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Method for confirming actual emission power of transmitter

A technology of transmit power and maximum transmit power, which is applied in the direction of transmission control/equalization, transmission monitoring, data exchange network, etc., and can solve the problem of increasing transmit power of sub-channels.

Active Publication Date: 2008-04-02
LENOVO (BEIJING) CO LTD
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AI Technical Summary

Problems solved by technology

The reason why the transmit power has saturated power may be because when the transmit power increases to a certain value, the bit error rate (BER) of the system has reached the level we need, and there is no need to increase the transmit power to get better BER or performance; it may also be because the sub-channel spectral efficiency caused by the transmit power has reached the maximum spectral efficiency that the system can support
Obviously, in these cases, it does not make sense to increase the transmit power of the sub-channel

Method used

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  • Method for confirming actual emission power of transmitter
  • Method for confirming actual emission power of transmitter
  • Method for confirming actual emission power of transmitter

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Embodiment Construction

[0034] For the present invention, in order to carry out reasonable power allocation to the transmitter, it is first necessary to determine an ideal maximum transmission power for the transmitter, that is, the actual transmission power Ptol, and then determine the subchannel's power for each subchannel accordingly. Actual transmit power.

[0035] Before determining the actual transmit power, analyze the transmitter first.

[0036] If the CSIT of the transmitter is perfect, theoretically speaking, within the variable range of the transmit power, the performance of the MIMO system of the transmitter will always increase with the increase of the transmit power; but if the CSIT obtained by the transmitter is error, the performance obtained by the system does not always increase with the increase of the transmit power, the maximum transmit power is called the saturated transmit power, denoted as Pcsi, and the saturated transmit power of each sub-channel is called Pcsik, where, The ...

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Abstract

The present invention discloses a method for confirming the actual transmitting power of the transmitter, and the method comprises the following steps: a.calculating the saturated transmitting power Pcsi and other maximum transmitting power; b. confirming the least value in other maximum transmitting power and the saturated transmitting power Pcsi, and setting the least value as the actual transmitting power Ptol of the transmitter; c. confirming the final actual transmitting power Pk of each subchannel of the transmitter according to the confirmed actual transmitting power Ptol. The scheme of the invention facilitates that the transmitter does power distribution according to the actual need of each subchannel. The scheme of the invention settles the problem that the saturated transmitting power exists when the CSIT of the transmitter generates error, and the problem that the integral performance of the system deteriorates causing by the continuous increasing of the transmitting power when the target SNR which is corresponding to the set SNR or the supported frequency spectrum efficiency is larger than the saturated SNR that is caused by the CSIT error and is corresponding to the saturated transmitting power.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for determining the actual transmission power of a transmitter. Background technique [0002] The technology of transmitting and / or receiving using multiple antennas / antenna arrays (MIMO) is one of the core technologies of the next generation wireless communication system. The MIMO communication system uses Nt transmitting antennas and Nr receiving antennas for data transmission. The Nt×Nr dimensional MIMO channel formed by these transmitting and receiving antennas can be decomposed into L independent spatial sub-channels, where L<=min(Nt, Nr), and Nt and Nr are the number of transmitting and receiving antenna elements respectively . In this system, independent data streams can be sent in parallel on the L independent spatial sub-channels, so as to increase system spectrum efficiency. [0003] In many applications, the transmitter can obtain channel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04Q7/38H04B17/00H04L12/26
CPCY02B60/50
Inventor 刘云辉
Owner LENOVO (BEIJING) CO LTD
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