We study quantized beamforming in wireless relay-interference networks with any
number of transmitters, relays, and receivers. We design the quantizer of the
channel state information
to minimize the probability that at least one receiver incorrectly decodes its
desired symbol(s).
Correspondingly, we introduce a generalized diversity measure that
encapsulates
the conventional one as the first-order diversity. Additionally, it
incorporates
the second-order diversity, which is concerned with the transmitter power
dependent logarithmic terms that appear in the error rate expression. We show
that, compared to the interference-free networks, the AF relay-interference
network suffers a second-order diversity loss while it is possible to achieve
the transmit diversity bound using the DF relays.