A design of rate-compatible polar codes suitable for HARQ communications is proposed in this paper. An important feature of the proposed design is that the puncturing order is chosen with low complexity on a base code of short length, which is then further polarized to the desired length. A practical ratematching system that has the flexibility to choose any desired rate through puncturing or r...

Type-II Hybrid-ARQ (Type-II HARQ) has been shown, under certain circumstances, to increase the efficiency and reduce loss of data transmissions over a wireless channel. However, it is difficult to predict how it will perform when transmission symbol errors are correlated. We present a computationally efficient approach to the performance evaluation of packet transmissions over a wireless link e...

This paper investigates secure transmission using HARQ protocol when the encoder only knows the statistics of the channel-state. We analyze the tradeoff between reliability and secrecy probabilistic guarantees. The conventional approach of ensuring the secrecy via introduction of dummy-message is followed. However, unlike the previous works on this subject, we design a coding strategy tailored ...

In this paper, we study the combining scheme for type I hybrid Automatic Repeat-reQuest (HARQ) in MIMO-OFDM system. A new pre-combining scheme based on hybrid QRMC detector is proposed. The proposed scheme is applied to HARQ with various bit rearrangement strategies. The significant gain has been obtained for both slow fading and fast fading channel comparing with the system using near optimal ...

Wireless Sensor Networks (WSN) has drawn significant attention recently as a key important factor especially in sensitive areas, through which, data can be simply collected and transmitted. However, we lack practical WSN that promises a high-speed, real time and energy efficient communication with a small size cell battery. In this paper, we proposed a novel cross-layer Hybrid Automatic Repeat ...

Scheduling of the transmission of status updates over an error-prone communication channel is studied in order to minimize the long-term average age of information (AoI) at the destination, under an average resource constraint at the source node, which limits the average number of transmissions. After each transmission, the source receives an instantaneous ACK/NACK feedback, and decides on the ...

In order to reduce the influence of multipath propagation on signal transmission in the OFDM wireless network, a novel HARQ scheme based on frequency diversity and Energy-MRC is proposed. This scheme takes the times of accurate transmission of previous data as reference value of present data transmission. When the data is retransmitted, the position in which information sequence lives after con...