A Decoding Method of Wireless Communication System Based on LTE

Abstract

The invention discloses an LTE-based wireless communication system decoding method, which comprises the steps of: (1) establishing a grid diagram; (2) determining an optimal path; (3) and carrying outdecoding and outputting. In the above manner, the LTE-based wireless communication system decoding method eliminates all impossible states by multiple iterations, only an initial state of a tail-biting path that is most similar to a receiving sequence survives, and finally, the initial state is subjected to algorithm convergence to the optimal tail-biting path for output; in addition, a metric value of a maximum likelihood tail-biting path is updated or the impossible initial state from the initial states is eliminated by means of the obtained surviving tail-biting path, algorithm non-convergence caused by a circular trap problem is effectively solved, the dilemma that a tail-biting convolution code does not have a practical optimal coding algorithm is solved, and the LTE-based wireless communication system decoding method has broad market prospect in popularization.

Description

technical field [0001] The present invention relates to the communication field, in particular to an LTE-based wireless communication system decoding method. Background technique [0002] In the LTE wireless communication system, the physical layer involves the encoding and decoding processing of information, among which the tail-biting convolutional code is one of them. The tail-biting convolutional code module is to perform channel coding on control information and broadcast channels to enhance robustness. It overcomes the problem of code rate loss and is suitable for iterative decoding. This method is based on the cyclic Viterbi decoding algorithm. According to the received soft information sequence, the impossible initial states are eliminated one by one through iteration, and finally the optimal bit is found. tail path. The convolutional code encoder of the LTE system adopts the tail-biting encoding method. When the encoder starts to work, special initialization is req...

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Problems solved by technology

[0003] In the wireless communication system, the requirements for the decoding time of the physical layer are relatively strict, so it is necessary to provide a more efficient and reliable decoding scheme, which is optimized for the Bitby algorithm for the tail-biting convolutional code cycle. The existing wireless base station The system is that the decoding scheme does improve the operation speed and reliability, and the bit error rate has been reduced to the minimum, but the time optimization needs further improvement, because according to the cyclic decoding mechanism, the complexity will increase, resulting in too long decoding time the disadvantages of

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