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What is all this Matched
Filter stuff anyway?
How does it help serial
data receivers(copper or optical)?
about Matched Filters and
why they produce the best Signal-to-Noise Ratio |
Receivers Unlimited has developed simple PHY circuits that can achieve the theoretical maximum Signal to Noise Ratio for optical or copper interfaces.
It is well known that a matched filter achieves the optimum SNR for a given circuit. Receivers Unlimited designs combine matched filtering with time variant circuits to achieve better performance than either alone.
These designs use circuit elements that are varied in a time short compared to a bit time. This approach allows significant gains over the current stationary filter circuits by creating a 'super' matched filter.
In the past, using stationary circuits, a matched filter was only practical at low speeds. Now, by using time-variant circuits, developed by Receivers Unlimited, matched filters are realizable at high speeds(1G/10G/100G). |
How do you implement a practical matched filter circuit and what improvement results?
Does anyone use Matched Filters today?
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