H - Electricity – 04 – L
Patent
H - Electricity
04
L
325/28, 354/69
H04L 27/00 (2006.01) H04L 27/18 (2006.01) H04L 27/20 (2006.01)
Patent
CA 1226905
A METHOD AND SYSTEM FOR DIGITAL DATA TRANSMISSION ABSTRACT A system and method for digital transmission of pulses of a predetermined duration includes a transmitter (30) and a receiver (40). A data stream (ai) is trans- formed into a narrow band signal spectrum and following transmission is demodulated to a data stream (ai). In one form of the invention concept, a Delta function spec- trum is converted into a quasi-rectangular transmitter spectrum by appropriate filters (26). In the receiver (40), a filter (28) is employed for data recovery. Data symbols which are received by the receiver (40) are de- coupled by using periodic zeros of an autocorrelation function obtained at the receiver output filter. The shape factor of filters used in the overall system is selected to be preferably within the approximate range of 1.0 - 3Ø By selecting suitable slope responses of the aforementioned filters, the duration of the auto- correlation function and the resulting systems may be controlled for optimized results.
437227
Gowling Lafleur Henderson Llp
Meinzer Karl
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