Multi-band digital receiving apparatus and method with bandwidth

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

1991-06-13

1994-01-18

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency conversion between signal source and receiver

4551681, 4551801, 4551901, 455266, 455313, 375122, H04B 116

Patent

active

052806367

ABSTRACT:
Multiple simultaneous uses of a multi-service digital receiver are made possible with a single practical analog-to-digital converter by translating the various service bands in frequency to form a single, generally continuous composite service band in which substantial frequency gaps 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, 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 is chosen such that user-selected frequencies do not interfere with other active frequencies. Interference between non-selected active frequencies is permissible and simply ignored.

REFERENCES:
patent: 4853944 (1989-08-01), Lo et al.
patent: 4881272 (1989-11-01), Eguchi
patent: 5027430 (1991-06-01), Yamauchi et al.
patent: 5058107 (1991-10-01), Stone et al.

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