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MIMO technology increases channel capacity and data rates using multiple antennas and multiple receiver chains. In wideband scenario, each receiver has multiple copies of estimated channel matrices, and selection of a well conditioned channel matrix is required for faithful detection. There are ample of methods reported for channel estimation. This paper presents an algorithm which selects a desired...
Mutual variation of the received signal which occurs as a consequence of the channel reciprocity property has recently been proposed as a viable method for secret key generation. However, this cannot be strictly maintained in practice as the property is applicable only in the absence of interference. To ensure the propagation defined key remains secret, one requirement is that there remain high degrees...
Channel randomness can be exploited to generate secret keys. However, to ensure secrecy, it is necessary that the channel response of any eavesdropping party remain sufficiently de-correlated with that of the legitimate users'. In this paper, we investigate whether such de-correlation occurs for a body area network (BAN) operating in an indoor environment at 2.45 GHz. The hypothetical BAN configuration...
Direct-sequence spread spectrum (DSSS) is a candidate technique for long range acoustic communications (LRAC) in deep water. However, its data rate is quite low. To achieve a higher data rate, M-ary parallel combinatory communication (MPCC) scheme is adopted in this paper. The major obstacle encountered for LRAC is extended multipath propagation, which would cause severe inter-symbol interference...
Detection and identification of multiple radio controlled (RC) devices emitting unintended passive emissions has attracted much attention due to its importance in many security applications. This paper describes and analyzes major challenges in detection of multiple independent radio controlled (RC) sources in real life environment. A time based correlation method is proposed for array detectors to...
A selection of the working band (sampling duration) of the sampler for optimal recording of noisy videopulse radar signals has been considered in the present work.
Outage probability of a selection combiner (SC) receiver is analyzed over exponentially correlated composite Weibull-gamma fading channels. An expression for the joint probability density function (PDF) of multivariate, exponentially correlated Weibull-gamma distributed random variable is obtained. Using this joint PDF, we derive an expression for the outage probability of a SC receiver with arbitrary...
In this paper, for the problem of spatial correlation and frequency correlation of targets echoes in receiving channels of diversity MIMO radar, based on two-dimensional scatter model in polar coordination system, correlation coefficient and independent condition of radar target echoes in spatial and frequency diversity receiving channels are developed, indicating that for round shaped scatter model...
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