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In this paper, we address the issue of joint detection schemes for uplink cellular system when base station cooperation is possible for multi-cell users in multi-cell scenario. The ZF and ZF based SIC detection are analyzed and evaluated, however, they need the increased decoder complexity as the number of iteration is increased. We propose a new joint ZF and partial ML decoding scheme, which combines the ZF detection and partial ML decoding scheme in order to improve the detection performance and also decrease the decoder complexity. Simulation results show that the proposed scheme attains the better BER performance and also provide a much reduced decoder complexity The proposed scheme can be applied to the MIMO detection for single user and can be extended to multiuser and multi-antenna based other types of BS Cooperation.