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Recently, researches based on the Compressed Sensing (CS) become an important direction in the field of signal processing. The newly proposed system called Modulated Wideband Converter (MWC), which breaks through the limit of traditional Nyquist sampling, has presented huge advantages in sub-Nyquist sampling technique. It is composed of several analog channels that alias the signal intentionally before sampling it at a low rate. Then the signal can be reconstructed from the samples by using some commonly used algorithms in compressed sensing theory. It is one of the most successful compressive sampling hardware architectures, but in real hardware implementation, the digital board is fairly difficult to realize. In this paper, we made exploration of the MWC sampling theory and designed a three channels prototype system. To realize the 1  logic waveform, we present using Rocket I/O on Xilinx FPGA. In this way, the hardware system can be simplified so as to implement quickly. Through hardware experiments and algorithm reconstruction, we verify the feasibility of MWC system in sub-Nyquist sampling theory.

INTRODUCTIONNowadays, the technology applications and programming models in the Multi-Processors System-on-Chip (MPSoC), the multicast communications and the broadcast communications are becoming common. In a multi-processors system, the cache-coherent shared memory protocols (such as directory-based or token-based) require one-to-many or broadcast communications to require shared data or invalidate shared data on diverse cache blocks [1]. It has been stated that only 3-5% multicast traffic will have a serious impact on system performance in the total network traffic [1]. Thus, the supporting multicast communication in NoC can enhance system performance significantly. However, for the moment, Multicasting chip router designs [2,3,4,5] are only on the buffer router. There is almost no router designs that sustains multicasting on the bufferless router.On the other hand, the following issues make the multicast communication more complicated. The first issue is the irregular topology structure. Applying virtualization [6] allows multiple applications mapping to different sub-network at the NoC level. The sub-network is often irregular and it negates regular routing algorithms, such as odd-even routing, XY routing and so on [7]. The other is many kinds of application communication behavior, such as embedded systems, desktop applications. As a result, the customized multicast routing approaches as the using routing tables may not suit to them.The 3D NoC architecture is widely studied in the network topology Shaojun WeiThe Department of Electronic Systems, Tsinghua University, Beijing, China ABSTRACT: In this paper, the authors proposed two multicast routing algorithms for irregular 3D mesh-based Bufferless Interconnection Network. The DRM-1 scheme sends multicast through a non-deterministic path. The DRM-2 scheme broke multicast into multiple single packets. Compared with the DRM-1 multicast routing algorithm, DRM-2 scheme with four different synthetic workloads acquires high system performance.