For a mmWave multiple input multiple output (MIMO) system, the hybrid precoding scheme is of great interest due to its lower power consumption and hardware cost, where a smaller number of RF chains are used to feed a larger scale of antenna array. In this paper we consider a flexible architecture where RF chains and antennae can be dynamically connected, and propose a greedy algorithm to achieve dynamic subarray configuration. The greedy algorithm can select the best subarrays from all the possible candidates in each search process, while the Lanczos algorithm is applied to further reduce the computation complexity. Simulation results demonstrate the superior performance of the proposed algorithm to existing works yet with a lower complexity.
|Title of host publication||IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Proceedings|
|Number of pages||5|
|Publication status||Published - 7 Nov 2019|
|Event|| 2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) - Honolulu, United States|
Duration: 22 Sep 2019 → 25 Sep 2019
|Conference||2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)|
|Period||22/09/19 → 25/09/19|