Title :
An Adaptive Blind Single Antenna Interference Cancellation Algorithm for 4G LTE Systems
Author :
Zhou, Zhenyu ; Jiang, Yi ; Tariq, Muhammad ; Li, Yanwei ; Sato, Takuro
Author_Institution :
Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Beijing, China
Abstract :
In previous works, a blind single antenna interference cancellation (SAIC) algorithm named least mean square-blind joint maximum likelihood sequence estimation (LMS-BJMLSE) has been proposed for OFDM systems. It is blind with respect to interference and is able to cancel interference by only one receive antenna. However, LMS-BJMLSE requires a long training sequence (TS) for channel estimation, which greatly reduces the transmission efficiency. Furthermore, since TS is not available in 4G LTE systems, LMS-BJMLSE can not be applied directly. In this paper, in order to solve this problem, a SINR and symbol position weight adaptive algorithm is proposed, and named as adaptive LMS-BJMLSE (ALMS-BJMLSE). For each slot, ALMS-BJMLSE dynamically decides the number of antennas used for interference cancellation and adjusts the step size, based on estimated SINR conditions and symbol position weight. Simulation results demonstrate that ALMS-BJMLSE achieves a much better balance between performance and transmission efficiency compared to the conventional LMS-BJMLSE algorithm, and can be applied for 4G LTE systems.
Keywords :
4G mobile communication; Long Term Evolution; OFDM modulation; channel estimation; interference suppression; maximum likelihood sequence estimation; radiofrequency interference; receiving antennas; 4G LTE systems; ALMS-BJMLSE; OFDM systems; SAIC algorithm; SINR conditions; adaptive LMS-BJMLSE; adaptive blind single antenna interference cancellation algorithm; channel estimation; least mean square-blind joint maximum likelihood sequence estimation; receiving antenna; symbol position weight; symbol position weight adaptive algorithm; training sequence; transmission efficiency; Bit error rate; Channel estimation; Diversity reception; Interference; Joints; Receivers; Signal to noise ratio; ALMS-BJMLSE; LTE; OFDM; co-channel interference cancellation; receiver diversity; single antenna interference cancellation;
Conference_Titel :
High Performance Computing and Communication & 2012 IEEE 9th International Conference on Embedded Software and Systems (HPCC-ICESS), 2012 IEEE 14th International Conference on
Conference_Location :
Liverpool
Print_ISBN :
978-1-4673-2164-8
DOI :
10.1109/HPCC.2012.170