Successive interference cancellation method and apparatus and detection method and apparatus using successive interference cancellation

摘要

A successive interference cancellation method includes: determining whether a current interfering user channel is a service cell channel of a service cell or a neighbor cell channel of a neighbor cell; correcting a phase rotation of a user signal of the neighbor channel when the interfering user channel is the neighbor cell channel; determining a tentative ruling for a user signal of the neighbor cell channel; restoring the phase rotation of the user signal of the neighbor cell channel; performing a signal reconstruction on the neighbor cell channel to obtain a reconstructed signal of the neighbor cell channel; removing the reconstructed signal of the neighbor cell channel from a reception signal to obtain a corrected signal, and completing successive interference cancellation on the current interfering user channel. With the above successive interference cancellation method, accuracy of successive interference cancellation as well as system detection performance is enhanced.

主权项

1. A successive interference cancellation method, comprising:
determining whether a current interfering user channel is a service cell channel or a neighbor cell channel; correcting a phase rotation of a user signal of the neighbor cell channel when the interfering user channel is the neighbor cell channel, wherein the user signal is obtained from a spreading code and a convolution of a channel estimation of a neighbor cell user; determining a tentative ruling for the user signal of the neighbor cell channel after correcting the phase rotation of the user signal of the neighbor cell channel; restoring the phase rotation of the user signal of the neighbor cell channel after determining the tentative ruling for the user signal of the neighbor cell channel; performing a signal reconstruction on the neighbor cell channel to obtain a reconstructed signal of the neighbor cell channel after restoring phase rotation of the user signal of the neighbor cell channel; and removing the reconstructed signal of the neighbor cell channel from a reception signal, and completing successive interference cancellation on the current interfering user channel, wherein the reception signal is obtained from a first spreading code and a first convolution of a first channel estimation and a second spreading code and a second convolution of a second channel estimation of the neighbor cell user and a service cell user, respectively.