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A prediction method and predictor technology, applied to the shaping network, transmission system, electrical components, etc. System performance, effect of improving decoding performance
Active Publication Date: 2013-07-03
ZTE CORP
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[0004] However, it is noted that when the channel decoder of the existing Turbo equalizer is a linear convolutional code, there is no prior knowledge about the source bits. During Turbo equalization, the channel decoder cannot fully reflect the Turbo idea, which also affects system performance
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Embodiment 2
[0254] This embodiment provides an inter-frame correlation prediction method in channel decoding that can be the same as Embodiment 1, such as Figure 4 shown, including:
[0255] Step 210, according to the channel decoding results of the current frame and the previous frame, determine the value of the changed bit of the current frame;
[0256] In this step, the change bits of each source bit of this frame can be calculated according to the following formula according to the source bits obtained by channel decoding of this frame and the previous frame:
[0257] c k，q =xor(u k，q , u k-1，q )
[0258] Among them, c k，q is the qth changed bit in the kth frame, xor(x, y) is the XOR of bits x, y, u k，q , u k-1，q are the qth bit in the source bits of the kth frame and the k-1th frame, respectively.
[0259] above c k，q The simplified algorithm only needs to provide u k，q That is, the hard judgment result can greatly simplify the complexity of the channel decoder.
[0260] In...
Embodiment 3
[0281] This embodiment provides an intra-frame correlation prediction method in channel decoding, which may be the same as Embodiment 1, wherein, when performing channel decoding on a frame of data, each iteration calculates the prior soft information of the relevant bit pairs in the following manner :
[0282] Step 310, performing a weighted operation on the historical value and current value of the array recording the number of occurrences of each value combination of the relevant bit pair to obtain the value of the array in this iteration, wherein the current value of the array is decoded according to the channel The soft information of the relevant bit pair output by the device in this iteration is determined, and the historical value of the array is the value of the array obtained in the previous iteration.
[0283] Assuming (a, b) constitutes a relevant bit pair, there are four combinations of their values, respectively s0=(0,0), s1=(0,1), s2=(1,0), s3 =(1,1). Use s_ar...
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Abstract
The invention relates to a Turbo balancing, inter-frame, intra-frame relevant prediction method and a Turbo balancing, inter-frame, intro-frame relevant prediction device. The Turbo balancing method includes the following steps. Channel decoding is performed according to balanced soft information after de-interleaver, soft information of information source bit and soft information of an information channel coding output bit sequence are output. When channel decoding is performed, prior knowledge, obtained by inter-frame relevant prediction, of a frame information source bit is used for decoding operation, namely addition or reduction, in the first iteration. Apart from the first iteration, prior knowledge, obtained by intra-frame relevant prediction, of a frame information source bit is used for decoding operation in other iterations. The invention further discloses an inter-frame relevant prediction method, an intra-frame relevant prediction method in the channel decoding and a corresponding intra-frame relevant prediction device and an intra-frame relevant prediction device. The scheme modifies the inter-frame relevant prediction method and the intra-frame relevant prediction method and uses the inter-frame relevant prediction method and the intra-frame relevant prediction method for balancing Turbo, and decoding performance of the channel decoder is improved.
Description
technical field [0001] The present invention relates to a wirelesscommunication reception, in particular to a method and device for Turbo equalization and its inter-frame and intra-frame correlation prediction. Background technique [0002] Wireless signals often suffer from multipath fading during transmission. At this time, in order to estimate the transmitted signal, it is necessary to use an equalizer to perform an equalization operation to compensate for inter-symbol interference caused by multipath transmission. Usually the equalizer only uses the received signal and thinks that the transmitted symbols are equally distributed in the transmitted symbol set. If the prior probability of the transmitted symbol that is closest to the transmission process can be obtained at this time, the posterior probability can be fully utilized in the equalizer. The probability maximization method obtains the posterior probability of the transmitted bit sequence, and converts the poster...
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