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Transmission method and transmission device

A transmission method and a technology of a transmission device, which are applied to components of an amplifying device, improving the amplifier to reduce nonlinear distortion, modulation, etc., can solve problems such as maintaining the same, and achieve the effect of suppressing changes

Inactive Publication Date: 2009-09-09
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the scalar coefficient multiplied by the envelope of the amplitude path does not necessarily have to be maintained in uncompressed mode

Method used

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  • Transmission method and transmission device
  • Transmission method and transmission device
  • Transmission method and transmission device

Examples

Experimental program
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Embodiment approach 1

[0062] Figure 6 The configuration of the transmission device according to the embodiment of the present invention is shown. The transmitting device 100 includes: a polarization signal generation circuit 101, a phase modulation signal generation circuit 102, a power amplifier (PA) 103, an amplitude control circuit 104, and a variable amplification circuit composed of a variable gain amplifier (VGA) and / or an attenuator 105 , an antenna 111 , and a power alignment loop (PAL, power alignment loop) 110 . The PAL 110 includes a detection circuit (for example, a PIN diode or other semiconductor detector) 106 for detecting the output power of the PA 103 , a low-pass filter (LPF) 108 , an analog-to-digital converter (ADC) 109 , and a transmission power control unit 107 .

[0063] The polarization signal generating circuit 101 generates an amplitude component signal and a phase component signal from an input signal. Specifically, the polarization signal generating circuit 101 operat...

Embodiment approach 2

[0193] In this embodiment, the following method and device are provided, that is, based on the method and device of Embodiment 1, it can further satisfy, for example, Figure 4 The power control accuracy requirements shown.

[0194] Whether to make PA103 operate in compressed mode or in uncompressed mode depends on the application. In a representative implementation for W-CDMA, the minimum power level (Pc,min) in compressed mode is specified as 0dBm, with an overlap region of 6dB width (+ / - 2dB plus an additional 2dB as a margin).

[0195] During operation, the transmitting device 100 receives commands to increase or decrease the output power so as to conform to the network operating environment. For example, as mentioned above, in the UMTS application, the TPC command requires the transmitting device 100 to increase or decrease the output power in units of + / -1 dB, + / -2 dB, . . . . If, as described above, the output power level is still in the uncompressed mode area when t...

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Abstract

According to a transmission power control signal including information on a transmission power change amount DeltaP, it is possible to decide whether to perform mode switching between a compressed mode and a non-compressed mode by referencing an output power level of a power amplifier (103) or to perform mode switching between the compressed mode and the non-compressed mode without referencing the output power level of the power amplifier (103). Thus, it is possible to operate a measurement unit such as a detection circuit (106), an LPF (108), and an ADC (109) only when substantially required. Accordingly, it is possible to suppress thefluctuation (output power discontinuity) of the transmission power attributed to mode switching with a low power consumption.

Description

technical field [0001] The present invention relates to a transmission device and a transmission method using a power amplifier (hereinafter referred to as PA). Background technique [0002] Cellular communication technology is constantly being developed in order to satisfy users' demands for high-speed and reliable communication. The first generation (1G) of analog communication systems has been replaced by the second generation (2G) of digital communication systems, such as GSM (Global System for Mobile Communications, Global System for Mobile Communications). In recent years, these 2G systems have been enhanced by the introduction of GPRS (General Packet Radio Service), and the data rate of the extended GSM, namely EDGE (enhanced data rates for GSMevolution, enhanced data rates for GSM evolution) wireless service has been enhanced . This allows the user to perform data communication in addition to voice communication. Currently, W-CDMA (Wide-Band Code Division Multiple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/24H03F1/32H04B1/04
CPCH03F2200/105H03F1/0222H03C5/00H03F2200/504H03F2200/324H04B1/0475H03F1/0205H03G3/3042H03F2200/465H03F1/0211H03F3/24H03F2200/451
Inventor 厄尔·麦丘恩加里·多韦恩·李戴尔·弗劳尔斯
Owner PANASONIC CORP
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