Processing method of mimo‑ofdm system downlink information data

Abstract

The invention discloses a processing method of MIMO-OFDM system downlink information data. The problem that the optimum error rate performance cannot be obtained through a traditional downlink information data processing method is mainly solved. The processing method comprises the steps that (1) sub-carriers are subjected to grouping, and sending and receiving signal vectors corresponding to the groups of sub-carries and channel matrixes are established; (2) modulating signals corresponding to the groups of sub-carries are subjected to normalization and disturbance; (3) the signal vectors after normalization and disturbance are subjected to multithread interference rejection and emitting power control; (4) the receiving signal vectors corresponding to the groups of sub-carriers are subjected to gain compensation and modulus operation; (5) normalization modulating signal estimated values obtained after modulus operation are subjected to inverse normalization; and (6) estimated values of orthogonality amplitude modulating signal vectors after inverse normalization are subjected to demodulation. The method has the advantages of being low in error rate and adjustable in complexity, and the method is used for transceiver designing of an MIMO-OFDM communication system.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a data processing method, which can be used for processing transmitting end information and receiving end information data in the downlink of MIMO-OFDM system. Background technique [0002] Multiple-input multiple-output-orthogonal frequency division multiplexing MIMO-OFDM technology has been adopted by the fourth-generation 4G mobile communication standard. It has excellent performances such as high spectrum utilization, stable signal transmission, and fast transmission rate, and is considered to be the future One of the core technologies of the mobile communication system, the communication system using this technology is collectively referred to as the MIMO-OFDM system. One of the key technologies of the MIMO-OFDM system is the processing technology of downlink information data. By preprocessing the transmitted information data at the transmitting end and post-processing t...

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Problems solved by technology

Under the condition of no inter-carrier interference, the above conclusion is valid for traditional downlink information data processing methods, such as: zero-forcing ZF, minimum mean square error MMSE, Tomlinson-Harashima, but for vector perturbation preprocessing, this conclusion is no longer set up

Therefore, simply extending the vector perturbation processing method to each subcarrier of the MIMO-OFDM system cannot achieve the optimal performance of the bit error rate of the system

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