LTE uplink MIMO receiver with low complexity interference cancellation

Date
2012-11-01
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract

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.

Description
Advisor
Degree
Type
Journal article
Keywords
LTE/LTE-A uplink, Interference cancellation, SC-FDMA, FPGA
Citation

B. Yin and J. R. Cavallaro, "LTE uplink MIMO receiver with low complexity interference cancellation," Springer Analog Integrated Circuits and Signal Processing, vol. 73, no. 2, 2012.

Has part(s)
Forms part of
Rights
Link to license
Citable link to this page