Performance Comparison between Fountain Codes-Based Secure MIMO Protocols with and without Using Non-Orthogonal Multiple Access

Abstract

In this paper, we propose and evaluate the performance of fountain codes (FCs) based secure transmission protocols in multiple-input-multiple-output (MIMO) wireless systems, in presence of a passive eavesdropper. In the proposed protocols, a source selects its best antenna to transmit fountain encoded packets to a destination that employs selection combining (SC) or maximal ratio combing (MRC) to enhance reliability of the decoding. The transmission is terminated when the destination has a required number of the encoded packets to reconstruct the original data of the source. Similarly, the eavesdropper also has the ability to recover the source data if it can intercept a sufficient number of the encoded packets. To reduce the number of time slots used, the source can employ non-orthogonal multiple access (NOMA) to send two encoded packets to the destination at each time slot. For performance analysis, exact formulas of average number of time slots (TS) and intercept probability (IP) over Rayleigh fading channel are derived and then verified by Monte-Carlo simulations. The results presented that the protocol using NOMA not only reduces TS but also obtains lower IP at medium and high transmit signal-to-noise ratios (SNRs), as compared with the corresponding protocol without using NOMA.

Analysis of Security-Reliability Trade-off for Multi-hop Cognitive Relaying Protocol with TAS/SC Technique

“…In this section, two practical TAS/SC techniques are considered. The TAS/SC technique is proposed in [12], in which the transmitter and receiver select an optimal transmit-receive antennas to maximize the instantaneous SINR of the data link. However, with presence of the co-channel interference, the TAS/SC technique in [12] may not be optimal any more.…”

“…The TAS/SC technique is proposed in [12], in which the transmitter and receiver select an optimal transmit-receive antennas to maximize the instantaneous SINR of the data link. However, with presence of the co-channel interference, the TAS/SC technique in [12] may not be optimal any more. This motivates us to reconsider the TAS/SC technique in the interference environment.…”

“…Comment 2: The transmit power of the secondary transmitters is calculated by the primary network as in (12), and then sent to the (13) shows that as T P is high enough, the primary QoS is always satisfied, and the transmit power 1 S k P − becomes a linear function of T P .…”

“…The implementation of MRT is hence more difficult than that of TAS, but it obtains higher performance. To further enhance the system performances for wireless communication systems, combination between the transmit diversity and receiver diversity techniques, such as TAS/SC [12], TAS/MRC [12], MRT/SC [13], MRT/MRC [14], were proposed.…”

Outage Probability and Intercept Probability Of Cognitive IoTs Networks With Relay Selection, Passive Eavesdropper and Hardware Noises

“…For the secure communication in PLS over fading channels, the data links should be better than the eavesdropping ones. In [5]- [8], diversity-based transmitting/ receiving techniques in multi-input multi-output (MIMO) networks were proposed to increase SNR of the data channels. In [9]- [11], various cooperative jamming approaches were proposed to reduce SNR of the eavesdropping channels.…”