Method and device for processing baseband data

Abstract

The invention discloses a method and device for processing baseband data. The method comprises the steps of: calculating a scamble of the baseband data, storing the baseband base and the scamble corresponding to the baseband data in an interleaving matrix and calculating a normalizing factor required by demodulating the baseband data; and after storing the data of the interleaving matrix, sequentially deinterleaving, demodulating and descrambling the interleaving matrix, wherein the demodulation is carried out by adopting the normalizing factor, and the descrambling is carried out by adopting the scamble corresponding to the baseband data, which is stored in the interleaving matrix. According to the invention, through regulating the sequence of demodulation, descrambling and deinterleaving, the statistic range of the normalizing factor A and the noise estimation is enlarged, demodulation performance is improved and processing delay is not added.

Description

technical field [0001] The present invention relates to an LTE (Long Term Evolution, long-term evolution) system, in particular to a baseband data processing method and device. Background technique [0002] The protocol of the LTE system stipulates the order of the bit-level processing of the uplink transmitter. In order to maintain consistency, the corresponding baseband data processing technology is used at the receiving end to ensure the correct output of the signal. Such as figure 1 As shown, the protocol stipulates that the LTE transmitting end adopts interleaving, scrambling and modulation technologies at the bit level. Therefore, correspondingly, the receiving end performs processing in the order of demodulation, descrambling and deinterleaving. [0003] LTE introduces two high-order modulation methods, 16QAM (Quadrature Amplitude Modulation) and 64QAM. In the corresponding 16QAM and 64QAM demodulation methods, a statistical normalization factor A is required. Moreov...

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Problems solved by technology

[0004] However, in order to achieve a more ideal result, it is necessary to count all the data, and then calculate the normalization factor A and estimate the noise. Correspondingly, the demodulation process must wait until all the data is received, which will increase the processing time. Delay. Therefore, in order to achieve a balance between delay and performance, some statistical methods can be used to obtain the normalization factor A and noise estimation. For example, the normalization factor A and noise estimation can be obtained by statistics corresponding to the reference symbols. Smaller processing delays are guaranteed at the expense of smaller performance losses, however, it is difficult to achieve an ideal balance, usually resulting in poor signal processing performance

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