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Encoding/decoding method and device for orthogonal repeated accumulate codes

A technology of repeated accumulation, encoding and decoding, which is applied in the direction of digital transmission system, electrical components, and error prevention, etc., can solve the problems of decoding performance degradation, processing overhead and processing delay increase, etc., to improve system decoding performance, reduce Effect of processing overhead and reducing processing delay

Inactive Publication Date: 2011-07-27
西安新邮通信设备有限公司
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Problems solved by technology

[0007] In order to overcome the disadvantages of existing technologies such as the degradation of decoding performance and the increase of system processing overhead and processing delay under the condition of severe multipath fading, the present invention provides a simple The encoding and decoding method and device of Orthogonal Repeat Accumulate (ORA) codes provide stable and reliable data transmission services for high-speed mobile and cell edge users

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  • Encoding/decoding method and device for orthogonal repeated accumulate codes
  • Encoding/decoding method and device for orthogonal repeated accumulate codes
  • Encoding/decoding method and device for orthogonal repeated accumulate codes

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Embodiment Construction

[0034] like figure 2 Shown in the dotted frame, the coding method of the ORA code of the embodiment of the present invention comprises:

[0035] Step S1: Perform repetitive encoding on the input bit information, including code block segmentation, CRC check, Turbo encoding, rate matching and code block concatenation processing sub-processes, wherein repetitive encoding is mainly completed in rate matching. Suppose the input bit of the current TB is b 0 , b 1 , b 2 , b 3 ,...,b B-1 , when B>Z max =6144, then carry out the code block segmentation according to the rules defined in the specification, and obtain C CBs as: Perform CRC check, Turbo encoding, and rate matching for each CB until all CBs complete the above operations. Then the code blocks are concatenated to sequentially concatenate the output of each CB transmission buffer to obtain the sequence E

[0036] where, the rate matching, such as Figure 4 shown, including the following sub-steps:

[0037] Step S...

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Abstract

The invention discloses an encoding / decoding method and device for orthogonal repeated accumulate codes. In encoding, a repeatedly encoding submodule conducts code block segmentation, CRC (cyclic redundancy check), Turbo encoding and code block cascade to input TB bit information so as to obtain a repeated encoding bit sequence; the repeated encoding bit sequence is multiplexed with control information and then interleaved by a channel and processed by a modulation submodule for orthogonal accumulate encoding; further, the information is subjected to transmission precoding / RE mapping, and CP adding on IFFT, and then is transmitted; in decoding, the accumulative relationship of all codes in a receiving estimating sequence is relieved; then a modulation code estimating sequence is subjected to flexible modulation and channel de-interleaving in sequence, the processed information is sent to a repeated decoding submodule; and code block segmentation, dissociation rate matching, Turbo decoding, CRC decoding and code block cascade are conducted in sequence to complete decoding. The encoding / decoding method and device can effectively improve the system decoding performance in a serious multipath fading condition, and reduce the processing cost of the system and the processing time delay.

Description

technical field [0001] The present invention relates to the communication field, in particular to a coding and decoding method and device. Background technique [0002] In broadband wireless communication systems, in order to meet the requirements of high-speed and reliable data transmission, it is necessary to provide a large system bandwidth under the premise of ensuring efficient power. However, for users with poor channel conditions, allocating a larger bandwidth to them often means a sudden drop in the utilization rate of the system frequency band, resulting in a decrease in system throughput. In response to this phenomenon, based on the principle of channel capacity maximization and fairness, 3GPP LTE chooses to allocate less bandwidth for this type of users, and at the same time uses repetition coding as a transmission scheme supplemented by channel coding. figure 1 The 3GPP LTE uplink UL-SCH processing flow is given, assuming that in the current transmission time in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 袁伟何勃赵彦
Owner 西安新邮通信设备有限公司
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