Efficient methods for filtering to avoid inter-symbol...

Details Efficient methods for filtering to avoid inter-symbol... Efficient methods for filtering to avoid inter-symbol...

2006-09-26

2006-09-26

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S229000, C375S285000, C708S300000

Reexamination Certificate

active

07113559

ABSTRACT:
A circular filtering system that prevents the problem of inter-symbol interference. The circular filtering system utilizes a buffer memory to store samples of a given symbol and provide only these samples to a linear filter such that the output of the filter, for any given symbol is formed by filtering only samples of that input symbol. Each symbol being filtered independent of other symbols hence eliminating inter-symbol interference caused by filtering. Where symbols are tolerant to a fixed phase shift for each symbol, the circular filtering system can be simplified by reducing the size of the buffer and introducing a multiplexer.

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