| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 101 === The interference from other cells, which severely degrades the system performance, is a critical factor in modern wireless cellular communication systems and should be carefully managed. To tackle this problem, a new coordinated multipoint (CoMP) transmission and reception technique is proposed by the 3GPP in the LTE-A system. In this thesis, we attempt to incorporate interference alignment (IA) into uplink CoMP systems to improve the sum-rate performance. To boost convergence rate, we further propose two efficient IA aided transceiver designs for the uplink CoMP systems. One is the block QR decomposition (BQRD) aided IA that incorporates the concept of successive interference (SIC). The other is the two-stage IA that optimizes the structure of the effective channel and employs power loading. From simulation results, the proposed algorithms exhibit better convergence behavior and have comparable performance to the max-SINR IA. Requiring only a small number of iterations to converge, the proposed algorithms are suitable to practical applications.
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