Chaos based communications have drawn increasing attention over the past years. Chaotic signals are derived from non-linear dynamic systems. They are aperiodic, broadband and deterministic signals that appear random in the time domain. Because of these properties, chaotic signals have been proposed to generate spreading sequences for wide-band secure communication recently. Like conventional DS...

For the first time, to best of our knowledge, hybrid triple coding empowered frequency division multiple access (FDMA)-code (CDMA) mode coded optical sensor (CAOS) camera is demonstrated. Compared independent FDMA and CDMA modes, FDMA-CDMA has a novel high-security space-time-frequency signal encoding design for robust, faster, linear irradiance extraction at moderately high dynamic range (HDR)...

Abstract Alltop functions have applications to code-division multiple access (CDMA) systems and mutually unbiased bases (MUBs). construct MUBs CDMA signal sets, this motivates the continued search for further functions. The discovery of is hindered by computational complexity verification. This paper narrows space through introduction a characteristic cubic polynomial provides verification proc...

The spectrum used by Code Division Multiple Access (CDMA) allows for a signal with greater bandwidth spreading electromagnetic energy. Multi-Carrier CDMA (MC-CDMA) is telecommunications numerousentrée strategy that spreads each user symbol across the frequency domain distinct codes. Cognitive Radio (CR) vibrant admittance enabling technology dynamically allocating space fundamental users modify...

Recently, blind multi-user detection has become an important topic in code division multiple access (CDMA) systems. Direct-Sequence Spread Spectrum (DSSS) signals are well-known due to their low probability of detection, and secure communication. In this article, the problem of blind multi-user detection is studied in variable processing gain direct-sequence code division multiple access (VPG D...