Channel long-range forecast method based on slope correction

Abstract

The invention discloses a channel long-term prediction method based on gradient correction, which comprises the following steps of: (1) conducting short-term prediction to a channel and recording the channel gain during the short-term prediction of the channel; (2) utilizing strong association of the channel sending frames in coherence time and utilizing short-term prediction algorithm to conduct rough long-term prediction to the channel; and (3) correcting the prediction results obtained from step (2) in accordance with the gradient correction method. By correcting the long-term prediction of the channel, the method leads the long-term prediction value to conform to the real channel better without obvious hysteresis phenomenon. The method can significantly improve the precision of direction application of short-term prediction to the long-term prediction and can be used for the long-term prediction of the channel of a wideband wireless communication system with a sub-packet transmission mode (such as OFDM, SC-FDE, etc.). When the correction is not carried out, long-term prediction still has a correct trend but can not conform to the real channel well and has obvious hysteresis phenomenon.

Description

technical field [0001] The invention relates to a broadband digital communication transmission method and belongs to the technical field of broadband wireless communication. Background technique [0002] With the development of Internet and multimedia services, the requirements for wireless mobile communication systems to provide broadband high-speed data transmission services are getting higher and higher. Since the available frequency resources are very limited, and because wireless communication systems are generally subject to strict power constraints, increasing the data transmission rate can only rely on the development of new technologies with higher spectral efficiency. Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) and Single Carrier Frequency Domain Equalization (hereinafter referred to as SC-FDE) are increasingly popular due to their advantages of high data transmission rate and high spectrum utilization More and more attention. [...

AI Technical Summary

Problems solved by technology

[0070] The present invention aims at the problem of low precision existing in existing long-term channel prediction methods, and provides a long-term channel prediction method based on slope correction, which can significantly improve the accuracy of short-term prediction directly used for long-term prediction, and can be used in block transmission methods (such as OFDM , SC-FDE, etc.) long-term channel prediction for broadband wireless communication systems

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