Information interactive combining method in collaboration multi-point receiving

Abstract

The present invention discloses an information alternation combination method in multi-point collaboration receiving, and belongs to the design field of combined receiver in wireless communication. The collaboration point only transmits the bit information and signal-to-noise ratio of hard decision or the signal interference noise ratio after detection or the average value of absolute value of bit likelihood ratio to the master node. The master node firstly reconstructs bit soft information according to the hard decision information of collaboration node, and the signal-to-noise ratio or signal interference noise ratio or the average bit likelihood ratio. Then the soft decision of information is obtained after superposing the soft information itself with the soft information of reconstructed collaboration point. The method can reduce the rate of information alternating between the nodes and can obtain the capability which is better than the selection diversity.

Description

technical field [0001] The invention relates to a method for information interaction and combination in coordinated multi-point reception, which belongs to the design field of joint receivers in wireless communication. Background technique [0002] Coordinated multipoint transmission is a key technology in the long-term evolution of the third generation mobile communication (3GPP LTE). In uplink coordinated multi-point reception, how to effectively exchange soft information among multiple cooperative points is a difficult point. If there is a strong communication link, such as optical fiber, between multiple coordination points, then they can use a more complex joint receiver for joint detection. For example, the multi-point joint reception in the base station in 3GPP LTE may adopt joint detection. However, when the capacity of the communication link between base stations is limited, the rate of information exchanged between them is limited. Especially in the future, the ...

AI Technical Summary

Problems solved by technology

However, when the capacity of the communication link between base stations is limited, the rate of information exchanged between them is limited

Especially in the future, the transmission rate of mobile communication is high, and the original bit data rate of the user is hundreds of megabytes. If the information exchanged between base stations is quantified, it will cause a heavy burden on the backhaul.

Images