A quantization method for precoder feedback in interference channel

In this paper, we modeled the precoder feedback for interference channel as a combinatorial optimization problem. Conventionally, in limited feedback, chordal distance has been used to find the best precoder index from the codebook. But, the brute force approach on the problem shows that higher sumrates can be achieved with the same sized codebook, i.e, the same feedback bits. Thus, in this paper, we propose a method to get better sum rates in limited feedback. The simulation results show that the proposed approach perform close to brute force approach and gives better sum rates than the approaches like chordal distance, maximizing SINR, etc.