Name
Abstract | ||
|---|---|---|
In this paper, we investigate a physical layer security technique in an orthogonal frequency-division multiplexing (OFDM) based wireless communications. In an OFDM system, the legitimate transmitter (Alice) can increase secrecy capacity with proper power allocation and/or bit loading methods for example by maximizing mutual information for own communication, i.e. between Alice and the legitimate receiver (Bob). The reason of increasing secrecy capacity is that the power allocation is suitable for the channel state between Alice and Bob but not suitable for the channel state between Alice and the eavesdropper (Eve). In this paper, we investigate a new approach where dummy data is exploited to achieve further improvement of secrecy capacity. Specifically, real data and dummy data are implemented in transmit OFDM symbols and secure pilot signals are employed to inform the receiver about their respective locations. Two secure pilot signal designs are introduced and in both of them it is designed that Bob can easily detect correct real data locations but not for Eve. One of them uses fake pilot signals that cause Eve to mistakenly select dummy data as real data. Numerical results will show that secrecy capacity performance of the first secure pilot signal based secure communication (not using fake signal) is slightly less than the performance of water filling algorithm. One significant advantage of the first secure pilot signal based secure communication is that the computational cost should be significantly less than the water filling algorithm. In addition, we will show that fake pilot signal based secure communication can provide significant gain in secrecy capacity while the computational cost is still small. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/APSIPA.2014.7041552 | Asia-Pacific Signal and Information Processing Association, 2014 Annual Summit and Conference |
Keywords | Field | DocType |
OFDM modulation,channel capacity,receivers,telecommunication security,transmitters,wireless channels,OFDM based wireless communications,bit loading methods,channel state,computational cost,dummy data,eavesdropper,fake pilot signal based secure communication,legitimate receiver,legitimate transmitter,mutual information,orthogonal frequency-division multiplexing based wireless communications,physical layer security technique,power allocation,real data locations,secrecy capacity,secure pilot signals,transmit OFDM symbols | Alice and Bob,Computer security,Computer science,Computer network,Water filling algorithm,Communication channel,Dummy data,Multiplexing,Pilot signal,Orthogonal frequency-division multiplexing,Secure communication | Conference |
ISSN | Citations | PageRank |
2309-9402 | 1 | 0.34 |
References | Authors | |
5 | 3 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Kenta Umebayashi | 1 | 1 | 0.34 |
| Nakabayashi, F. | 2 | 1 | 0.34 |
| Yasuo Suzuki | 3 | 1 | 0.34 |