Spatial transmit diversity schemes are now well integrated into third-generation cellular mobile communication system specifications. When DS-CDMA-based technology is deployed in typical macroand microcell environments, multipath diversity and spatial diversity may be exploited simultaneously by a 2D RAKE receiver. The work presented in this paper focuses on taking advantage of spatial transmit...

We derive Chernoff bounds on pairwise error probabilities of coherent and noncoherent space-time signaling schemes. First, general Chernoff bound expressions are derived for a correlated Ricean fading channel and correlated additive Gaussian noise. Then, we specialize the obtained results to the cases of space-timeseparable noise, white noise, and uncorrelated fading. We derive approximate Cher...

Optimal signal energies are derived for optimal binary digital communication systems with arbitrary signal probabilities and correlation with both coherent and noncoherent detection. The resulting bit-error probability (BEP) is computed and compared with the BEP of the same systems with equal signal energies. One of the conclusions is that for the coherent system with nonegative correlation, an...

This paper presents noncoherent limiter-discriminator detection and differential detection of FQPSK (Feher quadrature phase-shift-keying) with maximum-likelihood sequence estimation (MLSE) techniques. Noncoherent FQPSK systems are suitable for fast fading and cochannel interference channels and channels with strong phase noise, and they can offer faster synchronization and reduce outage events ...

This paper addresses automatic modulation classification for PSK and QAM signals under coherent and noncoherent conditions. In particular, the paper extends previous results by treating the classification of higher-state QAM signals. A maximum-likelihood algorithm is presented for coherent classification of PSK and QAM signals. We evaluate the algorithms performance for various PSK and QAM modu...

An effective optical read out approach based on fiber reflective is presented to detect bends of a biomaterial microcantilever. The microcantilever was fabricated on single crystalline SOI wafer using a series of side definitions and backside wet/dry etchings. A Cr/Au layer with 30 nm Cr and 50 nm Au layer was deposited for the immobilized of bimolecular on the cantilever surface and for reflec...

For communication channels exhibiting fading and interference, noncoherent maximum likelihood (ML) block demodulation generally requires the knowledge of received signal strength, fading levels, and the phase offset introduced by the channel. Furthermore, ML block demodulation can be computationally prohibitive. This paper presents a sub-optimal block demodulation method based on a computationa...