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Apparatus and method for controlling transmission power in mobile communication system

A technology for transmitting power control and power, applied in the field of mobile communication systems

Inactive Publication Date: 2005-08-03
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, spectral regrowth outside the signal band occurs in the power amplifiers 1-9, causing ACI

Method used

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  • Apparatus and method for controlling transmission power in mobile communication system
  • Apparatus and method for controlling transmission power in mobile communication system
  • Apparatus and method for controlling transmission power in mobile communication system

Examples

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no. 1 example

[0042] figure 2 is a block diagram of a BS transmitter in a mobile communication system using a single FA according to an embodiment of the present invention.

[0043] refer to figure 2 , the transmitter comprises a channel device set 2-1 comprising at least one channel element 2-2, I and Q pulse shaping filters 2-3 and 2-4, a frequency converter 2-5 and a power amplifier 2-6. In particular, a power controller 2-8 is placed between the pulse shaping filters 2-3 and 2-4 and the frequency converter to implement the CFR algorithm according to the present invention.

[0044] In operation, the channel device group 2-1 generates I and Q channel baseband signals by performing encoding, modulation and channelization on each channel data. Especially in CDMA systems, the I and Q channel signals are the chip-level sums of the I and Q channels of common control signals and user data for multiple users.

[0045] Since severe output power variations occur in systems such as CDMA system...

no. 2 example

[0077] The second embodiment of the present invention is applied to a BS in a mobile communication system supporting multi-FA.

[0078] Figure 13 is a block diagram of a BS transmitter in a mobile communication system using multiple FAs according to a second embodiment of the present invention;

[0079] refer to Figure 13 , the transmitter includes a channel device unit 13-1, a pulse shaping filter unit 13-2 and a power amplifier 13-4. Specifically, the multi-FA power controller 13-3 is placed between the pulse shaping filter unit 13-2 and the power amplifier 13-4 to control the PAPR of the original FA signal.

[0080] In operation, the channel device unit 13-1 has a plurality of channel element groups corresponding to FA and each channel element group includes figure 2 The represented channel element groups are identically structured channel devices and perform coding, modulation and channelization on each FA baseband signal. The channel equipment unit 13-1 independent...

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Abstract

An apparatus and method for maximizing the efficiency of a power amplifier by reducing the PAPR of a BS in a mobile communication system. A power controller between I and Q channel pulse shaping filters and a frequency converter calculates cancellation signals for signal pulses that increase the PAPR at each sampling period, pulse-shape-filters cancellation signals at the highest levels among the cancellation signals, and adds the filtered cancellation signals to the original signals. Thus, spectral regrowth outside a signal frequency band is suppressed, In the case of a system supporting multiple frequency allocations, the PAPR is controlled for each FA according to its service class. Therefore, minimum system performance is ensured and power use efficiency is increased.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a device and method for reducing the peak-to-average power ratio (PAPR) of a base station (BS) in the mobile communication system. Background technique [0002] As is well known, BSs use RF (radio frequency) power amplifiers for amplifying RF signals containing voice and data destined for mobile stations. The RF amplifier is the most expensive device in the entire system, so it is an important component to consider to reduce system cost. The RF amplifier should be designed to meet two requirements: one is that the output level is strong enough to cover the RF power of all MSs in the service area of ​​the cell; the other is that the RF power is at or below an acceptable level The amplifier output maintains ACI (adjacent channel interference). [0003] If the input power ensuring sufficient RF output power is outside the linear amplification region of the power amplifier, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/36H04B1/707H04B7/005H04B7/26H04J13/00H04W52/04H04W52/26H04W52/30H04W52/36H04W52/52
CPCH04B1/0475H04W52/36Y02B60/50H04W52/26H04W72/0453H04W52/52
Inventor 赵诚权梁相贤吴廷泰
Owner SAMSUNG ELECTRONICS CO LTD