關于FPGA流水線設計的論文
This work investigates the use of very deep pipelines for
implementing circuits in FPGAs, where each pipeline
stage is limited to a single FPGA logic element (LE). The
architecture and VHDL design of a parameterized integer
array multiplier is presented and also an IEEE 754
compliant 32-bit floating-point multiplier. We show how to
write VHDL Cells that implement such approach, and how
the array multiplier architecture was adapted. Synthesis
and simulation were performed for Altera Apex20KE
devices, although the VHDL code should be portable to
other devices. For this family, a 16 bit integer multiplier
achieves a frequency of 266MHz, while the floating point
unit reaches 235MHz, performing 235 MFLOPS in an
FPGA. Additional Cells are inserted to synchronize data,
what imposes significant area penalties. This and other
considerations to apply the technique in real designs are
also addressed.
ARM7硬件說明與開發
The ARM7 is a low-power, general purpose 32-bit RISC microprocessor macrocell for use in application or
customer-specific integrated circuts (ASICs or CSICs). Its simple, elegant and fully static design is
particularly suitable for cost and power-sensitive applications. The ARM7’s small die size makes it ideal for
integrating into a larger custom chip that could also contain RAM, ROM, logic, DSP and other Cells.
An Efficient and Effective Detailed Placement Algorithm
Global Swap
To identify a pair of Cells that can be swapped to reduce wirelength (others are fixed).
2. Vertical Swap
Swap a cell with a nearby cell in the segment above or below.
3. Local Re-ordering
Re-order consecutive Cells locally to reduce wirelength.
4. Single-Segment Clustering
Place Cells optimally within a segment.
This MATLAB M-file implements the finite-difference time-domain solution of Maxwell s curl equations over a one-dimensional space lattice comprised of uniform grid Cells.
Creating barcodes in Microsoft廬 Office has never been easier.
With BarCodeWiz Toolbar you can add barcodes to Microsoft廬 Office applications with a click of a button. In Microsoft廬 Word, create single barcodes, pages of labels, or mail merge documents. In Microsoft廬 Excel廬, select a range of Cells and automatically convert each cell to a barcode. In Microsoft廬 Access廬, create reports with barcodes based on your data tables.
DDSCAT 7.3 is a freely available open-source Fortran-90 software package applying the “discrete
dipole approximation” (DDA) to calculate scattering and absorption of electromagnetic waves by targets
with arbitrary geometries and complex refractive index. The targets may be isolated entities (e.g., dust
particles), but may also be 1-d or 2-d periodic arrays of “target unit Cells”, which can be used to study
absorption, scattering, and electric ?elds around arrays of nanostructures.
The surge of mobile data traffic forces network
operators to cope with capacity shortage. The deployment of
small Cells in 5G networks is meant to reduce latency, backhaul
traffic and increase radio access capacity. In this context, mobile
edge computing technology will be used to manage dedicated
cache space in the radio access network. Thus, mobile network
operators will be able to provision OTT content providers with
new caching services to enhance the quality of experience of their
customers on the move.
Homogeneous Partitioning of the Surveillance Volume discusses the
implementation of the first of three sequentially complementary approaches for
increasing the probability of target detection within at least some of the Cells of
the surveillance volume for a spatially nonGaussian or Gaussian “noise”
environment that is temporally Gaussian. This approach, identified in the Preface
as Approach A, partitions the surveillance volume into homogeneous contiguous
subdivisions.
At the macroscopic level of system layout, the most important issue is path loss. In the
older mobile radio systems that are limited by receiver noise, path loss determines SNR and
the maximum coverage area. In cellular systems, where the limiting factor is cochannel
interference, path loss determines the degree to which transmitters in different Cells interfere
with each other, and therefore the minimum separation before channels can be reused.
In a cellular communication system, a service area or a geographical
region is divided into a number of Cells, and each cell is served by an
infrastructure element called the base station through a radio interface.
Management of radio interface related resources is a critical design
component in cellular communications.
