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Channel equalization method and communication equipment

A technology of channel equalization and channel state information, applied in baseband systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems affecting network transmission efficiency, large amount of wireless network data, and unfavorable full application of wireless resources And other issues

Active Publication Date: 2014-07-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, in the prior art, in order to ensure the accuracy of the pilot signal, it is determined that the pilot signal generally adopts a low-order modulation modulation method, and at the same time, with the development of data communication technology, the data to be transmitted is getting larger and larger. The modulation of data signals by low-order modulation is not conducive to the full application of wireless resources, and it is easy to cause a large amount of data in the wireless network, which affects the efficiency of network transmission

Method used

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  • Channel equalization method and communication equipment
  • Channel equalization method and communication equipment
  • Channel equalization method and communication equipment

Examples

Experimental program
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Embodiment 1

[0096] see figure 1 As shown, this embodiment provides a channel equalization method for multiple-input multiple-output communication, the method mainly includes the following process:

[0097] Step 101: The receiver receives modulation coefficient information.

[0098] In this embodiment, before transmitting the communication signal including the service data signal and the pilot signal, the transmitter first sends the modulation coefficient information corresponding to the communication to be sent to the receiver at the opposite end, so that the receiver can receive the communication signal Before receiving the modulation coefficient information corresponding to the communication signal.

[0099] The modulation coefficient includes: a pilot modulation coefficient and a data modulation coefficient. The pilot modulation coefficient is the modulation coefficient used by the transmitter when modulating the pilot signal in the communication signal, and the data modulation coeff...

Embodiment 2

[0116] In this embodiment, how to receive a MIMO signal sent by a single radio frequency channel MIMO (Single RF MIMO) transmitter and perform channel equalization on the received MIMO signal as an example, further analyzes the technical solution of the present invention in detail.

[0117] The transmitter of Single RF MIMO has only one radio frequency link channel. In a Single RF MIMO network, the structure of its Single RF antenna is as follows figure 2 Show.

[0118] Depend on figure 2 See, the single RF MIMO communication device is only equipped with an antenna entity 201, also known as the antenna excitation element 201 (active element), the antenna excitation element 201 can send signals and receive signals from the baseband through the radio frequency link, as shown in the figure S0;

[0119] Two parasitic elements 202 (Parasitic Elements) are arranged symmetrically beside the antenna excitation element 201 . Each parasitic element 202 does not have a radio freque...

Embodiment 3

[0179] see Figure 5 As shown, this embodiment provides a communication device, which mainly includes the following components: an antenna 501 , a storage unit 502 , a channel estimation unit 503 , a channel state information adjustment unit 504 and a channel equalization unit 505 . The connection relationship and working principle of each part are as follows:

[0180] The antenna 501, as a radio frequency component of the communication device, is used to send and receive signals.

[0181] In this embodiment, the signal received by the communication device through the antenna 501 includes: the modulation coefficient information sent by the receiving transmitter to the communication device before sending the signal containing the pilot signal and the data signal, wherein the modulation coefficient information includes: the pilot modulation coefficient , and the data modulation coefficient. When the antenna 501 receives the modulation coefficient information, it stores the pil...

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Abstract

The invention relates to the communication field and discloses a channel equalization method and communication equipment. The method comprises steps: a receiver receives information of modulation factors, wherein the modulation factors comprise pilot modulation factors and data modulation factors; the receiver receives communication signals, wherein the communication signals comprise pilot signals and data signals; the receiver acquires initial channel state information of the channel where the communication signals pass according to the received pilot signals, the known pilot transmission signals and the pilot modulation factors; the receiver adjusts the initial channel state information according to the data modulation factors and the pilot modulation factors to obtain each piece of final channel state information of the channel; and the receiver carries out channel equalization on the received data signals according to each piece of final channel state information and carries out demodulation and recovery to obtain the transmission signals of the data signals. when the technical scheme is applied, accuracy of channel equalization can be improved, and the data communication effects are improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a channel equalization method for multiple-input multiple-output communication and communication equipment. Background technique [0002] The performance of the wireless communication system is greatly affected by the wireless channel, such as shadow fading and frequency selective fading, etc., which makes the propagation path between the transmitter and receiver very complicated. The wireless channel is not fixed and predictable like the wired channel, but has great randomness, which poses a great challenge to the design of the receiver. [0003] In the existing communication system, in order to accurately restore the transmitted signal at the transmitting end at the receiving end, people adopt various measures to resist the influence of multipath effect on the transmission signal, and it is necessary to estimate the channel parameters when receiving information. Obtain accurate chann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/0228H04L25/03006
Inventor 吴涛卢伟山
Owner HUAWEI TECH CO LTD
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