This paper presents the performance of Space-Time (ST) codes over rapid fading channels. A tight upper bound on the pairwise error probability (PWEP) of ST codes over rapid fading channels is derived. Also, an upper bound on the bit error probability (BEP) is evaluated using the derived PWEP. The existing and new bounds are evaluated for different QPSK ST codes and compared to the simulation re...

Due to their correlation properties, chaotic sequences can be used in direct sequence spread spectrum systems. In this paper the application of these sequences for design of physical layer in wireless sensor networks is presented. In order to mitigate fading the chip interleaving technique is investigated. Theoretical expressions in closed form for the bit error rate (BER) are derived and confi...

The paper investigates the notion of outage, as an assessment of the likelihood of a bit being in error, for chaos-based communication systems. It is seen as a complementary measure of performance to bit error rate. For antipodal chaos shift keying (CSK) a theoretically exact formula is derived which is then used in specific cases to obtain useful qualitative and quantitative information. Illus...

Motivated by a wide-spread use of convex optimization techniques, convexity properties of bit error rate of the maximum likelihood detector operating in the AWGN channel are studied for arbitrary constellations and bit mappings, which may also include coding under maximum-likelihood decoding. Under this generic setting, the pairwise probability of error and bit error rate are shown to be convex...

Accuracy in cataloguing records is of paramount importance in catalogues. It is not difficult to imagine that errors in the metadata hamper the retrieval of bibliographic records. The present study attempts to investigate the error rate found in the metadata records of the Mysore University Library (MUL). The MUL is one of the oldest university libraries in the country, India. The study selecte...

A direct conversion modulator-demodulator with even harmonic mixers with emphasis on noise analysis is presented. The circuits consist of even harmonic mixers (EHMs) realized with antiparallel diode pairs (APDPs). We evaluate the different levels of I/Q imbalances and DC offsets and use signal space concepts to analyze the bit error rate (BER) of the proposed transceiver using M-ary QAM schemes...

Data rate, tolerable bit error rate or frame error rate and range & coverage are the key performance requirement of a communication link. In this paper performance of MFSK link is analyzed in terms of bit error rate, number of errors and total number of data processed. In the communication link model proposed, which is implemented using MATLAB block set, an improvement in BER is observed. Diffe...

Original scientific paper The paper presents the comparative investigation on non-return-to-zero and return-to-zero modulation formats for optical inverter gate at 100 Gbit/s. Various performances as eye pattern, extinction ratio and bit error rate at different bit-rate are compared based on suitability of data formats. It indicates that return-to-zero pulses are distorted in a similar pattern,...

Procedures controlling error rates measuring at least k false rejections, instead of at least one, can potentially increase the ability of a procedure to detect false null hypotheses in situations where one seeks to control k or more false rejections having tolerated a few of them. The k-FWER, which is the probability of at least k false rejections and generalizes the usual familywise error rat...