In cognitive networks, cognitive (unlicensed) users need to continuously monitor spectrum to
detect the presence of primary (licensed) users. In part I, we have illustrated the benefits of …

Relay technologies have been actively studied and considered in the standardization
process of next-generation mobile broadband communication systems such as 3GPP LTE …

This paper is on relay selection schemes for wireless relay networks. First, we derive the
diversity of many single-relay selection schemes in the literature. Then, we generalize the …

In a cooperative network with multiple potential relays and multiple simultaneous
transmissions, we present selection cooperation wherein each source pairs with a single" …

The motivation of this article is to clarify and help resolve the gap between the link
abstraction used in traditional wireless networking and its much broader definition used in …

This paper studies selective relaying schemes based on signal-to-noise-ratio (SNR) to
minimize the end-to-end (e2e) bit error rate (BER) in cooperative digital relaying systems …

This paper addresses the multiplexing loss that occurs in relay networks due to causality of
relays and the half-duplex constraint. We devise relay selection methods to recover the …

User cooperation, whereby multiple users share their antennas and transmit to a common
destination in a collaborative manner, has been shown to be an effective way to achieve …

In this paper, we study medium access control (MAC) protocol design for distributed
cooperative wireless networks. We focus on beneficial node cooperation by addressing two …

This paper is on quantized beamforming in wireless amplify-and-forward (AF) relay
networks. We use the generalized Lloyd algorithm (GLA) to design the quantizer of the …