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Pilot frequency transmission method and device, and channel estimation method and device

A technology of channel estimation and transmission method, applied in the directions of multi-frequency code systems, baseband system components, etc., can solve the problem of high wireless resource overhead, and achieve the effect of saving wireless resources

Inactive Publication Date: 2016-03-30
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In this method, the relay node needs to provide wireless resources for its own pilot and the pilot of the source node respectively, and the overhead of wireless resources is relatively large.

Method used

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  • Pilot frequency transmission method and device, and channel estimation method and device
  • Pilot frequency transmission method and device, and channel estimation method and device
  • Pilot frequency transmission method and device, and channel estimation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Figure 4 It is a schematic structural diagram of a channel estimation system according to Embodiment 1 of the present invention. like Figure 4 As shown, the system includes:

[0092] The relay node 401 is configured to receive a first pilot signal, where the first pilot signal is generated by at least one first pilot sequence; and generate according to the received first pilot signal and its own second pilot sequence The third pilot signal; sending the generated third pilot signal to the target node 402 from the same radio resource position;

[0093] The target node 402 is configured to receive the third pilot signal sent by the relay node 401, and perform channel estimation according to the third pilot signal;

[0094] Wherein, the pilot sequences including the at least one first pilot sequence and the second pilot sequence are orthogonal to each other.

[0095] The channel estimation system in Embodiment 1 can be used for uplink channel estimation, and can also ...

Embodiment 2

[0127] Figure 5 It is a flow chart of the pilot sending method according to Embodiment 2 of the present invention. like Figure 5 As shown, the method includes:

[0128] S501: Receive a first pilot signal, where the first pilot signal is generated by at least one first pilot sequence;

[0129] S502: Generate a third pilot signal according to the received first pilot signal and its own second pilot sequence;

[0130] S503: Send the generated third pilot signal from the same radio resource position;

[0131] Wherein, the pilot sequences including at least one first pilot sequence and the second pilot sequence are orthogonal to each other.

[0132] Optionally, in step S502, generating a third pilot signal includes:

[0133] The received first pilot signal is amplified and superimposed on the second pilot signal generated by its own second pilot sequence to generate a third pilot signal.

[0134] Optionally, the first pilot signal is from a first node having multiple transm...

Embodiment 3

[0144] Image 6 It is a flow chart of the channel estimation method in Embodiment 3 of the present invention. like Image 6 As shown, the method includes:

[0145] S601: Receive a third pilot signal from the same radio resource position of the relay node, where the third pilot signal is at least one first pilot sequence of at least one first node relayed by the relay node and the relay node generated by the second pilot sequence;

[0146] S602: Perform channel estimation according to the third pilot signal received from the relay node;

[0147] Wherein, the pilot sequences including at least one first pilot sequence and the second pilot sequence are orthogonal to each other.

[0148] Optionally, before performing channel estimation in step S602, further include:

[0149] receiving a fourth pilot signal from at least one first node, the fourth pilot signal being generated from at least one first pilot sequence;

[0150] Step S602 performing channel estimation includes: pe...

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Abstract

The invention relates to the technical field of wireless communication, and especially relates to a pilot frequency transmission method and device, and a channel estimation method and device, so as to reduce the cost of wireless resources which is provided by a relay node and occupied by pilot frequency. The pilot frequency transmission method provided by the embodiment of the invention comprises the steps: receiving a first pilot frequency signal which is generated by at least one first pilot frequency sequence; generating a third pilot frequency signal according to the received first pilot frequency signal and a build-in second pilot frequency sequence; and enabling the generated third pilot frequency signal to be transmitted outwards from the same wireless resource position. The third pilot frequency signal occupies the same wireless resource, thereby saving the wireless resources occupied by the pilot frequency signals. Moreover, because at least one first pilot frequency sequence generating the first pilot frequency signal and the second pilot frequency sequence are orthogonal mutually, a receiving end can distinguishes all first pilot frequency sequence and the second pilot frequency sequence from the third pilot frequency signal, thereby achieving the channel estimation according to all pilot frequency sequences.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a pilot transmission method and device, and a channel estimation method and device. Background technique [0002] Relay technology, applied to wireless communication systems, can effectively increase the transmission rate of cell edge users, increase system capacity, and effectively extend cell coverage. [0003] Generally, a wireless communication system using a relay technology includes: a source node, a relay node, and a target node. Among them, the source node sends data, the relay node forwards data, and the target node receives data. figure 1 In the shown relay system, in uplink transmission, the user terminal is the source node, and the base station is the target node; in downlink transmission, the base station is the source node, and the user terminal is the target node. [0004] figure 2 It shows a frame structure of a relay subframe for data t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 吴艺群周星宇陈巍
Owner HUAWEI TECH CO LTD
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