Secret key extraction is a crucial issue in physical layer security and a less complex and, at the same time, a more robust scheme for the next generation of 5G and beyond. Unlike previous works on this topic, in which Orthogonal Frequency Division Multiplexing (OFDM) sub-channels were considered to be independent, the effect of correlation between sub-channels on the secret key rate is address...

The 4G network are cellular network which provides higher bandwidth and fast speed but there are few security flaws and thus to protect the users privacy,a very well defined security support is mandatory. The attacker can launch a variety of active and passive attacks. Thus security mechanism is to be defined for call security in 4G/LTE network. The existing schemes includes both plain-text and...

A method is proposed to reduce the complexity of ML decoding for MIMO systems based on PSK constellation with two transmit antennas. We use the feature that the points of a PSK constellation form a finite group under complex multiplication to substantially reduce the decoding complexity. The proposed method of decoding is used for both BLAST systems and a new full-rate full-diversity space-time...

We consider distributed estimation of a Gaussian vector with a linear observation model in an inhomogeneous wireless sensor network, where a fusion center (FC) reconstructs the unknown vector, using a linear estimator. Sensors employ uniform multi-bit quantizers and binary PSK modulation, and communicate with the FC over orthogonal powerand bandwidth-constrained wireless channels. We study tran...

The asymptotic Elias upper bound of codes designed for Hamming distance is well known. Piret [3] and Ericsson [4] have extended this bound for codes over symmetric PSK signal sets with Euclidean distance and for codes over signal sets that form a group, with a general distance function respectively. The tightness of these bounds depend on a choice of a probability distribution, and finding the ...

PSK interference rejection using complex adaptive filter with conditional response recalculation in DS-SS/PSK system is considered in this paper. New adaptive filter decreases error probability for several orders of magnitude when compared to the standard adaptive transversal filter.