Correlation rotation precoding method applied to GFDM communication system

Abstract

The invention discloses a correlation rotation precoding method applied to a GFDM communication system. The problem of relatively low symbol error rate transmission performance of a generalized frequency division multiplexing GFDM communication system in the prior art is mainly solved. The related rotation precoding method comprises the following specific steps: (1) constructing an autocorrelation matrix; (2) constructing a zero forcing precoding matrix; (3) constructing a correlation rotation matrix; (4) eliminating a multiplicative channel fading factor; (5) constructing a correlation rotation precoding matrix; (6) precoding; and (7) transmitting a to-be-transmitted symbol. The correlation rotation precoding method disclosed by the invention has the advantages of high symbol error rate performance, adverse effects caused by self-interference and multi-path channel interference can be simultaneously eliminated, the interference is utilized to improve the symbol error rate transmission performance of the generalized frequency division multiplexing GFDM communication system, meanwhile the precoding processing method of signals is simple and feasible, and the signal transmission requirements of users in a real environment can be satisfied in a multi-path channel scene.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a correlation rotation precoding method applied to a generalized frequency division multiplexing (GFDM) communication system in the technical field of multi-carrier transmission. The invention realizes the utilization of interference by obtaining an equivalent channel matrix formed by a generalized frequency division multiplexing GFDM communication system matrix and a multi-channel channel matrix, and performing phase rotation processing on its autocorrelation matrix. It can be used to improve the symbol error rate performance of generalized frequency division multiplexing GFDM communication system. Background technique [0002] Compared with the widely used OFDM (orthogonal frequency division multiplexing) communication system transmission technology nowadays, the generalized frequency division multiplexing GFDM communication system transmission technology adopts non...

AI Technical Summary

Problems solved by technology

However, this method still has disadvantages: first, the zero-forcing detection method may produce noise amplification effect, which reduces the performance of the system bit error rate; interference, reducing the bit error rate performance of the system

However, the disadvantage of this method is that this method only eliminates system self-interference in Gaussian channels, and is not suitable for multi-path channels in real environments.

However, these three methods still have disadvantages: First, in addition to precoding at the transmitting end of the GFDM system, matching at the receiving end is also required, which is relatively complicated to implement and may cause noise amplification effects , to reduce the bit error rate performance of the system; secondly, these three methods deal with interference by means of offsetting, and the improvement of the bit error rate performance is limited

Images