202 and the signal from the local oscillator circuit 203 .

[0182] The electric field intensity detector 205 changes the v...

no. 3 example

[0243] Figure 15 The structure of a radio receiver according to a third embodiment of the present invention is shown.

[0244] exist Figure 15, the radio receiver according to the third embodiment is configured to include an antenna 301, a low noise signal amplifier (LNA) 302, a local oscillator circuit (Local) 303, a frequency converter circuit (Mix) 304, an electric field strength detector 305 , gain control circuit 306 , signal processor section 307 and memory 308 .

[0245] The antenna 301 receives a signal transmitted from a base station (not shown in the figure). The low noise signal amplifier 302 amplifies a signal received through the antenna 301 . The frequency converter circuit 304 performs frequency conversion by multiplying the signal amplified by the low-noise signal amplifier 302 and the signal from the local oscillator circuit 303 .

[0246] When the electric field strength of the signal according to the control parameter (signal CN3) reaches the electric ...

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PUM

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Abstract

A signal processing part 107 sets the operation start electric field value of AGC(automatic gain control) according to the measurement result of an error rate measuring circuit 109 which measures the error rate of a receive signal and makes a gain control circuit 106 start gain control when the electric field intensity detected by an electric field intensity detector 105 reaches the operation start, electric field value. Consequently, the optimum operation start electric field value of AGC can be set according to the radio wave state in which a radio receiver is placed, i.e., the reception state of the receive signal and the gain control of a gain control means can be performed so that the received signal has the best quality even in a state of IM characteristics or electric field variation characteristics, e.g. in environment of an intense electric field or large electric field variation.

Description

technical field [0001] The present invention relates to a radio receiver, a radio receiving method, and a recording medium for recording a program for executing the radio receiving method, and more particularly, to a step gain having a gain whose gain changes by a predetermined value when the signal level of a received signal exceeds a predetermined level A control type, a radio receiver of an automatic gain control circuit such as a continuous gain control type whose gain varies with the signal level of a received signal, a radio receiving method, and a recording medium. Background technique [0002] Radio receivers such as current pagers are equipped with automatic gain control (hereinafter abbreviated as "AGC") circuits, and intermodulation desensitization (hereinafter abbreviated as "IM") is improved by controlling the gain of the radio receiver features and features due to excess input. [0003] Here is a brief description of IM. "IM (Intermodulation Desensitization)"...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03G3/20H03G3/30H04B1/10H04B1/16H04B7/005H04B7/26H04B17/00H04M1/725
CPCH03G2201/103H03G3/3052H03G2201/202H03G2201/307H03G2201/706H04B17/0057H04B1/1027H04B17/318
Inventor 宫岛由典桥谷充彦
Owner PANASONIC CORP