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Pilot sending method and apparatus based on MIMO

A transmission method and multi-output technology, applied in multi-frequency code systems, baseband system components, and preventing/detecting errors through diversity reception, can solve problems such as total signal power fluctuations, and achieve overcoming power fluctuations, improving efficiency, The effect of avoiding fluctuations in transmit power

Active Publication Date: 2012-04-25
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of realizing the present invention, the inventor found that: the above situation will cause the total signal power of each antenna to fluctuate on odd symbols and even symbols

Method used

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  • Pilot sending method and apparatus based on MIMO
  • Pilot sending method and apparatus based on MIMO
  • Pilot sending method and apparatus based on MIMO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, taking two antennas as an example, the corresponding pilot structures of the two antennas are as follows: image 3 As shown, the pilots of each antenna are evenly distributed on the parity symbols and sent.

[0033] refer to image 3 As shown, the corresponding number of antennas is 2, that is, antennas 0 and 1, and 18×6 resource units are used for information transmission, where the corresponding frequency-based subcarrier numbers are 0 to 17, and the time-based subcarrier numbers are 0 to 5, and a frequency-based subcarrier number and a time-based subcarrier number can uniquely determine a subcarrier symbol.

[0034] Such as image 3 As shown, the corresponding process of averagely sending the pilot signals of each antenna may include:

[0035] The sub-carriers whose frequency-based sub-carrier numbers are 1, 4, 7, 10, 13, and 16 and whose time-based sub-carrier numbers are 0, 4, 2, 1, 5, and 3 are sequentially performed on the sub-carriers. Th...

Embodiment 2

[0038] In this embodiment, specifically taking four antennas as an example, the pilot structure of the corresponding four antennas is as follows Figure 4 As shown, the pilots of the four transmit antennas are evenly distributed on the parity symbols and sent.

[0039] refer to Figure 4 As shown, the corresponding number of antennas is 4, that is, antennas 0, 1, 2, and 3, and 18×6 resource units are used for information transmission, where the corresponding frequency-based subcarrier numbers are 0 to 17, and time-based The subcarrier numbers are 0 to 5, and a frequency-based subcarrier number and a time-based subcarrier number can uniquely determine a subcarrier symbol.

[0040] Such as Figure 4 As shown, the corresponding process of averagely sending the pilot signals of each antenna may include:

[0041]The sub-carriers whose frequency-based sub-carrier numbers are 1, 4, 7, 10, 13, and 16 and whose time-based sub-carrier numbers are 0, 4, 2, 1, 5, and 3 are sequentially...

Embodiment 3

[0049] refer to Figure 5 As shown, the corresponding process of averagely sending the pilot signals of each antenna may include:

[0050] On the subcarriers whose frequency-based subcarrier numbers are 1, 5, 10, and 14, and whose time-based subcarrier numbers are 0, 4, 1, and 5, the first antenna (that is, antenna 0) is sequentially performed. transmission of pilot signals;

[0051] On the subcarriers whose frequency-based subcarrier numbers are 1, 5, 10, and 14, and whose time-based subcarrier numbers are 1, 5, 0, and 4, the second antenna (that is, antenna 1) is sequentially performed. Transmission of pilot signals.

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Abstract

The invention discloses a method for transmitting pilot frequency based on multiple-input multiple-output and a device. The method mainly comprises the following step: in a subcarrier used for transmitting pilot frequency signals in a time slot of a multiple-input multiple-output system, the pilot frequency signals of each antenna are transmitted on average on symbols with subcarrier numbers of odd number and even number based on time. As the embodiment of the invention ensures even distribution of pilot frequency of each antenna on each symbol, the power fluctuation among symbols can be overcome, thus avoiding the fluctuation of antenna transmitting power, and further improving the efficiency of a power amplifier.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a pilot transmission technology based on multiple input and multiple output. Background technique [0002] At present, in WiMAX (Worldwide Interoperability for Microwave Access) network, LTE (Long Term Evolution) network or UMB (Ultra Mobile Bandwidth) network, the physical layer usually adopts OFDM (Orthogonal Frequency Division Multiplexing) technology and MIMO (Multiple Input Multiple Output) technology. ) technology to improve spectrum efficiency and system capacity. [0003] Among them, for the MIMO technology adopted in the WiMAX network based on IEEE 802.16e, the allocation mode of the corresponding physical layer air interface resources includes the BandAMC (band adaptive) mode. In this BandAMC mode, the channel division method adopted can be as follows: figure 1 As shown, in the frequency dimension, all available subcarriers are divided by 18 cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02H04L1/06
Inventor 徐波
Owner XFUSION DIGITAL TECH CO LTD
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