Unlock instant, AI-driven research and patent intelligence for your innovation.

Emission power regulation method and system

A technology of transmit power and adjustment method, applied in power management, multi-frequency code system, code division multiplexing system, etc. Effects of coherent detection performance

Inactive Publication Date: 2008-12-03
HUAWEI TECH CO LTD
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to address the defect of poor performance of non-coherent detection when sending control information in FDD mode, and propose a transmission power adjustment method and system, which can adjust the uplink according to the symmetrical characteristics of uplink and downlink channels in TDD mode. Transmit power of , obtain good non-coherent detection performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Emission power regulation method and system
  • Emission power regulation method and system
  • Emission power regulation method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The embodiment of the present invention utilizes the symmetry of the uplink and downlink channels in TDD mode to obtain channel gain before signal transmission, and then adjusts the transmission power, so as to realize the improvement of non-coherent detection performance of the uplink channel.

[0024] Such as figure 1 As shown in , it is a schematic flowchart of the first embodiment of the transmission power adjustment method of the present invention. This embodiment includes the following steps:

[0025] Step 101, obtain the channel gain value of each subcarrier according to the downlink pilot signal received by the terminal;

[0026] Step 102, before performing uplink transmission, adjust the original transmit power of each subcarrier signal according to the channel gain value, to obtain the actual transmit power of each subcarrier signal.

[0027] This embodiment is applicable to a mobile communication system adopting TDD mode. In this mode, receiving and transmi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for adjusting the emission power, which includes the following steps of getting the channel gain value of each time-frequency section according to the down pilot signal received at the terminal, and making adjustment on the original emission power of each time-frequency section signal according to the channel gain value before the up emission is made, and so the actual signal emission power of each time-frequency section can be obtained. The invention also relates to an emission power adjustment system, which includes a channel gain capture module and an emission power adjustment module. The embodiment of the invention utilizes the symmetry of the up and down channels of the TDD system to adjust the original emission power of each sub-carrier signal according to the channel gain value obtained by the down pilot signal, which reduces the destruction on the orthogonality of the up control channel caused by the time-varying channel and improves the non-coherent detection performance of the up channel.

Description

technical field [0001] The present invention relates to the field of carrier communication, in particular to a transmission power control method and system suitable for a Time Division Duplex (TDD for short) system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier transmission technology that can divide the frequency spectrum into many sub-carriers, and each sub-carrier is modulated at a lower rate. Multipath delay capability, so it is widely used in cellular mobile systems. By assigning different subcarriers to different users, multiple access of OFDM can be realized, that is, OFDMA. Each narrowband subcarrier adopts a different modulation method, such as 16QAM, 64QAM, etc., and then adopts an inverse fast Fourier transform (Inverse Fast Fourier Transforms, IFFT for short) to provide OFDM modulation. The data to be transmitted is mapped to OFDM symbols, and after IFFT, a cyclic prefix is ​​added and sent out. The receivin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04L27/26H04J13/02
CPCH04W52/146H04W52/246H04W52/241
Inventor 阮卫杜颖钢
Owner HUAWEI TECH CO LTD