Method for encoding mixed automatic retransmission channel

Abstract

The present invention relates to a method for coding the hybrid automatic repeat request channel. The method comprises the steps of executing code block dividing to the inputted transmission block according to the maximum allowed coding block of the coder; adding CRC bit to each sub-transmission-block generated after dividing; executing channel encoding to each newly generated sub-transmission-block; executing code rate matching to each subcode stream generated after coding; combining or cascading each subcode stream after code rate matching; executing channel interweaving to the combined or cascaded code stream; mapping the base band of the binary system bit stream after channel interweaving to the planisphere under corresponding modulation mode or orthogonally modulating to the carrier wave; and mapping the modulation symbol to the resource of physical channel. This method increases the performance of chain circuit through making that the coding block has enough diversity gain by configuring the code block cascading before the channel interweaving, and furthermore makes that the transmission has good enough error detection capability and the retransmission time of the coding block is reduced by configuring the CRC bit adding after the code block dividing.

Description

technical field [0001] The invention relates to hybrid automatic request HARQ and wireless baseband processing, in particular to a HARQ wireless system signal processing method. Background technique [0002] (1) The cellular concept proposed by Bell Laboratories in the United States in the early 1970s led to the rapid development of mobile communications, which can be roughly divided into the following stages: [0003] The first-generation mobile communication system adopted the FDMA analog modulation method of frequency division multiple access. [0004] The second-generation cellular system adopts the digital modulation methods of time division multiple access TDMA and code division multiple access CDMA, which improves the system capacity, and adopts the mode of independent channel transmission signaling, which greatly improves the system performance. It mainly includes GSM in Northern Europe and IS-95 in North America. [0005] The third-generation mobile communication ...

AI Technical Summary

Problems solved by technology

Due to the application of MIMO technology and its Precoding technology, the centralized Localized carrier allocation strategy will become the mainstream strategy. This method of placing channel interleaving before code block concatenation will lead to insufficient frequency diversity for code blocks, which will be obvious degrade link performance

[0032] ②The channel coding chains of WCDMA, TDSCDMA and LTE propose to put CRC processing outside the code block segmentation, and at this time, there will be a disadvantage that the error detection performance is not good enough, because when the transmission block is very large, the 24-bit CRC error detection cannot guarantee enough good error detection performance

In addition, if an error occurs in any code block of the burst, all the code blocks of the burst need to be retransmitted, which reduces the transmission efficiency.

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