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The Matrix range of cores is built around a set of different length
DFT cores. When these different cores are combined, they allow an
FFT to be configured to exactly match the number of points required
for the application, with the most efficient FPGA utilisation. In
one application, this type of core was also coupled with a rate
converter core to provide a channeliser bank configured to exactly
match the required output spacing and sample rate.
For many applications the standard radix-2 FFT provides an adequate
solution; however, there are some specialised applications where
a non-power-of-two FFT length is required. RFEL have a range of
prime length DFT cores such as 2-point, 3-point and 13-point that
may be combined to form a large number of possible FFT sizes.
The building blocks are supplied as intellectual property components
for system-on-programmable-chip designers. They allow specialised
and demanding multi-channel receivers to be designed in a much shorter
time scale and with a much-reduced technical risk.
As an example, in a recent channeliser design that required almost
2000 channels to be precisely extracted from a spectrum bandwidth
in excess of 40MHz, 2-point, 3-point and 13-point DFTs were integrated
into an 1872-point FFT. The design also included complex rate conversion,
Doppler correction and channel mapping capability and fitted comfortably
within a Xilinx Virtex Pro50 FPGA.
RFEL's Matrix DFT/FFT cores are intended for use in applications
where processing speed is critical and optimum use of available
silicon is required. The core is available for licence in netlist
form as a component ready to be combined with customer's own IP.
Alternatively RFEL can provide the core in bit-stream format for
a complete chip design.
Features :
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Continuous real time processing of complex data at up to 200MS/s
(faster speeds can be supported by combining multiple cores) |
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Compatible
with 400MS/s ADC using RFEL's optional DHBF core |
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Fully
pipelined design |
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Targeted
at Xilinx and Altera FPGA families |
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Bit-widths
and bit-growths adjustable at factory |
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Fully
bit-true configurable models are available |
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Wide range of DFT sizes supported |
Applications
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Wide-band filter banks. |
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Communications systems with exact required bin spacing. |
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Electronic
warfare ( radar,sonar,surveillance) |
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Medical instrumentation |
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Test instrumentation |
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Real-time spectral analysis |
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