Cellular and v2v mixed large-scale mimo pilot multiplexing channel acquisition method

Abstract

The present invention proposes a cellular and V2V hybrid massive MIMO pilot multiplexing channel acquisition method, and the pilot signals used by the cellular users and V2V-Tx communicating on the same time-frequency resource can be multiplexed. First, the base station and each V2V‑Rx obtain the statistical channel information of each user according to the received probe signal and send it to the central control unit. Feedback the results to the base station and each V2V‑Rx. Next, the base station uses the received pilot signal to obtain the channel estimation and channel estimation error statistics of the cellular user; each V2V-Rx uses the received pilot signal to obtain the channel estimation and channel estimation error statistics of the V2V-Tx in the same communication pair information. During the movement of each user, the joint pilot frequency allocation is dynamically implemented with the change of the channel statistical characteristics. The invention can greatly reduce the pilot frequency overhead of the system and improve the spectrum efficiency of the wireless communication system.

Description

technical field [0001] The invention relates to a cellular and V2V hybrid massive MIMO wireless communication method, in particular to a cellular and V2V hybrid massive MIMO pilot multiplexing channel acquisition method. Background technique [0002] In recent years, vehicle-to-vehicle (V2V) and vehicle-to-network (V2N) communications have achieved rapid development. In order to meet the requirements of future V2V communication applications, it is necessary to deeply mine and utilize space wireless resources to greatly improve the spectrum utilization and power utilization of V2V wireless communication. Therefore, introducing the massive MIMO system into V2V communication becomes a very potential solution. Configuring a large-scale antenna array (more than dozens) at the vehicle receiving end to deeply mine and utilize spatial dimension resources has become one of the development trends of V2V wireless communication in the future. [0003] In practical wireless communicati...

AI Technical Summary

Problems solved by technology

However, in the V2V and V2N scenarios, due to the high-speed movement of vehicle users, the V2V / V2N channel fades quickly, and with the access of a large number of cellular users and vehicle users, the pilot overhead shows an exponential increase, which in turn leads to the spectrum degradation of the wireless communication system. Significant reduction in efficiency and power efficiency has become a bottleneck in system construction

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