Mapping method for reference signals and physical resource block

A technology of physical resource blocks and reference signals, applied in communication between multiple stations, multi-frequency code system, etc., can solve the problems of high complexity in the implementation of mapping methods

Active Publication Date: 2009-12-02
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for mapping reference signals and physical reso

Method used

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  • Mapping method for reference signals and physical resource block
  • Mapping method for reference signals and physical resource block
  • Mapping method for reference signals and physical resource block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7

[0060] Alternative embodiment 7, the number of multiple reference signals is 8, the 8 reference signals are mapped to the 4 OFDM symbols of the physical resource block, and the mapping of each reference signal to the M subcarriers on the OFDM symbol specifically includes the following At least one method:

[0061] Method 1: Map multiple reference signals in the first reference signal to the following time-frequency positions: subcarrier A, subcarrier A+4, subcarrier (A+8) of the first OFDM symbol of the 4 OFDM symbols mod 12; Map multiple reference signals in the second reference signal to the following time-frequency positions: subcarrier A, subcarrier A+4, subcarrier (A+8) of the second OFDM symbol of the 4 OFDM symbols mod 12; Map multiple reference signals in the third reference signal to the following time-frequency positions: subcarrier A+B, subcarrier A+4+B, subcarrier ( A+8+B)mod12; Map multiple reference signals in the fourth reference signal to the following time-frequen...

Embodiment 8

[0065] Alternative embodiment 8, the number of multiple reference signals is 8 channels, the 8 channels of reference signals are mapped to 2 OFDM symbols of the physical resource block, and the mapping of each channel of reference signals to M subcarriers on the OFDM symbol specifically includes: Map multiple reference signals in the first reference signal to subcarrier A, subcarrier A+4, subcarrier (A+8) mod 12 of the first OFDM symbol of the two OFDM symbols; change the second reference signal The multiple reference signals in the signal are mapped to subcarrier A+2, subcarrier A+6, and subcarrier (A+10) mod 12 of the second OFDM symbol of the two OFDM symbols; Multiple reference signals are mapped to subcarrier A+1, subcarrier A+5, subcarrier (A+9) mod 12 of the first OFDM symbol of the two OFDM symbols; multiple reference signals in the fourth channel are mapped Signal mapping of the second OFDM symbol of the two OFDM symbols to subcarrier A+3, subcarrier A+7, subcarrier (A+11...

example 1

[0082] This example describes the mapping of physical resource blocks that transmit a layer of reference signals in a subframe.

[0083] Figure 5a It is a schematic diagram of the position of the reference signal in the physical resource block when the subframe uses the conventional cyclic prefix, such as Figure 5a As shown, the reference signal #0 of layer 1 is included, and the physical resource block includes 12 subcarriers in the frequency domain and 14 OFDM symbols in the time domain, and A=0.

[0084] Map layer 1 reference signal #0 to the following time-frequency positions of the above physical resource block: subcarrier #0, subcarrier #4, and subcarrier #8 of the fourth OFDM symbol, and subcarrier# of the seventh OFDM symbol 2. Subcarrier #6, subcarrier #10, subcarrier #0 of the 10th OFDM symbol, subcarrier #4, subcarrier #8, subcarrier #2 of the 13th OFDM symbol, subcarrier #6, subcarrier Carrier #10.

[0085] Figure 5b It is a schematic diagram of the position of th...

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Abstract

The invention provides a mapping method for reference signals and a physical resource block, which is used for mapping one-path or multi-path reference signals to the physical resource block of a long-term evolution system, wherein the physical resource block comprises 12 subcarriers on a frequency domain and comprises two continuous time slots with equal time domain lengths, and each path of reference signal comprises a plurality of reference signals. The method comprises the following steps: mapping the one-path or multi-path reference signals to N orthogonal frequency division multiplexing (OFDM) symbols of the physical resource block, wherein N is selected from one of 2, 3 and 4; and mapping each path of reference signals to M subcarriers on the OFDM symbols, wherein M is selected from one of 1, 2, 3 and 4. By defining the position of each reference signal in the physical resource block based on lamination, the method is comparatively simple to realize, improves the performance of an LTE system, is favorable for expanding to the design of the reference signals of high-order MIMO, and has good forward compatibility.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a method for mapping reference signals and physical resource blocks. Background technique [0002] The Long Term Evolution (LTE) system is an important plan of the third-generation partner organization. When the LTE system adopts the conventional cyclic prefix, one time slot contains 7-length uplink / downlink symbols, and when the LTE system adopts the extended cyclic prefix, one time slot contains 6-length uplink / downlink symbols. figure 1 It is a schematic diagram of the physical resource block structure when the system bandwidth of the LTE system is 5MHz, such as figure 1 As shown, a resource element (ResourceElement, abbreviated as RE) is a subcarrier in an OFDM symbol, and a downlink resource block (Resource Block, abbreviated as RB) consists of 12 consecutive subcarriers and 7 consecutive (extended cyclic) The prefix is ​​composed of 6 OFDM symbols. A resource unit is ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B7/26
Inventor 戴博孙云锋郁光辉杨勋
Owner ZTE CORP
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