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Method and device for estimating reference signal received power of orthogonal frequency division multiplexing system

A reference signal, orthogonal frequency division technology, applied in the multi-frequency code system, baseband system components and other directions, can solve the problem of not giving

Inactive Publication Date: 2011-09-28
ST ERICSSON SEMICON BEIJING
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Problems solved by technology

However, the standard does not give a specific method of measuring RSRP

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  • Method and device for estimating reference signal received power of orthogonal frequency division multiplexing system
  • Method and device for estimating reference signal received power of orthogonal frequency division multiplexing system
  • Method and device for estimating reference signal received power of orthogonal frequency division multiplexing system

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Embodiment Construction

[0039] According to the theory of wireless communication, reference signals within the range of coherent bandwidth and coherent time will have the same or similar channel estimation. The present invention is based on this principle to complete the estimation of RSRP. For the convenience of description later, a concept of a coherent block is proposed here. The so-called coherent block is a block composed of all REs within the coherent time range and the coherent bandwidth range.

[0040] refer to figure 2 The apparatus for estimating the reference signal received power of the OFDM system in the embodiment of the present invention mainly includes: an RS channel estimator, an RSRP calculator, an RSRP averager, a noise power canceller, and an RSRP smoother (optional).

[0041] In the following description, i represents the serial number of the transmitting antenna port; j represents the serial number of the receiving antenna; n represents the serial number of the coherent block;...

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Abstract

The invention provides a method and a device for estimating the reference signal received power (RSRP) of an orthogonal frequency division multiplexing (OFDM) system. The method comprises the following steps: A. carrying out the channel estimation of a received RS (reference signal); B. obtaining the corresponding RSRP through calculation according to the channel estimation results of all the RSsin the coherent block; C. perform the weighted average to the RSRPs corresponding to all the coherent blocks within the ranges of measuring frequency bandwidth and measuring time; D. carrying out thenoise power elimination on the RSRP obtained through the weighted average. The invention realizes the unbiased estimation of the RSRP.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method and a device for estimating Reference Signal Received Power (RSRP) of an Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0002] In the long-term evolution (LTE) wireless communication system, OFDM is its core physical layer technology. It modulates the data stream on multiple orthogonal sub-carriers, and the frequency spectrum between the orthogonal sub-carriers can overlap, thus greatly improving the spectrum utilization. [0003] refer to figure 1 , in an OFDM system, the transmitted information can be described by a resource grid, which expresses the resources in the entire time domain and frequency domain in the form of resource elements (RE, Resource Element), namely figure 1 A minimum square in , which corresponds to the time length of one subcarrier in the frequency domain and one symbol in the time dom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 许百成
Owner ST ERICSSON SEMICON BEIJING
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