On the Sum Rate of BICM-ID Transmission Over Vector-Perturbation Precoding in Multiuser Downlink

Sanjeewa P. Herath, Duy H. N. Nguyen, Nghi H. Tran, Tho Le-Ngoc
2016 IEEE Transactions on Vehicular Technology  
This paper proposes a channel code for vectorperturbation (VP) precoded transmission in multi-user downlink and examines its achievable sum-rate performance. In particular, we first find the most suitable outer convolutional code for VP precoded transmission under bit-interleaved coded-modulation with iterative decoding (BICM-ID) by applying a semi-analytic technique based on extrinsic information transfer charts. We then study the achievable sum-rate of the proposed BICM-ID based VP precoded
more » ... based VP precoded system and compare it with the sum-capacity of dirty paper coding (DPC) scheme. Our investigation shows that under perfect channel state information (CSI), the sum-rate of the proposed system grows linearly over the number of users, which is the same growth of the DPC. Under quantized CSI and finite-rate feedback, a linear increase in feedback overhead per user is necessary to maintain such a linear sum-rate growth.
doi:10.1109/tvt.2015.2501242 fatcat:6gljrpdwkbbxfeipd2a2sjbqje