In LTE/LTE-A uplink receiver, frequencydomain equalizers (FDE) are adopted to achieve goodperformance. However, in multi-tap channels, the residualinter-symbol and inter-antenna interference still exist afterFDE and degrade the performance. Conventional interferencecancellation schemes can minimize this interferenceby using frequency domain interference cancellation.However, those schemes have high complexity and largefeedback latency, especially when adopting a large numberof iterations. These result in low throughput and require alarge amount of resource in software defined radio implementation.In this paper, we propose a novel low complexityinterference cancellation scheme to minimize theresidual interference in LTE/LTE-A uplink. Our proposedscheme can bring about 2 dB gains in different channels,but only adds up to 7.2 % complexity to the receiver. Thescheme is further implemented on Xilinx FPGA. Comparedto other conventional interference cancellation schemes,our scheme has less complexity, less data to store, andshorter feedback latency.
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