Abstract-In this paper, we focus on the millimeter-wave multiuser multiple-input-multiple-output (mmWave MU-MIMO) systems and propose a low-complexity hybrid precoding and combining design, which is applicable to both fully-connected structures and sub-connected structures. Based on the channel knowledge of each user, the analog combiner for each user is independently designed based on the singular value decomposition (SVD), while the analog precoder is obtained by the conjugate transposition to maximize the effective channel gain. Then, with the resulting effective analog channel, lowdimensional baseband precoders can be efficiently applied. The proposed scheme requires no optimization techniques or any complicated iterative algorithms, while the numerical results show that it can approach the performance of fully digital schemes and even achieve a better performance in some scenarios. It is also observed that sub-connected structures can achieve a much higher power efficiency compared to fully-connected structures and are therefore promising for the future green communication systems. Index Terms-Millimeter-Wave, MU-MIMO, hybrid design, SVD, power efficiency.
The numerical results in REF illustrate that the fullyconnected structure can provide better precoding performance than the sub-connected structure.
Hybrid precoding and combining design for millimeter-wave multi-user MIMO based on SVD
2017 IEEE International Conference on Communications (ICC)
2017 IEEE International Conference on Communications (ICC)
Computer Science