Work in progress: Exploiting charrelation matrix to improve blind separation performance in DS-CDMA systems

Second-Order Cone Programming Based Robust Blind Multiuser Detector for CDMA Systems

“…The main application of ICA is blind separation problem, which has become an appealing field of research in statistical signal processing related communications [1,24]. The increasing interest in ICA is mainly due to emerging new practical application areas, where the assumption of independence is both powerful and realistic, which making it possible to find meaningful source signals or independent component from the data to be analyzed in a completely blind manner [16][17][18].…”

“…The third type of blind multiuser detectors is the ICA based BSS detection, which is also referred to as ICA-based receivers [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The higher-order statistic (HOS) based ICA algorithms are used to deal with BSS of unknown sources from a mixed-up received signal.…”

“…For ICA-based blind detectors, two major problems are investigated by many researchers, i.e. external interference cancellation problem and internal interference cancellation problem [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In the external interference cancellation problem, the CDMA signal and external interference signal are mutual independence, which is modeled as ICA model based on two-sensor array [10][11][12][13][14].…”

“…For example, the work is in [10][11][12][13][14]. In view of the internal interference cancellation problem, the structure of the CDMA channel where all the users transmit their data poses a similarity to the BSS problem and prompts the use of ICA in this scenario [15][16][17][18][19][20][21][22][23][24][25][26]. Then the blind separation work can be carried out so that each user signal can be separated from the mixed signals.…”

“…Then the blind separation work can be carried out so that each user signal can be separated from the mixed signals. For example, the related works are shown in literature [15][16][17][18][19][20][21][22][23][24][25][26].…”