Multi-band digital receiving apparatus and method with...

Details Multi-band digital receiving apparatus and method with... Multi-band digital receiving apparatus and method with...

H - Electricity

04

B

H04B 1/16 (2006.01) H04B 1/66 (2006.01)

Patent

CA 2067652

Multiple simultaneous uses of a multi-service digital receiver are made possible with a single practical analog- to-digital converter (38) by translating the various ser- vice bands in frequency to form a single, generally contin- uous composite service band in which substantial frequency gaps (6) between the different services are eliminated. Bandwidth requirements are further reduced by a bandfolding technique in which at least one service waveband is divided about an intermediate mixing frequency (Fmix), the divided portions are overlapped so that they collectively occupy a sub-waveband with a smaller bandwidth than the original band, and the mixing frequency (Fmix) is chosen such that user-selected frequencies do not interfere with other ac- tive frequencies. Interference between non-selected active frequencies is permissible and simply ignored.

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