On relay-interference networks with quantized feedback

We study quantized beamforming in wireless relay-interference networks with multiple transmitter-receiver pairs. For given transmitter rate requirements, we design structured distributed quantizers specifically to optimize the symbol error rate performance. We show that our quantizers achieve both maximal diversity and very high array gain using arbitrarily low feedback rates per receiver. Simulations are also provided, confirming our analytical results. We observe that our quantizers guarantee an equal diversity gain for each transmitter-receiver pair.