A kind of LTE-based space-frequency block code decoding method and system

Abstract

The invention discloses a space-frequency block code decoding method based on LTE. Data on two receiving antennas are combined so that interference cell information is counteracted, and service cell information is demodulated through further conversion combination. The invention further discloses a space-frequency block code decoding system based on the LTE. The space-frequency block code decoding system comprises a common space-frequency block code decoder arranged on a mobile terminal, an interference signal canceller, a coalescence coefficient calculator and a signal estimator, wherein the common space-frequency block code decoder conducts decoding according to signals received by the mobile terminal, then the decoded signals sequentially passes through the interference signal canceller, the coalescence coefficient calculator and the signal estimator to demodulate out the service cell information. Compared with the prior art, calculating quantity is small, the interference cell information can be rapidly and effectively eliminated, and meanwhile cost of the whole system can be effectively lowered.

Description

technical field [0001] The present invention relates to the field of decoding, in particular to an LTE-based space-frequency block code decoding method and system. Background technique [0002] In a wireless cellular communication system, if the serving cell and the surrounding cells share the same frequency. The mobile terminals in the serving cell will be subject to co-channel interference. like figure 1 As shown, the mobile terminal can simultaneously receive signals from the serving cell and neighboring cells on the same frequency. This co-channel interference will obviously affect the communication quality. LTE is also a kind of wireless cellular communication system, so it will face the same problem. [0003] SFBC (SpaceFrequencyBlockCode, Space Frequency Block Code) is applied in LTE transmit diversity mode. A space-frequency block code is a data pair. It is sent by two transmitting antennas in space, and occupies two adjacent data REs (ResourceElements, resourc...

AI Technical Summary

Problems solved by technology

However, this means that no matter which method, the inversion operation of the 8×8 matrix is ​​unavoidable

As we all know, the complexity of matrix inversion operation grows geometrically with the increase of matrix size

In the LTE system, thousands of space-frequency code blocks can be sent at the same time. If the existing technology is used to solve this problem, thousands of 8×8 matrix inversion operations are required. The huge amount of calculation is unbearable for actual products, and the matrix calculation The inverse operation not only requires a large number of multiplication and addition operations, but also a large number of division operations, and the division operation is a very taboo high-complexity operation in engineering implementation

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