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Method, equipment and system for allocating power

A technology of power coefficient and total transmit power, which is applied in the field of power distribution in dual space-time transmit diversity mode, can solve the problems of poor system performance and high bit error rate of received signals, and achieve the effect of improving performance and reducing bit error rate

Active Publication Date: 2014-09-03
HUAWEI TECH CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, expressing S as It can be seen from observation that the S under the D-STTD mode is a transmission matrix with its own structural characteristics, but the equal power allocation scheme in the prior art does not consider the transmission of signals in combination with this characteristic and the channel conditions of the MIMO system Power, which leads to poor system performance and high bit error rate of received signals

Method used

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  • Method, equipment and system for allocating power
  • Method, equipment and system for allocating power
  • Method, equipment and system for allocating power

Examples

Experimental program
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Embodiment 1

[0031] This embodiment discloses a method for allocating power. like figure 2 As shown, the method includes:

[0032] Step 101, the receiving end acquires detection parameters according to the channel information in the equivalent channel model in D-STTD mode;

[0033] Next, the equivalent channel model in the D-STTD mode mentioned in this embodiment will be introduced by taking the transmission model (that is, formula 1) in the 4*2D-STTD mode as an example.

[0034] The equivalent transmission model (2) can be obtained by performing equivalent transformation on the above formula (1)

[0035]

[0036] in, is the equivalent receiving matrix; is the equivalent channel matrix, in each embodiment of the present invention, the equivalent channel model can use the equivalent matrix stands for different h i，j may be collectively referred to as channel information; is the equivalent emission matrix; is the equivalent noise matrix. It can be seen from formula (2) that...

Embodiment 2

[0044] This embodiment specifically provides a method for allocating power in combination with the transmission model of the 4*2D-STTD mode. The principle of allocating power in this embodiment of the present invention will first be introduced below.

[0045] According to the equivalent channel matrix in (2) calculate The following formula can be obtained:

[0046] H ~ H H ~ = C 0 0 A B 0 C 1 - B A A ...

Embodiment 3

[0120] This embodiment provides a receiving end 300 for allocating power, which can be used as the receiving end in Embodiment 2. like Figure 4 As shown, the receiving end 300 includes: a parameter acquisition unit 31 , a coefficient acquisition unit 32 , and a feedback unit 33 .

[0121] The parameter acquisition unit 31 is used to acquire the detection parameters according to the channel information in the equivalent channel model in the D-STTD mode; the coefficient acquisition unit 32 is used to acquire the detection parameters according to the parameter acquisition unit 31, the noise parameters of the received signal and The total transmission power of the transmitting end obtains the power coefficient of at least one signal; the feedback unit 33 is configured to feed back the power coefficient obtained by the coefficient obtaining unit 32 to the transmitting end.

[0122] In addition, in this embodiment, the at least one signal can be specifically: four signals; at this...

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Abstract

The embodiment of the invention discloses a method, equipment and system for allocating power, and relates to the technical field of wireless communication, and the method, equipment and system provided by the invention are used for solving the technical problem of worse performances of a communication system under a D-STTD (double space time transmit diversity) mode in the prior art. The method comprises the following steps: obtaining detection parameters according to channel information in an equivalent channel model under the D-STTD mode; obtaining power coefficient of at least one-channel signal according to the detection parameters, noise parameters of received signals and total transmitting power of a transmitting end; and feeding the obtained power coefficient back to the transmitting end so that the transmitting end allocates the transmitting power for at least one-channel signal according to the power coefficient. The embodiment of the invention is mainly applied to an MIMO (multiple input multiple output) communication system.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a power allocation method, device and system in a double space time transmit diversity (DoubleSpace Time Transmit Diversity, D-STTD) mode. Background technique [0002] Multiple Input Multiple Output (MIMO) technology is a hotspot of smart antenna technology in the field of wireless communication technology at present. It uses the transmission channel increased in the space, and transmits signals by using multiple antennas at the sending end and receiving end. , to improve the capacity and spectrum utilization of the communication system. [0003] Among the various existing MIMO receiving methods, the linear MIMO equalized receiving method is widely used due to its low complexity. In addition, in an actual communication system, due to cost considerations, the base station is usually equipped with more antennas than the terminal. In this case, a typical D-S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W52/42H04W52/48
Inventor 余荣道吴涛
Owner HUAWEI TECH CO LTD
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