Turbo code decoding device and method

Abstract

Embodiments of the present invention provide a Turbo code decoding device and method. The Turbo code decoding device includes: an interleaving address calculation module, implemented with a digital circuit, to calculate the interleaved address and process a de-interleaved address; a soft input and soft output decoding module, implemented with an analog circuit, for calculating the soft information of the data packet, and Perform loop iterations to generate decoding results; the interleaver and deinterleaver interleave and deinterleave the soft information with the interleaving address and the deinterleaving address, so as to perform loop iterations with the soft information; the judgment module judges the decoding results to generate a judgment Result data; and, a data output module, outputting the decision result data. Through the Turbo code decoding device and method according to the embodiments of the present invention, the advantages of both digital circuits and analog circuits can be combined to realize high-speed Turbo code decoding, which reduces the decoding time and improves data throughput, thereby improving the Decoding performance of Turbo codes.

Description

technical field [0001] The invention relates to a turbo code decoding device and method. Background technique [0002] As an excellent channel coding method, Turbo code has been applied to many mobile communication standards. The high-speed turbo code decoding technology has become a core technology in the LTE / 4G system, which is used to achieve the 100Mbps data throughput of the LTE system. However, the high-speed turbo code decoding scheme is also a difficult point in the industry. [0003] Present Turbo code decoding device mainly has two kinds of realization modes, and the first kind is pure ASIC (application-specific integrated circuit) realization mode, as the Turbo code decoding device of TurboBest company, and its market share reaches more than 60%; The first is DSP (digital signal processing) implementation, such as Tensilica's Turbo code decoding device, which is widely used in 3G and previous communication systems with lower data throughput. [0004] figure 1 i...

AI Technical Summary

Problems solved by technology

However, in the decoding process of the Turbo code decoding device implemented by DSP, the calculation efficiency of parameters such as branch transition probability Gamma, state metric values ​​Alpha, Beta, and logarithmic likelihood ratio LLR is low, resulting in a large decoding delay. , the data throughput is low, which cannot meet the high data throughput of the LTE / 4G system, and the power consumption is large

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