Application of interference cancellation in CDMA network
Jianhua Sun · Information technology newsletter · 2012
The MAI(Multiple Access Interference) impacts the forward and reverse link capacity in CDMA network.In order to reduce the impact of MAI,the resource and mechanism of MAI are analyzed,MUD(Multiple User Detection) and interference cancellation technology are introduced to detect the interfering signal from all other users or other sectors,to cancel interfering signal and recover useful signal,therefore to improve the signal SNR and the system capacity.QLIC(Quasi-Linear Interference Cancellation) and RLIC(Reverse Link Interference Cancellation) are two main interference cancellation technologies applied in CDMA network.The theory and the capacity gain of QLIC and RLIC is introduced and derived,the capacity gain applied in CDMA network is calculated.QLIC and RLIC are the important technology methods to improve the capacity of CDMA network,the CDMA service provider can use QLIC and RLIC to upgrade and deploy the network.