Barrage and deceptive jamming can mask the synthetic aperture radar (SAR) signals and render SAR useless. In this paper, a novel jamming suppression method based on polarization SAR (PolSAR) is proposed. After range compression, the barrage jamming has a noise-like characteristic while the real echo and deceptive jamming are focused. According to this, the barrage jamming is removed via a minim...

We study the problem of optimizing the symbol error probability (SEP) performance of cluster-based cooperative wireless sensor networks. Recent studies in literature show that an efficient relay selection protocol based on simple geographical information of the nodes to execute cooperative diversity can significantly improve the SEP performance at the destination of such networks. As well, simi...

In this paper, we propose minimum power allocation strategies for repetition-based amplifyand-forward (AF) relaying, given a required symbol error rate (SER) at the destination. We consider the scenario where one source and multiple relays cooperate to transmit messages to the destination. We derive the optimal power allocation strategy for two-hop AF cooperative network that minimizes the tota...

Radio frequency (RF) energy transfer and harvesting has been intensively studied recently as a promising approach to significantly extend the lifetime of energy-constrained wireless networks. This technique has a great potential to provide relatively stable and continuous RF energy to devices wirelessly, it thus opened a new research paradigm, termed wireless-powered communication (WPC), which ...

Cooperative communications are effective in improving the performance and extend the coverage of wireless networks. One issue is to find proper methods to allocate cooperative nodes. In this paper we investigate the effects of relay position and power allocation strategy in cooperative communications employing space-time codes (STCs). We consider non-ideal links between source, relay, and desti...

Cooperative diversity has emerged as a promising technique to combat fading in wireless communications (Sendonaris et. al., 2003a; Sendonaris et. al., 2003b). It is based on the broadcast nature of the wireless medium and enables single-antenna users to “enjoy” space diversity benefits by sharing their physical resources through a virtual transmit and/or receive antenna array. The basic relay c...

Cooperative communication has achieved major research concern due to its ability to enlarge system coverage and improve spectrum efficiency. Consider, a transmit cooperative beamforming design, for the scenario with multiple-input-multiple-output (MIMO) decode-and-forward (DF) relay channel with a direct source to destination link. The achievable information rate (bits/s) for a given transmit s...

In this chapter, we discuss single and double-differential coding for a two-user cooperative communication system. The single-differential coding is important for the cooperative systems as the data at the destination/relaying node can be decoded without knowing the channel gains. The double-differential modulation is useful as it avoids the need of estimating the channel and carrier offsets fo...

-Due to the mobility of nodes, connection failure between source and destination often occurs in ad-hoc networks. While sending data packets from source to destination, congestion might occur at any node incurring high packet loss and long delay, resulting in performance degradation of the network. Recently, cooperative communication has received tremendous attention in wireless network applica...