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Method and mobile device for combined cell identity detection and cell measurement in LTE system

A technology for mobile devices and cells, which is used in transmission systems, multi-frequency code systems, modulated carrier systems, etc.

Inactive Publication Date: 2017-07-04
INTEL MOBILE COMM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, averaging over multiple frames and low-pass filtering the channel estimate does not help because the interference is not white noise like

Method used

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  • Method and mobile device for combined cell identity detection and cell measurement in LTE system
  • Method and mobile device for combined cell identity detection and cell measurement in LTE system
  • Method and mobile device for combined cell identity detection and cell measurement in LTE system

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Experimental program
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Embodiment Construction

[0031] Due to cell interference, the received signals of M cells overlap each other in the same cell-specific reference signal (CRS) resource element R j，l，f superior

[0032]

[0033] m is the cell index, j is the CRS subcarrier index in the frequency grid, l is the CRS OFDM symbol index within one radio frame, and f is the radio frame index. H is the channel response, and G is the transmitted CRS reference subcarrier.

[0034] refer to Figure 6 and 7 , a method and a preferred embodiment of a mobile device for jointly detecting cell ID and reference subcarrier received power are described.

[0035] The reception includes the first received cell-specific reference subcarrier R f，u，f The first OFDM symbol u, and in block 74 extract the received R j，u，f . The reception includes a second received cell-specific reference subcarrier R j，v，f of the second OFDM symbol v, and also extract the received R in block 74 j，v，f . as Figure 6 shown in and again in Figure 7 , s...

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Abstract

The present invention relates to a method and a mobile device for combined cell identity detection and cell measurement in an LTE system. The method includes: receiving a first OFDM symbol; extracting a first received cell-specific reference subcarrier of the first OFDM symbol; receiving a second OFDM symbol; extracting a second received cell of the second OFDM symbol specific reference subcarriers; generating received subcarrier pairs by computing the conjugate scalar product of the first received cell-specific reference subcarrier and the second received cell-specific reference subcarrier; providing a reference sequence, It includes reference subcarrier pairs for all possible combinations of cell IDs; correlating received subcarrier pairs with each reference subcarrier pair to generate a cell-specific correlation value associated with each cell ID; by searching for the highest Correlation values ​​and assigning the cell ID associated with the highest correlation value to the strongest cell to determine the cell ID of the strongest cell.

Description

technical field [0001] The present invention relates to a method and a mobile device for combined cell identity detection and cell measurement in an LTE system. Background technique [0002] 3GPP LTE is a communication standard using Orthogonal Frequency Division Multiplexing (OFDM). OFDM is particularly attractive for high data rate transmissions due to its potential for low-complexity receiver implementations. [0003] In OFDM, the transmission bandwidth is split into equally spaced orthogonal subbands with the same width. Orthogonality is maintained provided that the duration of the channel impulse response does not exceed the duration of the guard interval, and if the radio propagation channel conditions change slowly enough. These two requirements are met by an appropriate choice of system parameters such as subcarrier spacing and guard interval duration. then by the simple formula y k，l = h k，l x k，l +n k，l [0004] To describe the transmission of a data symbol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04W24/08H04L27/26
CPCH04L5/0048H04L5/0053H04L27/2613H04L27/2649
Inventor 浦天延V·奥厄
Owner INTEL MOBILE COMM GMBH
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