Designed for real-time systems, the Patmos instruction-set architecture’s features ensure a high degree of predictability. One such feature is its dual-issue pipeline, which can issue and execute bundles up to two instructions at time. Executing in second slot predictable way increase throughput processor, but without dedicated support from compiler, this benefit cannot be unlocked. A compiler ...

Color metasurface holograms are powerful and versatile platforms for modulating the amplitude, phase, polarization, other properties of light at multiple operating wavelengths. However, current color holography can only realize static manipulation. In this study, we propose demonstrate a multiplexing technique combined with multiwavelength code-division (CDM) to dynamic Multicolor code referenc...

An alternative code-division multiple-access (CDMA) scheme to spread spectrum (SS), called spread time (ST) is proposed for badlimited multiple-access channels. ST-CDMA can be considered the be-frequency dual of SS-CDMA. In ST-GDMA pslendsraodan (PN) sequences are assigned to each user, and the Fourier tcrursf@rm of the transmitted pulse for a given user is d&mined by modulating the phase of th...

Transmission power adaptations are considered in a space-time block code (STBC) system utilizing feedback channel gain informations. We investigate the optimal power adaptation scheme that minimizes the average BER subject a fixed average transmission power constraint. We present the power gain provided by the optimal adaptation scheme over the conventional STBC without power adaptation. The po...

A certifying compiler takes a source language program and produces object code as well as a certi cate that can be used to verify that the object code satis es desirable prop erties such as type safety and memory safety Certifying compilation helps to increase both compiler robustness and program safety Compiler robustness is improved since some compiler errors can be caught by checking the obj...

Knowledge of the worst-case execution time of software components is essential in safety-critical hard real-time systems. The analysis thereof is not trivial as the execution time depends on many factors, including the underlying hardware platform, the program structure, and the code produced by the compiler. Often, the execution time is variable and highly sensitive to the input data the progr...

Current trends in networked computing include increasing bandwidth demands, dynamically reconfigurable services, and a rising share of mobile devices with wireless links. Conventional communication, being based on the remote procedure call (RPC) paradigm, is not ideally suited for these requirements, as RPC requires continuous connectivity, noticeable bandwidth, and a statically configured comm...