Processing method of MIMO-OFDM system downlink information data

A technology of MIMO-OFDM and information data, applied in the direction of multi-frequency code system, etc.

Active Publication Date: 2014-07-16
广州广哈通信股份有限公司
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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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  • Processing method of MIMO-OFDM system downlink information data
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  • Processing method of MIMO-OFDM system downlink information data

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Embodiment Construction

[0050] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.

[0051] refer to figure 1 , the system used in the present invention is a MIMO-OFDM system, which consists of a sending end and a receiving end. Wherein, the transmitter is equipped with B antennas and uses N subcarriers to send information data, and K receivers are equipped with R antennas and R≤B. The present invention assumes that on each subcarrier, the wireless channel H between the transmitter antenna and the receiver antenna n , 1≤n≤N are flat fading channels. Moreover, each channel is independent of each other.

[0052] refer to figure 2 , the implementation steps of the present invention are as follows:

[0053] Step 1, group subcarriers.

[0054] The sending end divides N subcarriers into M groups, and each group contains Q subcarriers with different frequencies. The set I={1,2,...,N} represents the first to Nth subcarr...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 陈睿蔡雪莲李长乐董全张阳李建东
Owner 广州广哈通信股份有限公司
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