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Parallel computing method for channel estimation of common-frequency cells with different RS biases in LTE (long term evolution)

A co-frequency cell and channel estimation technology, applied in transmitter/receiver shaping network, wireless communication, electrical components, etc., can solve problems affecting communication quality and achieve the effect of removing co-frequency interference

Inactive Publication Date: 2014-12-17
WUXI GAOLIAN INFORMATION TECH
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Problems solved by technology

Because the user terminal UE can receive signals from the serving cell and neighboring cells on the same frequency at the same time, this same-frequency interference will obviously affect the communication quality

Method used

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  • Parallel computing method for channel estimation of common-frequency cells with different RS biases in LTE (long term evolution)
  • Parallel computing method for channel estimation of common-frequency cells with different RS biases in LTE (long term evolution)
  • Parallel computing method for channel estimation of common-frequency cells with different RS biases in LTE (long term evolution)

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Embodiment Construction

[0020] A parallel calculation method for intra-frequency cell channel estimation with different RS offsets in LTE, comprising the following steps: Step 1: initialize a data signal received by a serving cell at an RS position of a neighboring cell;

[0021] r ^ k , l ( data , Scell ) = 0 ;

[0022] k ∈ K RS ( Ncell ) ( l ) , l ∈ L RS ( Ncell )

[0023] Initialize the data signal received by the neighboring cell at the RS position of the serving cell;

[0...

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Abstract

The invention discloses a parallel computing method for channel estimation of common-frequency cells with different RS biases in LTE (long term evolution). The parallel computing method mainly includes the following steps: subtracting data signal interference of a neighbor cell from a reference signal position of a service cell to acquire a clean reference signal of the service cell; subtracting data signal interference of the service cell from a reference signal position of the neighbor cell to acquire a clean RS signal of the neighbor cell; on the basis of the clean RS signal of the service cell, performing conventional channel estimation at RS positions of the service cell and the neighbor cell; restructuring a service cell data signal located at the RS position of the neighbor cell; restructuring a neighbor cell data signal located at the RS position of the service cell; if number of iteration times does not reach a threshold value, repeating the steps 2-6, or, finishing operation. By the parallel computing method, data on two receiving antennas are merged to offset signals from the neighbor cell, and the service cell signal is demodulated, so that common-frequency interference can be removed effectively when a local cell and the neighbor cell are different in RS bias.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a parallel calculation method for channel estimation of intra-frequency cells with different RS offsets in LTE. Background technique [0002] In a wireless cellular communication system, if the serving cell and the surrounding cells share the same frequency. The UE of the serving cell will suffer from co-channel interference. Because the user terminal UE can simultaneously receive signals from the serving cell and the adjacent cell on the same frequency, such co-channel interference will significantly affect the communication quality. [0003] The LTE system also has such a problem. From the perspective of the user terminal, the influence of co-channel interference is multi-faceted, such as initial cell search, channel estimation, data demodulation, and measurement. SUMMARY OF THE INVENTION [0004] The purpose of the invention is to provide a parallel calculation method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03H04W24/00
Inventor 杨龙波
Owner WUXI GAOLIAN INFORMATION TECH
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