Eight antenna codebook design method by reusing LTE codebook

A design method, eight-antenna technology, applied in the direction of preventing/detecting errors through diversity reception, which can solve problems such as the inability to meet the requirements of LTE-A systems

Active Publication Date: 2013-04-03
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the defect that the existing codebook cannot meet the needs of the LTE-A system, thereby providing a codebook design method that can meet the LTE-A system

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  • Eight antenna codebook design method by reusing LTE codebook
  • Eight antenna codebook design method by reusing LTE codebook
  • Eight antenna codebook design method by reusing LTE codebook

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Embodiment Construction

[0041] The present invention will be described below in conjunction with the accompanying drawings and specific embodiments.

[0042] Considering the excellent characteristics of the four-antenna HH codebook of LTE R8, such as nesting and limited alphabet, and the good performance of the rotation-based DFT codebook at low ranks, the present invention combines these two codebooks to generate An eight-antenna codebook for the LTE-Advanced system. The generation method is as follows:

[0043] Step 1. Based on the rotated DFT codebook, generate an eight-antenna codebook CB with rank 1 (1) .

[0044] Step 2. Recombine the four-antenna HH codebook of LTE R8 to generate an eight-antenna LTE-Advanced codebook CB with rank 8 (8) .

[0045] Step 3. According to the order of ranking from high to low, the eight-antenna LTE-Advanced codebook CB with rank 8 obtained in step 2 (8) Based on this, select a subset of column vectors from high-rank codewords, generate low-rank codewords, and...

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Abstract

The invention provides an eight antenna codebook design method by reusing an LTE codebook, which comprises the following steps of: based on a rotary DFT codebook, generating an eight antenna codebook of which the order is 1; recombining an LTE R8 four antenna HH codebook to generate an eight antenna LTE-A codebook of which the order is 8; and selecting subsets of column vectors from high-order code words according to a sequence that the order is arranged from high to low so as to generate low-order code words, and performing transmission power. The method not only keeps the backward compatibility of the LTE-A, but also naturally inherits various good properties of the LTE R8 codebook, including nesting, 8-PSK finite character table, a constant module and the like so as to effectively reduce the complexity of CQI calculation and code word selection on user equipment UE side and avoid unbalanced transmission power.

Description

technical field [0001] The present invention relates to the field of multiple input multiple output (Multiple Input Multiple Output) wireless communication systems, in particular to an eight-antenna codebook design method based on the LTE-Advanced system. Background technique [0002] MIMO technology based on limited feedback has attracted much attention in both academia and industry. It has not only become a basic component of many communication standards (such as 3GPP LTE), but also a key technology to meet the requirements of LTE-Advanced systems. Reference 1 "TR 36.814v1.0.0, Further Advancements for E-UTRA Physical Layer Aspects" pointed out that the LTE-Advanced system's downlink peak rate should reach 1Gbps, and the spectrum utilization rate should be 30bps / Hz. Through the carrier aggregation technology, the transmission bandwidth is increased to 100MHz, and the combined use of 4-layer MIMO spatial multiplexing technology can achieve the peak rate requirement of 1Gbps...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06
Inventor 金鑫田霖吴志龙孙刚李玉凤石晶林
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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