A suboptimal iterative demodulation and decoding receiver is presented for an LDPC coded spatial multiplexing OFDMA system. The proposed receiver is based on spatial demultiplexing at the first iteration and the interference cancellation with soft decoding outputs at the following iterations. It is shown that the proposed receiver can reduce the complexity of the optimal iterative demodulation ...

Demodulation techniques are of central importance for achieving intelligent receiving. Improvement in demodulation performance enhances the overall a communication system correspondingly. However, conventional demodulators require dedicated hardware platforms leading to high implementation costs and time-consuming development. This work proposes unified architecture end-to-end automatic demodul...

Long-range (LoRa) communication has attracted much attention recently due to its utility for many Internet of Things applications. However, one the key problems LoRa technology is that it vulnerable noise/interference use only up-chirp signals during modulation. In this paper, solve problem, unlike conventional modulation scheme, we propose a scheme based on joint up- and down-chirps. A fast Fo...

A number of recent scientific and engineering problems require signals to be decomposed into a product of a slowly varying positive envelope and a quickly varying carrier whose instantaneous frequency also varies slowly over time. Although signal processing provides algorithms for so-called amplitudeand frequencydemodulation (AFD), there are well known problems with all of the existing methods....

Magnetic twisting cytometry (MTC) (Wang N, Butler JP, and Ingber DE, Science 260: 1124-1127, 1993) is a useful technique for probing cell micromechanics. The technique is based on twisting ligand-coated magnetic microbeads bound to membrane receptors and measuring the resulting bead rotation with a magnetometer. Owing to the low signal-to-noise ratio, however, the magnetic signal must be modula...