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Method and device for constructing codebook and method and device for constructing precoding matrix

A codebook and decoding technology, which is applied in the field of building precoding matrix, can solve the problems of large feedback overhead and achieve good scalability and accuracy

Active Publication Date: 2019-09-17
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These three aspects of channel quantization will cause large feedback overhead in distributed massive MIMO systems when the number of cooperating transmit nodes is large

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  • Method and device for constructing codebook and method and device for constructing precoding matrix
  • Method and device for constructing codebook and method and device for constructing precoding matrix
  • Method and device for constructing codebook and method and device for constructing precoding matrix

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Embodiment Construction

[0042] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0043] figure 1 The context of a feedback system 100 for a MIMO communication system in which embodiments of the invention may be implemented is shown. Such as figure 1 As shown, the feedback system 100 includes a feedback transmitter 110 located at the mobile terminal side and a feedback receiver 120 located at the base station side or the transmitting end side. The feedback transmitter 110 includes a trellis decoder 111 and a channel en...

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Abstract

The embodiment of the invention provides a method and device for building a codebook at a mobile terminal, and a method and device for building a precoding matrix at a base station. The method for building the codebook comprises the steps: obtaining the channel information of channels between the mobile terminal and a plurality of transmission nodes; quantifying the directions and amplitudes of channels through the coding of channel information application grids, so as to respectively select a first optimal code word and a second optimal code word from a first codebook and a second codebook, which are generated in advanced, for each of a plurality transmission nodes; carrying out the cascading of the first and second optimal code words for each transmission node, so as to build a first cascading codebook and a second cascading codebook, wherein the combination of the first and second cascading codebooks will be used for the joint transmission of the plurality of transmission nodes. According to the scheme of the embodiment, the method is good in expandability and accuracy.

Description

technical field [0001] Embodiments of the present invention generally relate to wireless communication technologies, and more specifically, relate to a method and device for constructing a codebook and a method and device for constructing a precoding matrix in a mobile terminal. Background technique [0002] A multiple-input multiple-output (MIMO) system refers to a communication system in which signals are independently transmitted by multiple antennas on the base station side, and signals are received by multiple antennas on the terminal side. In recent years, in order to obtain higher channel capacity and lower energy consumption, etc., a large number of antennas, such as 64 or 128, are usually configured at the base station of the MIMO system, thus forming a massive MIMO system (Massive MIMO) . When deploying a large number of antennas on the base station side, a centralized architecture and a distributed architecture may be adopted, thereby respectively forming a centr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L25/02H04B7/0413
Inventor 佘锋刘皓
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD