In LTE/LTE-A uplink receiver, frequency
domain equalizers (FDE) are adopted to achieve good
performance. However, in multi-tap channels, the residual
inter-symbol and inter-antenna interference still exist after
FDE and degrade the performance. Conventional interference
cancellation schemes can minimize this interference
by using frequency domain interference cancellation.
However, those schemes have high complexity and large
feedback latency, especially when adopting a large number
of iterations. These result in low throughput and require a
large amount of resource in software defined radio implementation.
In this paper, we propose a novel low complexity
interference cancellation scheme to minimize the
residual interference in LTE/LTE-A uplink. Our proposed
scheme can bring about 2 dB gains in different channels,
but only adds up to 7.2 % complexity to the receiver. The
scheme is further implemented on Xilinx FPGA. Compared
to other conventional interference cancellation schemes,
our scheme has less complexity, less data to store, and
shorter feedback latency.Renesas MobileTexas IntrumentsXilinxSamsungHuaweiNational Science Foundation (NSF
