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Codebook design method, communication device and codebook training method

A technology of design method and training method, which is applied in the direction of code conversion, error prevention/detection using return channel, digital transmission system, etc., which can solve the problem of non-codebook design, large buffer space and large distortion, and ineffective generation of codebook cache issues such as device/memory space, to achieve the effect of improving efficiency

Inactive Publication Date: 2017-12-29
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional Lloyd algorithm or some improved Lloyd algorithms, there is a problem that the codebook cannot be generated efficiently or additional buffer / memory space needs to be implemented
Applying this algorithm to achieve maximum mutual information vector quantization requires large additional buffer space and may introduce large distortion, it is not an efficient codebook design

Method used

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  • Codebook design method, communication device and codebook training method
  • Codebook design method, communication device and codebook training method
  • Codebook design method, communication device and codebook training method

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Embodiment Construction

[0035] Figure 1A It shows the functional modules of the user equipment according to the embodiment of the present invention. The functional modules reside in the receiver 100 of the user equipment to process radio frequency (radio frequency, RF) signals. A digital front-end (Digital Frontend, DFE) module 101 receives and processes an RF signal from an antenna 110 . The output of the digital front-end module 101 is fed back to an inverse fast Fourier transform (Inverse Fast Fourier Transform, IFFT) module 102 . The IFFT module 102 removes the cyclic prefix and transforms the data from the frequency domain to the time domain. The converted data enters a symbol de-mapper (SB-MAP) module 103 , and the symbol de-mapper module 103 demaps received transmission symbols to obtain a bit stream. In a channel de-interleaver (DE-INTLV) module 104 , the bit stream is de-interleaved and fed back to a Turbo MIMO combiner 105 and a HARQ buffer 106 . The HARQ log likelihood ratio data is st...

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Abstract

The present invention provides a codebook design method, a communication device and a codebook training method, wherein the codebook design method includes: obtaining distribution information from a group of source data vectors according to a predetermined codebook subset design; The codebook length L and the distribution information determine the number of codewords Ns for each codebook subset; divide each source data vector into the corresponding codebook subset; train the source data vector in the codebook subset; and Default codebook vector values ​​are assigned to codebook subsets that have no source data vectors. Using the technical solution provided by the invention can make the codebook search more efficient.

Description

technical field [0001] The present invention relates to mobile communication networks, and, in particular, to a hybrid automatic repeat request (HARQ) buffer reduction scheme based on simplified maximum mutual information (maximum mutual information, MMI) vector quantization (Vector Quantization, VQ). Background technique [0002] The Long Term Evolution (LTE) system is a modern mobile communication standard that has been designed to provide seamless Internet between User Equipment (UE) and Packet Data Network (PDN) Protocol (IP) connection. HARQ is used in the long-term evolution system to ensure the reliability of transmission and improve the throughput of the channel. HARQ is a stop-and-wait transmission scheme in which, at the transmitting end, subsequent transmissions cannot occur until ACK / NACK is received from the receiving entity. At the receiving end, the received information is temporarily stored in the HARQ memory. If a received message is not correctly decoded...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/18
CPCH03M7/3082
Inventor 李俊强
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE
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