H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/69 (2006.01)
Patent
CA 2550046
A method for transmitting a spreading data signal and an intelligence signal to allow a passive recovery. Before transmission, the spreading data signal and the intelligence signal are filtered by a high-pass filter and a low-pass filter, respectively. The filtered spreading data signal and the intelligence signal are then summed to compose a composite intelligence/spreading signal (CISS). Due to the high-pass and low-pass filtering, the spreading data signal and the intelligence signal of the CISS are separated in the frequency domain. Next, the CISS is modulated by a RF modulator before transmitting to a remote receiver. As the spreading data signal and the intelligence signal of the CISS are separated in the frequency domain, the remote receiver can easily recover the intelligence signal from the received modulated CISS without complicated conversion devices.
Teghararian Sarkis
Tischler Ralph Eric
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Vtech Telecommunications Limited
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